title: Correlation between Epstein-Barr virus membrane antigen and three large cell surface glycoproteins.
abstract: A correlation between Epstein-Barr virus membrane antigen (MA) and three surface glycoproteins has been established on the basis of radio-immunoprecipitation and immunoabsorption experiments. For radio-immunoprecipitation, Epstein-Barr virus-infected cells were radiolabeled either with neuraminidase-galactose oxidase tritiated borohydride, a procedure highly specific for surface glycoproteins, or with a general tritiated amino acid mixture. Intact cells were incubated with MA(-) or MA(+) human sera, washed free of unbound immunoglobulins, and then lysed with Nonidet P-40. The antigen-antibody complexes were bound to protein A-Sepharose and after elution with sodium dodecyl sulfate were analyzed by acrylamide gel electrophoresis in sodium dodecyl sulfate. MA(+) sera specifically precipitated three glycoproteins with molecular weights of 236,000, 212,000, and 141,000 from B95-8 cells induced with 12-O-tetradecanoylphorbal-13-acetate (TPA) and from Raji cells superinfected with P3HR-1 virus. These glycoproteins were not detected on Epstein-Barr virus-negative Ramos cells treated with TPA or on B95-8 cells treated simultaneously with TPA and phosphonoacetic acid. Soybean lectin-Sepharose bound all three glycoproteins, and lectin-Sepharose-bound glycoproteins from TPA-induced P95-8 cells absorbed MA-specific antibody from MA(+) human sera. The data strongly suggest that either all three glycoproteins have MA determinants or they are part of a complex in which one or more of the components constitute the reactive antigen.
mesh_terms: D000818:Animals; D000954:Antigens, Surface / Q000032:analysis*; D000956:Antigens, Viral / Q000032:analysis*; D001402:B-Lymphocytes; D002460:Cell Line; D000939:Epitopes; D006023:Glycoproteins / Q000276:immunology*; D004854:Herpesvirus 4, Human / Q000254:growth & development / Q000276:immunology*; D008565:Membrane Proteins / Q000276:immunology*
chemical_list: D000954:Antigens, Surface; D000956:Antigens, Viral; D000939:Epitopes; D006023:Glycoproteins; D008565:Membrane Proteins