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Klaes S, Madan S, Deobald D, Cooper M, Adrian L. GroEL-Proteotyping of Bacterial Communities Using Tandem Mass Spectrometry. Int J Mol Sci 2023; 24:15692. [PMID: 37958676 PMCID: PMC10649880 DOI: 10.3390/ijms242115692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 11/15/2023] Open
Abstract
Profiling bacterial populations in mixed communities is a common task in microbiology. Sequencing of 16S small subunit ribosomal-RNA (16S rRNA) gene amplicons is a widely accepted and functional approach but relies on amplification primers and cannot quantify isotope incorporation. Tandem mass spectrometry proteotyping is an effective alternative for taxonomically profiling microorganisms. We suggest that targeted proteotyping approaches can complement traditional population analyses. Therefore, we describe an approach to assess bacterial community compositions at the family level using the taxonomic marker protein GroEL, which is ubiquitously found in bacteria, except a few obligate intracellular species. We refer to our method as GroEL-proteotyping. GroEL-proteotyping is based on high-resolution tandem mass spectrometry of GroEL peptides and identification of GroEL-derived taxa via a Galaxy workflow and a subsequent Python-based analysis script. Its advantage is that it can be performed with a curated and extendable sample-independent database and that GroEL can be pre-separated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) to reduce sample complexity, improving GroEL identification while simultaneously decreasing the instrument time. GroEL-proteotyping was validated by employing it on a comprehensive raw dataset obtained through a metaproteome approach from synthetic microbial communities as well as real human gut samples. Our data show that GroEL-proteotyping enables fast and straightforward profiling of highly abundant taxa in bacterial communities at reasonable taxonomic resolution.
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Affiliation(s)
- Simon Klaes
- Department of Environmental Biotechnology, Helmholtz Centre for Environmental Research (UFZ), 04318 Leipzig, Germany; (S.K.); (D.D.)
- Faculty III Process Sciences, Institute of Biotechnology, Chair of Geobiotechnology, Technische Universität Berlin, 13355 Berlin, Germany
| | - Shobhit Madan
- Department of Environmental Biotechnology, Helmholtz Centre for Environmental Research (UFZ), 04318 Leipzig, Germany; (S.K.); (D.D.)
- Faculty of Engineering, Ansbach University of Applied Sciences, 91522 Ansbach, Germany
| | - Darja Deobald
- Department of Environmental Biotechnology, Helmholtz Centre for Environmental Research (UFZ), 04318 Leipzig, Germany; (S.K.); (D.D.)
| | - Myriel Cooper
- Faculty III Process Sciences, Institute of Environmental Technology, Chair of Environmental Microbiology, Technische Universität Berlin, 10587 Berlin, Germany
| | - Lorenz Adrian
- Department of Environmental Biotechnology, Helmholtz Centre for Environmental Research (UFZ), 04318 Leipzig, Germany; (S.K.); (D.D.)
- Faculty III Process Sciences, Institute of Biotechnology, Chair of Geobiotechnology, Technische Universität Berlin, 13355 Berlin, Germany
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2
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Pradhan SS, R SS, Kanikaram SP, V M DD, Pargaonkar A, Dandamudi RB, Sivaramakrishnan V. Metabolic deregulation associated with aging modulates protein aggregation in the yeast model of Huntington's disease. J Biomol Struct Dyn 2023:1-18. [PMID: 37732342 DOI: 10.1080/07391102.2023.2257322] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 09/05/2023] [Indexed: 09/22/2023]
Abstract
Huntington's disease is associated with increased CAG repeat resulting in an expanded polyglutamine tract in the protein Huntingtin (HTT) leading to its aggregation resulting in neurodegeneration. Previous studies have shown that N-terminal HTT with 46Q aggregated in the stationary phase but not the logarithmic phase in the yeast model of HD. We carried out a metabolomic analysis of logarithmic and stationary phase yeast model of HD expressing different polyQ lengths attached to N-terminal HTT tagged with enhanced green fluorescent protein (EGFP). The results show significant changes in the metabolic profile and deregulated pathways in stationary phase cells compared to logarithmic phase cells. Comparison of metabolic pathways obtained from logarithmic phase 46Q versus 25Q with those obtained for presymptomatic HD patients from our previous study and drosophila model of HD showed considerable overlap. The arginine biosynthesis pathway emerged as one of the key pathways that is common in stationary phase yeast compared to logarithmic phase and HD patients. Treatment of yeast with arginine led to a significant decrease, while transfer to arginine drop-out media led to a significant increase in the size of protein aggregates in both logarithmic and stationary phase yeast model of HD. Knockout of arginine transporters in the endoplasmic reticulum and vacuole led to a significant decrease in mutant HTT aggregation. Overall our results highlight arginine as a critical metabolite that modulates the aggregation of mutant HTT and disease progression in HD.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Sai Sanwid Pradhan
