Characterization of SARS2 Nsp15 nuclease activity reveals it's mad about U.
Characterization of SARS2 Nsp15 nuclease activity reveals it's mad about U.
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DOI:
10.1093/nar/gkab719
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发表时间:
2021-09-27
影响因子:
14.9
通讯作者:
Stanley RE
中科院分区:
文献类型:
--
作者:
Frazier MN;Dillard LB;Krahn JM;Perera L;Williams JG;Wilson IM;Stewart ZD;Pillon MC;Deterding LJ;Borgnia MJ;Stanley RE
Nsp15 is a uridine specific endoribonuclease that coronaviruses employ to cleave viral RNA and evade host immune defense systems. Previous structures of Nsp15 from across Coronaviridae revealed that Nsp15 assembles into a homo-hexamer and has a conserved active site similar to RNase A. Beyond a preference for cleaving RNA 3′ of uridines, it is unknown if Nsp15 has any additional substrate preferences. Here, we used cryo-EM to capture structures of Nsp15 bound to RNA in pre- and post-cleavage states. The structures along with molecular dynamics and biochemical assays revealed critical residues involved in substrate specificity, nuclease activity, and oligomerization. Moreover, we determined how the sequence of the RNA substrate dictates cleavage and found that outside of polyU tracts, Nsp15 has a strong preference for purines 3′ of the cleaved uridine. This work advances our understanding of how Nsp15 recognizes and processes viral RNA, and will aid in the development of new anti-viral therapeutics.
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DOI:
10.1042/bcj20210199
发表时间:
2021-07-16
期刊:
The Biochemical journal
影响因子:
--
作者:
Canal B;Fujisawa R;McClure AW;Deegan TD;Wu M;Ulferts R;Weissmann F;Drury LS;Bertolin AP;Zeng J;Beale R;Howell M;Labib K;Diffley JFX
通讯作者:
Diffley JFX
影响因子:
6.7
作者:
Gao B;Gong X;Fang S;Weng W;Wang H;Chu H;Sun Y;Meng C;Tan L;Song C;Qiu X;Liu W;Forlenza M;Ding C;Liao Y
通讯作者:
Liao Y
DOI:
10.1016/j.bbrc.2020.11.015
发表时间:
2021-01-29
影响因子:
3.1
作者:
Gulyaeva AA;Gorbalenya AE
通讯作者:
Gorbalenya AE
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