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Yang F, Beltran-Lobo P, Sung K, Goldrick C, Croft CL, Nishimura A, Hedges E, Mahiddine F, Troakes C, Golde TE, Perez-Nievas BG, Hanger DP, Noble W, Jimenez-Sanchez M. Reactive astrocytes secrete the chaperone HSPB1 to mediate neuroprotection. SCIENCE ADVANCES 2024; 10:eadk9884. [PMID: 38507480 PMCID: PMC10954207 DOI: 10.1126/sciadv.adk9884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 02/14/2024] [Indexed: 03/22/2024]
Abstract
Molecular chaperones are protective in neurodegenerative diseases by preventing protein misfolding and aggregation, such as extracellular amyloid plaques and intracellular tau neurofibrillary tangles in Alzheimer's disease (AD). In addition, AD is characterized by an increase in astrocyte reactivity. The chaperone HSPB1 has been proposed as a marker for reactive astrocytes; however, its astrocytic functions in neurodegeneration remain to be elucidated. Here, we identify that HSPB1 is secreted from astrocytes to exert non-cell-autonomous protective functions. We show that in human AD brain, HSPB1 levels increase in astrocytes that cluster around amyloid plaques, as well as in the adjacent extracellular space. Moreover, in conditions that mimic an inflammatory reactive response, astrocytes increase HSPB1 secretion. Concomitantly, astrocytes and neurons can uptake astrocyte-secreted HSPB1, which is accompanied by an attenuation of the inflammatory response in reactive astrocytes and reduced pathological tau inclusions. Our findings highlight a protective mechanism in disease conditions that encompasses the secretion of a chaperone typically regarded as intracellular.
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Affiliation(s)
- Fangjia Yang
- Department of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, Institute of Psychiatry, Psychology and Neuroscience, King's College London, 5 Cutcombe Road, London SE5 9RX, UK
| | - Paula Beltran-Lobo
- Department of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, Institute of Psychiatry, Psychology and Neuroscience, King's College London, 5 Cutcombe Road, London SE5 9RX, UK
| | - Katherine Sung
- Department of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, Institute of Psychiatry, Psychology and Neuroscience, King's College London, 5 Cutcombe Road, London SE5 9RX, UK
| | - Caoimhe Goldrick
- Department of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, Institute of Psychiatry, Psychology and Neuroscience, King's College London, 5 Cutcombe Road, London SE5 9RX, UK
| | - Cara L. Croft
- UK Dementia Research Institute, UCL Institute of Neurology, University College London, London, UK
- Centre for Neuroscience, Surgery and Trauma, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Agnes Nishimura
- Department of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, Institute of Psychiatry, Psychology and Neuroscience, King's College London, 5 Cutcombe Road, London SE5 9RX, UK
| | - Erin Hedges
- Department of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, Institute of Psychiatry, Psychology and Neuroscience, King's College London, 5 Cutcombe Road, London SE5 9RX, UK
| | - Farah Mahiddine
- Department of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, Institute of Psychiatry, Psychology and Neuroscience, King's College London, 5 Cutcombe Road, London SE5 9RX, UK
| | - Claire Troakes
- Department of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, Institute of Psychiatry, Psychology and Neuroscience, King's College London, 5 Cutcombe Road, London SE5 9RX, UK
- London Neurodegenerative Diseases Brain Bank, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK
| | - Todd E. Golde
- Department of Neuroscience, College of Medicine, University of Florida, Gainesville, FL, USA
- Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida, Gainesville, FL, USA
- McKnight Brain Institute, College of Medicine, University of Florida, Gainesville, FL, USA
- Department of Pharmacology and Chemical Biology, Department of Neurology, Emory Center for Neurodegenerative Disease, Emory University, Atlanta, GA, USA
| | - Beatriz G. Perez-Nievas
- Department of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, Institute of Psychiatry, Psychology and Neuroscience, King's College London, 5 Cutcombe Road, London SE5 9RX, UK
| | - Diane P. Hanger
- Department of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, Institute of Psychiatry, Psychology and Neuroscience, King's College London, 5 Cutcombe Road, London SE5 9RX, UK
| | - Wendy Noble
- Department of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, Institute of Psychiatry, Psychology and Neuroscience, King's College London, 5 Cutcombe Road, London SE5 9RX, UK
- Department of Biomedical and Clinical Sciences, University of Exeter, Exeter, UK
| | - Maria Jimenez-Sanchez
- Department of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, Institute of Psychiatry, Psychology and Neuroscience, King's College London, 5 Cutcombe Road, London SE5 9RX, UK
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2
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Duangjan C, Chang X, Seidler PM, Curran SP. Oolonghomobisflavans from Camellia sinensis disaggregate tau fibrils across Alzheimer's disease models. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.02.26.582120. [PMID: 38464186 PMCID: PMC10925199 DOI: 10.1101/2024.02.26.582120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
Alzheimer's disease (AD) is a common debilitating neurodegenerative disease with limited treatment options. Amyloid-β (Aβ) and tau fibrils are well-established hallmarks of AD, which can induce oxidative stress, neuronal cell death, and are linked to disease pathology. Here, we describe the effects of Oolonghomobisflavan A (OFA) and Oolonghomobisflavan B (OFB) on tau fibril disaggregation and prionogenic seeding. Transcriptomic analysis of OF-treated animals reveals the induction of a proteostasis-enhancing and health-promoting signature. OFA treatment reduced the burden of Tau protein aggregation in a C. elegans model expressing pathogenic human tau ("hTau-expressing") and promoted Tau disaggregation and inhibited seeding in assays using ex vivo brain-derived paired helical filament tau protein fibrils from Alzheimer's disease brain donors. Correspondingly, treatment with OF improved multiple fitness and aging-related health parameters in the hTau-expressing C. elegans model, including reproductive output, muscle function, and importantly, reversed the shortened lifespan stemming from pathogenic Tau expression. Collectively, this study provides new evidence supporting the neuroprotective effects of OFs and reveal a new therapeutic strategy for targeting AD and other neurodegenerative diseases characterized by tauopathy.
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3
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Shi P, Wu J, Li M, Cao Y, Wu J, Ren P, Liu K, Zhou J, Sha Y, Zhang Q, Sun H. Upregulation of Hsp27 via further inhibition of histone H2A ubiquitination confers protection against myocardial ischemia/reperfusion injury by promoting glycolysis and enhancing mitochondrial function. Cell Death Discov 2023; 9:466. [PMID: 38114486 PMCID: PMC10730859 DOI: 10.1038/s41420-023-01762-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 11/28/2023] [Accepted: 12/06/2023] [Indexed: 12/21/2023] Open
Abstract
Research suggests that ischemic glycolysis improves myocardial tolerance to anoxia and low-flow ischemia. The rate of glycolysis during ischemia reflects the severity of the injury caused by ischemia and subsequent functional recovery following reperfusion. Histone H2AK119 ubiquitination (H2Aub) is a common modification that is primarily associated with gene silencing. Recent studies have demonstrated that H2Aub contributes to the development of cardiovascular diseases. However, the underlying mechanism remains unclear. This study identified Hsp27 (heat shock protein 27) as a H2Aub binding protein and explored its involvement in mediating glycolysis and mitochondrial function. Functional studies revealed that inhibition of PRC1 (polycomb repressive complex 1) decreased H2Aub occupancy and promoted Hsp27 expression through inhibiting ubiquitination. Additionally, it increased glycolysis by activating the NF-κB/PFKFB3 signaling pathway during myocardial ischemia. Furthermore, Hsp27 reduced mitochondrial ROS production by chaperoning COQ9, and suppressed ferroptosis during reperfusion. A delivery system was developed based on PCL-PEG-MAL (PPM)-PCM-SH (CWLSEAGPVVTVRALRGTGSW) to deliver PRT4165 (PRT), a potent inhibitor of PRC1, to damaged myocardium, resulting in decreased H2Aub. These findings revealed a novel epigenetic mechanism connecting glycolysis and ferroptosis in protecting the myocardium against ischemia/reperfusion injury.
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Affiliation(s)
- Pilong Shi
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, Heilongjiang, 163319, China
| | - Jiawei Wu
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, Heilongjiang, 163319, China
| | - Minghui Li
- Department of Pharmaceutics, Harbin Medical University-Daqing, Daqing, Heilongjiang, 163319, China
| | - Yonggang Cao
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, Heilongjiang, 163319, China
| | - Jiabi Wu
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, Heilongjiang, 163319, China
| | - Ping Ren
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, Heilongjiang, 163319, China
| | - Kai Liu
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, Heilongjiang, 163319, China
| | - Jiajun Zhou
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, Heilongjiang, 163319, China
| | - Yuetong Sha
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, Heilongjiang, 163319, China
| | - Qianhui Zhang
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, Heilongjiang, 163319, China
| | - Hongli Sun
- Department of Pharmacology, Harbin Medical University-Daqing, Daqing, Heilongjiang, 163319, China.
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4
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He C, Gu J, Wang D, Wang K, Wang Y, You Q, Wang L. Small molecules targeting molecular chaperones for tau regulation: Achievements and challenges. Eur J Med Chem 2023; 261:115859. [PMID: 37839344 DOI: 10.1016/j.ejmech.2023.115859] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 09/26/2023] [Accepted: 10/05/2023] [Indexed: 10/17/2023]
Abstract
Abnormal post-translational modification of microtubule-associated protein Tau (MAPT) is a prominent pathological feature in Alzheimer's disease (AD). Previous research has focused on designing small molecules to target Tau modification, aiming to restore microtubule stability and regulate Tau levels in vivo. However, progress has been hindered, and no effective Tau-targeted drugs have been successfully marketed, which urgently requires more strategies. Heat shock proteins (HSPs), especially Hsp90 and Hsp70, have been found to play a crucial role in Tau maturation and degradation. This review explores innovative approaches using small molecules that interact with the chaperone system to regulate Tau levels. We provide a comprehensive overview of the mechanisms involving HSPs and their co-chaperones in the Tau regulation cycle. Additionally, we analyze small molecules targeting these chaperone systems to modulate Tau function. By understanding the characteristics of the molecular chaperone system and its specific impact on Tau, we aim to provide a perspective that seeks to regulate Tau levels through the manipulation of the molecular chaperone system and ultimately develop effective treatments for AD.
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Affiliation(s)
- Chenxi He
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Jinying Gu
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Danni Wang
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Keran Wang
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Yuxuan Wang
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Qidong You
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China.
| | - Lei Wang
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing, 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, China.
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5
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Pratt MR, Vocadlo DJ. Understanding and exploiting the roles of O-GlcNAc in neurodegenerative diseases. J Biol Chem 2023; 299:105411. [PMID: 37918804 PMCID: PMC10687168 DOI: 10.1016/j.jbc.2023.105411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/18/2023] [Accepted: 10/23/2023] [Indexed: 11/04/2023] Open
Abstract
O-GlcNAc is a common modification found on nuclear and cytoplasmic proteins. Determining the catalytic mechanism of the enzyme O-GlcNAcase (OGA), which removes O-GlcNAc from proteins, enabled the creation of potent and selective inhibitors of this regulatory enzyme. Such inhibitors have served as important tools in helping to uncover the cellular and organismal physiological roles of this modification. In addition, OGA inhibitors have been important for defining the augmentation of O-GlcNAc as a promising disease-modifying approach to combat several neurodegenerative diseases including both Alzheimer's disease and Parkinson's disease. These studies have led to development and optimization of OGA inhibitors for clinical application. These compounds have been shown to be well tolerated in early clinical studies and are steadily advancing into the clinic. Despite these advances, the mechanisms by which O-GlcNAc protects against these various types of neurodegeneration are a topic of continuing interest since improved insight may enable the creation of more targeted strategies to modulate O-GlcNAc for therapeutic benefit. Relevant pathways on which O-GlcNAc has been found to exert beneficial effects include autophagy, necroptosis, and processing of the amyloid precursor protein. More recently, the development and application of chemical methods enabling the synthesis of homogenous proteins have clarified the biochemical effects of O-GlcNAc on protein aggregation and uncovered new roles for O-GlcNAc in heat shock response. Here, we discuss the features of O-GlcNAc in neurodegenerative diseases, the application of inhibitors to identify the roles of this modification, and the biochemical effects of O-GlcNAc on proteins and pathways associated with neurodegeneration.
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Affiliation(s)
- Matthew R Pratt
- Department of Chemistry and Department of Biological Sciences, University of Southern California, Los Angeles, California, USA.
| | - David J Vocadlo
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, Canada; Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia, Canada.
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6
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Moon S, Wang B, Ahn BS, Ryu AH, Hard ER, Javed A, Pratt MR. O-GlcNAc Modification Alters the Chaperone Activity of HSP27 Charcot-Marie-Tooth Type 2 (CMT2) Variants in a Mutation-Selective Fashion. ACS Chem Biol 2023; 18:1705-1712. [PMID: 37540114 PMCID: PMC10442854 DOI: 10.1021/acschembio.3c00292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 07/31/2023] [Indexed: 08/05/2023]
Abstract
Increased O-GlcNAc is a common feature of cellular stress, and the upregulation of this dynamic modification is associated with improved survival under these conditions. Likewise, the heat shock proteins are also increased under stress and prevent protein misfolding and aggregation. We previously linked these two phenomena by demonstrating that O-GlcNAc directly increases the chaperone of certain small heat shock proteins, including HSP27. Here, we examine this linkage further by exploring the potential function of O-GlcNAc on mutants of HSP27 that cause a heritable neuropathy called Charcot-Marie-Tooth type 2 (CMT2) disease. Using synthetic protein chemistry, we prepared five of these mutants bearing an O-GlcNAc at the major site of modification. Upon subsequent biochemical analysis of these proteins, we found that O-GlcNAc has different effects, depending on the location of the individual mutants. We believe that this has important implications for O-GlcNAc and other PTMs in the context of polymorphisms or diseases with high levels of protein mutation.