- Disease Biology Lab, Department of Biosciences, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Anantapur, Andhra Pradesh, India
| | - Sai Swaroop R
- Disease Biology Lab, Department of Biosciences, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Anantapur, Andhra Pradesh, India
| | - Sai Phalguna Kanikaram
- Disease Biology Lab, Department of Biosciences, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Anantapur, Andhra Pradesh, India
| | - Datta Darshan V M
- Disease Biology Lab, Department of Biosciences, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Anantapur, Andhra Pradesh, India
| | - Ashish Pargaonkar
- Application Division, Agilent Technologies Ltd., Bengaluru, Karnataka, India
| | | | - Venketesh Sivaramakrishnan
- Disease Biology Lab, Department of Biosciences, Sri Sathya Sai Institute of Higher Learning, Prasanthi Nilayam, Anantapur, Andhra Pradesh, India
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3
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Sakamoto N, Okuno D, Tokito T, Yura H, Kido T, Ishimoto H, Tanaka Y, Mukae H. HSP47: A Therapeutic Target in Pulmonary Fibrosis. Biomedicines 2023; 11:2387. [PMID: 37760828 PMCID: PMC10525413 DOI: 10.3390/biomedicines11092387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 08/19/2023] [Accepted: 08/23/2023] [Indexed: 09/29/2023] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a chronic lung disease characterized by a progressive decline in lung function and poor prognosis. The deposition of the extracellular matrix (ECM) by myofibroblasts contributes to the stiffening of lung tissue and impaired oxygen exchange in IPF. Type I collagen is the major ECM component and predominant collagen protein deposited in chronic fibrosis, suggesting that type I collagen could be a target of drugs for fibrosis treatment. Heat shock protein 47 (HSP47), encoded by the serpin peptidase inhibitor clade H, member 1 gene, is a stress-inducible collagen-binding protein. It is an endoplasmic reticulum-resident molecular chaperone essential for the correct folding of procollagen. HSP47 expression is increased in cellular and animal models of pulmonary fibrosis and correlates with pathological manifestations in human interstitial lung diseases. Various factors affect HSP47 expression directly or indirectly in pulmonary fibrosis models. Overall, understanding the relationship between HSP47 expression and pulmonary fibrosis may contribute to the development of novel therapeutic strategies.
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Affiliation(s)
- Noriho Sakamoto
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8501, Japan
| | - Daisuke Okuno
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8501, Japan
| | - Takatomo Tokito
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8501, Japan
| | - Hirokazu Yura
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8501, Japan
| | - Takashi Kido
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8501, Japan
| | - Hiroshi Ishimoto
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8501, Japan
| | - Yoshimasa Tanaka
- Center for Medical Innovation, Nagasaki University, Nagasaki 852-8588, Japan
| | - Hiroshi Mukae
- Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki 852-8501, Japan
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Khatun M, Borphukan B, Alam I, Keya CA, Panditi V, Khan H, Huq S, Reddy MK, Salimullah M. Mitochondria-Targeted SmsHSP24.1 Overexpression Stimulates Early Seedling Vigor and Stress Tolerance by Multi-Pathway Transcriptome-Reprogramming. Front Plant Sci 2021; 12:741898. [PMID: 34887885 PMCID: PMC8649800 DOI: 10.3389/fpls.2021.741898] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 10/06/2021] [Indexed: 06/13/2023]
Abstract
Among the diverse array of heat shock proteins across the three domains of life, mitochondria-targeted small heat shock proteins (sHSPs) are evolved in the plant lineage. However, they remained mysterious and understudied. In this study, we reported a systematic study of a novel mitochondria-targeted nuclear sHSP from eggplant (Solanum melongena L.; SmsHSP24.1). Differential expression of SmsHSP24.1 indicated its positive role exerted during stress conditions. Escherichia coli-BL21 cell line overexpressing the SmsHSP24.1 showed excellent thermo-tolerance ability, tolerating up to 52°C. Spectrometry and electron microscopy revealed a multimeric structure of the protein which acted as a molecular chaperone at high temperatures. Overexpression of SmsHSP24.1 significantly enhanced resistance against heat, drought, and salt stresses and showed rapid germination in constitutively overexpressed eggplant lines. RNA-seq analysis reveals an apparent upregulation of a set of reactive oxygen species (ROS) scavenging enzymes of the glutathione (GHS) pathway and mitochondrial electron transport chain (ETC). Significant upregulation was also observed in auxin biosynthesis and cell-wall remodeling transcripts in overexpressed lines. qPCR, biochemical and physiological analysis further aligned with the finding of transcriptome analysis and suggested an essential role of SmsHSP24.1 under various stress responses and positive physiological influence on the growth of eggplants. Therefore, this gene has immense potential in engineering stress-resilient crop plants.
