Global post-translational modification profiling of HIV-1-infected cells reveals mechanisms of host cellular pathway remodeling

Cell Rep. 2022 Apr 12;39(2):110690. doi: 10.1016/j.celrep.2022.110690.

Abstract

Viruses must effectively remodel host cellular pathways to replicate and evade immune defenses, and they must do so with limited genomic coding capacity. Targeting post-translational modification (PTM) pathways provides a mechanism by which viruses can broadly and rapidly transform a hostile host environment into a hospitable one. We use mass spectrometry-based proteomics to quantify changes in protein abundance and two PTM types-phosphorylation and ubiquitination-in response to HIV-1 infection with viruses harboring targeted deletions of a subset of HIV-1 genes. PTM analysis reveals a requirement for Aurora kinase activity in HIV-1 infection and identified putative substrates of a phosphatase that is degraded during infection. Finally, we demonstrate that the HIV-1 Vpr protein inhibits histone H1 ubiquitination, leading to defects in DNA repair.

Keywords: CP: Microbiology; CP: Molecular biology; HIV-1; b56; histone h1; phosphorylation; pp2a; proteomics; systems biology; ubiquitination; vif; vpr.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • HIV Infections*
  • HIV Seropositivity*
  • HIV-1* / genetics
  • Humans
  • Protein Processing, Post-Translational
  • Proteomics
  • Ubiquitination