title: Association of Epstein-Barr virus early antigen diffuse component and virus-specified DNA polymerase activity.
abstract: The role of Epstein-Barr virus (EBV) early antigen diffuse component (EA-D) and its relationship with EBV DNA polymerase in EBV genome-carrying cells are unclear, EBV-specified DNA polymerase was purified in a sequential manner from Raji cells treated with phorbol-12,13-dibutyrate and n-butyrate by phosphocellulose, DEAE-cellulose, double-stranded DNA-cellulose, and blue Sepharose column chromatography. Four polypeptides with molecular masses of 110,000, 100,000, 55,000, and 49,000 daltons were found to be associated with EBV-specified DNA polymerase activity. A monoclonal antibody which could neutralize the EBV DNA polymerase activity was prepared and found to recognize 55,000- and 49,000-dalton polypeptides. An EA-D monoclonal antibody, R3 (G. R. Pearson, V. Vorman, B. Chase, T. Sculley, M. Hummel, and E. Kieff, J. Virol. 47:183-201, 1983), was also able to recognize these same two polypeptides associated with EBV DNA polymerase activity. It was concluded that EBV EA-D polypeptides, as identified by R3 monoclonal antibody, are critical components of EBV DNA polymerase.
mesh_terms: D000911:Antibodies, Monoclonal / Q000276:immunology; D000956:Antigens, Viral / Q000032:analysis* / Q000276:immunology; D004259:DNA-Directed DNA Polymerase / Q000032:analysis* / Q000302:isolation & purification; D004854:Herpesvirus 4, Human / Q000201:enzymology*; D008970:Molecular Weight
chemical_list: D000911:Antibodies, Monoclonal; D000956:Antigens, Viral; C033305:Epstein-Barr virus early antigen; D004259:DNA-Directed DNA Polymerase