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Affiliation(s)
- Muslima Khatun
- Plant Biotechnology Division, National Institute of Biotechnology, Dhaka, Bangladesh
| | - Bhabesh Borphukan
- Crop Improvement Group, International Centre for Genetic Engineering and Biotechnology, New Delhi, India
| | - Iftekhar Alam
- Plant Biotechnology Division, National Institute of Biotechnology, Dhaka, Bangladesh
| | - Chaman Ara Keya
- Department of Biochemistry and Microbiology, North South University, Dhaka, Bangladesh
| | - Varakumar Panditi
- Crop Improvement Group, International Centre for Genetic Engineering and Biotechnology, New Delhi, India
| | - Haseena Khan
- Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka, Bangladesh
| | - Saaimatul Huq
- Molecular Biotechnology Division, National Institute of Biotechnology, Dhaka, Bangladesh
| | - Malireddy K. Reddy
- Crop Improvement Group, International Centre for Genetic Engineering and Biotechnology, New Delhi, India
| | - Md. Salimullah
- Molecular Biotechnology Division, National Institute of Biotechnology, Dhaka, Bangladesh
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Abstract
Introduction: Chronic fibrotic disorders are challenging clinical problems. The major challenge is the identification of specific targets expressed selectively in fibrotic tissues. Collagen accumulation is the hallmark fibrosis. HSP47 is a collagen-specific chaperon with critical role in collagen folding. This review discusses the anti-fibrotic potential of HSP47. Areas covered: This review compiles data retrieved from the PubMed database with keywords 'HSP47+fibrosis' from 01/2005 to 06/2020. We examined 1) collagen biology and its role in fibrotic diseases, 2) HSP47 role in fibrosis, 3) HSP47 inhibition strategies and 4) clinical investigations. The identification of the HSP47-collagen binding site led to the development of methods to screen HSP47 inhibitors with anti-fibrotic potential. Specific in vivo delivery systems of HSP47 siRNA to fibrotic tissue reduced collagen production/secretion associated with fibrosis inhibition in preclinical models. This strategy is about to be tested in clinical trials. Expert opinion: As a collagen-specific chaperon, HSP47 is a promising therapeutic target in fibrosis. Preclinical models have shown encouraging anti-fibrotic results. Anti-HSP47 strategies need to be further evaluated in clinical trials. The increase in circulating-HSP47 in lung fibrosis patients highlights the potential of HSP47 as a noninvasive biomarker and may represent an important step toward personalized medicine in fibrotic disorders.
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Affiliation(s)
- Pierre-Simon Bellaye
- Centre George-Franrçois Leclerc, Nuclear Medicine department, Plateforme d'imagerie et de radiothérapie préclinique, 1 rue du professeur Marion, Dijon, France.,Centre de Référence Constitutif des Maladies Pulmonaires Rares de l'Adultes de Dijon, Réseau OrphaLung, Filère RespiFil, Centre Hospitalier Universitaire de Bourgogne , Dijon,France
| | - Olivier Burgy
- Centre de Référence Constitutif des Maladies Pulmonaires Rares de l'Adultes de Dijon, Réseau OrphaLung, Filère RespiFil, Centre Hospitalier Universitaire de Bourgogne , Dijon,France.,INSERM U1231 Department HSP-pathies 7 Boulevard Jeanne d'Arc ,Dijon France
| | - Philippe Bonniaud
- Centre de Référence Constitutif des Maladies Pulmonaires Rares de l'Adultes de Dijon, Réseau OrphaLung, Filère RespiFil, Centre Hospitalier Universitaire de Bourgogne , Dijon,France
| | - Martin Kolb
- McMaster University, Department of medicine, FIRH, 50 Charlton Avenue East, Hamilton , Ontario, Canada
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Geisler M, Hegedűs T. A twist in the ABC: regulation of ABC transporter trafficking and transport by FK506-binding proteins. FEBS Lett 2020; 594:3986-4000. [PMID: 33125703 DOI: 10.1002/1873-3468.13983] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 10/02/2020] [Accepted: 10/15/2020] [Indexed: 01/07/2023]
Abstract
Post-transcriptional regulation of ATP-binding cassette (ABC) proteins has been so far shown to encompass protein phosphorylation, maturation, and ubiquitination. Yet, recent accumulating evidence implicates FK506-binding proteins (FKBPs), a type of peptidylprolyl cis-trans isomerase (PPIase) proteins, in ABC transporter regulation. In this perspective article, we summarize current knowledge on ABC transporter regulation by FKBPs, which seems to be conserved over kingdoms and ABC subfamilies. We uncover striking functional similarities but also differences between regulatory FKBP-ABC modules in plants and mammals. We dissect a PPIase- and HSP90-dependent and independent impact of FKBPs on ABC biogenesis and transport activity. We propose and discuss a putative new mode of transient ABC transporter regulation by cis-trans isomerization of X-prolyl bonds.
