Human cytomegalovirus-encoded G protein-coupled receptor US28 mediates smooth muscle cell migration through Gα12

Ryan M. Melnychuk, Daniel Streblow, Patricia P. Smith, Alec Hirsch, Dora Pancheva, Jay Nelson

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

Coupling of G proteins to ligand-engaged chemokine receptors is the paramount event in G-protein-coupled receptor signal transduction. Previously, we have demonstrated that the human cytomegalovirus-encoded chemokine receptor US28 mediates human vascular smooth muscle cell (SMC) migration in response to either RANTES or monocyte chemoattractant protein 1. In this report, we identify the G proteins that couple with US28 to promote vascular SMC migration and identify other signaling molecules that play critical roles in this process. US28-mediated cellular migration was enhanced with the expression of the G-protein subunits Gα12 and Gα13, suggesting that US28 may functionally couple to these G proteins. In correlation with this observation, US28 was able to activate RhoA, a downstream effector of Gα12 and Gα13 in cell types with these G proteins but not in those without them and activation of RhoA was dependent on US28 stimulation with RANTES. In addition, inactivation of RhoA or the RhoA-associated kinase p160ROCK with a dominant-negative mutant of RhoA or the small molecule inhibitor Y27632, respectively, abrogated US28-induced SMC migration. The data presented here suggest that US28 functionally signals through Gα12 family G proteins and RhoA in a ligand-dependent manner and these signaling molecules are important for the ability of US28 to induce cellular migration.

Original languageEnglish (US)
Pages (from-to)8382-8391
Number of pages10
JournalJournal of Virology
Volume78
Issue number15
DOIs
StatePublished - Aug 2004

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Human herpesvirus 5
G-Protein-Coupled Receptors
Cytomegalovirus
G-proteins
GTP-Binding Proteins
cell movement
smooth muscle
myocytes
Smooth Muscle Myocytes
Cell Movement
G12-G13 GTP-Binding Protein alpha Subunits
Chemokine CCL5
Chemokine Receptors
Vascular Smooth Muscle
blood vessels
Ligands
rho-Associated Kinases
Chemokine CCL2
protein subunits
Signal Transduction

ASJC Scopus subject areas

  • Immunology

Cite this

Human cytomegalovirus-encoded G protein-coupled receptor US28 mediates smooth muscle cell migration through Gα12. / Melnychuk, Ryan M.; Streblow, Daniel; Smith, Patricia P.; Hirsch, Alec; Pancheva, Dora; Nelson, Jay.

In: Journal of Virology, Vol. 78, No. 15, 08.2004, p. 8382-8391.

Research output: Contribution to journalArticle

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