Abstract
Small heat shock proteins (sHSPs), often known as molecular chaperones, are most prevalent in nature. Under certain stress-induced conditions, these sHSPs act as an ATP-independent variation and thus prevent the inactivation of various non-native substrate proteins and their aggregation. They also assist other ATP-dependent chaperones in the refolding of these substrates. In the case of prokaryotes and lower eukaryotes, the chaperone functions of sHSPs can bind a wide range of cellular proteins but preferentially protect translation-related proteins and metabolic enzymes. Eukaryotes usually encode a larger number of sHSPs than those of prokaryotes. The chaperone functions of mammalian sHSPs are regulated by phosphorylation in cells and also by temperature. Their sHSPs have different sub-cellular compartments and cell/tissue specificity. The substrate proteins of mammalian sHSPs or eukaryotic sHSPs accordingly reflect their multi-cellular complexity. The sHSPs of animals play roles in different physiological processes as cell differentiation, apoptosis, and longevity. In this work, the characterization, location, tissue specificity, and functional diversity of sHSPs from seven different mammalian species with special emphasis on humans have been studied. Through this extensive work, a novel and significant attempt have been made to classify them based on their omnipresence, tissue specificity, localization, secondary structure, probable mutations, and evolutionary significance.
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Acknowledgments
The authors acknowledge the help from the DBT-funded BIF (Bioinformatics facility center), University of Kalyani, West Bengal are also acknowledged for furnishing all the necessary infrastructural facilities to pursue the whole study.
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The research work is supported by the Department of Science and Technology and Biotechnology of West Bengal Govt. who rendered required financial support to carry on with the research works through R&D project SA. No./ST/P/S&T/1-G14/2018. Financial support was also provided by UGC-SAP-DSR-II and DST-PURSE-2.
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AB and RDG devised the project. SM performed the experimentations. All the authors wrote the manuscript and agreed to submit the manuscript.
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Mitra, S., Bagchi, A. & Dasgupta, R. Elucidation of Diverse Physico-Chemical Parameters in Mammalian Small Heat Shock Proteins: A Comprehensive Classification and Structural and Functional Exploration Using In Silico Approach. Appl Biochem Biotechnol 193, 1836–1852 (2021). https://doi.org/10.1007/s12010-021-03497-w
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DOI: https://doi.org/10.1007/s12010-021-03497-w