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Affiliation(s)
- Markus Geisler
- Department of Biology, University of Fribourg, Switzerland
| | - Tamás Hegedűs
- Department of Biophysics and Radiation Biology, Semmelweis University, Budapest, Hungary
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Miake J. A Novel Treatment for Arrhythmias via the Control of the Degradation of Ion Channel Proteins. Yonago Acta Med 2020; 63:146-153. [PMID: 32884433 DOI: 10.33160/yam.2020.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 06/16/2020] [Indexed: 11/05/2022]
Abstract
Although there are many reports on the regulation of ion channel expression in transcription and translation, few drugs have been studied to influence post-translational modification of ion channel proteins. The Kv1.5 channel is a potassium ion channel expressed in atrial muscle, belongs to the voltage-gated K+ channel superfamily, and forms an ultrarapid delayed rectifier potassium ion current. It is important to understand the fate of these channel proteins, as cardiac Kv1.5 mutations can cause arrhythmias. Disruption of quantitative and qualitative control mechanisms of channels leads to stagnation and degradation of intracellular channel proteins. As a result, ion channel proteins are not transported to the cell membrane and are involved in the development of atrial fibrillation. This review takes the Kv1.5 channel as an example and focuses on the degradation mechanism of ion channel proteins, and discusses its application to the treatment of arrhythmia by drugs that control the mechanism of ion channel protein degradation.
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Affiliation(s)
- Junichiro Miake
- Division of Pharmacology, Department of Pathophysiological and Therapeutic Science, School of Medicine, Faculty of Medicine, Tottori University, Yonago 683-8503, Japan
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Shahrizal M, Daimon Y, Tanaka Y, Hayashi Y, Nakayama S, Iwaki S, Narita SI, Kamikubo H, Akiyama Y, Tsukazaki T. Structural Basis for the Function of the β-Barrel Assembly-Enhancing Protease BepA. J Mol Biol 2018; 431:625-635. [PMID: 30521812 DOI: 10.1016/j.jmb.2018.11.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 11/13/2018] [Accepted: 11/26/2018] [Indexed: 01/26/2023]
Abstract
The β-barrel assembly machinery (BAM) complex mediates the assembly of β-barrel membrane proteins in the outer membrane. BepA, formerly known as YfgC, interacts with the BAM complex and functions as a protease/chaperone for the enhancement of the assembly and/or degradation of β-barrel membrane proteins. To elucidate the molecular mechanism underlying the dual functions of BepA, its full-length three-dimensional structure is needed. Here, we report the crystal structure of full-length BepA at 2.6-Å resolution. BepA possesses an N-terminal protease domain and a C-terminal tetratricopeptide repeat domain, which interact with each other. Domain cross-linking by structure-guided introduction of disulfide bonds did not affect the activities of BepA in vivo, suggesting that the function of this protein does not involve domain rearrangement. The full-length BepA structure is compatible with the previously proposed docking model of BAM complex and tetratricopeptide repeat domain of BepA.
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Affiliation(s)
| | - Yasushi Daimon
- Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto 606-8507, Japan
| | - Yoshiki Tanaka
- Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
| | - Yugo Hayashi
- Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
| | - Shintaro Nakayama
- Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
| | - Shigehiro Iwaki
- Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
| | - Shin-Ichiro Narita
- Faculty of Nutritional Sciences, University of Morioka, Iwate 020-0694, Japan
| | - Hironari Kamikubo
- Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan
| | - Yoshinori Akiyama
- Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto 606-8507, Japan.
| | - Tomoya Tsukazaki
- Nara Institute of Science and Technology, Ikoma, Nara 630-0192, Japan.
