PMID- 15078943 OWN - NLM STAT- MEDLINE DCOM- 20040601 LR - 20190509 IS - 0022-538X (Print) IS - 1098-5514 (Electronic) IS - 0022-538X (Linking) VI - 78 IP - 9 DP - 2004 May TI - Discovery of a second form of tripartite complex containing gH-gL of human herpesvirus 6 and observations on CD46. PG - 4609-16 AB - The human herpesvirus 6 (HHV-6) glycoprotein H (gH)-glycoprotein L (gL) complex associates with glycoprotein Q (gQ) (Y. Mori, P. Akkapaiboon, X. Yang, and K. Yamanishi, J. Virol. 77:2452-2458, 2003), and the gH-gL-gQ complex interacts with human CD46 (Y. Mori, X. Yang, P. Akkapaiboon, T. Okuno, and K. Yamanishi, J. Virol. 77:4992-4999, 2003). Here, we show that the HHV-6 U47 gene, which is a positional homolog of the human cytomegalovirus glycoprotein O (gO) gene, encodes a third component of the HHV-6 gH-gL-containing envelope complex. A monoclonal antibody (MAb) against the amino terminus of HHV-6 gO reacted in immunoblots with protein species migrating at 120 to 130 kDa and 74 to 80 kDa in lysates of HHV-6-infected cells and with a 74- to 80-kDa protein species in purified virions. The 80-kDa form of gO was coimmunoprecipitated with an anti-gH MAb, but an anti-gQ MAb, which coimmunoprecipitated gH, did not coprecipitate gO. Furthermore, the gH-gL-gO complex did not bind to human CD46, indicating that the complex was not a ligand for CD46. These findings suggested that the viral envelope contains at least two kinds of tripartite complexes, gH-gL-gQ and gH-gL-gO, and that the gH-gL-gO complex may play a role different from that of gH-gL-gQ during viral infection. This is the first report of two kinds of gH-gL complexes on the viral envelope in a member of the herpesvirus family. FAU - Mori, Yasuko AU - Mori Y AD - Department of Microbiology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan. ymori@micro.med.osaka-u.ac.jp FAU - Akkapaiboon, Pilailuk AU - Akkapaiboon P FAU - Yonemoto, Sayoko AU - Yonemoto S FAU - Koike, Masato AU - Koike M FAU - Takemoto, Masaya AU - Takemoto M FAU - Sadaoka, Tomohiko AU - Sadaoka T FAU - Sasamoto, Yumi AU - Sasamoto Y FAU - Konishi, Shozo AU - Konishi S FAU - Uchiyama, Yasuo AU - Uchiyama Y FAU - Yamanishi, Koichi AU - Yamanishi K LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Virol JT - Journal of virology JID - 0113724 RN - 0 (Antigens, CD) RN - 0 (CD46 protein, human) RN - 0 (Ligands) RN - 0 (Membrane Cofactor Protein) RN - 0 (Membrane Glycoproteins) RN - 0 (Viral Envelope Proteins) RN - 0 (glycoprotein L, Human herpesvirus 1) RN - 0 (glycoprotein O, cytomegalovirus) RN - 142985-75-9 (glycoprotein H, herpesvirus 6) SB - IM MH - Amino Acid Sequence MH - Antigens, CD/*metabolism MH - Cell Line MH - Herpesvirus 6, Human/*metabolism MH - Humans MH - Ligands MH - Membrane Cofactor Protein MH - Membrane Glycoproteins/*metabolism MH - Molecular Sequence Data MH - Sequence Alignment MH - T-Lymphocytes/virology MH - Viral Envelope Proteins/chemistry/genetics/*metabolism PMC - PMC387711 EDAT- 2004/04/14 05:00 MHDA- 2004/06/02 05:00 PMCR- 2004/05/01 CRDT- 2004/04/14 05:00 PHST- 2004/04/14 05:00 [pubmed] PHST- 2004/06/02 05:00 [medline] PHST- 2004/04/14 05:00 [entrez] PHST- 2004/05/01 00:00 [pmc-release] AID - 2279 [pii] AID - 10.1128/jvi.78.9.4609-4616.2004 [doi] PST - ppublish SO - J Virol. 2004 May;78(9):4609-16. doi: 10.1128/jvi.78.9.4609-4616.2004.