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Milani A, Akbari E, Pordanjani PM, Jamshidi F, Ghayoumi S, Sadeghi SA, Bolhassani A. Immunostimulatory effects of Hsp70 fragments and Hsp27 in design of novel HIV-1 vaccine formulations. HIV Med 2024; 25:276-290. [PMID: 37936563 DOI: 10.1111/hiv.13576] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 10/23/2023] [Indexed: 11/09/2023]
Abstract
BACKGROUND Heat shock proteins (HSPs) as an adjuvant induce antigen-specific immunity through facilitating antigen presentation and stimulating T cells. In this study, the immunostimulatory properties of two major fragments of Hsp70 (N-Hsp70(aa 1-387) with ATPase property and C-Hsp70 (aa 508-641) with peptide-binding capacity) and the full length of Hsp27 as vaccine adjuvants were evaluated to boost HIV-1 Nef antigen-specific immunity in both in vitro and in vivo experiments. METHODS At first, the nanoparticles harbouring DNA fusion constructs (i.e. N-Hsp70-Nef, C-Hsp70-Nef and Hsp27-Nef) complexed with HIV Rev (34-50) cell-penetrating peptide were generated to deliver DNA into the cells. Then, the recombinant Nef, Hsp27-Nef, N-Hsp70-Nef and C-Hsp70-Nef proteins were generated in E.coli expression system. Next, the immunostimulatory properties of these fusion constructs were evaluated in both in vitro and in vivo studies. Finally, the secretion of main cytokines from single-cycle replicable (SCR) HIV-1 virion-exposed splenocytes was investigated. RESULTS Our data showed that the stable and non-toxic DNA/Rev nanoparticles could successfully deliver the genes of interest into the cells. Moreover, higher secretion of antibodies and cytokines was detected in mice receiving the Hsp-Nef constructs than in mice receiving Nef antigen. The C-Hsp70 was also superior for inducing Nef-specific Th1 and CTL immunity compared with N-Hsp70 and Hsp27. The T-cell activity was maintained in the SCR-exposed splenocytes, especially the splenocytes of mice receiving the C-Hsp70-Nef regimen. CONCLUSION Altogether, these findings demonstrate the significance of Hsps as enhancers of antigen-specific immunity. Notably, the C-Hsp70 region showed better adjuvant properties for inducing cellular immunity in the improvement of HIV-1 therapeutic vaccines.
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Affiliation(s)
- Alireza Milani
- Department of Hepatitis and AIDS, Pasteur Institute of Iran, Tehran, Iran
| | - Elahe Akbari
- Department of Hepatitis and AIDS, Pasteur Institute of Iran, Tehran, Iran
| | | | - Fateme Jamshidi
- Department of Hepatitis and AIDS, Pasteur Institute of Iran, Tehran, Iran
- Iranian Comprehensive Hemophilia Care Center, Tehran, Iran
| | - Shahrzad Ghayoumi
- Department of Hepatitis and AIDS, Pasteur Institute of Iran, Tehran, Iran
- Iranian Comprehensive Hemophilia Care Center, Tehran, Iran
| | - Seyed Amir Sadeghi
- Department of Hepatitis and AIDS, Pasteur Institute of Iran, Tehran, Iran
| | - Azam Bolhassani
- Department of Hepatitis and AIDS, Pasteur Institute of Iran, Tehran, Iran
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Wang C, Teng L, Liu ZS, Kamalova A, McMenimen KA. HspB5 Chaperone Structure and Activity Are Modulated by Chemical-Scale Interactions in the ACD Dimer Interface. Int J Mol Sci 2023; 25:471. [PMID: 38203641 PMCID: PMC10778692 DOI: 10.3390/ijms25010471] [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: 11/20/2023] [Revised: 12/24/2023] [Accepted: 12/27/2023] [Indexed: 01/12/2024] Open
Abstract
Small heat shock proteins (sHsps) are a family of ATP-independent molecular chaperones that function as "holdases" and prevent protein aggregation due to changes in temperature, pH, or oxidation state. sHsps have a conserved α-crystallin domain (ACD), which forms the dimer building block, flanked by variable N- and C-terminal regions. sHsps populate various oligomeric states as a function of their sequestrase activity, and these dynamic structural features allow the proteins to interact with a plethora of cellular substrates. However, the molecular mechanisms of their dynamic conformational assembly and the interactions with various substrates remains unclear. Therefore, it is important to gain insight into the underlying physicochemical properties that influence sHsp structure in an effort to understand their mechanism(s) of action. We evaluated several disease-relevant mutations, D109A, F113Y, R116C, R120G, and R120C, in the ACD of HspB5 for changes to in vitro chaperone activity relative to that of wildtype. Structural characteristics were also evaluated by ANS fluorescence and CD spectroscopy. Our results indicated that mutation Y113F is an efficient holdase, while D109A and R120G, which are found in patients with myofibrillar myopathy and cataracts, respectively, exhibit a large reduction in holdase activity in a chaperone-like light-scattering assay, which indicated alterations in substrate-sHsp interactions. The extent of the reductions in chaperone activities are different among the mutants and specific to the substrate protein, suggesting that while sHsps are able to interact with many substrates, specific interactions provide selectivity for some substrates compared to others. This work is consistent with a model for chaperone activity where key electrostatic interactions in the sHsp dimer provide structural stability and influence both higher-order sHsp interactions and facilitate interactions with substrate proteins that define chaperone holdase activity.