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Naser R, Aldehaiman A, Díaz-Galicia E, Arold ST. Endogenous Control Mechanisms of FAK and PYK2 and Their Relevance to Cancer Development. Cancers (Basel) 2018; 10:E196. [PMID: 29891810 PMCID: PMC6025627 DOI: 10.3390/cancers10060196] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 05/31/2018] [Accepted: 06/06/2018] [Indexed: 02/07/2023] Open
Abstract
Focal adhesion kinase (FAK) and its close paralogue, proline-rich tyrosine kinase 2 (PYK2), are key regulators of aggressive spreading and metastasis of cancer cells. While targeted small-molecule inhibitors of FAK and PYK2 have been found to have promising antitumor activity, their clinical long-term efficacy may be undermined by the strong capacity of cancer cells to evade anti-kinase drugs. In healthy cells, the expression and/or function of FAK and PYK2 is tightly controlled via modulation of gene expression, competing alternatively spliced forms, non-coding RNAs, and proteins that directly or indirectly affect kinase activation or protein stability. The molecular factors involved in this control are frequently deregulated in cancer cells. Here, we review the endogenous mechanisms controlling FAK and PYK2, and with particular focus on how these mechanisms could inspire or improve anticancer therapies.
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Affiliation(s)
- Rayan Naser
- King Abdullah University of Science and Technology (KAUST), Computational Bioscience Research Center (CBRC), Division of Biological and Environmental Sciences and Engineering (BESE), Thuwal 23955-6900, Saudi Arabia.
| | - Abdullah Aldehaiman
- King Abdullah University of Science and Technology (KAUST), Computational Bioscience Research Center (CBRC), Division of Biological and Environmental Sciences and Engineering (BESE), Thuwal 23955-6900, Saudi Arabia.
| | - Escarlet Díaz-Galicia
- King Abdullah University of Science and Technology (KAUST), Computational Bioscience Research Center (CBRC), Division of Biological and Environmental Sciences and Engineering (BESE), Thuwal 23955-6900, Saudi Arabia.
| | - Stefan T Arold
- King Abdullah University of Science and Technology (KAUST), Computational Bioscience Research Center (CBRC), Division of Biological and Environmental Sciences and Engineering (BESE), Thuwal 23955-6900, Saudi Arabia.
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Abstract
INTRODUCTION The 70-kDa heat shock protein (Hsp70) is a cytosolic chaperone which facilitates protein folding, degradation, complex assembly, and translocation. Following stroke, these functions have the potential to lead to cytoprotection, and this has been demonstrated using genetic mutant models, direct gene transfer or the induction of Hsp70 via heat stress, approaches which limit its translational utility. Recently, the investigation of Hsp70-inducing pharmacological compounds, which, through their ability to inhibit Hsp90, has obvious clinical implications in terms of potential therapies to mitigate cell death and inflammation, and lead to neuroprotection from brain injury. Areas covered: In this review, we will focus on the role of Hsp70 in cell death and inflammation, and the current literature surrounding the pharmacological induction in acute ischemic stroke models with comments on potential applications at the clinical level. Expert opinion: Such neuroprotectants could be used to synergistically improve neurological outcome or to extend the time window of existing interventions, thus increasing the numbers of stroke victims eligible for treatment.
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Affiliation(s)
- Jong Youl Kim
- a Department of Anatomy , Yonsei University College of Medicine , Seoul , Republic of Korea
| | - Yeonseung Han
- a Department of Anatomy , Yonsei University College of Medicine , Seoul , Republic of Korea
| | - Jong Eun Lee
- a Department of Anatomy , Yonsei University College of Medicine , Seoul , Republic of Korea.,b BK21 Plus Project for Medical Science and Brain Research Institute , Yonsei University College of Medicine , Seoul , Republic of Korea
| | - Midori A Yenari
- c Department of Neurology , University of California, San Francisco & the San Francisco Veterans Affairs Medical Center , San Francisco , CA , USA
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Voisset C, Blondel M, Jones GW, Friocourt G, Stahl G, Chédin S, Béringue V, Gillet R. The double life of the ribosome: When its protein folding activity supports prion propagation. Prion 2017; 11:89-97. [PMID: 28362551 DOI: 10.1080/19336896.2017.1303587] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
It is no longer necessary to demonstrate that ribosome is the central machinery of protein synthesis. But it is less known that it is also key player of the protein folding process through another conserved function: the protein folding activity of the ribosome (PFAR). This ribozyme activity, discovered more than 2 decades ago, depends upon the domain V of the large rRNA within the large subunit of the ribosome. Surprisingly, we discovered that anti-prion compounds are also potent PFAR inhibitors, highlighting an unexpected link between PFAR and prion propagation. In this review, we discuss the ancestral origin of PFAR in the light of the ancient RNA world hypothesis. We also consider how this ribosomal activity fits into the landscape of cellular protein chaperones involved in the appearance and propagation of prions and other amyloids in mammals. Finally, we examine how drugs targeting the protein folding activity of the ribosome could be active against mammalian prion and other protein aggregation-based diseases, making PFAR a promising therapeutic target for various human protein misfolding diseases.
