Human Herpesvirus 6 Open Reading Frame U12 Encodes a Functional Beta-chemokine Receptor

Overview

Journal J Virol

Publisher American Society for Microbiology

Date 1998 Jun 17

PMID 9621074

Citations 51

Authors

Y Isegawa

Z Ping

K Nakano

N Sugimoto

K Yamanishi

Affiliations

Soon will be listed here.

Abstract

Human herpesvirus 6 (HHV- 6), which belongs to the betaherpesvirus subfamily and infects mainly T cells in vitro, causes acute and latent infections. HHV- 6 contains two genes (U12 and U51) that encode putative homologs of cellular G-protein-coupled receptors (GCR), while three other betaherpesviruses, human cytomegalovirus, murine cytomegalovirus, and human herpesvirus 7, have three, one, and two GCR-homologous genes, respectively. The U12 gene is expressed late in infection from a spliced mRNA. The U12 gene was cloned, and the protein was expressed in cells and analyzed for its biological characteristics. U12 functionally encoded a calcium-mobilizing receptor for beta-chemokines such as regulated upon activation, normal T expressed and secreted (RANTES), macrophage inflammatory proteins 1alpha and 1beta (MIP-1alpha and MIP-1beta) and monocyte chemoattractant protein 1 but not for the alpha-chemokine interleukin-8, suggesting that the chemokine selectivity of the U12 product was distinct from that of the known mammalian chemokine receptors. These findings suggested that the product of U12 may play an important role in the pathogenesis of HHV- 6 through transmembrane signaling by binding with beta-chemokines.

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