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Affiliation(s)
- Stuart
P. Moon
- Departments
of Chemistry and Biological Sciences, University of Southern
California, Los Angeles, California 90089, United States
| | - Binyou Wang
- Departments
of Chemistry and Biological Sciences, University of Southern
California, Los Angeles, California 90089, United States
| | - Benjamin S. Ahn
- Departments
of Chemistry and Biological Sciences, University of Southern
California, Los Angeles, California 90089, United States
| | - Andrew H. Ryu
- Departments
of Chemistry and Biological Sciences, University of Southern
California, Los Angeles, California 90089, United States
| | - Eldon R. Hard
- Departments
of Chemistry and Biological Sciences, University of Southern
California, Los Angeles, California 90089, United States
| | - Afraah Javed
- Departments
of Chemistry and Biological Sciences, University of Southern
California, Los Angeles, California 90089, United States
| | - Matthew R. Pratt
- Departments
of Chemistry and Biological Sciences, University of Southern
California, Los Angeles, California 90089, United States
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7
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Mukherjee S, Vogl DP, Becker CFW. Site-Specific Glycation of Human Heat Shock Protein (Hsp27) Enhances Its Chaperone Activity. ACS Chem Biol 2023; 18:1760-1771. [PMID: 37449780 PMCID: PMC10442856 DOI: 10.1021/acschembio.3c00214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 07/03/2023] [Indexed: 07/18/2023]
Abstract
Non-enzymatic posttranslational modifications are believed to affect at least 30% of human proteins, commonly termed glycation. Many of these modifications are implicated in various pathological conditions, e.g., cataract, diabetes, neurodegenerative diseases, and cancer. Chemical protein synthesis enables access to full-length proteins carrying site-specific modifications. One such modification, argpyrimidine (Apy), has been detected in human small heat shock protein Hsp27 and closely related proteins in patient-derived tissues. Thus far, studies have looked into only artificial mixtures of Apy modifications, and only one has analyzed Apy188. We were interested in understanding the impact of such individual Apy modifications on five different arginine sites within the crucial N-terminal domain of Hsp27. By combining protein semisynthesis with biochemical assays on semisynthetic Hsp27 analogues with single-point Apy modification at those sites, we have shown how a seemingly minimal modification within this region results in dramatically altered functional attributes.
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Affiliation(s)
- Somnath Mukherjee
- University
of Vienna, Faculty of Chemistry, Institute
of Biological Chemistry, Währinger Strasse 38, 1090 Vienna, Austria
| | - Dominik P. Vogl
- University
of Vienna, Faculty of Chemistry, Institute
of Biological Chemistry, Währinger Strasse 38, 1090 Vienna, Austria
- Vienna
Doctoral School in Chemistry, Währinger Strasse 42, 1090 Vienna, Austria
| | - Christian F. W. Becker
- University
of Vienna, Faculty of Chemistry, Institute
of Biological Chemistry, Währinger Strasse 38, 1090 Vienna, Austria
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8
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Wang B, Moon SP, Cutolo G, Javed A, Ahn BS, Ryu AH, Pratt MR. HSP27 Inhibitory Activity against Caspase-3 Cleavage and Activation by Caspase-9 Is Enhanced by Chaperone O-GlcNAc Modification in Vitro. ACS Chem Biol 2023; 18:1698-1704. [PMID: 37450938 PMCID: PMC10442853 DOI: 10.1021/acschembio.3c00270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 07/07/2023] [Indexed: 07/18/2023]
Abstract
One of the O-GlcNAc modifications is the protection of cells against a variety of stressors that result in cell death. Previous experiments have focused on the overall ability of O-GlcNAc to prevent protein aggregation under stress as well as its ability to affect stress-response signaling pathways. Less attention has been paid to the potential role for O-GlcNAc in the direct inhibition of a major cell-death pathway, apoptosis. Apoptosis involves the sequential activation of caspase proteases, including the transfer of cell-stress information from initiator caspase-9 to effector caspase-3. Cells have multiple mechanisms to slow the apoptotic cascade, including heat shock protein HSP27, which can directly inhibit the activation of caspase-3 by caspase-9. We have previously shown that O-GlcNAc modification increases the chaperone activity of HSP27 against amyloid aggregation, raising the question as to whether this modification may play important roles in other facets of HSP27 biology. Here, we use protein chemistry to generate different versions of O-GlcNAc modified HSP27 and demonstrate that the modification enhances this antiapoptotic function of the chaperone, at least in an in vitro context. These results provide additional molecular insight into how O-GlcNAc functions as a mediator of cellular stress with important implications for human diseases like cancer and neurodegeneration.
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Affiliation(s)
- Binyou Wang
- Department
of Chemistry and Biological Sciences, University of Southern
California, Los Angeles, California 90089, United States
| | - Stuart P. Moon
- Department
of Chemistry and Biological Sciences, University of Southern
California, Los Angeles, California 90089, United States
| | - Giuliano Cutolo
- Department
of Chemistry and Biological Sciences, University of Southern
California, Los Angeles, California 90089, United States
| | - Afraah Javed
- Department
of Chemistry and Biological Sciences, University of Southern
California, Los Angeles, California 90089, United States
| | - Benjamin S. Ahn
- Department
of Chemistry and Biological Sciences, University of Southern
California, Los Angeles, California 90089, United States
| | - Andrew H. Ryu
- Department
of Chemistry and Biological Sciences, University of Southern
California, Los Angeles, California 90089, United States
| | - Matthew R. Pratt
- Department
of Chemistry and Biological Sciences, University of Southern
California, Los Angeles, California 90089, United States
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9
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Franco JC, Nogueira MLC, Gandelini GM, Pinheiro GMS, Gonçalves CC, Barbosa LRS, Young JC, Ramos CHI. Sorghum bicolor SbHSP110 has an elongated shape and is able of protecting against aggregation and replacing human HSPH1/HSP110 in refolding and disaggregation assays. Biopolymers 2023; 114:e23532. [PMID: 36825649 DOI: 10.1002/bip.23532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 02/06/2023] [Accepted: 02/08/2023] [Indexed: 02/25/2023]
Abstract
Perturbations in the native structure, often caused by stressing cellular conditions, not only impair protein function but also lead to the formation of aggregates, which can accumulate in the cell leading to harmful effects. Some organisms, such as plants, express the molecular chaperone HSP100 (homologous to HSP104 from yeast), which has the remarkable capacity to disaggregate and reactivate proteins. Recently, studies with animal cells, which lack a canonical HSP100, have identified the involvement of a distinct system composed of HSP70/HSP40 that needs the assistance of HSP110 to efficiently perform protein breakdown. As sessile plants experience stressful conditions more severe than those experienced by animals, we asked whether a plant HSP110 could also play a role in collaborating with HSP70/HSP40 in a system that increases the efficiency of disaggregation. Thus, the gene for a putative HSP110 from the cereal Sorghum bicolor was cloned and the protein, named SbHSP110, purified. For comparison purposes, human HsHSP110 (HSPH1/HSP105) was also purified and investigated in parallel. First, a combination of spectroscopic and hydrodynamic techniques was used for the characterization of the conformation and stability of recombinant SbHSP110, which was produced folded. Second, small-angle X-ray scattering and combined predictors of protein structure indicated that SbHSP110 and HsHSP110 have similar conformations. Then, the chaperone activities, which included protection against aggregation, refolding, and reactivation, were investigated, showing that SbHSP110 and HsHSP110 have similar functional activities. Altogether, the results add to the structure/function relationship study of HSP110s and support the hypothesis that plants have multiple strategies to act upon the reactivation of protein aggregates.
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Affiliation(s)
- Juliana C Franco
- Institute of Chemistry, University of Campinas UNICAMP, Campinas, SP, Brazil
| | - Maria L C Nogueira
- Institute of Chemistry, University of Campinas UNICAMP, Campinas, SP, Brazil
| | | | | | - Conrado C Gonçalves
- Institute of Chemistry, University of Campinas UNICAMP, Campinas, SP, Brazil
| | - Leandro R S Barbosa
- Institute of Physics, University of São Paulo, São Paulo, SP, Brazil.,Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, SP, Brazil
| | - Jason C Young
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
| | - Carlos H I Ramos
- Institute of Chemistry, University of Campinas UNICAMP, Campinas, SP, Brazil.,National Institute of Science & Technology of Structural Biology and Bioimage (INCTBEB), Rio de Janeiro, Brazil
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10
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Abstract
O-linked β-N-acetylglucosamine (O-GlcNAc) is a ubiquitous post-translational modification in mammals, decorating thousands of intracellular proteins. O-GlcNAc cycling is an essential regulator of myriad aspects of cell physiology and is dysregulated in numerous human diseases. Notably, O-GlcNAcylation is abundant in the brain and numerous studies have linked aberrant O-GlcNAc signaling to various neurological conditions. However, the complexity of the nervous system and the dynamic nature of protein O-GlcNAcylation have presented challenges for studying of neuronal O-GlcNAcylation. In this context, chemical approaches have been a particularly valuable complement to conventional cellular, biochemical, and genetic methods to understand O-GlcNAc signaling and to develop future therapeutics. Here we review selected recent examples of how chemical tools have empowered efforts to understand and rationally manipulate O-GlcNAcylation in mammalian neurobiology.
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Affiliation(s)
- Duc Tan Huynh
- Department of Biochemistry, Duke University School of Medicine, Durham, NC 27710, USA
| | - Michael Boyce
- Department of Biochemistry, Duke University School of Medicine, Durham, NC 27710, USA
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11
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Nam MH, Nahomi RB, Pantcheva MB, Dhillon A, Chiodo VA, Smith WC, Nagaraj RH. AAV2-Mediated Expression of HspB1 in RGCs Prevents Somal Damage and Axonal Transport Deficits in a Mouse Model of Ocular Hypertension. Transl Vis Sci Technol 2022; 11:8. [DOI: 10.1167/tvst.11.11.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Mi-Hyun Nam
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA
| | - Rooban B. Nahomi
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA
| | - Mina B. Pantcheva
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA
| | - Armaan Dhillon
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA
| | - Vince A. Chiodo
- Department of Ophthalmology, University of Florida, Gainesville, FL, USA
| | - W. Clay Smith
- Department of Ophthalmology, University of Florida, Gainesville, FL, USA
| | - Ram H. Nagaraj
- Sue Anschutz-Rodgers Eye Center and Department of Ophthalmology, School of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Anschutz Medical Campus, Aurora, CO, USA
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12
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Kiso-Farnè K, Tsuruyama T. Epidermal growth factor receptor cascade prioritizes the maximization of signal transduction. Sci Rep 2022; 12:16950. [PMID: 36216834 PMCID: PMC9550784 DOI: 10.1038/s41598-022-20663-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 09/16/2022] [Indexed: 12/29/2022] Open
Abstract
Many studies have been performed to quantify cell signaling. Cell signaling molecules are phosphorylated in response to extracellular stimuli, with the phosphorylation sequence forming a signal cascade. The information gain during a signal event is given by the logarithm of the phosphorylation molecule ratio. The average information gain can be regarded as the signal transduction quantity (ST), which is identical to the Kullback-Leibler divergence (KLD), a relative entropy. We previously reported that if the total ST value in a given signal cascade is maximized, the ST rate (STR) of each signaling molecule per signal duration (min) approaches a constant value. To experimentally verify this theoretical conclusion, we measured the STR of the epidermal growth factor (EGF)-related cascade in A431 skin cancer cells following stimulation with EGF using antibody microarrays against phosphorylated signal molecules. The results were consistent with those from the theoretical analysis. Thus, signaling transduction systems may adopt a strategy that prioritizes the maximization of ST. Furthermore, signal molecules with similar STRs may form a signal cascade. In conclusion, ST and STR are promising properties for quantitative analysis of signal transduction.
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Affiliation(s)
- Kaori Kiso-Farnè
- grid.258799.80000 0004 0372 2033Center for anatomical, pathological, and forensic medical researches, Graduate School of Medicine, Kyoto University, Kyoto, 606-8501 Japan
| | - Tatsuaki Tsuruyama
- grid.258799.80000 0004 0372 2033Center for anatomical, pathological, and forensic medical researches, Graduate School of Medicine, Kyoto University, Kyoto, 606-8501 Japan ,grid.258799.80000 0004 0372 2033Drug and Discovery Medicine, Graduate School of Medicine, Medical Innovation Center, Kyoto University, Kyoto, 606-8507 Japan ,grid.69566.3a0000 0001 2248 6943Department of Physics, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku 6-3, Sendai, 980-8578 Japan ,grid.418889.40000 0001 2198 115XDepartment of Molecular Biosciences, Radiation Effects Research Foundation, Minami-ku, Hiroshima, 732-0815 Japan ,grid.415392.80000 0004 0378 7849Department of Tumor Research, Kitano Hospital, The Tazuke Kofukai Medical Research Institute, Kita-ku, Osaka, 530-8480 Japan
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13
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Asgharzadeh F, Moradi-Marjaneh R, Marjaneh MM. The Role of Heat Shock Protein 27 in Carcinogenesis and Treatment of Colorectal Cancer. Curr Pharm Des 2022; 28:2677-2685. [PMID: 35490324 DOI: 10.2174/1381612828666220427140640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 03/10/2022] [Indexed: 12/16/2022]
Abstract
The incidence of colorectal cancer (CRC) has significantly increased in recent decades, which has made this disease an important global health issue. Despite many efforts, there is no useful prognostic or diagnostic biomarker for CRC. Heat shock protein 27 (Hsp27) is one of the most studied members of the Hsp family. It has attracted particular attention in CRC pathogenesis since it is involved in fundamental cell functions for cell survival. Evidence shows that Hsp27 plays important role in CRC progression and metastasis. Hsp27 overexpression has been observed in CRC and is suggested to be associated with CRC's poor prognosis. In the present review, we focus on the current knowledge of the role of Hsp27 in CRC carcinogenesis and the underlying mechanisms. In addition, we discuss the value of targeting Hsp27 in CRC treatment.
