Remdesivir is a delayed translocation inhibitor of SARS-CoV-2 replication.

Remdesivir is a delayed translocation inhibitor of SARS-CoV-2 replication.
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DOI:
10.1016/j.molcel.2021.01.035
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发表时间:
2021-04-01
期刊:
影响因子:
16
通讯作者:
Johnson KA
Johnson KA
中科院分区:
生物学1区
文献类型:
--
作者:
Bravo JPK;Dangerfield TL;Taylor DW;Johnson KA

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Remdesivir是美国FDA批准用于治疗COVID-19的核苷类似物。在这里,我们提出了3.9-Å-resolution冷冻电镜重建一个瑞德西韦停止的RNA依赖的RNA聚合酶复合物,发现在活性位点完全结合了3个拷贝的单磷酸瑞德西韦(RMP)和部分结合的第四个RMP。该结构揭示了RMP在RMP后掺入3个碱基后阻断RNA易位,导致链终止延迟,可以指导合理设计改进型抗病毒药物。Bravo等人揭示了瑞德西韦诱导的SARS-CoV-2 RNA依赖性RNA聚合酶停滞的结构基础。停滞的RdRp的结构表明,链易位被纳入的瑞德西韦和聚合酶之间的空间冲突所阻断。
Remdesivir is a nucleoside analog approved by the US FDA for treatment of COVID-19. Here, we present a 3.9-Å-resolution cryo-EM reconstruction of a remdesivir-stalled RNA-dependent RNA polymerase complex, revealing full incorporation of 3 copies of remdesivir monophosphate (RMP) and a partially incorporated fourth RMP in the active site. The structure reveals that RMP blocks RNA translocation after incorporation of 3 bases following RMP, resulting in delayed chain termination, which can guide the rational design of improved antiviral drugs. Bravo et al. reveal the structural basis for remdesivir-induced stalling of the SARS-CoV-2 RNA-dependent RNA polymerase. The structure of the stalled RdRp shows that chain translocation is blocked by steric clashes between incorporated remdesivir and the polymerase.
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