VMP1 and TMEM41B are essential for DMV formation during β-coronavirus infection.
VMP1 and TMEM41B are essential for DMV formation during β-coronavirus infection.
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DOI:
10.1083/jcb.202112081
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发表时间:
2022-06-06
期刊:
影响因子:
--
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中科院分区:
文献类型:
--
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Ji et al. show that the autophagy proteins VMP1 and TMEM41B are required for β-coronavirus infection, and they function at different steps during DMV biogenesis. TMEM41B is involved in nsp3/4 binding and ER zippering, while VMP1 is essential for bending the paired ER into DMVs. β-coronaviruses reshape host cell endomembranes to form double-membrane vesicles (DMVs) for genome replication and transcription. Ectopically expressed viral nonstructural proteins nsp3 and nsp4 interact to zipper and bend the ER for DMV biogenesis. Genome-wide screens revealed the autophagy proteins VMP1 and TMEM41B as important host factors for SARS-CoV-2 infection. Here, we demonstrated that DMV biogenesis, induced by virus infection or expression of nsp3/4, is impaired in the VMP1 KO or TMEM41B KO cells. In VMP1 KO cells, the nsp3/4 complex forms normally, but the zippered ER fails to close into DMVs. In TMEM41B KO cells, the nsp3–nsp4 interaction is reduced and DMV formation is suppressed. Thus, VMP1 and TMEM41B function at different steps during DMV formation. VMP1 was shown to regulate cross-membrane phosphatidylserine (PS) distribution. Inhibiting PS synthesis partially rescues the DMV defects in VMP1 KO cells, suggesting that PS participates in DMV formation. We provide molecular insights into the collaboration of host factors with viral proteins to remodel host organelles.
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DOI:
10.1083/jcb.202103105
发表时间:
2021-06-07
期刊:
The Journal of cell biology
影响因子:
--
作者:
Li YE;Wang Y;Du X;Zhang T;Mak HY;Hancock SE;McEwen H;Pandzic E;Whan RM;Aw YC;Lukmantara IE;Yuan Y;Dong X;Don A;Turner N;Qi S;Yang H
通讯作者:
Yang H
影响因子:
13.6
作者:
Pomorski, Thomas Guenther;Menon, Anant K.
通讯作者:
Menon, Anant K.
影响因子:
9.8
作者:
Shoemaker, Christopher J.;Huang, Tina Q.;Denic, Vladimir
通讯作者:
Denic, Vladimir
影响因子:
64.5
作者:
Hoffmann HH;Schneider WM;Rozen-Gagnon K;Miles LA;Schuster F;Razooky B;Jacobson E;Wu X;Yi S;Rudin CM;MacDonald MR;McMullan LK;Poirier JT;Rice CM
通讯作者:
Rice CM
影响因子:
3.2
作者:
Das Sarma, J;Scheen, E;Weiss, SR
通讯作者:
Weiss, SR