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Affiliation(s)
- Fereshteh Asgharzadeh
- Department of Physiology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Reyhaneh Moradi-Marjaneh
- Department of Physiology, School of Paramedical Sciences, Torbat Heydariyeh University of Medical Sciences, Torbat Heydariyeh, Iran
| | - Mahdi Moradi Marjaneh
- Department of Infectious Disease, Faculty of Medicine, Imperial College London, London, United Kingdom
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14
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Zhang S, Zhu Y, Lu J, Liu Z, Lobato AG, Zeng W, Liu J, Qiang J, Zeng S, Zhang Y, Liu C, Liu J, He Z, Zhai RG, Li D. Specific binding of Hsp27 and phosphorylated Tau mitigates abnormal Tau aggregation-induced pathology. eLife 2022; 11:79898. [PMID: 36048712 PMCID: PMC9436411 DOI: 10.7554/elife.79898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 08/17/2022] [Indexed: 11/13/2022] Open
Abstract
Amyloid aggregation of phosphorylated Tau (pTau) into neurofibrillary tangles is closely associated with Alzheimer's disease (AD). Several molecular chaperones have been reported to bind Tau and impede its pathological aggregation. Recent findings of elevated levels of Hsp27 in the brains of patients with AD suggested its important role in pTau pathology. However, the molecular mechanism of Hsp27 in pTau aggregation remains poorly understood. Here, we show that Hsp27 partially co-localizes with pTau tangles in the brains of patients with AD. Notably, phosphorylation of Tau by microtubule affinity regulating kinase 2 (MARK2), dramatically enhances the binding affinity of Hsp27 to Tau. Moreover, Hsp27 efficiently prevents pTau fibrillation in vitro and mitigates neuropathology of pTau aggregation in a Drosophila tauopathy model. Further mechanistic study reveals that Hsp27 employs its N-terminal domain to directly interact with multiple phosphorylation sites of pTau for specific binding. Our work provides the structural basis for the specific recognition of Hsp27 to pathogenic pTau, and highlights the important role of Hsp27 in preventing abnormal aggregation and pathology of pTau in AD.
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Affiliation(s)
- Shengnan Zhang
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China
| | - Yi Zhu
- Department of Molecular and Cellular Pharmacology, University of Miami Miller School of Medicine, Miami, United States
| | - Jinxia Lu
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai, China
| | - Zhenying Liu
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China.,University of the Chinese Academy of Sciences, Beijing, China
| | - Amanda G Lobato
- Department of Molecular and Cellular Pharmacology, University of Miami Miller School of Medicine, Miami, United States.,Graduate Program in Human Genetics and Genomics, University of Miami Miller School of Medicine, Miami, United States
| | - Wen Zeng
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China.,University of the Chinese Academy of Sciences, Beijing, China
| | - Jiaqi Liu
- Department of Molecular and Cellular Pharmacology, University of Miami Miller School of Medicine, Miami, United States.,Graduate Program in Molecular and Cellular Pharmacology, University of Miami Miller School of Medicine, Miami, United States
| | - Jiali Qiang
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China
| | - Shuyi Zeng
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai, China
| | - Yaoyang Zhang
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China
| | - Cong Liu
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China
| | - Jun Liu
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhuohao He
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, China
| | - R Grace Zhai
- Department of Molecular and Cellular Pharmacology, University of Miami Miller School of Medicine, Miami, United States
| | - Dan Li
- Bio-X Institutes, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai, China.,Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, Shanghai, China
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15
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Yerabandi N, Kouznetsova VL, Kesari S, Tsigelny IF. The role of BAG3 in dilated cardiomyopathy and its association with Charcot-Marie-Tooth disease type 2. ACTA MYOLOGICA : MYOPATHIES AND CARDIOMYOPATHIES : OFFICIAL JOURNAL OF THE MEDITERRANEAN SOCIETY OF MYOLOGY 2022; 41:59-75. [PMID: 35832504 PMCID: PMC9237749 DOI: 10.36185/2532-1900-071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 06/13/2022] [Indexed: 11/03/2022]
Abstract
Bcl2-associated athanogene 3 (BAG3) is a multifunctional cochaperone responsible for protein quality control within cells. BAG3 interacts with chaperones HSPB8 and Hsp70 to transport misfolded proteins to the Microtubule Organizing Center (MTOC) and degrade them in autophagosomes in a process known as Chaperone Assisted Selective Autophagy (CASA). Mutations in the second conserved IPV motif of BAG3 are known to cause Dilated Cardiomyopathy (DCM) by inhibiting adequate removal of non-native proteins. The proline 209 to leucine (P209L) BAG3 mutant in particular causes the aggregation of BAG3 and misfolded proteins as well as the sequestration of essential chaperones. The exact mechanisms of protein aggregation in DCM are unknown. However, the similar presence of insoluble protein aggregates in Charcot-Marie-Tooth disease type 2 (CMT2) induced by the proline 182 to leucine (P182L) HSPB1 mutant points to a possible avenue for future research: IPV motif. In this review, we summarize the molecular mechanisms of CASA and the currently known pathological effects of mutated BAG3 in DCM. Additionally, we will provide insight on the importance of the IPV motif in protein aggregation by analyzing a potential association between DCM and CMT2.
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Affiliation(s)
- Nitya Yerabandi
- REHS program, San Diego Supercomputer Center, University of California, San Diego, CA, USA
| | - Valentina L. Kouznetsova
- San Diego Supercomputer Center, University of California, San Diego, CA, USA,Biana, La Jolla, CA, USA
| | | | - Igor F. Tsigelny
- Correspondence Igor F. Tsigelny Department of Neurosciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0505, USA. E-mail:
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16
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Selig EE, Lynn RJ, Zlatic CO, Mok YF, Ecroyd H, Gooley PR, Griffin MDW. The Monomeric α-Crystallin Domain of the Small Heat-shock Proteins αB-crystallin and Hsp27 Binds Amyloid Fibril Ends. J Mol Biol 2022; 434:167711. [PMID: 35777462 DOI: 10.1016/j.jmb.2022.167711] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 06/05/2022] [Accepted: 06/25/2022] [Indexed: 11/25/2022]
Abstract
Small heat-shock proteins (sHSPs) are ubiquitously expressed molecular chaperones present in all kingdoms of life that inhibit protein misfolding and aggregation. Despite their importance in proteostasis, the structure-function relationships of sHSPs remain elusive. Human sHSPs are characterised by a central, highly conserved α-crystallin domain (ACD) and variable-length N- and C-terminal regions. The ACD forms antiparallel homodimers via an extended β-strand, creating a shared β-sheet at the dimer interface. The N- and C-terminal regions mediate formation of higher order oligomers that are thought to act as storage forms for chaperone-active dimers. We investigated the interactions of the ACD of two human sHSPs, αB-crystallin (αB-C) and Hsp27, with apolipoprotein C-II amyloid fibrils using analytical ultracentrifugation and nuclear magnetic resonance spectroscopy. The ACD was found to interact transiently with amyloid fibrils to inhibit fibril elongation and naturally occurring fibril end-to-end joining. This interaction was sensitive to the concentration of fibril ends indicating a 'fibril-capping' interaction. Furthermore, resonances arising from the ACD monomer were attenuated to a greater extent than those of the ACD dimer in the presence of fibrils, suggesting that the monomer may bind fibrils. This hypothesis was supported by mutagenesis studies in which disulfide cross-linked ACD dimers formed by both αB-C and Hsp27 were less effective at inhibiting amyloid fibril elongation and fibril end-to-end joining than ACD constructs lacking disulfide cross-linking. Our results indicate that sHSP monomers inhibit amyloid fibril elongation, highlighting the importance of the dynamic oligomeric nature of sHSPs for client binding.
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Affiliation(s)
- Emily E Selig
- Department of Biochemistry and Pharmacology, University of Melbourne, Parkville, Victoria 3010, Australia; Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria 3010, Australia.
| | - Roberta J Lynn
- Department of Biochemistry and Pharmacology, University of Melbourne, Parkville, Victoria 3010, Australia; Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria 3010, Australia.
| | - Courtney O Zlatic
- Department of Biochemistry and Pharmacology, University of Melbourne, Parkville, Victoria 3010, Australia; Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria 3010, Australia.
| | - Yee-Foong Mok
- Department of Biochemistry and Pharmacology, University of Melbourne, Parkville, Victoria 3010, Australia; Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria 3010, Australia.
| | - Heath Ecroyd
- Molecular Horizons and School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, NSW 2522, Australia; Illawarra Health and Medical Research Institute, Wollongong, NSW 2522, Australia.
| | - Paul R Gooley
- Department of Biochemistry and Pharmacology, University of Melbourne, Parkville, Victoria 3010, Australia; Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria 3010, Australia.
| | - Michael D W Griffin
- Department of Biochemistry and Pharmacology, University of Melbourne, Parkville, Victoria 3010, Australia; Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria 3010, Australia.
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17
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Xu L, Xu N, Wang L, Qian H, Li Y, Fang M, Xiang Z, Lin W, Zhang F, Shao Q, Bernards MT, Shi Y, He Y, Chen S. Spontaneously Restoring Specific Bioaffinity of RGD in Linear RGD-containing Peptides by Conjugation with Zwitterionic Dendrimers. Acta Biomater 2022; 148:61-72. [PMID: 35728789 DOI: 10.1016/j.actbio.2022.06.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 05/30/2022] [Accepted: 06/10/2022] [Indexed: 11/01/2022]
Abstract
Peptides are more versatile than small molecule drugs, but their specific bioaffinities are usually lower than their original native proteins because of the loss of preferred conformations. To overcome this key obstacle, we demonstrated a hydrogen bond-induced conformational constraint method to enhance the specific bioaffinities of peptides to achieve a high success rate by using linear RGD-containing peptides as a model of bioactive peptides. By performing molecular simulation, we found that the chemically immobilized linear CRGDS via cysteine (C) at the N-terminus on zwitterionic PAMAM G-5 can not only spontaneously restore the natural conformation of the RGD segment through the assistance of the dynamic hydrogen bond from serine (S) at the C-terminus of the peptide, but it can also narrow the distribution of all possible conformations. Consequently, the conjugates showed comparable or even better high affinity than native proteins without the use of conventional, labor-intensive, synthesis-based structure search methods to construct a binding conformation. In addition, the conjugates showed globular protein-like characteristics chemically, physically, and physiologically. They exhibited not only high efficacy and biosafety both in vitro and in vivo, but they also showed extremely high thermostability even upon boiling in a solution. This approach offers great design flexibility for reviving functional peptides without impairing their high specific affinity for their targets. STATEMENT OF SIGNIFICANCE: : In this work, we developed a swift approach to spontaneously restore the natural conformation of a linear peptide from a nature protein and thus enhance its specific bioaffinity instead of constructing a binding conformation by the labor-intensive, synthesis-based structure search method. In details, our new approach involves dynamically constraining the linear peptide on a zwitterionic PAMAM G-5 surface by a combination of chemical bonding at one terminus and dynamic hydrogen bonding at the other terminus of the linear peptide. The zwitterionic background offers abundant interaction sites for hydrogen bonding as well as resistance to nonspecific interactions. This approach fully restores the specific bioaffinity of RGD segments on a zwitterionic PAMAM G-5 through only one conjugation point at the C-terminus of the peptide. Moreover, the bioaffinity of all three types of RGD-containing peptides is successfully restored, which indicates the high rate of success of this approach in affinity restoring.
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Affiliation(s)
- Liangbo Xu
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education and Zhejiang Key Laboratory of Smart Biomaterials, Zhejiang University, Hangzhou, 310027, China
| | - Nan Xu
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education and Zhejiang Key Laboratory of Smart Biomaterials, Zhejiang University, Hangzhou, 310027, China; Institute of Zhejiang University-Quzhou, Quzhou, 324000 China
| | - Longgang Wang
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education and Zhejiang Key Laboratory of Smart Biomaterials, Zhejiang University, Hangzhou, 310027, China
| | - Haofeng Qian
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education and Zhejiang Key Laboratory of Smart Biomaterials, Zhejiang University, Hangzhou, 310027, China
| | - Yihan Li
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education and Zhejiang Key Laboratory of Smart Biomaterials, Zhejiang University, Hangzhou, 310027, China
| | - Mandi Fang
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education and Zhejiang Key Laboratory of Smart Biomaterials, Zhejiang University, Hangzhou, 310027, China
| | - Ziyin Xiang
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education and Zhejiang Key Laboratory of Smart Biomaterials, Zhejiang University, Hangzhou, 310027, China
| | - Weifeng Lin
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education and Zhejiang Key Laboratory of Smart Biomaterials, Zhejiang University, Hangzhou, 310027, China
| | - Fanxing Zhang
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education and Zhejiang Key Laboratory of Smart Biomaterials, Zhejiang University, Hangzhou, 310027, China
| | - Qing Shao
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington 40506, USA
| | - Matthew T Bernards
- Department of Chemical and Biological Engineering, University of Idaho, Moscow 83844, USA
| | - Yao Shi
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education and Zhejiang Key Laboratory of Smart Biomaterials, Zhejiang University, Hangzhou, 310027, China
| | - Yi He
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education and Zhejiang Key Laboratory of Smart Biomaterials, Zhejiang University, Hangzhou, 310027, China; Institute of Zhejiang University-Quzhou, Quzhou, 324000 China; Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, USA.
| | - Shengfu Chen
- College of Chemical and Biological Engineering, Key Laboratory of Biomass Chemical Engineering of Ministry of Education and Zhejiang Key Laboratory of Smart Biomaterials, Zhejiang University, Hangzhou, 310027, China; Institute of Zhejiang University-Quzhou, Quzhou, 324000 China.
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18
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He W, Li X, Xue H, Yang Y, Mencius J, Bai L, Zhang J, Xu J, Wu B, Xue Y, Quan S. Insights into the client protein release mechanism of the ATP-independent chaperone Spy. Nat Commun 2022; 13:2818. [PMID: 35595811 PMCID: PMC9122904 DOI: 10.1038/s41467-022-30499-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 04/22/2022] [Indexed: 11/09/2022] Open
Abstract
Molecular chaperones play a central role in regulating protein homeostasis, and their active forms often contain intrinsically disordered regions (IDRs). However, how IDRs impact chaperone action remains poorly understood. Here, we discover that the disordered N terminus of the prototype chaperone Spy facilitates client release. With NMR spectroscopy and molecular dynamics simulations, we find that the N terminus can bind transiently to the client-binding cavity of Spy primarily through electrostatic interactions mediated by the N-terminal D26 residue. This intramolecular interaction results in a dynamic competition of the N terminus with the client for binding to Spy, which promotes client discharge. Our results reveal the mechanism by which Spy releases clients independent of energy input, thus enriching the current knowledge on how ATP-independent chaperones release their clients and highlighting the importance of synergy between IDRs and structural domains in regulating protein function.
