8BZN

SARS-CoV-2 non-structural protein 10 (nsp10) variant T102I

8BZN の概要

• エントリーDOI: 10.2210/pdb8bzn/pdb
• 分子名称: Replicase polyprotein 1ab, ZINC ION, CHLORIDE ION, ... (5 entities in total)
• 機能のキーワード: stimulator of nsp14 and nsp16, viral protein
• 由来する生物種: Severe acute respiratory syndrome coronavirus 2
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 13611.60

構造登録者

Wang, H.,Rizvi, S.R.A.,Dong, D.,Lou, J.,Wang, Q.,Sopipong, W.,Najar, F.,Agarwal, P.K.,Kozielski, F.,Haider, S. (登録日: 2022-12-15, 公開日: 2023-12-27, 最終更新日: 2024-01-10)

主引用文献

Wang, H.,Rizvi, S.R.A.,Dong, D.,Lou, J.,Wang, Q.,Sopipong, W.,Su, Y.,Najar, F.,Agarwal, P.K.,Kozielski, F.,Haider, S.
Emerging variants of SARS-CoV-2 NSP10 highlight strong functional conservation of its binding to two non-structural proteins, NSP14 and NSP16.
Elife, 12:-, 2023

PubMed Abstract: The coronavirus SARS-CoV-2 protects its RNA from being recognized by host immune responses by methylation of its 5' end, also known as capping. This process is carried out by two enzymes, non-structural protein 16 (NSP16) containing 2'-O-methyltransferase and NSP14 through its N7 methyltransferase activity, which are essential for the replication of the viral genome as well as evading the host's innate immunity. NSP10 acts as a crucial cofactor and stimulator of NSP14 and NSP16. To further understand the role of NSP10, we carried out a comprehensive analysis of >13 million globally collected whole-genome sequences (WGS) of SARS-CoV-2 obtained from the Global Initiative Sharing All Influenza Data (GISAID) and compared it with the reference genome Wuhan/WIV04/2019 to identify all currently known variants in NSP10. T12I, T102I, and A104V in NSP10 have been identified as the three most frequent variants and characterized using X-ray crystallography, biophysical assays, and enhanced sampling simulations. In contrast to other proteins such as spike and NSP6, NSP10 is significantly less prone to mutation due to its crucial role in replication. The functional effects of the variants were examined for their impact on the binding affinity and stability of both NSP14-NSP10 and NSP16-NSP10 complexes. These results highlight the limited changes induced by variant evolution in NSP10 and reflect on the critical roles NSP10 plays during the SARS-CoV-2 life cycle. These results also indicate that there is limited capacity for the virus to overcome inhibitors targeting NSP10 via the generation of variants in inhibitor binding pockets.

PubMed: 38127066
DOI: 10.7554/eLife.87884

実験手法

X-RAY DIFFRACTION (2.19 Å)