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Affiliation(s)
- Chenwei Wang
- Program in Biochemistry, Mount Holyoke College, South Hadley, MA 01075, USA; (C.W.); (L.T.); (Z.S.L.)
| | - Lilong Teng
- Program in Biochemistry, Mount Holyoke College, South Hadley, MA 01075, USA; (C.W.); (L.T.); (Z.S.L.)
| | - Zhiyan Silvia Liu
- Program in Biochemistry, Mount Holyoke College, South Hadley, MA 01075, USA; (C.W.); (L.T.); (Z.S.L.)
| | - Aichurok Kamalova
- Program in Neuroscience and Behavior, Mount Holyoke College, South Hadley, MA 01075, USA;
| | - Kathryn A. McMenimen
- Program in Biochemistry, Mount Holyoke College, South Hadley, MA 01075, USA; (C.W.); (L.T.); (Z.S.L.)
- Program in Neuroscience and Behavior, Mount Holyoke College, South Hadley, MA 01075, USA;
- Department of Chemistry, Mount Holyoke College, South Hadley, MA 01075, USA
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Kim YH, Hwang JS, Yoon IN, Lee JH, Lee J, Park KC, Seok H, Kim H. The insect peptide CopA3 blocks programmed cell death by directly binding caspases and inhibiting their proteolytic activation. Biochem Biophys Res Commun 2021; 547:82-88. [PMID: 33610044 DOI: 10.1016/j.bbrc.2021.01.107] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Accepted: 01/28/2021] [Indexed: 11/29/2022]
Abstract
Caspases play essential roles in apoptotic processes, which is necessary for cellular homeostasis. However, over-activation of caspases and subsequent excessive apoptosis is considered a main cause of Parkinson's disease and liver diseases. Here, we found that the insect-derived peptide, CopA3, which has shown antiapoptotic effects in many apoptosis models, directly binds to caspases. The resulting complexes do not dissociate during denaturing polyacrylamide gel electrophoresis, as evidenced by a distinct shift in the migration of caspase reflecting an increase in their molecular weight. Surface plasmon resonance and experiment using cysteine-substituted mutants of CopA3 collectively revealed that binding of CopA3 to caspases is dependent on an internal cysteine residue. Notably, CopA3 binding significantly inhibited proteolytic activation of downstream caspases by upstream caspases. In summary, the demonstration that CopA3 directly binds to caspases and inhibits their activating cleavage suggests a possible therapeutic approach for treating human diseases resulting from uncontrolled apoptosis.
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Affiliation(s)
- Young Ha Kim
- Department of Life Science, College of Natural Science, Daejin University, Pocheon, Gyeonggido, 487-711, Republic of Korea
| | - Jae Sam Hwang
- Department of Agricultural Biology, National Academy of Agricultural Science, RDA, Suwon, 441-707, Republic of Korea
| | - I Na Yoon
- Department of Life Science, College of Natural Science, Daejin University, Pocheon, Gyeonggido, 487-711, Republic of Korea
| | - Joon Ha Lee
- Department of Agricultural Biology, National Academy of Agricultural Science, RDA, Suwon, 441-707, Republic of Korea
| | - Junguee Lee
- Department of Pathology, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Daeheung-ro 64, Jung-gu, Daejeon, 301-723, Republic of Korea
| | - Ki Cheol Park
- Clinical Research Institute, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Daejeon, Republic of Korea
| | - Heon Seok
- Korea Brain Bank, Korea Brain Research Institute, Daegu, 41062, Republic of Korea
| | - Ho Kim
- Department of Life Science, College of Natural Science, Daejin University, Pocheon, Gyeonggido, 487-711, Republic of Korea.
