The feline homologue of CD134 is the primary binding receptor for feline immunodeficiency virus (FIV), targeting the virus preferentially to activated CD4(+) helper T cells. However, strains of FIV differ in utilization of CD134; the prototypic strain PPR requires a minimal determinant in the first cysteine-rich domain (CRD1) of feline CD134 to confer near-optimal receptor function, while strains such as GL8 require additional determinants in the CD134 CRD2. We map this determinant to a loop in CRD2 governing the interaction between the receptor and its ligand; the amino acid substitutions S78N-S79Y-K80E restored full viral receptor activity to the CDR2 of human CD134 in the context of feline CD134, with tyrosine-79 appearing to be the critical residue for restoration of receptor function.
|Autori:||Willett BJ; McMonagle EL; Bonci F; Pistello M; Hosie MJ|
|Titolo:||Mapping the domains of CD134 as a functional receptor for feline immunodeficiency virus|
|Anno del prodotto:||2006|
|Digital Object Identifier (DOI):||10.1128/JVI.00722-06|
|Appare nelle tipologie:||1.1 Articolo in rivista|