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Comparative Study
. 2013 Jun 20;441(1):75-84.
doi: 10.1016/j.virol.2013.03.008. Epub 2013 Apr 4.

Characterization of the guinea pig CMV gH/gL/GP129/GP131/GP133 complex in infection and spread

Marcy Auerbach  1 , Donghong Yan, Ashley Fouts, Min Xu, Alberto Estevez, Cary D Austin, Fernando Bazan, Becket Feierbach
Affiliations
Free article
Comparative Study

Characterization of the guinea pig CMV gH/gL/GP129/GP131/GP133 complex in infection and spread

Marcy Auerbach et al. Virology. .
Free article

Abstract

In human cytomegalovirus (HCMV), the UL128-131A locus plays an essential role in cellular tropism and spread. Here, we report the complete annotation of the GP129-133 locus from guinea pig cytomegalovirus (GPCMV) and the discovery of the UL131A homolog, named GP133. We have found that similar to HCMV the GP129-133 proteins form a pentamer complex with the GPCMV glycoproteins gH and gL. In addition, we find that the GP129-133 proteins play a critical role in entry as the GP129-133 deletion mutant shows a defect in both endothelial and fibroblast cell entry. Although the GP129-133 deletion strain can propagate in vitro, we find that the deletion fails to spread in vivo. Interestingly, the wildtype strain can spontaneously give rise to the GP129-133 deletion strain during in vivo spread, suggesting genetic instability at this locus.

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