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Affiliation(s)
- Wei He
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai Collaborative Innovation Center for Biomanufacturing (SCICB), Shanghai, 200237, China
| | - Xinming Li
- School of Life Sciences, Tsinghua-Peking Joint Center for Life Sciences, Beijing Advanced Innovation Center for Structural Biology, Tsinghua University, 100084, Beijing, China
| | - Hongjuan Xue
- National Facility for Protein Science in Shanghai, ZhangJiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, China
| | - Yuanyuan Yang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai Collaborative Innovation Center for Biomanufacturing (SCICB), Shanghai, 200237, China
| | - Jun Mencius
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai Collaborative Innovation Center for Biomanufacturing (SCICB), Shanghai, 200237, China
| | - Ling Bai
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai Collaborative Innovation Center for Biomanufacturing (SCICB), Shanghai, 200237, China
| | - Jiayin Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai Collaborative Innovation Center for Biomanufacturing (SCICB), Shanghai, 200237, China
| | - Jianhe Xu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai Collaborative Innovation Center for Biomanufacturing (SCICB), Shanghai, 200237, China
| | - Bin Wu
- National Facility for Protein Science in Shanghai, ZhangJiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, China.
| | - Yi Xue
- School of Life Sciences, Tsinghua-Peking Joint Center for Life Sciences, Beijing Advanced Innovation Center for Structural Biology, Tsinghua University, 100084, Beijing, China.
| | - Shu Quan
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai Collaborative Innovation Center for Biomanufacturing (SCICB), Shanghai, 200237, China. .,Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism, East China University of Science and Technology, Shanghai, 200237, China.
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19
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Kulkarni SS, Watson EE, Maxwell JWC, Niederacher G, Johansen‐Leete J, Huhmann S, Mukherjee S, Norman AR, Kriegesmann J, Becker CFW, Payne RJ. Expressed Protein Selenoester Ligation. ANGEWANDTE CHEMIE (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 134:e202200163. [PMID: 38505698 PMCID: PMC10947028 DOI: 10.1002/ange.202200163] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Indexed: 03/21/2024]
Abstract
Herein, we describe the development and application of a novel expressed protein selenoester ligation (EPSL) methodology for the one-pot semi-synthesis of modified proteins. EPSL harnesses the rapid kinetics of ligation reactions between modified synthetic selenopeptides and protein aryl selenoesters (generated from expressed intein fusion precursors) followed by in situ chemoselective deselenization to afford target proteins at concentrations that preclude the use of traditional ligation methods. The utility of the EPSL technology is showcased through the efficient semi-synthesis of ubiquitinated polypeptides, lipidated analogues of the membrane-associated GTPase YPT6, and site-specifically phosphorylated variants of the oligomeric chaperone protein Hsp27 at high dilution.
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Affiliation(s)
- Sameer S. Kulkarni
- School of Chemistry and Australian Research Council Centre of Excellence for Innovations in Peptide and Protein ScienceThe University of SydneySydneyNSW 2006Australia
| | - Emma E. Watson
- School of Chemistry and Australian Research Council Centre of Excellence for Innovations in Peptide and Protein ScienceThe University of SydneySydneyNSW 2006Australia
| | - Joshua W. C. Maxwell
- School of Chemistry and Australian Research Council Centre of Excellence for Innovations in Peptide and Protein ScienceThe University of SydneySydneyNSW 2006Australia
| | - Gerhard Niederacher
- Faculty of Chemistry, Institute of Biological ChemistryUniversity of ViennaViennaAustria
| | - Jason Johansen‐Leete
- School of Chemistry and Australian Research Council Centre of Excellence for Innovations in Peptide and Protein ScienceThe University of SydneySydneyNSW 2006Australia
| | - Susanne Huhmann
- Faculty of Chemistry, Institute of Biological ChemistryUniversity of ViennaViennaAustria
| | - Somnath Mukherjee
- Faculty of Chemistry, Institute of Biological ChemistryUniversity of ViennaViennaAustria
| | - Alexander R. Norman
- School of Chemistry and Australian Research Council Centre of Excellence for Innovations in Peptide and Protein ScienceThe University of SydneySydneyNSW 2006Australia
| | - Julia Kriegesmann
- Faculty of Chemistry, Institute of Biological ChemistryUniversity of ViennaViennaAustria
| | - Christian F. W. Becker
- Faculty of Chemistry, Institute of Biological ChemistryUniversity of ViennaViennaAustria
| | - Richard J. Payne
- School of Chemistry and Australian Research Council Centre of Excellence for Innovations in Peptide and Protein ScienceThe University of SydneySydneyNSW 2006Australia
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20
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Kulkarni SS, Watson EE, Maxwell JWC, Niederacher G, Johansen-Leete J, Huhmann S, Mukherjee S, Norman AR, Kriegesmann J, Becker CFW, Payne RJ. Expressed Protein Selenoester Ligation. Angew Chem Int Ed Engl 2022; 61:e202200163. [PMID: 35194928 PMCID: PMC9314092 DOI: 10.1002/anie.202200163] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Indexed: 12/23/2022]
Abstract
Herein, we describe the development and application of a novel expressed protein selenoester ligation (EPSL) methodology for the one‐pot semi‐synthesis of modified proteins. EPSL harnesses the rapid kinetics of ligation reactions between modified synthetic selenopeptides and protein aryl selenoesters (generated from expressed intein fusion precursors) followed by in situ chemoselective deselenization to afford target proteins at concentrations that preclude the use of traditional ligation methods. The utility of the EPSL technology is showcased through the efficient semi‐synthesis of ubiquitinated polypeptides, lipidated analogues of the membrane‐associated GTPase YPT6, and site‐specifically phosphorylated variants of the oligomeric chaperone protein Hsp27 at high dilution.
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Affiliation(s)
- Sameer S Kulkarni
- School of Chemistry and Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Sydney, Sydney, NSW 2006, Australia
| | - Emma E Watson
- School of Chemistry and Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Sydney, Sydney, NSW 2006, Australia
| | - Joshua W C Maxwell
- School of Chemistry and Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Sydney, Sydney, NSW 2006, Australia
| | - Gerhard Niederacher
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna, Vienna, Austria
| | - Jason Johansen-Leete
- School of Chemistry and Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Sydney, Sydney, NSW 2006, Australia
| | - Susanne Huhmann
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna, Vienna, Austria
| | - Somnath Mukherjee
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna, Vienna, Austria
| | - Alexander R Norman
- School of Chemistry and Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Sydney, Sydney, NSW 2006, Australia
| | - Julia Kriegesmann
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna, Vienna, Austria
| | - Christian F W Becker
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna, Vienna, Austria
| | - Richard J Payne
- School of Chemistry and Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Sydney, Sydney, NSW 2006, Australia
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21
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Fan Y, Murgia M, Linder MI, Mizoguchi Y, Wang C, Łyszkiewicz M, Ziȩtara N, Liu Y, Frenz S, Sciuccati G, Partida-Gaytan A, Alizadeh Z, Rezaei N, Rehling P, Dennerlein S, Mann M, Klein C. HAX1-dependent control of mitochondrial proteostasis governs neutrophil granulocyte differentiation. J Clin Invest 2022; 132:153153. [PMID: 35499078 PMCID: PMC9057593 DOI: 10.1172/jci153153] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 03/10/2022] [Indexed: 01/18/2023] Open
Abstract
The relevance of molecular mechanisms governing mitochondrial proteostasis to the differentiation and function of hematopoietic and immune cells is largely elusive. Through dissection of the network of proteins related to HCLS1-associated protein X-1, we defined a potentially novel functional CLPB/HAX1/(PRKD2)/HSP27 axis with critical importance for the differentiation of neutrophil granulocytes and, thus, elucidated molecular and metabolic mechanisms underlying congenital neutropenia in patients with HAX1 deficiency as well as bi- and monoallelic mutations in CLPB. As shown by stable isotope labeling by amino acids in cell culture (SILAC) proteomics, CLPB and HAX1 control the balance of mitochondrial protein synthesis and persistence crucial for proper mitochondrial function. Impaired mitochondrial protein dynamics are associated with decreased abundance of the serine-threonine kinase PRKD2 and HSP27 phosphorylated on serines 78 and 82. Cellular defects in HAX1–/– cells can be functionally reconstituted by HSP27. Thus, mitochondrial proteostasis emerges as a critical molecular and metabolic mechanism governing the differentiation and function of neutrophil granulocytes.
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Affiliation(s)
- Yanxin Fan
- Department of Pediatrics, Dr. von Hauner Children’s Hospital and Gene Center, University Hospital, Ludwig-Maximilians-Universität (LMU), Munich, Germany
| | - Marta Murgia
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
- Department of Biomedical Sciences, University of Padua, Padua, Italy
| | - Monika I. Linder
- Department of Pediatrics, Dr. von Hauner Children’s Hospital and Gene Center, University Hospital, Ludwig-Maximilians-Universität (LMU), Munich, Germany
| | - Yoko Mizoguchi
- Department of Pediatrics, Dr. von Hauner Children’s Hospital and Gene Center, University Hospital, Ludwig-Maximilians-Universität (LMU), Munich, Germany
| | - Cong Wang
- Department of Cellular Biochemistry, University Medical Center Goettingen, Goettingen, Germany
| | - Marcin Łyszkiewicz
- Department of Pediatrics, Dr. von Hauner Children’s Hospital and Gene Center, University Hospital, Ludwig-Maximilians-Universität (LMU), Munich, Germany
| | - Natalia Ziȩtara
- Department of Pediatrics, Dr. von Hauner Children’s Hospital and Gene Center, University Hospital, Ludwig-Maximilians-Universität (LMU), Munich, Germany
| | - Yanshan Liu
- Department of Pediatrics, Dr. von Hauner Children’s Hospital and Gene Center, University Hospital, Ludwig-Maximilians-Universität (LMU), Munich, Germany
| | - Stephanie Frenz
- Department of Pediatrics, Dr. von Hauner Children’s Hospital and Gene Center, University Hospital, Ludwig-Maximilians-Universität (LMU), Munich, Germany
| | - Gabriela Sciuccati
- Hematology and Oncology Department, Hospital de Pediatria “Prof. Dr. J.P. Garrahan,” Buenos Aires, Argentina
| | - Armando Partida-Gaytan
- Unidad de Investigación en Inmunodeficiencias Primarias, Instituto Nacional de Pediatría, Mexico City, Mexico
| | | | - Nima Rezaei
- Research Center for Immunodeficiencies, Children’s Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Peter Rehling
- Department of Cellular Biochemistry, University Medical Center Goettingen, Goettingen, Germany
- Cluster of Excellence “Multiscale Bioimaging: From Molecular Machines to Networks of Excitable Cells,” University of Goettingen, Goettingen, Germany
- Max Planck Institute for Biophysical Chemistry, Goettingen, Germany
| | - Sven Dennerlein
- Department of Cellular Biochemistry, University Medical Center Goettingen, Goettingen, Germany
| | - Matthias Mann
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Christoph Klein
- Department of Pediatrics, Dr. von Hauner Children’s Hospital and Gene Center, University Hospital, Ludwig-Maximilians-Universität (LMU), Munich, Germany
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22
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Ginsenoside Rf inhibits human tau proteotoxicity and causes specific LncRNA, miRNA and mRNA expression changes in Caenorhabditis elegans model of tauopathy. Eur J Pharmacol 2022; 922:174887. [DOI: 10.1016/j.ejphar.2022.174887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 02/10/2022] [Accepted: 03/09/2022] [Indexed: 11/24/2022]
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23
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Macromolecular structures and proteins interacting with the microtubule associated tau protein. Neuroscience 2022; 518:70-82. [PMID: 35609757 DOI: 10.1016/j.neuroscience.2022.05.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 04/28/2022] [Accepted: 05/17/2022] [Indexed: 12/25/2022]
Abstract
It is well established that neurodegenerative diseases known as tauopathies are characterized by the presence of filamentous forms of phosphorylated tau protein inside neurons. However, the causal relationship between the initial symptoms of a particular disease and the molecular events affecting tau and leading to the appearance of tangles of filamentous forms of this protein remains unknown. Even the main function (or functions) of tau inside neurons is debatable and controversial. Tau seems to be a multifunctional protein. I review here some of the most studied interactions of tau with different macromolecules and proteins, which can be classified according to the structural o functional unit within which the interaction works: Microtubule, Nuclear localization and DNA, Synaptic activity, RNA metabolism, Fats transport, Proteostasis, Amyloid Cascade Hypothesis, Mitochondria and Phosphorylation. Although this seems to be a broad spectrum of tau functions, interactome studies of tau reveal hundreds of plausible partners of tau, suggesting that it engages in an extensive network of interconnected regulatory interactions by means of its high capability to interact with all kinds of proteins and complex structures, combined with its vast number of post-translational modifications. I include also some thermodynamic data concerning the interaction of tau with some partners.
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24
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Rajeswaren V, Wong JO, Yabroudi D, Nahomi RB, Rankenberg J, Nam MH, Nagaraj RH. Small Heat Shock Proteins in Retinal Diseases. Front Mol Biosci 2022; 9:860375. [PMID: 35480891 PMCID: PMC9035800 DOI: 10.3389/fmolb.2022.860375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 03/11/2022] [Indexed: 11/29/2022] Open
Abstract
This review summarizes the latest findings on small heat shock proteins (sHsps) in three major retinal diseases: glaucoma, diabetic retinopathy, and age-related macular degeneration. A general description of the structure and major cellular functions of sHsps is provided in the introductory remarks. Their role in specific retinal diseases, highlighting their regulation, role in pathogenesis, and possible use as therapeutics, is discussed.
