The SARS-CoV-2 protein ORF3a inhibits fusion of autophagosomes with lysosomes.

The SARS-CoV-2 protein ORF3a inhibits fusion of autophagosomes with lysosomes.
复制标题

SARS-CoV-2 蛋白 ORF3a 抑制自噬体与溶酶体的融合

DOI:
10.1038/s41421-021-00268-z
复制
发表时间:
2021-05-04
期刊:
影响因子:
33.5
通讯作者:
Lu K
Lu K
中科院分区:
生物学1区
文献类型:
--
作者:
Zhang Y;Sun H;Pei R;Mao B;Zhao Z;Li H;Lin Y;Lu K

文献摘要

参考文献

被引文献

相似文献

严重急性呼吸综合征冠状病毒2(SARS-CoV-2)导致了正在进行的2019年冠状病毒疾病大流行。SARS-CoV-2如何调节宿主细胞逃逸清除的细胞反应尚不清楚。自噬是一种细胞内溶酶体降解途径,用于清除包括病毒在内的各种货物。在这里,我们系统地筛选了28种SARS-CoV-2病毒蛋白,发现ORF3a通过阻断自噬小体与溶酶体的融合而强烈抑制自噬通量。ORF3a与溶酶体共定位并与VPS39相互作用,VPS39是同型融合和蛋白质分类(HOPS)复合体的一个组成部分。ORF3a-VPS39的相互作用阻止了啤酒花与RAB7的结合,从而阻止了融合机制的组装,导致未融合自噬小体的积累。这些结果提示了SARS-CoV-2逃避降解的潜在机制,即病毒干扰自噬小体-溶酶体融合。此外,我们的发现将有助于针对自噬的策略,赋予潜在的保护措施,以防止SARS-CoV-2的传播。
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused the ongoing coronavirus disease 2019 pandemic. How SARS-CoV-2 regulates cellular responses to escape clearance by host cells is unknown. Autophagy is an intracellular lysosomal degradation pathway for the clearance of various cargoes, including viruses. Here, we systematically screened 28 viral proteins of SARS-CoV-2 and identified that ORF3a strongly inhibited autophagic flux by blocking the fusion of autophagosomes with lysosomes. ORF3a colocalized with lysosomes and interacted with VPS39, a component of the homotypic fusion and protein sorting (HOPS) complex. The ORF3a–VPS39 interaction prohibited the binding of HOPS with RAB7, which prevented the assembly of fusion machinery, leading to the accumulation of unfused autophagosomes. These results indicated the potential mechanism by which SARS-CoV-2 escapes degradation; that is, the virus interferes with autophagosome–lysosome fusion. Furthermore, our findings will facilitate strategies targeting autophagy for conferring potential protection against the spread of SARS-CoV-2.
DOI: 10.1083/jcb.201804028
发表时间: 2018-10-01
期刊: The Journal of cell biology
影响因子: --
作者:
Bas L;Papinski D;Licheva M;Torggler R;Rohringer S;Schuschnig M;Kraft C
通讯作者: Kraft C
DOI: 10.7554/elife.04135
发表时间: 2014-11-28
期刊: eLife
影响因子: 7.7
作者:
Ge L;Zhang M;Schekman R
通讯作者: Schekman R
DOI: 10.1038/s41579-018-0003-6
发表时间: 2018-06
期刊: Nature reviews. Microbiology
影响因子: --
作者:
Choi Y;Bowman JW;Jung JU
通讯作者: Jung JU
DOI: 10.1080/22221751.2020.1719902
发表时间: 2020-01-01
影响因子: 13.2
作者:
Chan, Jasper Fuk-Woo;Kok, Kin-Hang;Yuen, Kwok-Yung
通讯作者: Yuen, Kwok-Yung
DOI: 10.1038/s41586-020-2575-3
发表时间: 2020-07-22
期刊: NATURE
影响因子: 64.8
作者:
Hoffmann, Markus;Moesbauer, Kirstin;Poehlmann, Stefan
通讯作者: Poehlmann, Stefan