Abstract
A worldwide pandemic that started in China in late 2019 was caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), a single-stranded RNA virus belonging to the family Coronaviridae. Due to its structural variability and mutability, this virus continues to evolve and pose a major health threat around the world. Its characteristics, such as transmissibility, antigenicity, and resistance to drugs and vaccines, are continually altered through mutations. Examining mutational hotspots and their structural repercussions can thus aid in the development of more-effective vaccinations and treatment plans. In this study, we used full genome sequences of SARS-CoV-2 variants to predict structural changes in viral proteins. These sequences were obtained from the Global Initiative on Sharing Avian Influenza Data (GISAID), and a set of significant mutations were identified in each of the non-structural proteins (NSP1-16) and structural proteins, including the envelope, nucleocapsid, membrane, and spike proteins. The mutations were characterized as stabilizing or destabilizing based on their effect on protein dynamics and stability, and their impact on structure and function was evaluated. Among all of the proteins, NSP6 stands out as especially variable. The results of this study augment our understanding of how mutational events influence virus pathogenicity and evolution.
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References
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Acknowledgement
SV thanks the University Grants Commission-Faculty Recharge Program (UGC-FRP), New Delhi, India, for financial support. The authors thank BIC at DoBT, AU (BT/PR40163/BTIS/137/31/2021), DBT, Govt. of India, for computational facilities.
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KS and SS were involved in data analysis and manuscript writing, while DK generated the mutational data. SV was involved in conceptualization, analysis, and writing of the manuscript.
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Dr. Sangita Venkataraman receives her salary from University Grants Commission-Faculty Recharge Program (UGC-FRP), New Delhi. The work was not funded by any funding agency.
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Senthilazhagan, K., Sakthimani, S., Kallanja, D. et al. SARS-CoV-2: analysis of the effects of mutations in non-structural proteins. Arch Virol 168, 186 (2023). https://doi.org/10.1007/s00705-023-05818-2
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DOI: https://doi.org/10.1007/s00705-023-05818-2