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-Structure paper
タイトル | A mechanism for SARS-CoV-2 RNA capping and its inhibition by nucleotide analog inhibitors. |
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ジャーナル・号・ページ | Cell, Vol. 185, Issue 23, Page 4347-4360.e17, Year 2022 |
掲載日 | 2022年11月10日 |
著者 | Liming Yan / Yucen Huang / Ji Ge / Zhenyu Liu / Pengchi Lu / Bo Huang / Shan Gao / Junbo Wang / Liping Tan / Sihan Ye / Fengxi Yu / Weiqi Lan / Shiya Xu / Feng Zhou / Lei Shi / Luke W Guddat / Yan Gao / Zihe Rao / Zhiyong Lou / |
PubMed 要旨 | Decoration of cap on viral RNA plays essential roles in SARS-CoV-2 proliferation. Here, we report a mechanism for SARS-CoV-2 RNA capping and document structural details at atomic resolution. The ...Decoration of cap on viral RNA plays essential roles in SARS-CoV-2 proliferation. Here, we report a mechanism for SARS-CoV-2 RNA capping and document structural details at atomic resolution. The NiRAN domain in polymerase catalyzes the covalent link of RNA 5' end to the first residue of nsp9 (termed as RNAylation), thus being an intermediate to form cap core (GpppA) with GTP catalyzed again by NiRAN. We also reveal that triphosphorylated nucleotide analog inhibitors can be bonded to nsp9 and fit into a previously unknown "Nuc-pocket" in NiRAN, thus inhibiting nsp9 RNAylation and formation of GpppA. S-loop (residues 50-KTN-52) in NiRAN presents a remarkable conformational shift observed in RTC bound with sofosbuvir monophosphate, reasoning an "induce-and-lock" mechanism to design inhibitors. These findings not only improve the understanding of SARS-CoV-2 RNA capping and the mode of action of NAIs but also provide a strategy to design antiviral drugs. |
リンク | Cell / PubMed:36335936 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.64 - 3.8 Å |
構造データ | EMDB-34302, PDB-8gw1: EMDB-34308: A mechanism for SARS-CoV-2 RNA capping and its inhibition by nucleotide analogue inhibitors EMDB-34310: A mechanism for SARS-CoV-2 RNA capping and its inhibition by nucleotide analogue inhibitors EMDB-34311, PDB-8gwf: EMDB-34312, PDB-8gwg: EMDB-34313, PDB-8gwi: EMDB-34314, PDB-8gwk: EMDB-34316, PDB-8gwm: EMDB-34317: A mechanism for SARS-CoV-2 RNA capping and its inhibition by nucleotide analogue inhibitors EMDB-34318, PDB-8gwo: |
化合物 | ChemComp-ZN: ChemComp-MN: ChemComp-U5P: ChemComp-HOH: ChemComp-GNP: ChemComp-MG: ChemComp-GTP: ChemComp-F86: ChemComp-6GS: |
由来 |
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キーワード | VIRAL PROTEIN / SARS-CoV-2 / capping / nucleotide analogue inhibitor / cryo-EM / VIRAL PROTEIN/INHIBITOR / VIRAL PROTEIN-INHIBITOR complex |