Proteomic analysis of virus-host interactions in an infectious context using recombinant viruses

Mol Cell Proteomics. 2011 Dec;10(12):M110.007443. doi: 10.1074/mcp.M110.007443. Epub 2011 Sep 12.

Abstract

RNA viruses exhibit small-sized genomes encoding few proteins, but still establish complex networks of interactions with host cell components to achieve replication and spreading. Ideally, these virus-host protein interactions should be mapped directly in infected cell culture, but such a high standard is often difficult to reach when using conventional approaches. We thus developed a new strategy based on recombinant viruses expressing tagged viral proteins to capture both direct and indirect physical binding partners during infection. As a proof of concept, we engineered a recombinant measles virus (MV) expressing one of its virulence factors, the MV-V protein, with a One-STrEP amino-terminal tag. This allowed virus-host protein complex analysis directly from infected cells by combining modified tandem affinity chromatography and mass spectrometry analysis. Using this approach, we established a prosperous list of 245 cellular proteins interacting either directly or indirectly with MV-V, and including four of the nine already known partners of this viral factor. These interactions were highly specific of MV-V because they were not recovered when the nucleoprotein MV-N, instead of MV-V, was tagged. Besides key components of the antiviral response, cellular proteins from mitochondria, ribosomes, endoplasmic reticulum, protein phosphatase 2A, and histone deacetylase complex were identified for the first time as prominent targets of MV-V and the critical role of the later protein family in MV replication was addressed. Most interestingly, MV-V showed some preferential attachment to essential proteins in the human interactome network, as assessed by centrality and interconnectivity measures. Furthermore, the list of MV-V interactors also showed a massive enrichment for well-known targets of other viruses. Altogether, this clearly supports our approach based on reverse genetics of viruses combined with high-throughput proteomics to probe the interaction network that viruses establish in infected cells.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Chlorocebus aethiops
  • DEAD-box RNA Helicases / isolation & purification
  • DEAD-box RNA Helicases / metabolism
  • HEK293 Cells
  • Histone Deacetylases / metabolism
  • Host-Pathogen Interactions*
  • Humans
  • Interferon-Induced Helicase, IFIH1
  • Measles / metabolism
  • Measles / virology*
  • Measles virus / genetics
  • Measles virus / physiology*
  • Multiprotein Complexes / isolation & purification
  • Multiprotein Complexes / metabolism
  • Organisms, Genetically Modified
  • Protein Binding
  • Protein Interaction Mapping / methods
  • Protein Interaction Maps
  • Recombinant Proteins / genetics
  • Recombinant Proteins / isolation & purification
  • Recombinant Proteins / metabolism
  • Reverse Genetics
  • STAT1 Transcription Factor / isolation & purification
  • STAT1 Transcription Factor / metabolism
  • STAT2 Transcription Factor / isolation & purification
  • STAT2 Transcription Factor / metabolism
  • Sensitivity and Specificity
  • Tandem Mass Spectrometry
  • Vero Cells
  • Virulence Factors / genetics
  • Virulence Factors / isolation & purification
  • Virulence Factors / metabolism
  • Virus Replication

Substances

  • Multiprotein Complexes
  • Recombinant Proteins
  • STAT1 Transcription Factor
  • STAT1 protein, human
  • STAT2 Transcription Factor
  • STAT2 protein, human
  • Virulence Factors
  • Histone Deacetylases
  • IFIH1 protein, human
  • DEAD-box RNA Helicases
  • Interferon-Induced Helicase, IFIH1