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Affiliation(s)
- Cécile Voisset
- a Inserm UMR 1078 , Université de Bretagne Occidentale, Faculté de Médecine et des Sciences de la Santé, Etablissement Français du Sang (EFS) Bretagne, CHRU Brest, Hôpital Morvan, Laboratoire de Génétique Moléculaire , Brest , France
| | - Marc Blondel
- a Inserm UMR 1078 , Université de Bretagne Occidentale, Faculté de Médecine et des Sciences de la Santé, Etablissement Français du Sang (EFS) Bretagne, CHRU Brest, Hôpital Morvan, Laboratoire de Génétique Moléculaire , Brest , France
| | - Gary W Jones
- b School of Clinical and Applied Sciences , Faculty of Health and Social Sciences, Leeds Beckett University , Leeds , UK
| | - Gaëlle Friocourt
- a Inserm UMR 1078 , Université de Bretagne Occidentale, Faculté de Médecine et des Sciences de la Santé, Etablissement Français du Sang (EFS) Bretagne, CHRU Brest, Hôpital Morvan, Laboratoire de Génétique Moléculaire , Brest , France
| | - Guillaume Stahl
- c Laboratoire de Biologie Moléculaire Eucaryotes , CNRS, Université de Toulouse , Toulouse , France
| | - Stéphane Chédin
- d Institute for Integrative Biology of the Cell (I2BC), UMR 9198, CEA, CNRS, Université Paris-Sud, CEA/Saclay, SBIGeM , Gif-sur-Yvette , France
| | | | - Reynald Gillet
- f Université de Rennes 1, CNRS UMR 6290 IGDR , Rennes , France
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Musilova I, Andrys C, Drahosova M, Soucek O, Kutova R, Pliskova L, Spacek R, Laudanski P, Jacobsson B, Kacerovsky M. Amniotic fluid calreticulin in pregnancies complicated by the preterm prelabor rupture of membranes. J Matern Fetal Neonatal Med 2016; 29:3921-9. [PMID: 26953684 DOI: 10.3109/14767058.2016.1154940] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
OBJECTIVE This study aimed to determine the amniotic fluid calreticulin concentrations in women with the preterm prelabor rupture of membranes (PPROM) based on the microbial invasion of the amniotic cavity (MIAC), intraamniotic inflammation (IAI) and microbial-associated IAI. METHODS One hundred sixty-eight women with singleton pregnancies were included in this study. Amniotic fluid samples were obtained by transabdominal amniocentesis and were assayed for calreticulin concentrations by ELISA. IAI was defined as an amniotic fluid interleukin-6 concentration > 745 pg/ml. Microbial-associated IAI was defined as the presence of both MIAC and IAI. RESULT Women with MIAC (with MIAC: median 54.4 ng/ml, versus without MIAC: median 32.6 ng/ml; p < 0.0001), IAI (with IAI: median 66.8 ng/ml, versus without IAI: median 33.0 ng/ml; p < 0.0001) and microbial-associated IAI (with microbial-associated IAI: median 82.5 ng/ml, versus without microbial-associated IAI: median 33.7 ng/ml; p < 0.0001) had higher concentrations of calreticulin than women without these complications. An amniotic fluid calreticulin concentration of 81.4 ng/ml was found to be the best cutoff point for identifying women with microbial-associated IAI. CONCLUSIONS The presence of microbial-associated IAI is associated with increased amniotic fluid calreticulin concentrations. Calreticulin seems to be a promising marker for the early identification of PPROM complicated by microbial-associated IAI.