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Mahmoudi Gomari M, Saraygord-Afshari N, Farsimadan M, Rostami N, Aghamiri S, Farajollahi MM. Opportunities and challenges of the tag-assisted protein purification techniques: Applications in the pharmaceutical industry. Biotechnol Adv 2020; 45:107653. [PMID: 33157154 DOI: 10.1016/j.biotechadv.2020.107653] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [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: 05/31/2020] [Revised: 10/22/2020] [Accepted: 10/29/2020] [Indexed: 01/16/2023]
Abstract
Tag-assisted protein purification is a method of choice for both academic researches and large-scale industrial demands. Application of the purification tags in the protein production process can help to save time and cost, but the design and application of tagged fusion proteins are challenging. An appropriate tagging strategy must provide sufficient expression yield and high purity for the final protein products while preserving their native structure and function. Thanks to the recent advances in the bioinformatics and emergence of high-throughput techniques (e.g. SEREX), many new tags are introduced to the market. A variety of interfering and non-interfering tags have currently broadened their application scope beyond the traditional use as a simple purification tool. They can take part in many biochemical and analytical features and act as solubility and protein expression enhancers, probe tracker for online visualization, detectors of post-translational modifications, and carrier-driven tags. Given the variability and growing number of the purification tags, here we reviewed the protein- and peptide-structured purification tags used in the affinity, ion-exchange, reverse phase, and immobilized metal ion affinity chromatographies. We highlighted the demand for purification tags in the pharmaceutical industry and discussed the impact of self-cleavable tags, aggregating tags, and nanotechnology on both the column-based and column-free purification techniques.
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Affiliation(s)
- Mohammad Mahmoudi Gomari
- Department of Medical Biotechnology, Faculty of Allied Medical Sciences, Iran University of Medical Sciences, Tehran, Iran
| | - Neda Saraygord-Afshari
- Department of Medical Biotechnology, Faculty of Allied Medical Sciences, Iran University of Medical Sciences, Tehran, Iran.
| | - Marziye Farsimadan
- Department of Biology, Faculty of Sciences, University of Guilan, Rasht, Iran
| | - Neda Rostami
- Department of Chemical Engineering, Faculty of Engineering, Arak University, Iran
| | - Shahin Aghamiri
- Student research committee, Department of medical biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad M Farajollahi
- Department of Medical Biotechnology, Faculty of Allied Medical Sciences, Iran University of Medical Sciences, Tehran, Iran
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Kojima R, Uchiya K, Manshio H, Masuda K. Cell-free synthesis of functionally active HSPB5. Cell Stress Chaperones 2020; 25:287-301. [PMID: 31960264 PMCID: PMC7058722 DOI: 10.1007/s12192-020-01073-5] [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: 09/04/2019] [Revised: 01/13/2020] [Accepted: 01/15/2020] [Indexed: 10/25/2022] Open
Abstract
Human αB-crystallin (HSPB5) is frequently modified post-translationally by UV radiation, oxidation, and age-associated processes, which complicates functional analyses of the protein using natural sources. Thus, determining the biological function of HSPB5 at the molecular structure level requires unmodified protein. Here, we employed an Escherichia coli cell-free protein synthesis system to prepare unmodified, functionally active human HSPB5. An S30 extract prepared from E. coli strain BL21 (DE3) was used for HSPB5 synthesis. The efficacy of protein synthesis was assessed by monitoring influencing factors, such as the concentrations of Mg2+ and other reaction mixture constituents, and by evaluating batch and/or dialysis synthesis systems. Chaperone-like activity of synthesized HSPB5 was assayed using alcohol dehydrogenase (ADH) under thermal stress. The amount of HSPB5 synthesized using the cell-free system depended significantly on the concentration of Mg2+ in the reaction mixture. Use of condensed S30 extract and increased levels of amino acids promoted HSPB5 production. Compared with the batch system, HSPB5 synthesis was markedly increased using the dialysis system. The construction vector played a critical role in regulating the efficacy of protein synthesis. HSPB5 synthesized using the cell-free system had a native molecular mass, as determined by mass spectrometry analysis. The co-presence of synthesized HSPB5 suppressed heat-associated denaturation of ADH. Human HSPB5 synthesized using the cell-free system thus retains functional activity as a molecular chaperone.
