Genetic and functional analysis of R5X4 human immunodeficiency virus type 1 envelope glycoproteins derived from two individuals homozygous for the CCR5Δ32 allele

Lachlan Gray, Melissa J. Churchill, Niamh Keane, Jasminka Sterjovski, Anne M. Ellett, Damian F.J. Purcell, Pantelis Poumbourios, Chenda Kol, Bin Wang, Nitin K. Saksena, Steven L. Wesselingh, Patricia Price, Martyn French, Dana Gabuzda, Paul R. Gorry

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45 Citations (Scopus)


We characterized human immunodeficiency virus type 1 (HIV-1) envelope glycoproteins (Env) isolated from two HIV-1-infected CCR5Δ32 homozygotes. Envs from both subjects used CCR5 and CXCR4 for entry into transfected cells. Most R5X4 Envs were lymphocyte-tropic and used CXCR4 exclusively for entry into peripheral blood mononuclear cells (PBMC), but a subset was dually lymphocyte- and macrophage-tropic and used either CCR5 or CXCR4 for entry into PBMC and monocyte-derived macrophages. The persistence of CCR5- using HIV-1 in two CCR5Δ32 homozygotes suggests the conserved CCR5 binding domain of Env is highly stable and provides new mechanistic insights important for HIV-1 transmission and persistence.

Original languageEnglish
Pages (from-to)3684-3691
Number of pages8
JournalJournal of Virology
Issue number7
Publication statusPublished or Issued - Apr 2006
Externally publishedYes

ASJC Scopus subject areas

  • Microbiology
  • Immunology
  • Insect Science
  • Virology

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