Human cytomegalovirus glycoprotein complex gH/gL/gO uses PDGFR-α as a key for entry

Language
en
Document Type
Article
Issue Date
2017-05-23
Issue Year
2017
Authors
Wu, Yiquan
Prager, Adrian
Boos, Simone
Resch, Moritz
Brizic, Ilija
Mach, Michael
Wildner, Sabrina
Scrivano, Laura
Adler, Barbara
Editor
Abstract

Herpesvirus gH/gL envelope glycoprotein complexes are key players in virus entry as ligands for host cell receptors and by promoting fusion of viral envelopes with cellular membranes. Human cytomegalovirus (HCMV) has two alternative gH/gL complexes, gH/gL/gO and gH/gL/UL128,130,131A which both shape the HCMV tropism. By studying binding of HCMV particles to fibroblasts, we could for the first time show that virion gH/gL/gO binds to platelet-derived growth factor-α (PDGFR-α) on the surface of fibroblasts and that gH/gL/gO either directly or indirectly recruits gB to this complex. PDGFR-α functions as an entry receptor for HCMV expressing gH/gL/gO, but not for HCMV mutants lacking the gH/gL/gO complex. PDGFR-α-dependent entry is not dependent on activation of PDGFR-α. We could also show that the gH/gL/gO—PDGFR-α interaction starts the predominant entry pathway for infection of fibroblasts with free virus. Cell-associated virus spread is either driven by gH/gL/gO interacting with PDGFR-α or by the gH/gL/UL128,130,131A complex. PDGFR-α-positive cells may thus be preferred first target cells for infections with free virus which might have implications for the design of future HCMV vaccines or anti-HCMV drugs.

Journal Title
PLoS Pathogens
Volume
13
Issue
4
Citation
PLoS Pathogens 13.4 (2017). <https://doi.org/10.1371/journal.ppat.1006281>
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