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Affiliation(s)
- Ryoji Kojima
- Laboratory of Analytical Pharmacology, Meijo University, Nagoya, 468-8503, Japan.
| | - Keiichi Uchiya
- Laboratory of Microbiology, Faculty of Pharmacy, Meijo University, Nagoya, 468-8503, Japan
| | - Hiroyuki Manshio
- Laboratory of Analytical Pharmacology, Meijo University, Nagoya, 468-8503, Japan
| | - Kastuyoshi Masuda
- Suntory Institute for Bioorganic Research, 1-1 Wakayamadai, Shimamoto, Osaka, 618-8503, Japan
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Gliniewicz EF, Chambers KM, De Leon ER, Sibai D, Campbell HC, McMenimen KA. Chaperone-like activity of the N-terminal region of a human small heat shock protein and chaperone-functionalized nanoparticles. Proteins 2019; 87:401-415. [PMID: 30684363 DOI: 10.1002/prot.25662] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 11/26/2018] [Revised: 01/03/2019] [Accepted: 01/22/2019] [Indexed: 11/10/2022]
Abstract
Small heat shock proteins (sHsps) are molecular chaperones employed to interact with a diverse range of substrates as the first line of defense against cellular protein aggregation. The N-terminal region (NTR) is implicated in defining features of sHsps; notably in their ability to form dynamic and polydisperse oligomers, and chaperone activity. The physiological relevance of oligomerization and chemical-scale mode(s) of chaperone function remain undefined. We present novel chemical tools to investigate chaperone activity and substrate specificity of human HspB1 (B1NTR), through isolation of B1NTR and development of peptide-conjugated gold nanoparticles (AuNPs). We demonstrate that B1NTR exhibits chaperone capacity for some substrates, determined by anti-aggregation assays and size-exclusion chromatography. The importance of protein dynamics and multivalency on chaperone capacity was investigated using B1NTR-conjugated AuNPs, which exhibit concentration-dependent chaperone activity for some substrates. Our results implicate sHsp NTRs in chaperone activity, and demonstrate the therapeutic potential of sHsp-AuNPs in rescuing aberrant protein aggregation.
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Affiliation(s)
- Emily F Gliniewicz
- Department of Chemistry, Mount Holyoke College, South Hadley, Massachusetts
| | - Kelly M Chambers
- Department of Chemistry, Mount Holyoke College, South Hadley, Massachusetts
| | | | - Diana Sibai
- Department of Chemistry, Mount Holyoke College, South Hadley, Massachusetts
| | - Helen C Campbell
- Department of Chemistry, Mount Holyoke College, South Hadley, Massachusetts
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Freilich R, Betegon M, Tse E, Mok SA, Julien O, Agard DA, Southworth DR, Takeuchi K, Gestwicki JE. Competing protein-protein interactions regulate binding of Hsp27 to its client protein tau. Nat Commun 2018; 9:4563. [PMID: 30385828 DOI: 10.1038/s41467-018-07012-4] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 10/08/2018] [Indexed: 01/17/2023] Open
Abstract
Small heat shock proteins (sHSPs) are a class of oligomeric molecular chaperones that limit protein aggregation. However, it is often not clear where sHSPs bind on their client proteins or how these protein-protein interactions (PPIs) are regulated. Here, we map the PPIs between human Hsp27 and the microtubule-associated protein tau (MAPT/tau). We find that Hsp27 selectively recognizes two aggregation-prone regions of tau, using the conserved β4-β8 cleft of its alpha-crystallin domain. The β4-β8 region is also the site of Hsp27–Hsp27 interactions, suggesting that competitive PPIs may be an important regulatory paradigm. Indeed, we find that each of the individual PPIs are relatively weak and that competition for shared sites seems to control both client binding and Hsp27 oligomerization. These findings highlight the importance of multiple, competitive PPIs in the function of Hsp27 and suggest that the β4-β8 groove acts as a tunable sensor for clients. Small heat shock proteins (sHSPs) limit the aggregation of proteins, such as tau. Here the authors show that Hsp27 recognizes two aggregation-prone regions of tau and that this interaction competes with Hsp27 oligomerization.
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Xu S, Qiu M, Zhang X, Chen J. Expression and characterization of an enhanced recombinant heparinase I with chitin binding domain. Int J Biol Macromol 2017; 105:1250-8. [DOI: 10.1016/j.ijbiomac.2017.07.158] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 07/18/2017] [Accepted: 07/26/2017] [Indexed: 01/01/2023]
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