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Affiliation(s)
- Vivian Rajeswaren
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
| | - Jeffrey O. Wong
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
| | - Dana Yabroudi
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
| | - Rooban B. Nahomi
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
| | - Johanna Rankenberg
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
| | - Mi-Hyun Nam
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
- *Correspondence: Mi-Hyun Nam, ; Ram H. Nagaraj,
| | - Ram H. Nagaraj
- Department of Ophthalmology, Sue Anschutz-Rodgers Eye Center, School of Medicine, Aurora, CO, United States
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado, Aurora, CO, United States
- *Correspondence: Mi-Hyun Nam, ; Ram H. Nagaraj,
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25
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Holguin BA, Hildenbrand ZL, Bernal RA. Insights Into the Role of Heat Shock Protein 27 in the Development of Neurodegeneration. Front Mol Neurosci 2022; 15:868089. [PMID: 35431800 PMCID: PMC9005852 DOI: 10.3389/fnmol.2022.868089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 03/09/2022] [Indexed: 12/11/2022] Open
Abstract
Small heat shock protein 27 is a critically important chaperone, that plays a key role in several essential and varied physiological processes. These include thermotolerance, apoptosis, cytoskeletal dynamics, cell differentiation, protein folding, among others. Despite its relatively small size and intrinsically disordered termini, it forms large and polydisperse oligomers that are in equilibrium with dimers. This equilibrium is driven by transient interactions between the N-terminal region, the α-crystallin domain, and the C-terminal region. The continuous redistribution of binding partners results in a conformationally dynamic protein that allows it to adapt to different functions where substrate capture is required. However, the intrinsic disorder of the amino and carboxy terminal regions and subsequent conformational variability has made structural investigations challenging. Because heat shock protein 27 is critical for so many key cellular functions, it is not surprising that it also has been linked to human disease. Charcot-Marie-Tooth and distal hereditary motor neuropathy are examples of neurodegenerative disorders that arise from single point mutations in heat shock protein 27. The development of possible treatments, however, depends on our understanding of its normal function at the molecular level so we might be able to understand how mutations manifest as disease. This review will summarize recent reports describing investigations into the structurally elusive regions of Hsp27. Recent insights begin to provide the required context to explain the relationship between a mutation and the resulting loss or gain of function that leads to Charcot-Marie Tooth disease and distal hereditary motor neuropathy.
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26
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Du J, Tao Q, Liu Y, Huang Z, Jin H, Lin W, Huang X, Zeng J, Zhao Y, Liu L, Xu Q, Han X, Chen L, Chen XL, Wen Y. Assessment of the targeted effect of Sijunzi decoction on the colorectal cancer microenvironment via the ESTIMATE algorithm. PLoS One 2022; 17:e0264720. [PMID: 35303006 PMCID: PMC8932555 DOI: 10.1371/journal.pone.0264720] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 02/15/2022] [Indexed: 11/18/2022] Open
Abstract
Objective Sijunzi decoction (SJZD) was used to treat patients with colorectal cancer (CRC) as an adjuvant method. The aim of the study was to investigate the therapeutic targets and pathways of SJZD towards the tumor microenvironment of CRC via network pharmacology and the ESTIMATE algorithm. Methods The ESTIMATE algorithm was used to calculate immune and stromal scores to predict the level of infiltrating immune and stromal cells. The active targets of SJZD were searched in the Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform (TCMSP) and UniProt database. The core targets were obtained by matching the differentially expressed genes in CRC tissues and the targets of SJZD. Then, GO, KEGG and validation in TCGA were carried out. Results According to the ESTIMATE algorithm and survival analysis, the median survival time of the low stromal score group was significantly higher than that of the high stromal score group (P = 0.018), while the patients showed no significant difference of OS between different immune groups (P = 0.19). A total of 929 genes were upregulated and 115 genes were downregulated between the stromal score groups (|logFC| > 2, adjusted P < 0.05); 357 genes were upregulated and 472 genes were downregulated between the immune score groups. The component-target network included 139 active components and 52 related targets. The core targets were HSPB1, SPP1, IGFBP3, and TGFB1, which were significantly associated with poor prognosis in TCGA validation. GO terms included the response to hypoxia, the extracellular space, protein binding and the TNF signaling pathway. Immunoreaction was the main enriched pathway identified by KEGG analysis. Conclusion The core genes (HSPB1, SPP1, IGFBP3 and TGFB1) affected CRC development and prognosis by regulating hypoxia, protein binding and epithelial-mesenchymal transition in the extracellular matrix.
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Affiliation(s)
- Jiaxin Du
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Quyuan Tao
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Ying Liu
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Zhanming Huang
- The First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - He Jin
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Wenjia Lin
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xinying Huang
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jingyan Zeng
- Shenzhen Clinical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yongchang Zhao
- The First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Lingyu Liu
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Qian Xu
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xue Han
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Lixia Chen
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xin-lin Chen
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou, China
- * E-mail: (XC); (YW)
| | - Yi Wen
- The First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China
- * E-mail: (XC); (YW)
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27
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Ryder BD, Wydorski PM, Hou Z, Joachimiak LA. Chaperoning shape-shifting tau in disease. Trends Biochem Sci 2022; 47:301-313. [PMID: 35045944 DOI: 10.1016/j.tibs.2021.12.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 12/14/2021] [Accepted: 12/16/2021] [Indexed: 02/07/2023]
Abstract
Many neurodegenerative diseases, including Alzheimer's, originate from the conversion of proteins into pathogenic conformations. The microtubule-associated protein tau converts into β-sheet-rich amyloid conformations, which underlie pathology in over 25 related tauopathies. Structural studies of tau amyloid fibrils isolated from human tauopathy tissues have revealed that tau adopts diverse structural polymorphs, each linked to a different disease. Molecular chaperones play central roles in regulating tau function and amyloid assembly in disease. New data supports the model that chaperones selectively recognize different conformations of tau to limit the accumulation of proteotoxic species. The challenge now is to understand how chaperones influence disease processes across different tauopathies, which will help guide the development of novel conformation-specific diagnostic and therapeutic strategies.
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Affiliation(s)
- Bryan D Ryder
- Molecular Biophysics Graduate Program, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Center for Alzheimer's and Neurodegenerative Diseases, Peter O'Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Pawel M Wydorski
- Molecular Biophysics Graduate Program, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Center for Alzheimer's and Neurodegenerative Diseases, Peter O'Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Zhiqiang Hou
- Center for Alzheimer's and Neurodegenerative Diseases, Peter O'Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Lukasz A Joachimiak
- Center for Alzheimer's and Neurodegenerative Diseases, Peter O'Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
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28
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Liu Y, Han K, Zhu YH, Zhang Y, Shen LC, Song J, Yu DJ. Improving protein fold recognition using triplet network and ensemble deep learning. Brief Bioinform 2021; 22:bbab248. [PMID: 34226918 PMCID: PMC8768454 DOI: 10.1093/bib/bbab248] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 06/04/2021] [Indexed: 12/24/2022] Open
Abstract
Protein fold recognition is a critical step toward protein structure and function prediction, aiming at providing the most likely fold type of the query protein. In recent years, the development of deep learning (DL) technique has led to massive advances in this important field, and accordingly, the sensitivity of protein fold recognition has been dramatically improved. Most DL-based methods take an intermediate bottleneck layer as the feature representation of proteins with new fold types. However, this strategy is indirect, inefficient and conditional on the hypothesis that the bottleneck layer's representation is assumed as a good representation of proteins with new fold types. To address the above problem, in this work, we develop a new computational framework by combining triplet network and ensemble DL. We first train a DL-based model, termed FoldNet, which employs triplet loss to train the deep convolutional network. FoldNet directly optimizes the protein fold embedding itself, making the proteins with the same fold types be closer to each other than those with different fold types in the new protein embedding space. Subsequently, using the trained FoldNet, we implement a new residue-residue contact-assisted predictor, termed FoldTR, which improves protein fold recognition. Furthermore, we propose a new ensemble DL method, termed FSD_XGBoost, which combines protein fold embedding with the other two discriminative fold-specific features extracted by two DL-based methods SSAfold and DeepFR. The Top 1 sensitivity of FSD_XGBoost increases to 74.8% at the fold level, which is ~9% higher than that of the state-of-the-art method. Together, the results suggest that fold-specific features extracted by different DL methods complement with each other, and their combination can further improve fold recognition at the fold level. The implemented web server of FoldTR and benchmark datasets are publicly available at http://csbio.njust.edu.cn/bioinf/foldtr/.
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Affiliation(s)
| | | | | | | | | | - Jiangning Song
- Corresponding authors: Dong-Jun Yu, School of Computer Science and Engineering, Nanjing University of Science and Technology, 200 Xiaolingwei, Nanjing 210094, China. E-mail: ; Jiangning Song, Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Melbourne, Victoria 3800, Australia. E-mail:
| | - Dong-Jun Yu
- Corresponding authors: Dong-Jun Yu, School of Computer Science and Engineering, Nanjing University of Science and Technology, 200 Xiaolingwei, Nanjing 210094, China. E-mail: ; Jiangning Song, Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Melbourne, Victoria 3800, Australia. E-mail:
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29
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Pras A, Houben B, Aprile FA, Seinstra R, Gallardo R, Janssen L, Hogewerf W, Gallrein C, De Vleeschouwer M, Mata‐Cabana A, Koopman M, Stroo E, de Vries M, Louise Edwards S, Kirstein J, Vendruscolo M, Falsone SF, Rousseau F, Schymkowitz J, Nollen EAA. The cellular modifier MOAG-4/SERF drives amyloid formation through charge complementation. EMBO J 2021; 40:e107568. [PMID: 34617299 PMCID: PMC8561633 DOI: 10.15252/embj.2020107568] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 08/27/2021] [Accepted: 09/01/2021] [Indexed: 11/09/2022] Open
Abstract
While aggregation-prone proteins are known to accelerate aging and cause age-related diseases, the cellular mechanisms that drive their cytotoxicity remain unresolved. The orthologous proteins MOAG-4, SERF1A, and SERF2 have recently been identified as cellular modifiers of such proteotoxicity. Using a peptide array screening approach on human amyloidogenic proteins, we found that SERF2 interacted with protein segments enriched in negatively charged and hydrophobic, aromatic amino acids. The absence of such segments, or the neutralization of the positive charge in SERF2, prevented these interactions and abolished the amyloid-promoting activity of SERF2. In protein aggregation models in the nematode worm Caenorhabditis elegans, protein aggregation and toxicity were suppressed by mutating the endogenous locus of MOAG-4 to neutralize charge. Our data indicate that MOAG-4 and SERF2 drive protein aggregation and toxicity by interactions with negatively charged segments in aggregation-prone proteins. Such charge interactions might accelerate primary nucleation of amyloid by initiating structural changes and by decreasing colloidal stability. Our study points at charge interactions between cellular modifiers and amyloidogenic proteins as potential targets for interventions to reduce age-related protein toxicity.
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Affiliation(s)
- Anita Pras
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
| | - Bert Houben
- VIB‐KU Leuven Center for Brain and Disease ResearchLeuvenBelgium
- Switch LaboratoryDepartment of Cellular and Molecular MedicineKU LeuvenLeuvenBelgium
| | - Francesco A Aprile
- Department of ChemistryCentre for Misfolding DiseasesUniversity of CambridgeCambridgeUK
- Present address:
Department of ChemistryMolecular Sciences Research HubImperial College LondonLondonUK
| | - Renée Seinstra
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
| | - Rodrigo Gallardo
- VIB‐KU Leuven Center for Brain and Disease ResearchLeuvenBelgium
- Switch LaboratoryDepartment of Cellular and Molecular MedicineKU LeuvenLeuvenBelgium
- Present address:
Astbury Centre for Structural Molecular BiologySchool of Molecular and Cellular BiologyUniversity of LeedsLeedsUK
| | - Leen Janssen
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
| | - Wytse Hogewerf
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
| | - Christian Gallrein
- Department of Molecular Physiology and Cell BiologyLeibniz Research Institute for Molecular Pharmacology im Forschungsverbund Berlin e.V. (FMP)BerlinGermany
| | - Matthias De Vleeschouwer
- VIB‐KU Leuven Center for Brain and Disease ResearchLeuvenBelgium
- Switch LaboratoryDepartment of Cellular and Molecular MedicineKU LeuvenLeuvenBelgium
| | - Alejandro Mata‐Cabana
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
| | - Mandy Koopman
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
| | - Esther Stroo
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
| | - Minke de Vries
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
| | - Samantha Louise Edwards
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
| | - Janine Kirstein
- Department of Molecular Physiology and Cell BiologyLeibniz Research Institute for Molecular Pharmacology im Forschungsverbund Berlin e.V. (FMP)BerlinGermany
- Faculty of Biology & ChemistryUniversity of BremenBremenGermany
| | - Michele Vendruscolo
- Department of ChemistryCentre for Misfolding DiseasesUniversity of CambridgeCambridgeUK
| | | | - Frederic Rousseau
- VIB‐KU Leuven Center for Brain and Disease ResearchLeuvenBelgium
- Switch LaboratoryDepartment of Cellular and Molecular MedicineKU LeuvenLeuvenBelgium
| | - Joost Schymkowitz
- VIB‐KU Leuven Center for Brain and Disease ResearchLeuvenBelgium
- Switch LaboratoryDepartment of Cellular and Molecular MedicineKU LeuvenLeuvenBelgium
| | - Ellen A A Nollen
- European Research Institute for the Biology of AgeingUniversity of GroningenUniversity Medical Centre GroningenGroningenThe Netherlands
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30
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Arhar T, Shkedi A, Nadel CM, Gestwicki JE. The interactions of molecular chaperones with client proteins: why are they so weak? J Biol Chem 2021; 297:101282. [PMID: 34624315 PMCID: PMC8567204 DOI: 10.1016/j.jbc.2021.101282] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 09/29/2021] [Accepted: 10/04/2021] [Indexed: 12/30/2022] Open
Abstract
The major classes of molecular chaperones have highly variable sequences, sizes, and shapes, yet they all bind to unfolded proteins, limit their aggregation, and assist in their folding. Despite the central importance of this process to protein homeostasis, it has not been clear exactly how chaperones guide this process or whether the diverse families of chaperones use similar mechanisms. For the first time, recent advances in NMR spectroscopy have enabled detailed studies of how unfolded, "client" proteins interact with both ATP-dependent and ATP-independent classes of chaperones. Here, we review examples from four distinct chaperones, Spy, Trigger Factor, DnaK, and HscA-HscB, highlighting the similarities and differences between their mechanisms. One striking similarity is that the chaperones all bind weakly to their clients, such that the chaperone-client interactions are readily outcompeted by stronger, intra- and intermolecular contacts in the folded state. Thus, the relatively weak affinity of these interactions seems to provide directionality to the folding process. However, there are also key differences, especially in the details of how the chaperones release clients and how ATP cycling impacts that process. For example, Spy releases clients in a largely folded state, while clients seem to be unfolded upon release from Trigger Factor or DnaK. Together, these studies are beginning to uncover the similarities and differences in how chaperones use weak interactions to guide protein folding.
