The Interface between Methyltransferase and Polymerase of NS5 Is Essential for Flavivirus Replication

Xiao Dan Li, Chao Shan, Cheng Lin Deng, Han Qing Ye, Pei Yong Shi, Zhi Ming Yuan, Peng Gong, Bo Zhang

Research output: Contribution to journalArticle

24 Scopus citations


The flavivirus NS5 harbors both a methyltransferase (MTase) and an RNA-dependent RNA polymerase (RdRP). Both enzyme activities of NS5 are critical for viral replication. Recently, the full-length NS5 crystal structure of Japanese encephalitis virus reveals a conserved MTase-RdRP interface that features two conserved components: a six-residue hydrophobic network and a GTR sequence. Here we showed for the first time that these key interface components are essential for flavivirus replication by various reverse genetics approaches. Interestingly, some replication-impaired variants generated a common compensatory NS5 mutation outside the interface (L322F), providing novel routes to further explore the crosstalk between MTase and RdRP.

Original languageEnglish (US)
Article numbere2891
JournalPLoS neglected tropical diseases
Issue number5
StatePublished - May 2014


ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • Infectious Diseases

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