Effects of human SAMHD1 polymorphisms on HIV-1 susceptibility

Tommy E. White, Alberto Brandariz-Nuñez, Jose Carlos Valle-Casuso, Caitlin Knowlton, Baek Kim, Sara L. Sawyer, Felipe Diaz-Griffero

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

SAMHD1 is a human restriction factor that prevents efficient infection of macrophages, dendritic cells and resting CD4+ T cells by HIV-1. Here we explored the antiviral activity and biochemical properties of human SAMHD1 polymorphisms. Our studies focused on human SAMHD1 polymorphisms that were previously identified as evolving under positive selection for rapid amino acid replacement during primate speciation. The different human SAMHD1 polymorphisms were tested for their ability to block HIV-1, HIV-2 and equine infectious anemia virus (EIAV). All studied SAMHD1 variants block HIV-1, HIV-2 and EIAV infection when compared to wild type. We found that these variants did not lose their ability to oligomerize or to bind RNA. Furthermore, all tested variants were susceptible to degradation by Vpx, and localized to the nuclear compartment. We tested the ability of human SAMHD1 polymorphisms to decrease the dNTP cellular levels. In agreement, none of the different SAMHD1 variants lost their ability to reduce cellular levels of dNTPs. Finally, we found that none of the tested human SAMHD1 polymorphisms affected the ability of the protein to block LINE-1 retrotransposition.

Original languageEnglish (US)
Pages (from-to)34-44
Number of pages11
JournalVirology
Volume460-461
Issue number1
DOIs
StatePublished - 2014

Fingerprint

HIV-1
Equine infectious anemia virus
HIV-2
Virus Diseases
Dendritic Cells
Primates
Antiviral Agents
Macrophages
RNA
T-Lymphocytes
Amino Acids
Infection
Proteins

Keywords

  • DNTPs
  • HIV-1
  • LINE-1
  • SAMHD1
  • SNPs
  • Vpx

ASJC Scopus subject areas

  • Virology

Cite this

White, T. E., Brandariz-Nuñez, A., Valle-Casuso, J. C., Knowlton, C., Kim, B., Sawyer, S. L., & Diaz-Griffero, F. (2014). Effects of human SAMHD1 polymorphisms on HIV-1 susceptibility. Virology, 460-461(1), 34-44. https://doi.org/10.1016/j.virol.2014.04.023

Effects of human SAMHD1 polymorphisms on HIV-1 susceptibility. / White, Tommy E.; Brandariz-Nuñez, Alberto; Valle-Casuso, Jose Carlos; Knowlton, Caitlin; Kim, Baek; Sawyer, Sara L.; Diaz-Griffero, Felipe.

In: Virology, Vol. 460-461, No. 1, 2014, p. 34-44.

Research output: Contribution to journalArticle

White, TE, Brandariz-Nuñez, A, Valle-Casuso, JC, Knowlton, C, Kim, B, Sawyer, SL & Diaz-Griffero, F 2014, 'Effects of human SAMHD1 polymorphisms on HIV-1 susceptibility', Virology, vol. 460-461, no. 1, pp. 34-44. https://doi.org/10.1016/j.virol.2014.04.023
White TE, Brandariz-Nuñez A, Valle-Casuso JC, Knowlton C, Kim B, Sawyer SL et al. Effects of human SAMHD1 polymorphisms on HIV-1 susceptibility. Virology. 2014;460-461(1):34-44. https://doi.org/10.1016/j.virol.2014.04.023
White, Tommy E. ; Brandariz-Nuñez, Alberto ; Valle-Casuso, Jose Carlos ; Knowlton, Caitlin ; Kim, Baek ; Sawyer, Sara L. ; Diaz-Griffero, Felipe. / Effects of human SAMHD1 polymorphisms on HIV-1 susceptibility. In: Virology. 2014 ; Vol. 460-461, No. 1. pp. 34-44.
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