期刊
CRITICAL REVIEWS IN MICROBIOLOGY
卷 39, 期 2, 页码 166-179出版社
TAYLOR & FRANCIS LTD
DOI: 10.3109/1040841X.2012.694412
关键词
Virus entry; dynamin; membrane fission; membrane fusion
类别
资金
- National Basic Research Program of China (973 Program) [2010CB530102, 2011CB504703]
- National Natural Science Foundation of China (NSFC) [81021003]
Dynamin, a large guanosine triphosphatase (GTPase), has been implicated in virus entry, but its mechanisms of action are controversial. The entry procedure of most enveloped viruses involves endocytosis and membrane fusion. Dynamin has been suggested to act both as a regulatory GTPase by controlling the early stages of clathrin-mediated endocytosis (CME), which is an important endocytic pathway utilized by many viruses, and as a mechanchemical enzyme that induces membrane fission and pinches endocytic vesicles off from the cellular plasma membrane in later stages in several endocytic pathways, including CME. In addition to its involvement in virus endocytosis, dynamin has also been proposed to participate in membrane fusion between the virus and endosomes following endocytosis. Crystal structures and cryo-electron micrography (cryo-EM) have elucidated the structure of dynamin, which led to development of a mechanochemical model of how dynamin-mediated membrane fission occurs. Based on this, we propose a hypothetical model that explains how dynamin facilitates virus membrane fusion and discuss its roles in virus entry.
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