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Affiliation(s)
- Taylor Arhar
- Department of Pharmaceutical Chemistry and the Institute for Neurodegenerative Disease, University of California San Francisco, San Francisco California, USA
| | - Arielle Shkedi
- Department of Pharmaceutical Chemistry and the Institute for Neurodegenerative Disease, University of California San Francisco, San Francisco California, USA
| | - Cory M Nadel
- Department of Pharmaceutical Chemistry and the Institute for Neurodegenerative Disease, University of California San Francisco, San Francisco California, USA
| | - Jason E Gestwicki
- Department of Pharmaceutical Chemistry and the Institute for Neurodegenerative Disease, University of California San Francisco, San Francisco California, USA.
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31
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Alexander CC, Munkáscy E, Tillmon H, Fraker T, Scheirer J, Holstein D, Lozano D, Khan M, Gidalevitz T, Lechleiter JD, Fisher AL, Zare H, Rodriguez KA. HspB1 Overexpression Improves Lifespan and Stress Resistance in an Invertebrate Model. J Gerontol A Biol Sci Med Sci 2021; 77:268-275. [PMID: 34610126 PMCID: PMC8824566 DOI: 10.1093/gerona/glab296] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Indexed: 11/14/2022] Open
Abstract
To explore the role of the small heat shock protein beta 1 (HspB1, also known as Hsp25 in rodents and Hsp27 in humans) in longevity, we created a Caenorhabiditis elegans model with a high level of ubiquitous expression of the naked mole-rat HspB1 protein. The worms showed increased life span under multiple conditions and also increased resistance to heat stress. RNAi experiments suggest that HspB1-induced life extension is dependent on the transcription factors skn-1 (Nrf2) and hsf-1 (Hsf1). RNAseq from HspB1 worms showed an enrichment in several skn-1 target genes, including collagen proteins and lysosomal genes. Expression of HspB1 also improved functional outcomes regulated by SKN-1, specifically oxidative stress resistance and pharyngeal integrity. This work is the first to link a small heat shock protein with collagen function, suggesting a novel role for HspB1 as a hub between canonical heat response signaling and SKN-1 transcription.
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Affiliation(s)
- Courtney Carroll Alexander
- Sam and Ann Barshop Center for Longevity and Aging Studies, University of Texas Health Science Center San Antonio (UTHSCSA), San Antonio, TX.,Department of Cell Systems and Anatomy, UTHSCSA
| | - Erin Munkáscy
- Sam and Ann Barshop Center for Longevity and Aging Studies, University of Texas Health Science Center San Antonio (UTHSCSA), San Antonio, TX.,Department of Cell Systems and Anatomy, UTHSCSA
| | - Haven Tillmon
- Sam and Ann Barshop Center for Longevity and Aging Studies, University of Texas Health Science Center San Antonio (UTHSCSA), San Antonio, TX
| | - Tamara Fraker
- Sam and Ann Barshop Center for Longevity and Aging Studies, University of Texas Health Science Center San Antonio (UTHSCSA), San Antonio, TX.,Department of Cell Systems and Anatomy, UTHSCSA
| | - Jessica Scheirer
- Sam and Ann Barshop Center for Longevity and Aging Studies, University of Texas Health Science Center San Antonio (UTHSCSA), San Antonio, TX.,Department of Cell Systems and Anatomy, UTHSCSA
| | | | | | - Maruf Khan
- Department of Cell Systems and Anatomy, UTHSCSA
| | | | | | - Alfred L Fisher
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE
| | - Habil Zare
- Department of Cell Systems and Anatomy, UTHSCSA.,Glenn Biggs Institute for Alzheimer's & Neurodegenerative Diseases, UTHSCSA, San Antonio, TX
| | - Karl A Rodriguez
- Sam and Ann Barshop Center for Longevity and Aging Studies, University of Texas Health Science Center San Antonio (UTHSCSA), San Antonio, TX.,Department of Cell Systems and Anatomy, UTHSCSA
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32
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The binding of the small heat-shock protein αB-crystallin to fibrils of α-synuclein is driven by entropic forces. Proc Natl Acad Sci U S A 2021; 118:2108790118. [PMID: 34518228 PMCID: PMC8463877 DOI: 10.1073/pnas.2108790118] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/27/2021] [Indexed: 11/18/2022] Open
Abstract
Molecular chaperones are key components of the cellular proteostasis network whose role includes the suppression of the formation and proliferation of pathogenic aggregates associated with neurodegenerative diseases. The molecular principles that allow chaperones to recognize misfolded and aggregated proteins remain, however, incompletely understood. To address this challenge, here we probe the thermodynamics and kinetics of the interactions between chaperones and protein aggregates under native solution conditions using a microfluidic platform. We focus on the binding between amyloid fibrils of α-synuclein, associated with Parkinson's disease, to the small heat-shock protein αB-crystallin, a chaperone widely involved in the cellular stress response. We find that αB-crystallin binds to α-synuclein fibrils with high nanomolar affinity and that the binding is driven by entropy rather than enthalpy. Measurements of the change in heat capacity indicate significant entropic gain originates from the disassembly of the oligomeric chaperones that function as an entropic buffer system. These results shed light on the functional roles of chaperone oligomerization and show that chaperones are stored as inactive complexes which are capable of releasing active subunits to target aberrant misfolded species.
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33
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DnaJC7 binds natively folded structural elements in tau to inhibit amyloid formation. Nat Commun 2021; 12:5338. [PMID: 34504072 PMCID: PMC8429438 DOI: 10.1038/s41467-021-25635-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 08/24/2021] [Indexed: 02/07/2023] Open
Abstract
Molecular chaperones, including Hsp70/J-domain protein (JDP) families, play central roles in binding substrates to prevent their aggregation. How JDPs select different conformations of substrates remains poorly understood. Here, we report an interaction between the JDP DnaJC7 and tau that efficiently suppresses tau aggregation in vitro and in cells. DnaJC7 binds preferentially to natively folded wild-type tau, but disease-associated mutants in tau reduce chaperone binding affinity. We identify that DnaJC7 uses a single TPR domain to recognize a β-turn structural element in tau that contains the 275VQIINK280 amyloid motif. Wild-type tau, but not mutant, β-turn structural elements can block full-length tau binding to DnaJC7. These data suggest DnaJC7 preferentially binds and stabilizes natively folded conformations of tau to prevent tau conversion into amyloids. Our work identifies a novel mechanism of tau aggregation regulation that can be exploited as both a diagnostic and a therapeutic intervention.
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34
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Sinsky J, Pichlerova K, Hanes J. Tau Protein Interaction Partners and Their Roles in Alzheimer's Disease and Other Tauopathies. Int J Mol Sci 2021; 22:9207. [PMID: 34502116 PMCID: PMC8431036 DOI: 10.3390/ijms22179207] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 08/23/2021] [Accepted: 08/25/2021] [Indexed: 02/06/2023] Open
Abstract
Tau protein plays a critical role in the assembly, stabilization, and modulation of microtubules, which are important for the normal function of neurons and the brain. In diseased conditions, several pathological modifications of tau protein manifest. These changes lead to tau protein aggregation and the formation of paired helical filaments (PHF) and neurofibrillary tangles (NFT), which are common hallmarks of Alzheimer's disease and other tauopathies. The accumulation of PHFs and NFTs results in impairment of physiological functions, apoptosis, and neuronal loss, which is reflected as cognitive impairment, and in the late stages of the disease, leads to death. The causes of this pathological transformation of tau protein haven't been fully understood yet. In both physiological and pathological conditions, tau interacts with several proteins which maintain their proper function or can participate in their pathological modifications. Interaction partners of tau protein and associated molecular pathways can either initiate and drive the tau pathology or can act neuroprotective, by reducing pathological tau proteins or inflammation. In this review, we focus on the tau as a multifunctional protein and its known interacting partners active in regulations of different processes and the roles of these proteins in Alzheimer's disease and tauopathies.
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Affiliation(s)
| | | | - Jozef Hanes
- Institute of Neuroimmunology, Slovak Academy of Sciences, Dubravska Cesta 9, 845 10 Bratislava, Slovakia; (J.S.); (K.P.)
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35
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Gonçalves CC, Sharon I, Schmeing TM, Ramos CHI, Young JC. The chaperone HSPB1 prepares protein aggregates for resolubilization by HSP70. Sci Rep 2021; 11:17139. [PMID: 34429462 PMCID: PMC8384840 DOI: 10.1038/s41598-021-96518-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Accepted: 08/11/2021] [Indexed: 01/22/2023] Open
Abstract
In human cells under stress conditions, misfolded polypeptides can form potentially cytotoxic insoluble aggregates. To eliminate aggregates, the HSP70 chaperone machinery extracts and resolubilizes polypeptides for triage to refolding or degradation. Yeast and bacterial chaperones of the small heat-shock protein (sHSP) family can bind substrates at early stages of misfolding, during the aggregation process. The co-aggregated sHSPs then facilitate downstream disaggregation by HSP70. Because it is unknown whether a human sHSP has this activity, we investigated the disaggregation role of human HSPB1. HSPB1 co-aggregated with unfolded protein substrates, firefly luciferase and mammalian lactate dehydrogenase. The co-aggregates formed with HSPB1 were smaller and more regularly shaped than those formed in its absence. Importantly, co-aggregation promoted the efficient disaggregation and refolding of the substrates, led by HSP70. HSPB1 itself was also extracted during disaggregation, and its homo-oligomerization ability was not required. Therefore, we propose that a human sHSP is an integral part of the chaperone network for protein disaggregation.
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Affiliation(s)
- Conrado C Gonçalves
- Department of Biochemistry, McGill University, 3655 Promenade Sir William Osler, Room 900, Montreal, QC, H3G 1Y6, Canada
| | - Itai Sharon
- Department of Biochemistry, McGill University, 3649 Promenade Sir William Osler, Room 457, Montreal, QC, H3G 0B1, Canada
| | - T Martin Schmeing
- Department of Biochemistry, McGill University, 3649 Promenade Sir William Osler, Room 457, Montreal, QC, H3G 0B1, Canada
| | - Carlos H I Ramos
- Institute of Chemistry, University of Campinas (UNICAMP), Campinas, SP, 13083-970, Brazil
| | - Jason C Young
- Department of Biochemistry, McGill University, 3655 Promenade Sir William Osler, Room 900, Montreal, QC, H3G 1Y6, Canada.
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36
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Irwin R, Faust O, Petrovic I, Wolf SG, Hofmann H, Rosenzweig R. Hsp40s play complementary roles in the prevention of tau amyloid formation. eLife 2021; 10:69601. [PMID: 34369377 PMCID: PMC8437434 DOI: 10.7554/elife.69601] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 08/08/2021] [Indexed: 11/21/2022] Open
Abstract
The microtubule-associated protein, tau, is the major subunit of neurofibrillary tangles associated with neurodegenerative conditions, such as Alzheimer's disease. In the cell, however, tau aggregation can be prevented by a class of proteins known as molecular chaperones. While numerous chaperones are known to interact with tau, though, little is known regarding the mechanisms by which these prevent tau aggregation. Here, we describe the effects of ATP-independent Hsp40 chaperones, DNAJA2 and DNAJB1, on tau amyloid-fiber formation and compare these to the small heat shock protein HSPB1. We find that the chaperones play complementary roles, with each preventing tau aggregation differently and interacting with distinct sets of tau species. Whereas HSPB1 only binds tau monomers, DNAJB1 and DNAJA2 recognize aggregation-prone conformers and even mature fibers. In addition, we find that both Hsp40s bind tau seeds and fibers via their C-terminal domain II (CTDII), with DNAJA2 being further capable of recognizing tau monomers by a second, distinct site in CTDI. These results lay out the mechanisms by which the diverse members of the Hsp40 family counteract the formation and propagation of toxic tau aggregates and highlight the fact that chaperones from different families/classes play distinct, yet complementary roles in preventing pathological protein aggregation. Several neurological conditions, such as Alzheimer’s and Parkinson’s disease, are characterized by the build-up of protein clumps known as aggregates. In the case of Alzheimer’s disease, a key protein, called tau, aggregates to form fibers that are harmful to neuronal cells in the brain. One of the ways our cells can prevent this from occurring is through the action of proteins known as molecular chaperones, which can bind to tau proteins and prevent them from sticking together. Tau can take on many forms. For example, a single tau protein on its own, known as a monomer, is unstructured. In patients with Alzheimer’s, these monomers join together into small clusters, known as seeds, that rapidly aggregate and accumulate into rigid, structured fibers. One chaperone, HSPB1, is known to bind to tau monomers and prevent them from being incorporated into fibers. Recently, another group of chaperones, called J-domain proteins, was also found to interact with tau. However, it was unclear how these chaperones prevent aggregation and whether they bind to tau in a similar manner as HSPB1. To help answer this question, Irwin, Faust et al. studied the effect of two J-domain proteins, as well as the chaperone HSBP1, on tau aggregation. This revealed that, unlike HSBP1, the two J-domain proteins can bind to multiple forms of tau, including when it has already aggregated in to seeds and fibers. This suggests that these chaperones can stop the accumulation of fibers at several different stages of the aggregation process. Further experiments examining which sections of the J-domain proteins bind to tau, showed that both attach to fibers via the same region. However, the two J-domain proteins are not identical in their interaction with tau. While one of them uses a distinct region to bind to tau monomers, the other does not bind to single tau proteins at all. These results demonstrate how different cellular chaperones can complement one another in order to inhibit harmful protein aggregation. Further studies will be needed to understand the full role of J-domain proteins in preventing tau from accumulating into fibers, as well as their potential as drug targets for developing new treatments.
