title: Type-common CP-1 antigen of herpes simplex virus is associated with a 59,000-molecular-weight envelope glycoprotein.
abstract: The CP-1 antigen of herpes simplex virus type 1 (HSV-1) is a glycoprotein found in the soluble portion of infected cells, in detergent extracts of infected cell membranes, and in the envelope of purified virus. Antisera were prepared against a further purified form of CP-1 prepared from HSV soluble antigen mix; a glycoprotein, gp52, isolated from detergent-treated infected cells; and detergent extracts of purified virus. Each of the antisera reacted with CP-1 to give a single immunoprecipitin band of identity, and each antiserum neutralized the infectivity of HSV-1 and HSV-2. Our results suggested that the type-common determinants involved in the stimulation of neutralizing antibody resided on a 52,000-molecular-weight (52K) glycoprotein. The envelope of HSV contains several glycoproteins: one component at 59K and a complex of two or three components at 130K, none of which corresponds in molecular weight to gp52. Using the antisera as immunological probes, we performed pulse-chase experiments with [(35)S]methionine-labeled HSV-1-infected cells and followed the disposition of the glycoproteins during the infectious cycle. Each antiserum immunoprecipitated a (35)S-labeled 52K protein from lysates of cells pulse-labeled at 5 h after infection. By 10 h, the label was chased into a 59K protein also precipitable by each of the three antisera. The results suggest that gp52 is a precursor of gp59 and that the latter corresponds in molecular weight to one of the major glycoproteins of the virion envelope.
mesh_terms: D000956:Antigens, Viral / Q000032:analysis*; D003902:Detergents; D000939:Epitopes; D006023:Glycoproteins / Q000032:analysis*; D018139:Simplexvirus / Q000032:analysis / Q000276:immunology*; D014764:Viral Proteins / Q000032:analysis*; D014771:Virion / Q000032:analysis
chemical_list: D000956:Antigens, Viral; D003902:Detergents; D000939:Epitopes; D006023:Glycoproteins; D014764:Viral Proteins