Mechanism of molnupiravir-induced SARS-CoV-2 mutagenesis.
Mechanism of molnupiravir-induced SARS-CoV-2 mutagenesis.
复制标题
摩尔班司米拉维尔诱导的SARS-COV-2诱变的机理。
DOI:
10.1038/s41594-021-00651-0
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发表时间:
2021-09
影响因子:
16.8
通讯作者:
Cramer P
中科院分区:
文献类型:
--
作者:
Kabinger F;Stiller C;Schmitzová J;Dienemann C;Kokic G;Hillen HS;Höbartner C;Cramer P
Molnupiravir is an orally available antiviral drug candidate currently in phase III trials for the treatment of patients with COVID-19. Molnupiravir increases the frequency of viral RNA mutations and impairs SARS-CoV-2 replication in animal models and in humans. Here, we establish the molecular mechanisms underlying molnupiravir-induced RNA mutagenesis by the viral RNA-dependent RNA polymerase (RdRp). Biochemical assays show that the RdRp uses the active form of molnupiravir, β-d-N4-hydroxycytidine (NHC) triphosphate, as a substrate instead of cytidine triphosphate or uridine triphosphate. When the RdRp uses the resulting RNA as a template, NHC directs incorporation of either G or A, leading to mutated RNA products. Structural analysis of RdRp–RNA complexes that contain mutagenesis products shows that NHC can form stable base pairs with either G or A in the RdRp active center, explaining how the polymerase escapes proofreading and synthesizes mutated RNA. This two-step mutagenesis mechanism probably applies to various viral polymerases and can explain the broad-spectrum antiviral activity of molnupiravir. Quantitative biochemical assays and high-resolution cryo-EM analysis reveal how the COVID-19 antiviral drug candidate molnupiravir causes lethal viral mutagenesis by the RNA-dependent RNA polymerase (RdRp) of SARS-CoV-2.
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影响因子:
16
作者:
Bravo JPK;Dangerfield TL;Taylor DW;Johnson KA
通讯作者:
Johnson KA
影响因子:
4.9
作者:
Ehteshami, Maryam;Tao, Sijia;Schinazi, Raymond F.
通讯作者:
Schinazi, Raymond F.
影响因子:
158.5
作者:
Grein, J.;Ohmagari, N.;Flanigan, T.
通讯作者:
Flanigan, T.
影响因子:
5.9
作者:
Hillen HS
通讯作者:
Hillen HS
DOI:
10.1107/s2059798318006551
发表时间:
2018-06-01
期刊:
Acta crystallographica. Section D, Structural biology
影响因子:
--
作者:
Afonine PV;Poon BK;Read RJ;Sobolev OV;Terwilliger TC;Urzhumtsev A;Adams PD
通讯作者:
Adams PD