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Affiliation(s)
- Rose Irwin
- Weizmann Institute of Science, Rehovot, Israel
| | - Ofrah Faust
- Weizmann Institute of Science, Rehovot, Israel
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37
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Mechanistic roles for altered O-GlcNAcylation in neurodegenerative disorders. Biochem J 2021; 478:2733-2758. [PMID: 34297044 DOI: 10.1042/bcj20200609] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 06/28/2021] [Accepted: 07/01/2021] [Indexed: 01/02/2023]
Abstract
Neurodegenerative diseases such as Alzheimer's and Parkinson's remain highly prevalent and incurable disorders. A major challenge in fully understanding and combating the progression of these diseases is the complexity of the network of processes that lead to progressive neuronal dysfunction and death. An ideal therapeutic avenue is conceivably one that could address many if not all of these multiple misregulated mechanisms. Over the years, chemical intervention for the up-regulation of the endogenous posttranslational modification (PTM) O-GlcNAc has been proposed as a potential strategy to slow down the progression of neurodegeneration. Through the development and application of tools that allow dissection of the mechanistic roles of this PTM, there is now a growing body of evidence that O-GlcNAc influences a variety of important neurodegeneration-pertinent mechanisms, with an overall protective effect. As a PTM that is appended onto numerous proteins that participate in protein quality control and homeostasis, metabolism, bioenergetics, neuronal communication, inflammation, and programmed death, O-GlcNAc has demonstrated beneficence in animal models of neurodegenerative diseases, and its up-regulation is now being pursued in multiple clinical studies.
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38
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Reinle K, Mogk A, Bukau B. The Diverse Functions of Small Heat Shock Proteins in the Proteostasis Network. J Mol Biol 2021; 434:167157. [PMID: 34271010 DOI: 10.1016/j.jmb.2021.167157] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/07/2021] [Accepted: 07/08/2021] [Indexed: 01/21/2023]
Abstract
The protein quality control (PQC) system maintains protein homeostasis by counteracting the accumulation of misfolded protein conformers. Substrate degradation and refolding activities executed by ATP-dependent proteases and chaperones constitute major strategies of the proteostasis network. Small heat shock proteins represent ATP-independent chaperones that bind to misfolded proteins, preventing their uncontrolled aggregation. sHsps share the conserved α-crystallin domain (ACD) and gain functional specificity through variable and largely disordered N- and C-terminal extensions (NTE, CTE). They form large, polydisperse oligomers through multiple, weak interactions between NTE/CTEs and ACD dimers. Sequence variations of sHsps and the large variability of sHsp oligomers enable sHsps to fulfill diverse tasks in the PQC network. sHsp oligomers represent inactive yet dynamic resting states that are rapidly deoligomerized and activated upon stress conditions, releasing substrate binding sites in NTEs and ACDs Bound substrates are usually isolated in large sHsp/substrate complexes. This sequestration activity of sHsps represents a third strategy of the proteostasis network. Substrate sequestration reduces the burden for other PQC components during immediate and persistent stress conditions. Sequestered substrates can be released and directed towards refolding pathways by ATP-dependent Hsp70/Hsp100 chaperones or sorted for degradation by autophagic pathways. sHsps can also maintain the dynamic state of phase-separated stress granules (SGs), which store mRNA and translation factors, by reducing the accumulation of misfolded proteins inside SGs and preventing unfolding of SG components. This ensures SG disassembly and regain of translational capacity during recovery periods.
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Affiliation(s)
- Kevin Reinle
- Center for Molecular Biology of the University of Heidelberg (ZMBH), DKFZ-ZMBH Alliance, Im Neuenheimer Feld 282, 69120 Heidelberg, Germany; Deutsches Krebsforschungszentrum (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Axel Mogk
- Center for Molecular Biology of the University of Heidelberg (ZMBH), DKFZ-ZMBH Alliance, Im Neuenheimer Feld 282, 69120 Heidelberg, Germany; Deutsches Krebsforschungszentrum (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany.
| | - Bernd Bukau
- Center for Molecular Biology of the University of Heidelberg (ZMBH), DKFZ-ZMBH Alliance, Im Neuenheimer Feld 282, 69120 Heidelberg, Germany; Deutsches Krebsforschungszentrum (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany.
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39
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Blaszczak E, Lazarewicz N, Sudevan A, Wysocki R, Rabut G. Protein-fragment complementation assays for large-scale analysis of protein-protein interactions. Biochem Soc Trans 2021; 49:1337-1348. [PMID: 34156434 PMCID: PMC8286835 DOI: 10.1042/bst20201058] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 05/10/2021] [Accepted: 05/14/2021] [Indexed: 12/25/2022]
Abstract
Protein-protein interactions (PPIs) orchestrate nearly all biological processes. They are also considered attractive drug targets for treating many human diseases, including cancers and neurodegenerative disorders. Protein-fragment complementation assays (PCAs) provide a direct and straightforward way to study PPIs in living cells or multicellular organisms. Importantly, PCAs can be used to detect the interaction of proteins expressed at endogenous levels in their native cellular environment. In this review, we present the principle of PCAs and discuss some of their advantages and limitations. We describe their application in large-scale experiments to investigate PPI networks and to screen or profile PPI targeting compounds.
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Affiliation(s)
- Ewa Blaszczak
- Department of Genetics and Cell Physiology, Faculty of Biological Sciences, University of Wroclaw, Kanonia 6/8, 50-328 Wroclaw, Poland
| | - Natalia Lazarewicz
- Department of Genetics and Cell Physiology, Faculty of Biological Sciences, University of Wroclaw, Kanonia 6/8, 50-328 Wroclaw, Poland
- Univ Rennes, CNRS, IGDR (Institute of Genetics and Development of Rennes) – UMR 6290, F-35000 Rennes, France
| | - Aswani Sudevan
- Univ Rennes, CNRS, IGDR (Institute of Genetics and Development of Rennes) – UMR 6290, F-35000 Rennes, France
| | - Robert Wysocki
- Department of Genetics and Cell Physiology, Faculty of Biological Sciences, University of Wroclaw, Kanonia 6/8, 50-328 Wroclaw, Poland
| | - Gwenaël Rabut
- Univ Rennes, CNRS, IGDR (Institute of Genetics and Development of Rennes) – UMR 6290, F-35000 Rennes, France
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40
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Balana AT, Levine PM, Craven TW, Mukherjee S, Pedowitz NJ, Moon SP, Takahashi TT, Becker CFW, Baker D, Pratt MR. O-GlcNAc modification of small heat shock proteins enhances their anti-amyloid chaperone activity. Nat Chem 2021; 13:441-450. [PMID: 33723378 PMCID: PMC8102337 DOI: 10.1038/s41557-021-00648-8] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 01/27/2021] [Indexed: 11/09/2022]
Abstract
A major role for the intracellular post-translational modification O-GlcNAc appears to be the inhibition of protein aggregation. Most of the previous studies in this area focused on O-GlcNAc modification of the amyloid-forming proteins themselves. Here we used synthetic protein chemistry to discover that O-GlcNAc also activates the anti-amyloid activity of certain small heat shock proteins (sHSPs), a potentially more important modification event that can act broadly and substoichiometrically. More specifically, we found that O-GlcNAc increases the ability of sHSPs to block the amyloid formation of both α-synuclein and Aβ(1-42). Mechanistically, we show that O-GlcNAc near the sHSP IXI-domain prevents its ability to intramolecularly compete with substrate binding. Finally, we found that, although O-GlcNAc levels are globally reduced in Alzheimer's disease brains, the modification of relevant sHSPs is either maintained or increased, which suggests a mechanism to maintain these potentially protective O-GlcNAc modifications. Our results have important implications for neurodegenerative diseases associated with amyloid formation and potentially other areas of sHSP biology.
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Affiliation(s)
- Aaron T Balana
- Departments of Chemistry, University of Southern California, Los Angeles, CA, USA
| | - Paul M Levine
- Departments of Chemistry, University of Southern California, Los Angeles, CA, USA
| | - Timothy W Craven
- Department of Biochemistry and Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Somnath Mukherjee
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - Nichole J Pedowitz
- Departments of Chemistry, University of Southern California, Los Angeles, CA, USA
| | - Stuart P Moon
- Departments of Chemistry, University of Southern California, Los Angeles, CA, USA
| | - Terry T Takahashi
- Departments of Chemistry, University of Southern California, Los Angeles, CA, USA
| | - Christian F W Becker
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - David Baker
- Department of Biochemistry and Institute for Protein Design, University of Washington, Seattle, WA, USA
| | - Matthew R Pratt
- Departments of Chemistry, University of Southern California, Los Angeles, CA, USA. .,Biological Sciences, University of Southern California, Los Angeles, CA, USA.
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41
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Alderson TR, Adriaenssens E, Asselbergh B, Pritišanac I, Van Lent J, Gastall HY, Wälti MA, Louis JM, Timmerman V, Baldwin AJ, Lp Benesch J. A weakened interface in the P182L variant of HSP27 associated with severe Charcot-Marie-Tooth neuropathy causes aberrant binding to interacting proteins. EMBO J 2021; 40:e103811. [PMID: 33644875 PMCID: PMC8047445 DOI: 10.15252/embj.2019103811] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 01/10/2021] [Accepted: 01/14/2021] [Indexed: 01/18/2023] Open
Abstract
HSP27 is a human molecular chaperone that forms large, dynamic oligomers and functions in many aspects of cellular homeostasis. Mutations in HSP27 cause Charcot‐Marie‐Tooth (CMT) disease, the most common inherited disorder of the peripheral nervous system. A particularly severe form of CMT disease is triggered by the P182L mutation in the highly conserved IxI/V motif of the disordered C‐terminal region, which interacts weakly with the structured core domain of HSP27. Here, we observed that the P182L mutation disrupts the chaperone activity and significantly increases the size of HSP27 oligomers formed in vivo, including in motor neurons differentiated from CMT patient‐derived stem cells. Using NMR spectroscopy, we determined that the P182L mutation decreases the affinity of the HSP27 IxI/V motif for its own core domain, leaving this binding site more accessible for other IxI/V‐containing proteins. We identified multiple IxI/V‐bearing proteins that bind with higher affinity to the P182L variant due to the increased availability of the IxI/V‐binding site. Our results provide a mechanistic basis for the impact of the P182L mutation on HSP27 and suggest that the IxI/V motif plays an important, regulatory role in modulating protein–protein interactions.
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Affiliation(s)
- T Reid Alderson
- Chemistry Research Laboratory, University of Oxford, Oxford, UK.,Laboratory of Chemical Physics, National Institutes of Health, Bethesda, MD, USA
| | - Elias Adriaenssens
- Peripheral Neuropathy Research Group, Department of Biomedical Sciences, Institute Born Bunge, University of Antwerp, Antwerpen, Belgium
| | - Bob Asselbergh
- Neuromics Support Facility, VIB Center for Molecular Neurology, VIB, Antwerpen, Belgium.,Neuromics Support Facility, Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Iva Pritišanac
- Molecular Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada
| | - Jonas Van Lent
- Peripheral Neuropathy Research Group, Department of Biomedical Sciences, Institute Born Bunge, University of Antwerp, Antwerpen, Belgium
| | - Heidi Y Gastall
- Chemistry Research Laboratory, University of Oxford, Oxford, UK
| | - Marielle A Wälti
- Laboratory of Chemical Physics, National Institutes of Health, Bethesda, MD, USA
| | - John M Louis
- Laboratory of Chemical Physics, National Institutes of Health, Bethesda, MD, USA
| | - Vincent Timmerman
- Peripheral Neuropathy Research Group, Department of Biomedical Sciences, Institute Born Bunge, University of Antwerp, Antwerpen, Belgium
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42
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Edkins AL, Boshoff A. General Structural and Functional Features of Molecular Chaperones. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1340:11-73. [PMID: 34569020 DOI: 10.1007/978-3-030-78397-6_2] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Molecular chaperones are a group of structurally diverse and highly conserved ubiquitous proteins. They play crucial roles in facilitating the correct folding of proteins in vivo by preventing protein aggregation or facilitating the appropriate folding and assembly of proteins. Heat shock proteins form the major class of molecular chaperones that are responsible for protein folding events in the cell. This is achieved by ATP-dependent (folding machines) or ATP-independent mechanisms (holders). Heat shock proteins are induced by a variety of stresses, besides heat shock. The large and varied heat shock protein class is categorised into several subfamilies based on their sizes in kDa namely, small Hsps (HSPB), J domain proteins (Hsp40/DNAJ), Hsp60 (HSPD/E; Chaperonins), Hsp70 (HSPA), Hsp90 (HSPC), and Hsp100. Heat shock proteins are localised to different compartments in the cell to carry out tasks specific to their environment. Most heat shock proteins form large oligomeric structures, and their functions are usually regulated by a variety of cochaperones and cofactors. Heat shock proteins do not function in isolation but are rather part of the chaperone network in the cell. The general structural and functional features of the major heat shock protein families are discussed, including their roles in human disease. Their function is particularly important in disease due to increased stress in the cell. Vector-borne parasites affecting human health encounter stress during transmission between invertebrate vectors and mammalian hosts. Members of the main classes of heat shock proteins are all represented in Plasmodium falciparum, the causative agent of cerebral malaria, and they play specific functions in differentiation, cytoprotection, signal transduction, and virulence.
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Affiliation(s)
- Adrienne Lesley Edkins
- Biomedical Biotechnology Research Unit (BioBRU), Department of Biochemistry and Microbiology, Rhodes University, Makhanda/Grahamstown, South Africa.
- Rhodes University, Makhanda/Grahamstown, South Africa.
| | - Aileen Boshoff
- Rhodes University, Makhanda/Grahamstown, South Africa.
- Biotechnology Innovation Centre, Rhodes University, Makhanda/Grahamstown, South Africa.
