TMEM41B是一種泛黃病毒宿主因子
作者:
小柯機器人發布時間:2020/12/10 16:30:06
美國洛克菲勒大學Charles M. Rice、紐約大學John T. Poirier等研究人員合作發現,TMEM41B是一種泛黃病毒宿主因子。相關論文於2020年12月8日在線發表在《細胞》雜誌上。
為了鑑定黃病毒感染所需的宿主因子,研究人員進行了全基因組功能喪失的CRISPR-Cas9篩選。基於這些結果,研究人員主要確定了TMEM41B和VMP1在病毒複製周期中所起的作用。研究人員對TMEM41B的機理研究表明,所測試的黃病毒科所有成員都需要TMEM41B。研究人員測試了另外12個病毒家族,發現冠狀病毒科的SARS-CoV-2也需要TMEM41B進行感染。
值得注意的是,東亞人口中近20%的單核苷酸多態性(SNP)減少了黃病毒感染。根據這些機理研究,研究人員認為TMEM41B會被募集到黃病毒RNA複製複合物中來促進膜彎曲,從而為病毒基因組複製創造一個受保護的環境。
據介紹,黃病毒對人類健康構成持續威脅。這些RNA病毒通過蚊子和蜱蟲叮咬傳播,並經常引起疾病暴發。
附:英文原文
Title: TMEM41B IS A PAN-FLAVIVIRUS HOST FACTOR
Author: H.-Heinrich Hoffmann, William M. Schneider, Kathryn Rozen-Gagnon, Linde A. Miles, Felix Schuster, Brandon Razooky, Eliana Jacobson, Xianfang Wu, Soon Yi, Charles M. Rudin, Margaret R. MacDonald, Laura K. McMullan, John T. Poirier, Charles M. Rice
Issue&Volume: 2020-12-08
Abstract: Flaviviruses pose a constant threat to human health. These RNA viruses are transmitted by the bite of infected mosquitoes and ticks and regularly cause outbreaks. To identify host factors required for flavivirus infection we performed full-genome loss of function CRISPR-Cas9 screens. Based on these results we focused our efforts on characterizing the roles that TMEM41B and VMP1 play in the virus replication cycle. Our mechanistic studies on TMEM41B revealed that all members of the Flaviviridae family that we tested require TMEM41B. We tested 12 additional virus families and found that SARS-CoV-2 of the Coronaviridae also required TMEM41B for infection. Remarkably, single nucleotide polymorphisms (SNPs) present at nearly twenty percent in East Asian populations reduce flavivirus infection. Based on our mechanistic studies we propose that TMEM41B is recruited to flavivirus RNA replication complexes to facilitate membrane curvature, which creates a protected environment for viral genome replication.
DOI: 10.1016/j.cell.2020.12.005
Source: https://www.cell.com/cell/fulltext/S0092-8674(20)31627-5
Cell:《細胞》,創刊於1974年。隸屬於細胞出版社,最新IF:36.216