Conserved motifs in the flavivirus NS3 RNA helicase enzyme.
Conserved motifs in the flavivirus NS3 RNA helicase enzyme.
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DOI:
10.1002/wrna.1688
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发表时间:
2022-03
期刊:
影响因子:
--
通讯作者:
Geiss BJ
中科院分区:
文献类型:
--
作者:
Du Pont KE;McCullagh M;Geiss BJ
Flaviviruses are a major health concern because over half of the world population is at risk of infection and there are very few antiviral therapeutics to treat diseases resulting from infection. Replication is an essential part of the flavivirus survival. One of the viral proteins, NS3 helicase, is critical for unwinding the double stranded RNA intermediate during flaviviral replication. The helicase performs the unwinding of the viral RNA intermediate structure in an ATP-dependent manner. NS3 helicase is a member of the Viral/DEAH-like subfamily of the superfamily 2 helicase containing eight highly conserved structural motifs (I, Ia, II, III, IV, IVa, V, and VI) localized between the ATP- and RNA-binding pockets. Of these structural motifs only three are well characterize for function in flaviviruses (I, II, and VI). The roles of the other structural motifs are not well understood for NS3 helicase function, but comparison of NS3 with other superfamily 2 helicases within the Viral/DEAH-like, DEAH/RHA, DEAD-box subfamilies can be used to elucidate the roles of these structural motifs in the flavivirus NS3 helicase. This review aims to summarize the role of each conserved structural motif within flavivirus NS3 in RNA helicase function. Superfamily 2 helicases contain highly conserved structural motifs that are essential for various helicase functions.
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