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44
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Paul D, Chipurupalli S, Justin A, Raja K, Mohankumar SK. Caenorhabditis elegans as a possible model to screen anti-Alzheimer's therapeutics. J Pharmacol Toxicol Methods 2020; 106:106932. [PMID: 33091537 DOI: 10.1016/j.vascn.2020.106932] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 09/28/2020] [Accepted: 09/29/2020] [Indexed: 01/06/2023]
Abstract
Alzheimer's disease (AD) is regarded as one of the significant health burdens, as the prevalence is raising worldwide and gradually reaching to epidemic proportions. Consequently, a number of scientific investigations have been initiated to derive therapeutics to combat AD with a concurrent advancement in pharmacological methods and experimental models. Whilst, the available experimental pharmacological approaches both in vivo and in vitro led to the development of AD therapeutics, the precise manner by which experimental models mimic either one or more biomarkers of human pathology of AD is gaining scientific attentions. Caenorhabditis elegans (C. elegans) has been regarded as an emerging model for various reasons, including its high similarities with the biomarkers of human AD. Our review supports the versatile nature of C. elegans and collates that it is a well-suited model to elucidate various molecular mechanisms by which AD therapeutics elicit their pharmacological effects. It is apparent that C. elegans is capable of establishing the pathological processes that links the endoplasmic reticulum and mitochondria dysfunctions in AD, exploring novel molecular cascades of AD pathogenesis and underpinning causal and consequential changes in the associated proteins and genes. In summary, C. elegans is a unique and feasible model for the screening of anti-Alzheimer's therapeutics and has the potential for further scientific exploration.
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Affiliation(s)
- Deepraj Paul
- TIFAC CORE in Herbal Drugs, Department of Pharmacognosy, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Rockland's, Ooty 643001, Tamil Nadu, India
| | - Sandhya Chipurupalli
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Rockland's, Ooty 643001, Tamil Nadu, India
| | - Antony Justin
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Rockland's, Ooty 643001, Tamil Nadu, India
| | - Kalpana Raja
- Regenerative Biology, Morgridge Institute of Research, Madison, WI, USA
| | - Suresh K Mohankumar
- TIFAC CORE in Herbal Drugs, Department of Pharmacognosy, JSS College of Pharmacy, JSS Academy of Higher Education & Research, Rockland's, Ooty 643001, Tamil Nadu, India.
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Brandt R, Trushina NI, Bakota L. Much More Than a Cytoskeletal Protein: Physiological and Pathological Functions of the Non-microtubule Binding Region of Tau. Front Neurol 2020; 11:590059. [PMID: 33193056 PMCID: PMC7604284 DOI: 10.3389/fneur.2020.590059] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 09/16/2020] [Indexed: 12/21/2022] Open
Abstract
Tau protein (MAPT) is classified as a microtubule-associated protein (MAP) and is believed to regulate the axonal microtubule arrangement. It belongs to the tau/MAP2/MAP4 family of MAPs that have a similar microtubule binding region at their carboxy-terminal half. In tauopathies, such as Alzheimer's disease, tau is distributed more in the somatodendritic compartment, where it aggregates into filamentous structures, the formation of which correlates with cognitive impairments in patients. While microtubules are the dominant interaction partners of tau under physiological conditions, tau has many additional interaction partners that can contribute to its physiological and pathological role. In particular, the amino-terminal non-microtubule binding domain (N-terminal projection region, NTR) of tau interacts with many partners that are involved in membrane organization. The NTR contains intrinsically disordered regions (IDRs) that show a strong evolutionary increase in the disorder and may have been the basis for the development of new, tau-specific interactions. In this review we discuss the functional organization of the tau protein and the special features of the tau non-microtubule binding region also in the connection with the results of Tau KO models. We consider possible physiological and pathological functions of tau's non-microtubule interactions, which could indicate that interactions mediated by tau's NTR and regulated by far-reaching functional interactions of the PRR and the extreme C-terminus of tau contribute to the pathological processes.
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Affiliation(s)
- Roland Brandt
- Department of Neurobiology, University of Osnabrück, Osnabrück, Germany.,Center for Cellular Nanoanalytics, University of Osnabrück, Osnabrück, Germany.,Institute of Cognitive Science, University of Osnabrück, Osnabrück, Germany
| | | | - Lidia Bakota
- Department of Neurobiology, University of Osnabrück, Osnabrück, Germany
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Ernst BP, Wiesmann N, Gieringer R, Eckrich J, Brieger J. HSP27 regulates viability and migration of cancer cell lines following irradiation. J Proteomics 2020; 226:103886. [DOI: 10.1016/j.jprot.2020.103886] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 05/28/2020] [Accepted: 06/21/2020] [Indexed: 12/25/2022]
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Webster JM, Darling AL, Sanders TA, Blazier DM, Vidal-Aguiar Y, Beaulieu-Abdelahad D, Plemmons DG, Hill SE, Uversky VN, Bickford PC, Dickey CA, Blair LJ. Hsp22 with an N-Terminal Domain Truncation Mediates a Reduction in Tau Protein Levels. Int J Mol Sci 2020; 21:E5442. [PMID: 32751642 PMCID: PMC7432035 DOI: 10.3390/ijms21155442] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 07/27/2020] [Accepted: 07/28/2020] [Indexed: 11/21/2022] Open
Abstract
Misfolding, aggregation and accumulation of proteins are toxic elements in the progression of a broad range of neurodegenerative diseases. Molecular chaperones enable a cellular defense by reducing or compartmentalizing these insults. Small heat shock proteins (sHsps) engage proteins early in the process of misfolding and can facilitate their proper folding or refolding, sequestration, or clearance. Here, we evaluate the effects of the sHsp Hsp22, as well as a pseudophosphorylated mutant and an N-terminal domain deletion (NTDΔ) variant on tau aggregation in vitro and tau accumulation and aggregation in cultured cells. Hsp22 wild-type (WT) protein had a significant inhibitory effect on heparin-induced aggregation in vitro and the pseudophosphorylated mutant Hsp22 demonstrated a similar effect. When co-expressed in a cell culture model with tau, these Hsp22 constructs significantly reduced soluble tau protein levels when transfected at a high ratio relative to tau. However, the Hsp22 NTDΔ protein drastically reduced the soluble protein expression levels of both tau WT and tau P301L/S320F even at lower transfection ratios, which resulted in a correlative reduction of the triton-insoluble tau P301L/S320F aggregates.
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Affiliation(s)
- Jack M. Webster
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33620, USA; (J.M.W.); (A.L.D.); (T.A.S.); (D.M.B.); (Y.V.-A.); (D.B.-A.); (D.G.P.); (S.E.H.); (V.N.U.); (C.A.D.)
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33620, USA
| | - April L. Darling
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33620, USA; (J.M.W.); (A.L.D.); (T.A.S.); (D.M.B.); (Y.V.-A.); (D.B.-A.); (D.G.P.); (S.E.H.); (V.N.U.); (C.A.D.)
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33620, USA
| | - Taylor A. Sanders
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33620, USA; (J.M.W.); (A.L.D.); (T.A.S.); (D.M.B.); (Y.V.-A.); (D.B.-A.); (D.G.P.); (S.E.H.); (V.N.U.); (C.A.D.)
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33620, USA
| | - Danielle M. Blazier
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33620, USA; (J.M.W.); (A.L.D.); (T.A.S.); (D.M.B.); (Y.V.-A.); (D.B.-A.); (D.G.P.); (S.E.H.); (V.N.U.); (C.A.D.)
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33620, USA
| | - Yamile Vidal-Aguiar
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33620, USA; (J.M.W.); (A.L.D.); (T.A.S.); (D.M.B.); (Y.V.-A.); (D.B.-A.); (D.G.P.); (S.E.H.); (V.N.U.); (C.A.D.)
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33620, USA
| | - David Beaulieu-Abdelahad
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33620, USA; (J.M.W.); (A.L.D.); (T.A.S.); (D.M.B.); (Y.V.-A.); (D.B.-A.); (D.G.P.); (S.E.H.); (V.N.U.); (C.A.D.)
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33620, USA
| | - Drew G. Plemmons
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33620, USA; (J.M.W.); (A.L.D.); (T.A.S.); (D.M.B.); (Y.V.-A.); (D.B.-A.); (D.G.P.); (S.E.H.); (V.N.U.); (C.A.D.)
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33620, USA
| | - Shannon E. Hill
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33620, USA; (J.M.W.); (A.L.D.); (T.A.S.); (D.M.B.); (Y.V.-A.); (D.B.-A.); (D.G.P.); (S.E.H.); (V.N.U.); (C.A.D.)
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33620, USA
| | - Vladimir N. Uversky
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33620, USA; (J.M.W.); (A.L.D.); (T.A.S.); (D.M.B.); (Y.V.-A.); (D.B.-A.); (D.G.P.); (S.E.H.); (V.N.U.); (C.A.D.)
| | - Paula C. Bickford
- Research Service, James A Haley Veterans Hospital, 13000 Bruce B Downs Blvd, Tampa, FL 33612, USA;
- Department of Neurosurgery and Brain Repair, Morsani College of Medicine, University of South Florida Health, 12901 Bruce B Downs Blvd, Tampa, FL 33612, USA
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida Health, 12901 Bruce B Downs Blvd, Tampa, FL 33612, USA
| | - Chad A. Dickey
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33620, USA; (J.M.W.); (A.L.D.); (T.A.S.); (D.M.B.); (Y.V.-A.); (D.B.-A.); (D.G.P.); (S.E.H.); (V.N.U.); (C.A.D.)
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33620, USA
- Research Service, James A Haley Veterans Hospital, 13000 Bruce B Downs Blvd, Tampa, FL 33612, USA;
| | - Laura J. Blair
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, FL 33620, USA; (J.M.W.); (A.L.D.); (T.A.S.); (D.M.B.); (Y.V.-A.); (D.B.-A.); (D.G.P.); (S.E.H.); (V.N.U.); (C.A.D.)
- USF Health Byrd Alzheimer’s Institute, University of South Florida, Tampa, FL 33620, USA
- Research Service, James A Haley Veterans Hospital, 13000 Bruce B Downs Blvd, Tampa, FL 33612, USA;
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Abstract
In vivo, small heat-shock proteins (sHsps) are key players in maintaining a healthy proteome. αB-crystallin (αB-c) or HspB5 is one of the most widespread and populous of the ten human sHsps. Intracellularly, αB-c acts via its molecular chaperone action as the first line of defence in preventing target protein unfolding and aggregation under conditions of cellular stress. In this review, we explore how the structure of αB-c confers its function and interactions within its oligomeric self, with other sHsps, and with aggregation-prone target proteins. Firstly, the interaction between the two highly conserved regions of αB-c, the central α-crystallin domain and the C-terminal IXI motif and how this regulates αB-c chaperone activity are explored. Secondly, subunit exchange is rationalised as an integral structural and functional feature of αB-c. Thirdly, it is argued that monomeric αB-c may be its most chaperone-species active, but at the cost of increased hydrophobicity and instability. Fourthly, the reasons why hetero-oligomerisation of αB-c with other sHsps is important in regulating cellular proteostasis are examined. Finally, the interaction of αB-c with aggregation-prone, partially folded target proteins is discussed. Overall, this paper highlights the remarkably diverse capabilities of αB-c as a caretaker of the cell.
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Affiliation(s)
- Junna Hayashi
- Research School of Chemistry, The Australian National University, Acton, ACT, 2601, Australia
| | - John A Carver
- Research School of Chemistry, The Australian National University, Acton, ACT, 2601, Australia.
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Vendredy L, Adriaenssens E, Timmerman V. Small heat shock proteins in neurodegenerative diseases. Cell Stress Chaperones 2020; 25:679-699. [PMID: 32323160 PMCID: PMC7332613 DOI: 10.1007/s12192-020-01101-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/12/2020] [Indexed: 02/06/2023] Open
Abstract
Small heat shock proteins are ubiquitously expressed chaperones, yet mutations in some of them cause tissue-specific diseases. Here, we will discuss how small heat shock proteins give rise to neurodegenerative disorders themselves while we will also highlight how these proteins can fulfil protective functions in neurodegenerative disorders caused by protein aggregation. The first half of this paper will be focused on how mutations in HSPB1, HSPB3, and HSPB8 are linked to inherited peripheral neuropathies like Charcot-Marie-Tooth (CMT) disease and distal hereditary motor neuropathy (dHMN). The second part of the paper will discuss how small heat shock proteins are linked to neurodegenerative disorders like Alzheimer's, Parkinson's, and Huntington's disease.
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Affiliation(s)
- Leen Vendredy
- Department of Biomedical Sciences and Institute Born Bunge, Peripheral Neuropathy Research Group, University of Antwerp, Antwerp, Belgium
| | - Elias Adriaenssens
- Department of Biomedical Sciences and Institute Born Bunge, Peripheral Neuropathy Research Group, University of Antwerp, Antwerp, Belgium
| | - Vincent Timmerman
- Department of Biomedical Sciences and Institute Born Bunge, Peripheral Neuropathy Research Group, University of Antwerp, Antwerp, Belgium.
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Specific Roles of HSP27 S15 Phosphorylation Augmenting the Nuclear Function of HER2 to Promote Trastuzumab Resistance. Cancers (Basel) 2020; 12:cancers12061540. [PMID: 32545363 PMCID: PMC7352409 DOI: 10.3390/cancers12061540] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 06/09/2020] [Accepted: 06/09/2020] [Indexed: 02/07/2023] Open
Abstract
Trastuzumab (TZMB) is widely used as first line therapy for breast cancer (BC) patients overexpressing human epidermal growth factor receptor 2 (HER2). Despite its clinical benefits, many patients suffer from primary or secondary resistance to this drug within one year. As diverse molecular mechanisms occur contemporaneously during the resistance development, we focused on elucidating the role of heat shock protein 27 (HSP27) in TZMB-resistance, as this protein simultaneously regulates the function of diverse client molecules that are involved in the resistance mechanism. By extensively utilizing TZMB-refractory breast cancer cell lines transduced with diverse phosphovariants of HSP27, our study newly revealed that specific phosphorylation of HSP27 at S15 promoted its S78 phosphorylation and served as key mediator to promote direct interactions that increase the stability of HER2 and protein kinase B (AKT). This phosphorylation promoted nuclear translocation of HER2, enhancing the distinct nuclear function of HER2 that promoted AKT activation and cyclin D1 expression. Co-administration of TZMB and a functional inhibitor of HSP27, J2, significantly reduced the S15/78 phosphorylation of HSP27, which downregulated HER2 and its downstream signals, sensitizing TZMB-refractory cell, and JIMT1-xenograft mouse models to TZMB. Collectively, p-HSP27S15 could serve as a valuable predictive marker and also a therapeutic target for TZMB-resistance.
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