title: Monoclonal antibodies specific to transforming polyproteins encoded by independent isolates of feline sarcoma virus.
abstract: Hybridomas secreting monoclonal antibodies directed against polyprotein gene products of the Gardner, Snyder-Theilen, and McDonough strain of feline sarcoma virus have been isolated. Antibody produced by one hybridoma recognizes immunological determinants localized within a feline leukemia virus gag gene structural component (p15) common to polyproteins encoded by each feline sarcoma virus isolate while antibody produced by a second is specific for p30 determinants unique to P170gag-fms. Additional hybridomas secrete antibody directed against v-fes specific determinants common to the Gardner and Snyder-Theilen feline sarcoma virus-encoded polyproteins and to v-fms determinants unique to P170gas-fms polyprotein. GA P110gas-fes and ST P85gas-fes immunoprecipitated by antibody directed against p15 exhibit readily detectable levels of protein kinase activity but lack such activity when precipitated by antibody specific for their acquired sequence (v-fes) components. P170gas-fms immunoprecipitated by monoclonal antibody to either p15 or p30 lacks detectable levels of autophosphorylation but represents a substrate for the GA P110gag-fes and ST P85gag-fes enzymatic activities. These findings argue that the v-fes-associated protein kinase represents an intrinsic property of the v-fes gene product and recognizes tyrosine acceptor sites within polyprotein gene products of all three strains of feline sarcoma virus.
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000302:isolation & purification*; D000914:Antibodies, Viral / Q000302:isolation & purification*; D001202:Ascitic Fluid / Q000276:immunology; D006825:Hybridomas / Q000276:immunology; D005256:Leukemia Virus, Feline / Q000276:immunology; D019000:Phosphotyrosine; D011494:Protein Kinases / Q000378:metabolism; D051381:Rats; D011916:Rats, Inbred F344; D012190:Retroviridae / Q000276:immunology*; D005253:Sarcoma Viruses, Feline / Q000276:immunology*; D014443:Tyrosine / Q000031:analogs & derivatives / Q000032:analysis; D014764:Viral Proteins / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D000914:Antibodies, Viral; D014764:Viral Proteins; D019000:Phosphotyrosine; D014443:Tyrosine; D011494:Protein Kinases