期刊
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
卷 23, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/ijms23052677
关键词
procapsid; nucleocapsid; polymerase complex; assembly; replication; packaging
This review discusses the progress in the study of Cystoviridae, focusing on the structure and dynamic changes of proteins during RNA packaging and replication mechanisms. These studies are important for understanding the viral assembly process.
The bacteriophage family Cystoviridae consists of a single genus, Cystovirus, that is lipid-containing with three double-stranded RNA (ds-RNA) genome segments. With regard to the segmented dsRNA genome, they resemble the family Reoviridae. Therefore, the Cystoviruses have long served as a simple model for reovirus assembly. This review focuses on important developments in the study of the RNA packaging and replication mechanisms, emphasizing the structural conformations and dynamic changes during maturation of the five proteins required for viral RNA synthesis, P1, P2, P4, P7, and P8. Together these proteins constitute the procapsid/polymerase complex (PC) and nucleocapsid (NC) of the Cystoviruses. During viral assembly and RNA packaging, the five proteins must function in a coordinated fashion as the PC and NC undergo expansion with significant position translation. The review emphasizes this facet of the viral assembly process and speculates on areas suggestive of additional research efforts.
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