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Affiliation(s)
- Ivana Musilova
- a Department of Obstetrics and Gynecology , Faculty of Medicine Hradec Kralove, Charles University in Prague , Hradec Kralove , Czech Republic
| | - Ctirad Andrys
- b Department of Clinical Immunology and Allergy , Faculty of Medicine Hradec Kralove, University Hospital Hradec Kralove , Hradec Kralove , Czech Republic
| | - Marcela Drahosova
- b Department of Clinical Immunology and Allergy , Faculty of Medicine Hradec Kralove, University Hospital Hradec Kralove , Hradec Kralove , Czech Republic
| | - Ondrej Soucek
- b Department of Clinical Immunology and Allergy , Faculty of Medicine Hradec Kralove, University Hospital Hradec Kralove , Hradec Kralove , Czech Republic
| | - Radka Kutova
- c Institute of Clinical Biochemistry and Diagnostics, University Hospital Hradec Kralove , Hradec Kralove , Czech Republic
| | - Lenka Pliskova
- c Institute of Clinical Biochemistry and Diagnostics, University Hospital Hradec Kralove , Hradec Kralove , Czech Republic
| | - Richard Spacek
- d Department of Obstetrics and Gynecology , University Hospital Ostrava , Ostrava , Czech Republic
| | - Piotr Laudanski
- e Department of Perinatology , Medical University of Bialystok , Bialystok , Poland
| | - Bo Jacobsson
- f Department of Obstetrics and Gynecology , Sahlgrenska Academy, Gothenburg University , Gothenburg , Sweden .,g Department of Genes and Environment , Division of Epidemiology, Norwegian Institute of Public Health , Oslo , Norway , and
| | - Marian Kacerovsky
- a Department of Obstetrics and Gynecology , Faculty of Medicine Hradec Kralove, Charles University in Prague , Hradec Kralove , Czech Republic .,h Biomedical Research Center, University Hospital Hradec Kralove , Hradec Kralove , Czech Republic
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Satoh T, Ohba A, Liu Z, Inagaki T, Satoh AK. dPob/EMC is essential for biosynthesis of rhodopsin and other multi-pass membrane proteins in Drosophila photoreceptors. eLife 2015; 4. [PMID: 25715730 PMCID: PMC4341237 DOI: 10.7554/elife.06306] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Accepted: 01/26/2015] [Indexed: 12/22/2022] Open
Abstract
In eukaryotes, most integral membrane proteins are synthesized, integrated into the membrane, and folded properly in the endoplasmic reticulum (ER). We screened the mutants affecting rhabdomeric expression of rhodopsin 1 (Rh1) in the Drosophila photoreceptors and found that dPob/EMC3, EMC1, and EMC8/9, Drosophila homologs of subunits of ER membrane protein complex (EMC), are essential for stabilization of immature Rh1 in an earlier step than that at which another Rh1-specific chaperone (NinaA) acts. dPob/EMC3 localizes to the ER and associates with EMC1 and calnexin. Moreover, EMC is required for the stable expression of other multi-pass transmembrane proteins such as minor rhodopsins Rh3 and Rh4, transient receptor potential, and Na+K+-ATPase, but not for a secreted protein or type I single-pass transmembrane proteins. Furthermore, we found that dPob/EMC3 deficiency induces rhabdomere degeneration in a light-independent manner. These results collectively indicate that EMC is a key factor in the biogenesis of multi-pass transmembrane proteins, including Rh1, and its loss causes retinal degeneration. DOI:http://dx.doi.org/10.7554/eLife.06306.001 The membranes that surround cells contain many proteins, and those that span the entire width of the membrane are known as transmembrane proteins. Rhodopsin is one such transmembrane protein that is found in the light-sensitive ‘photoreceptor’ cells of the eye, where it plays an essential role in vision. Transmembrane proteins are made inside the cell and are inserted into the membrane surrounding a compartment called the endoplasmic reticulum. Here, they mature and ‘fold’ into their correct three-dimensional shape with help from chaperone proteins. Once correctly folded, the transmembrane proteins can be transported to the cell membrane. Incorrect folding of proteins can have severe consequences; if rhodopsin is incorrectly folded the photoreceptor cells can die, leading to blindness in humans and other animals. Experiments carried out in zebrafish have shown that the chaperone protein Pob is required for the survival of photoreceptor cells. Pob is part of a group or ‘complex’ of chaperone proteins in the endoplasmic reticulum called the EMC complex. This suggests that the EMC complex may be involved in folding rhodopsin, but the details remain unclear. Here, Satoh et al. studied the role of the EMC complex in the folding of rhodopsin in fruit flies. This involved examining hundreds of flies that carried a variety of genetic mutations and that also had low levels of rhodopsin. The experiments show that dPob—the fly version of Pob—and two other proteins in the EMC complex are required for newly-made rhodopsin to be stabilized. If photoreceptor cells are missing proteins from the complex, the light-sensitive structures in the eye degenerate. Rhodopsin is known as a ‘multi-pass’ membrane protein because it crosses the membrane multiple times. Satoh et al. found that the EMC complex is also required for the folding of other multi-pass membrane proteins in photoreceptor cells. The next challenge will be to reveal how the EMC complex is able to specifically target this type of transmembrane protein. DOI:http://dx.doi.org/10.7554/eLife.06306.002
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Affiliation(s)
- Takunori Satoh
- Graduate School of Integrated Arts and Science, Hiroshima University, Higashi-Hiroshima, Japan
| | - Aya Ohba
