Inhibition of Protein N-Glycosylation Blocks SARS-CoV-2 Infection.

Inhibition of Protein N-Glycosylation Blocks SARS-CoV-2 Infection.
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DOI:
10.1128/mbio.03718-21
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发表时间:
2021-02-22
期刊:
影响因子:
6.4
通讯作者:
Acosta-Serrano Á
Acosta-Serrano Á
中科院分区:
生物学1区
文献类型:
--
作者:
Casas-Sanchez A;Romero-Ramirez A;Hargreaves E;Ellis CC;Grajeda BI;Estevao IL;Patterson EI;Hughes GL;Almeida IC;Zech T;Acosta-Serrano Á

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严重急性呼吸综合征冠状病毒2型(SARS-CoV-2)的刺突蛋白(spike protein,SPs)被广泛地N-糖基化,而SPs蛋白是宿主细胞入侵所必需的,也是疫苗和免疫治疗的靶点。预计这些N-聚糖通过稳定其开放构象和宿主免疫逃避来调节刺突与宿主受体的结合。在这里,我们研究了宿主N-糖基化途径和SARS-CoV-2 N-聚糖对感染的重要性。使用RNA干扰或抑制剂(包括FDA批准的药物)消除宿主N-糖基化,减少了感染的传播,包括变体B.1.1.7(α),B.1.351(β),P.1(γ)和B.1.617.2(δ)。在这些条件下,细胞产生更少的病毒粒子,有些完全失去了感染性。此外,完整病毒粒子的部分酶促去糖基化表明,表面暴露的N-聚糖对细胞侵袭至关重要。总而言之,我们提出蛋白质N-糖基化是一种具有临床治疗COVID-19潜力的靶向途径。
Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) extensively N-glycosylates its spike proteins, which are necessary for host cell invasion and the target of both vaccines and immunotherapies. These N-glycans are predicted to modulate spike binding to the host receptor by stabilizing its open conformation and host immunity evasion. Here, we investigated the essentiality of both the host N-glycosylation pathway and SARS-CoV-2 N-glycans for infection. Ablation of host N-glycosylation using RNA interference or inhibitors, including FDA-approved drugs, reduced the spread of the infection, including that of variants B.1.1.7 (Alpha), B.1.351 (Beta), P.1 (Gamma) and B.1.617.2 (Delta). Under these conditions, cells produced fewer virions and some completely lost their infectivity. Furthermore, partial enzymatic deglycosylation of intact virions showed that surface-exposed N-glycans are critical for cell invasion. Altogether, we propose protein N-glycosylation as a targetable pathway with clinical potential for treatment of COVID-19.
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