ORF3a of SARS-CoV-2 promotes lysosomal exocytosis-mediated viral egress.
ORF3a of SARS-CoV-2 promotes lysosomal exocytosis-mediated viral egress.
复制标题
SARS-CoV-2 的 ORF3a 促进溶酶体胞吐作用介导的病毒流出
DOI:
10.1016/j.devcel.2021.10.006
复制
发表时间:
2021-12-06
影响因子:
11.8
通讯作者:
Zhang H
中科院分区:
文献类型:
--
作者:
Chen D;Zheng Q;Sun L;Ji M;Li Y;Deng H;Zhang H
Viral entry and egress are important determinants of virus infectivity and pathogenicity. β-coronaviruses, including the COVID-19 virus SARS-CoV-2 and mouse hepatitis virus (MHV), exploit the lysosomal exocytosis pathway for egress. Here, we show that SARS-CoV-2 ORF3a, but not SARS-CoV ORF3a, promotes lysosomal exocytosis. SARS-CoV-2 ORF3a facilitates lysosomal targeting of the BORC-ARL8b complex, which mediates trafficking of lysosomes to the vicinity of the plasma membrane, and exocytosis-related SNARE proteins. The Ca2+ channel TRPML3 is required for SARS-CoV-2 ORF3a-mediated lysosomal exocytosis. Expression of SARS-CoV-2 ORF3a greatly elevates extracellular viral release in cells infected with the coronavirus MHV-A59, which itself lacks ORF3a. In SARS-CoV-2 ORF3a, Ser171 and Trp193 are critical for promoting lysosomal exocytosis and blocking autophagy. When these residues are introduced into SARS-CoV ORF3a, it acquires the ability to promote lysosomal exocytosis and inhibit autophagy. Our results reveal a mechanism by which SARS-CoV-2 interacts with host factors to promote its extracellular egress. Chen et al. demonstrate that ORF3a of SARS-CoV-2, but not SARS-CoV, promotes lysosomal exocytosis by promoting lysosomal targeting of the BORC-ARL8b complex and exocytosis-related SNARE proteins. The residues at 171 and 193 are key determinants of the differential function of SARS-CoV-2 and SARS-CoV ORF3a in lysosomal exocytosis and autophagy inhibition.
登录
查看更多内容
影响因子:
21.3
作者:
Medina DL;Di Paola S;Peluso I;Armani A;De Stefani D;Venditti R;Montefusco S;Scotto-Rosato A;Prezioso C;Forrester A;Settembre C;Wang W;Gao Q;Xu H;Sandri M;Rizzuto R;De Matteis MA;Ballabio A
通讯作者:
Ballabio A
影响因子:
64.5
作者:
Miao Y;Li G;Zhang X;Xu H;Abraham SN
通讯作者:
Abraham SN
影响因子:
4
作者:
Pu, Jing;Guardia, Carlos M.;Bonifacino, Juan S.
通讯作者:
Bonifacino, Juan S.
影响因子:
11.8
作者:
Medina, Diego L.;Fraldi, Alessandro;Bouche, Valentina;Annunziata, Fabio;Mansueto, Gelsomina;Spampanato, Carmine;Puri, Claudia;Pignata, Antonella;Martina, Jose A.;Sardiello, Marco;Palmieri, Michela;Polishchuk, Roman;Puertollano, Rosa;Ballabio, Andrea
通讯作者:
Ballabio, Andrea
影响因子:
64.5
作者:
Ghosh S;Dellibovi-Ragheb TA;Kerviel A;Pak E;Qiu Q;Fisher M;Takvorian PM;Bleck C;Hsu VW;Fehr AR;Perlman S;Achar SR;Straus MR;Whittaker GR;de Haan CAM;Kehrl J;Altan-Bonnet G;Altan-Bonnet N
通讯作者:
Altan-Bonnet N