VPg

VPg (viral protein genome-linked) is a protein that is covalently attached to the 5′ end of positive strand viral RNA and acts as a primer during RNA synthesis in a variety of virus families including Picornaviridae and Caliciviridae. The primer activity of VPg occurs when the protein becomes uridylylated, providing a free hydroxyl that can be extended by the virally encoded RNA-dependent RNA polymerase. Aside from functioning as a primer, VPg also has a role in translation initiation by acting like a 5' mRNA cap.

单词	VPg
释义	VPg 英语百科 VPg VPg (viral protein genome-linked) is a protein that is covalently attached to the 5′ end of positive strand viral RNA and acts as a primer during RNA synthesis in a variety of virus families including Picornaviridae and Caliciviridae. The primer activity of VPg occurs when the protein becomes uridylylated, providing a free hydroxyl that can be extended by the virally encoded RNA-dependent RNA polymerase. Aside from functioning as a primer, VPg also has a role in translation initiation by acting like a 5' mRNA cap.
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