The flaviviral methyltransferase is a substrate of Casein Kinase 1.
The flaviviral methyltransferase is a substrate of Casein Kinase 1.
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DOI:
10.1016/j.virusres.2009.01.002
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发表时间:
2009-04
期刊:
影响因子:
5
通讯作者:
Striker, Rob
中科院分区:
文献类型:
--
作者:
Bhattacharya, Dipankar;Ansari, Israrul H.;Striker, Rob
Serine/Threonine phosphorylation of the nonstructural protein 5 (NS5) is a conserved feature of flaviviruses, but the identity and function(s) of the responsible kinase(s) remain unknown. Serine 56 in the methyltransferase domain of NS5 can be phosphorylated intracellularly, is conserved in all flaviviruses, and is a critical residue in the catalytic mechanism. A negative charge at this residue inactives the 2′-0 methyltransferase activity necessary to form a 5′ cap structure of the viral RNA. Here we show pharmacologic inhibition of Casein Kinase 1 (CK1) suppresses yellow fever virus (YFV) production. We also demonstrate the alpha isoform of Casein Kinase 1 (CK1α), a kinase previously identified as phosphorylating Hepatitis C Virus NS5A protein, also phosphorylates serine 56 of YFV methyltransferase. Overall these results suggest CK1 activity can influence flaviviral replication.
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