PMID- 15140992 OWN - NLM STAT- MEDLINE DCOM- 20040610 LR - 20240322 IS - 0022-538X (Print) IS - 1098-5514 (Electronic) IS - 0022-538X (Linking) VI - 78 IP - 11 DP - 2004 Jun TI - Mutational analyses of Epstein-Barr virus glycoprotein 42 reveal functional domains not involved in receptor binding but required for membrane fusion. PG - 5946-56 AB - Epstein-Barr virus (EBV) is a human gammaherpesvirus associated with malignancies of both epithelial and lymphoid origin. Efficient infection of the latent host reservoir B lymphocytes involves the binding of glycoproteins gp350/220 for initial attachment, followed by the concerted action of gH, gL, gB, and gp42 for membrane fusion. The type II membrane protein gp42 is required for infection of B cells and assembles into a complex with gH and gL. The cellular host receptor for gp42, class II human leukocyte antigen (HLA), has been structurally verified by crystallization analyses of gp42 bound to HLA-DR1. Interestingly, the crystal structure revealed a hydrophobic pocket consisting of many aromatic and aliphatic residues from the predicted C-type lectin domain of gp42 that in other members of the C-type lectin family binds major histocompatibility complex class I or other diverse ligands. Although the hydrophobic pocket does not bind HLA class II, mutational analyses presented here indicate that this domain is essential for EBV-induced membrane fusion. In addition, mutational analysis of the region of gp42 contacting HLA class II in the gp42-HLA-DR1 cocrystal confirms that this region interacts with HLA class II and that this interaction is also important for EBV-induced membrane fusion. FAU - Silva, Amanda L AU - Silva AL AD - Department of Microbiology and Immunology, Northwestern University Medical School, Ward 6-231, Chicago, IL 60611, USA. FAU - Omerovic, Jasmina AU - Omerovic J FAU - Jardetzky, Theodore S AU - Jardetzky TS FAU - Longnecker, Richard AU - Longnecker R LA - eng GR - GM61050/GM/NIGMS NIH HHS/United States GR - R01 CA093444/CA/NCI NIH HHS/United States GR - R01 AI038972/AI/NIAID NIH HHS/United States GR - R01 GM061050/GM/NIGMS NIH HHS/United States GR - T32 GM08061/GM/NIGMS NIH HHS/United States GR - R56 AI038972/AI/NIAID NIH HHS/United States GR - T32 GM008061/GM/NIGMS NIH HHS/United States GR - R01 CA062234/CA/NCI NIH HHS/United States GR - R01 DE013127/DE/NIDCR NIH HHS/United States GR - CA62234/CA/NCI NIH HHS/United States GR - CA93444/CA/NCI NIH HHS/United States GR - R01 CA073507/CA/NCI NIH HHS/United States GR - CA73507/CA/NCI NIH HHS/United States GR - AI38972/AI/NIAID NIH HHS/United States GR - DE13127/DE/NIDCR NIH HHS/United States GR - R37 AI038972/AI/NIAID NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Virol JT - Journal of virology JID - 0113724 RN - 0 (Glycoproteins) RN - 0 (Histocompatibility Antigens Class II) RN - 0 (Receptors, Virus) RN - 0 (Viral Proteins) SB - IM MH - Amino Acid Sequence MH - Animals MH - Binding Sites MH - CHO Cells MH - Cricetinae MH - Glycoproteins/*chemistry/physiology MH - Histocompatibility Antigens Class II/analysis/metabolism MH - *Membrane Fusion MH - Molecular Sequence Data MH - Receptors, Virus/*physiology MH - Viral Proteins/*chemistry/physiology PMC - PMC415818 EDAT- 2004/05/14 05:00 MHDA- 2004/06/21 10:00 PMCR- 2004/06/01 CRDT- 2004/05/14 05:00 PHST- 2004/05/14 05:00 [pubmed] PHST- 2004/06/21 10:00 [medline] PHST- 2004/05/14 05:00 [entrez] PHST- 2004/06/01 00:00 [pmc-release] AID - 78/11/5946 [pii] AID - 2284-03 [pii] AID - 10.1128/JVI.78.11.5946-5956.2004 [doi] PST - ppublish SO - J Virol. 2004 Jun;78(11):5946-56. doi: 10.1128/JVI.78.11.5946-5956.2004.