Cryo-EM structures of the SARS-CoV-2 endoribonuclease Nsp15 reveal insight into nuclease specificity and dynamics.
Cryo-EM structures of the SARS-CoV-2 endoribonuclease Nsp15 reveal insight into nuclease specificity and dynamics.
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DOI:
10.1038/s41467-020-20608-z
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发表时间:
2021-01-27
影响因子:
16.6
通讯作者:
Stanley RE
中科院分区:
文献类型:
--
作者:
Pillon MC;Frazier MN;Dillard LB;Williams JG;Kocaman S;Krahn JM;Perera L;Hayne CK;Gordon J;Stewart ZD;Sobhany M;Deterding LJ;Hsu AL;Dandey VP;Borgnia MJ;Stanley RE
Nsp15, a uridine specific endoribonuclease conserved across coronaviruses, processes viral RNA to evade detection by host defense systems. Crystal structures of Nsp15 from different coronaviruses have shown a common hexameric assembly, yet how the enzyme recognizes and processes RNA remains poorly understood. Here we report a series of cryo-EM reconstructions of SARS-CoV-2 Nsp15, in both apo and UTP-bound states. The cryo-EM reconstructions, combined with biochemistry, mass spectrometry, and molecular dynamics, expose molecular details of how critical active site residues recognize uridine and facilitate catalysis of the phosphodiester bond. Mass spectrometry revealed the accumulation of cyclic phosphate cleavage products, while analysis of the apo and UTP-bound datasets revealed conformational dynamics not observed by crystal structures that are likely important to facilitate substrate recognition and regulate nuclease activity. Collectively, these findings advance understanding of how Nsp15 processes viral RNA and provide a structural framework for the development of new therapeutics. Nsp15 is a uridine specific endoribonuclease present in all coronaviruses. Here, the authors determine the cryo-EM structures of SARS-CoV-2 Nsp15 in the apo and UTP-bound states, which together with biochemical experiments, mass spectrometry and molecular dynamics simulations provide insights into the catalytic mechanism of Nsp15 and its conformational dynamics.
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影响因子:
3.7
作者:
Deng X;Baker SC
通讯作者:
Baker SC
影响因子:
6.4
作者:
Athmer J;Fehr AR;Grunewald M;Smith EC;Denison MR;Perlman S
通讯作者:
Perlman S
影响因子:
5.6
作者:
Guarino LA;Bhardwaj K;Dong W;Sun J;Holzenburg A;Kao C
通讯作者:
Kao C
影响因子:
2.9
作者:
Cuchillo, Claudi M.;Victoria Nogues, M.;Raines, Ronald T.
通讯作者:
Raines, Ronald T.
DOI:
10.1107/s0907444909052925
发表时间:
2010-02
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Adams PD;Afonine PV;Bunkóczi G;Chen VB;Davis IW;Echols N;Headd JJ;Hung LW;Kapral GJ;Grosse-Kunstleve RW;McCoy AJ;Moriarty NW;Oeffner R;Read RJ;Richardson DC;Richardson JS;Terwilliger TC;Zwart PH
通讯作者:
Zwart PH