- Graduate School of Integrated Arts and Science, Hiroshima University, Higashi-Hiroshima, Japan
| | - Ziguang Liu
- Institute of Animal Husbandry, Heilongjiang Academy of Agricultural Sciences, Harbin, China
| | - Tsuyoshi Inagaki
- Graduate School of Integrated Arts and Science, Hiroshima University, Higashi-Hiroshima, Japan
| | - Akiko K Satoh
- Graduate School of Integrated Arts and Science, Hiroshima University, Higashi-Hiroshima, Japan
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Li W, Xu F, Chen S, Zhang Z, Zhao Y, Jin Y, Li M, Zhu Y, Liu Y, Yang Y, Deng X. A comparative study on Ca content and distribution in two Gesneriaceae species reveals distinctive mechanisms to cope with high rhizospheric soluble calcium. Front Plant Sci 2014; 5:647. [PMID: 25477893 PMCID: PMC4238373 DOI: 10.3389/fpls.2014.00647] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 11/02/2014] [Indexed: 05/09/2023]
Abstract
Excessive Ca is toxic to plants thus significantly affects plant growth and species distribution in Ca-rich karst areas. To understand how plants survive high Ca soil, laboratory experiments were established to compare the physiological responses and internal Ca distribution in organ, tissue, cell, and intracellular levels under different Ca levels for Lysionotus pauciflorus and Boea hygrometrica, two karst habitant Gesneriaceae species in Southwest China. In the controlled condition, L. pauciflorus could survive as high as 200 mM rhizospheric soluble Ca, attributed to a series of physiological responses and preferential storage that limited Ca accumulation in chloroplasts of palisade cells. In contrast, B. hygrometrica could survive only 20 mM rhizospheric soluble Ca, but accumulated a high level of internal Ca in both palisade and spongy cells without disturbance on photosynthetic activity. By phenotype screening of transgenic plants expressing high Ca-inducible genes from B. hygrometrica, the expression of BhDNAJC2 in A. thaliana was found to enhance plant growth and photosynthesis under high soluble Ca stress. BhDNAJC2 encodes a recently reported heat shock protein (HSP) 40 family DnaJ-domain protein. The Ca-resistant phenotype of BhDNAJC2 highlights the important role of chaperone-mediated protein quality control in Ca tolerance in B. hygrometrica. Taken together, our results revealed that distinctive mechanisms were employed in the two Gesneriaceae karst habitants to cope with a high Ca environment.
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Affiliation(s)
- Wenlong Li
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, The Chinese Academy of SciencesBeijing, China
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of SciencesBeijing, China
- College of Life Sciences, University of Chinese Academy of SciencesBeijing, China
| | - Falun Xu
- Key Laboratory of Bio-Resource and Eco-Environment, Ministry of Education, College of Life Sciences, Sichuan UniversityChengdu, China
| | - Shixuan Chen
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, The Chinese Academy of SciencesBeijing, China
| | - Zhennan Zhang
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, The Chinese Academy of SciencesBeijing, China
| | - Yan Zhao
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, The Chinese Academy of SciencesBeijing, China
| | - Yukuan Jin
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, The Chinese Academy of SciencesBeijing, China
| | - Meijing Li
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, The Chinese Academy of SciencesBeijing, China
| | - Yan Zhu
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, The Chinese Academy of SciencesBeijing, China
| | - Yongxiu Liu
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of SciencesBeijing, China
| | - Yi Yang
- Key Laboratory of Bio-Resource and Eco-Environment, Ministry of Education, College of Life Sciences, Sichuan UniversityChengdu, China
| | - Xin Deng
- Key Laboratory of Plant Resources and Beijing Botanical Garden, Institute of Botany, The Chinese Academy of SciencesBeijing, China
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15
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Marcus RA. Theory of mass-independent fractionation of isotopes, phase space accessibility, and a role of isotopic symmetry. Proc Natl Acad Sci U S A 2013; 110:17703-7. [PMID: 23812747 DOI: 10.1073/pnas.1213080110] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Key experimental and theoretical features of mass-independent fractionation (MIF) of isotopes, also known as the η-effect, are summarized, including its difference from the exit channel zero-point energy difference effect. The latter exactly cancels in the MIF. One key experimental result is that the MIF for O3 formation is a low-pressure phenomenon and, moreover, that it decreases with increasing pressure of third bodies at pressures far below the "Lindemann fall-off" pressures for three-body recombination of O and O2. A possible origin of the MIF is discussed in terms of a role for isotopologue symmetry in intramolecular energy sharing. An explanation is suggested for the large difference in the fall-off pressure for recombination and the pressure for a large decrease in MIF, in terms of a difference between deactivating collisions and what we term here "symmetry-changing collisions". It is noted that the theory of the MIF involves four recombination rate constants and an equilibrium constant, for each trace isotope, seven rate constants in all and two equilibrium constants. A conceptual shortcut is noted. Experimental and computational information that may provide added insight into the MIF mechanism and tests is described.
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