SARS-CoV-2 nucleocapsid protein binds host mRNAs and attenuates stress granules to impair host stress response.

SARS-CoV-2 nucleocapsid protein binds host mRNAs and attenuates stress granules to impair host stress response.
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DOI:
10.1016/j.isci.2021.103562
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发表时间:
2022-01-21
期刊:
影响因子:
5.8
通讯作者:
Greenblatt JF
Greenblatt JF
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Nabeel-Shah S;Lee H;Ahmed N;Burke GL;Farhangmehr S;Ashraf K;Pu S;Braunschweig U;Zhong G;Wei H;Tang H;Yang J;Marcon E;Blencowe BJ;Zhang Z;Greenblatt JF

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Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) nucleocapsid (N) protein is essential for viral replication, making it a promising target for antiviral drug and vaccine development. SARS-CoV-2 infected patients exhibit an uncoordinated immune response; however, the underlying mechanistic details of this imbalance remain obscure. Here, starting from a functional proteomics workflow, we cataloged the protein–protein interactions of SARS-CoV-2 proteins, including an evolutionarily conserved specific interaction of N with the stress granule resident proteins G3BP1 and G3BP2. N localizes to stress granules and sequesters G3BPs away from their typical interaction partners, thus attenuating stress granule formation. We found that N binds directly to host mRNAs in cells, with a preference for 3′ UTRs, and modulates target mRNA stability. We show that the N protein rewires the G3BP1 mRNA-binding profile and suppresses the physiological stress response of host cells, which may explain the imbalanced immune response observed in SARS-CoV-2 infected patients. AP-MS identifies 753 viral-host protein–protein interactions for 27 SARS-CoV-2 proteins SARS-CoV-2 N protein sequesters G3BP1/2 and attenuates stress granule formation N binds directly to mRNAs, rewires G3BP1 mRNA targets, and modulates mRNA stability SARS-CoV-2 N dampens host stress response via altering posttranscriptional programs Molecular biology; Virology; Cell biology; Proteomics;
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