Antagonistic effects of cellular poly(C) binding proteins on vesicular stomatitis virus gene expression

Phat X. Dinh, Lalit K. Beura, Debasis Panda, Anshuman Das, Asit K Pattnaik

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Immunoprecipitation and subsequent mass spectrometry analysis of the cellular proteins from cells expressing the vesicular stomatitis virus (VSV) P protein identified the poly(C) binding protein 2 (PCBP2) as one of the P protein-interacting proteins. To investigate the role of PCBP2 in the viral life cycle, we examined the effects of depletion or overexpression of this protein on VSV growth. Small interfering RNA-mediated silencing of PCBP2 promoted VSV replication. Conversely, overexpression of PCBP2 in transfected cells suppressed VSV growth. Further studies revealed that PCBP2 negatively regulates overall viral mRNA accumulation and subsequent genome replication. Coimmunoprecipitation and immunofluorescence microscopic studies showed that PCBP2 interacts and colocalizes with VSV P protein in virus-infected cells. The P-PCBP2 interaction did not result in reduced levels of protein complex formation with the viral N and L proteins, nor did it induce degradation of the P protein. In addition, PCBP1, another member of the poly(C) binding protein family with homology to PCBP2, was also found to interact with the P protein and inhibit the viral mRNA synthesis at the level of primary transcription without affecting secondary transcription or genome replication. The inhibitory effects of PCBP1 on VSV replication were less pronounced than those of PCBP2. Overall, the results presented here suggest that cellular PCBP2 and PCBP1 antagonize VSV growth by affecting viral gene expression and highlight the importance of these two cellular proteins in restricting virus infections.

Original languageEnglish (US)
Pages (from-to)9459-9471
Number of pages13
JournalJournal of virology
Volume85
Issue number18
DOIs
StatePublished - Sep 1 2011

Fingerprint

Poly C
Vesiculovirus
Vesicular Stomatitis
binding proteins
Carrier Proteins
Viruses
Gene Expression
gene expression
proteins
Proteins
Virus Replication
virus replication
Growth
transcription (genetics)
Genome
Nucleocapsid Proteins
viruses
Messenger RNA
genome
Viral Genes

ASJC Scopus subject areas

  • Microbiology
  • Immunology
  • Insect Science
  • Virology

Cite this

Antagonistic effects of cellular poly(C) binding proteins on vesicular stomatitis virus gene expression. / Dinh, Phat X.; Beura, Lalit K.; Panda, Debasis; Das, Anshuman; Pattnaik, Asit K.

In: Journal of virology, Vol. 85, No. 18, 01.09.2011, p. 9459-9471.

Research output: Contribution to journalArticle

Dinh, Phat X. ; Beura, Lalit K. ; Panda, Debasis ; Das, Anshuman ; Pattnaik, Asit K. / Antagonistic effects of cellular poly(C) binding proteins on vesicular stomatitis virus gene expression. In: Journal of virology. 2011 ; Vol. 85, No. 18. pp. 9459-9471.
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