SARS-CoV-2破壞剪接、翻譯和蛋白質運輸以抑制宿主防禦
作者:
小柯機器人發布時間:2020/10/11 21:44:03
美國加州理工學院Mitchell Guttman、佛蒙特大學Devdoot Majumdar等研究人員合作發現,SARS-CoV-2破壞剪接、翻譯和蛋白質運輸以抑制宿主防禦。相關論文於2020年10月8日在線發表於國際學術期刊《細胞》。
研究人員全面定義了SARS-CoV-2蛋白與人類RNA之間的相互作用。NSP16與U1和U2剪接RNA的mRNA識別域結合,並起抑制SARS-CoV-2感染後整體剪接mRNA的作用。NSP1在核糖體的mRNA進入通道中與18S核糖體RNA結合,並在感染後導致mRNA翻譯的整體抑制。
最後,NSP8和NSP9與信號識別顆粒中的7SL RNA結合,並在感染後幹擾蛋白質向細胞膜的運輸。這些基本細胞功能中每一個的破壞都起著抑制幹擾素對病毒感染的反應的作用。這些結果揭示了SARS-CoV-2利用多管齊下的策略來拮抗必需的細胞過程,從而抑制宿主防禦。
據悉,SARS-CoV-2是最近發現的一種冠狀病毒,可引起呼吸道疾病,稱為COVID-19。儘管有迫切需求,但人們仍不完全了解SARS-CoV-2發病機理的分子基礎。
附:英文原文
Title: SARS-CoV-2 disrupts splicing, translation, and protein trafficking to suppress host defenses
Author: Abhik K. Banerjee, Mario R. Blanco, Emily A. Bruce, Drew D. Honson, Linlin M. Chen, Amy Chow, Prashant Bhat, Noah Ollikainen, Sofia A. Quinodoz, Colin Loney, Jasmine Thai, Zachary D. Miller, Aaron E. Lin, Madaline M. Schmidt, Douglas G. Stewart, Daniel Goldfarb, Giuditta De Lorenzo, Suzannah J. Rihn, Rebecca Voorhees, Jason W. Botten, Devdoot Majumdar, Mitchell Guttman
Issue&Volume: 2020-10-08
Abstract: SARS-CoV-2 is a recently identified coronavirus that causes the respiratory disease known as COVID-19. Despite the urgent need, we still do not fully understand the molecular basis of SARS-CoV-2 pathogenesis. Here, we comprehensively define the interactions between SARS-CoV-2 proteins and human RNAs. NSP16 binds to the mRNA recognition domains of the U1 and U2 splicing RNAs and acts to suppress global mRNA splicing upon SARS-CoV-2 infection. NSP1 binds to 18S ribosomal RNA in the mRNA entry channel of the ribosome and leads to global inhibition of mRNA translation upon infection. Finally, NSP8 and NSP9 bind to the 7SL RNA in the Signal Recognition Particle and interfere with protein trafficking to the cell membrane upon infection. Disruption of each of these essential cellular functions acts to suppress the interferon response to viral infection. Our results uncover a multipronged strategy utilized by SARS-CoV-2 to antagonize essential cellular processes to suppress host defenses.
DOI: 10.1016/j.cell.2020.10.004
Source: https://www.cell.com/cell/fulltext/S0092-8674(20)31310-6
Cell:《細胞》,創刊於1974年。隸屬於細胞出版社,最新IF:36.216