Cell Reports (May 2015)

Lineage-Specific Viral Hijacking of Non-canonical E3 Ubiquitin Ligase Cofactors in the Evolution of Vif Anti-APOBEC3 Activity

  • Joshua R. Kane,
  • David J. Stanley,
  • Judd F. Hultquist,
  • Jeffrey R. Johnson,
  • Nicole Mietrach,
  • Jennifer M. Binning,
  • Stefán R. Jónsson,
  • Sarah Barelier,
  • Billy W. Newton,
  • Tasha L. Johnson,
  • Kathleen E. Franks-Skiba,
  • Ming Li,
  • William L. Brown,
  • Hörður I. Gunnarsson,
  • Adalbjorg Adalbjornsdóttir,
  • James S. Fraser,
  • Reuben S. Harris,
  • Valgerður Andrésdóttir,
  • John D. Gross,
  • Nevan J. Krogan

DOI
https://doi.org/10.1016/j.celrep.2015.04.038
Journal volume & issue
Vol. 11, no. 8
pp. 1236 – 1250

Abstract

Read online

HIV-1 encodes the accessory protein Vif, which hijacks a host Cullin-RING ubiquitin ligase (CRL) complex as well as the non-canonical cofactor CBFβ, to antagonize APOBEC3 antiviral proteins. Non-canonical cofactor recruitment to CRL complexes by viral factors, to date, has only been attributed to HIV-1 Vif. To further study this phenomenon, we employed a comparative approach combining proteomic, biochemical, structural, and virological techniques to investigate Vif complexes across the lentivirus genus, including primate (HIV-1 and simian immunodeficiency virus macaque [SIVmac]) and non-primate (FIV, BIV, and MVV) viruses. We find that CBFβ is completely dispensable for the activity of non-primate lentiviral Vif proteins. Furthermore, we find that BIV Vif requires no cofactor and that MVV Vif requires a novel cofactor, cyclophilin A (CYPA), for stable CRL complex formation and anti-APOBEC3 activity. We propose modular conservation of Vif complexes allows for potential exaptation of functions through the acquisition of non-CRL-associated host cofactors while preserving anti-APOBEC3 activity.