Actin-modulating protein cofilin is involved in the formation of measles virus ribonucleoprotein complex at the perinuclear region

Ritsuko Koga, Yukihiko Sugita, Takeshi Noda, Yusuke Yanagi, Shinji Ohno

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

In measles virus (MV)-infected cells, the ribonucleoprotein (RNP) complex, comprised of the viral genome and the nucleocapsid (N) protein, phosphoprotein (P protein), and large protein, assembles at the perinuclear region and synthesizes viral RNAs. The cellular proteins involved in the formation of the RNP complex are largely unknown. In this report, we show that cofilin, an actin- modulating host protein, interacts with the MV N protein and aids in the formation of the RNP complex. Knockdown of cofilin using the short hairpin RNA reduces the formation of the RNP complex after MV infection and that of the RNP complex-like structure after plasmid-mediated expression of MV N and P proteins. A lower level of formation of the RNP complex results in the reduction of viral RNA synthesis. Cofilin phosphorylation on the serine residue at position 3, an enzymatically inactive form, is increased after MV infection and the phosphorylated form of cofilin is preferentially included in the complex. These results indicate that cofilin plays an important role in MV replication by increasing formation of the RNP complex and viral RNA synthesis.

Original languageEnglish
Pages (from-to)10524-10531
Number of pages8
JournalJournal of virology
Volume89
Issue number20
DOIs
Publication statusPublished - 2015

All Science Journal Classification (ASJC) codes

  • Microbiology
  • Immunology
  • Insect Science
  • Virology

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