title: An antibody to a synthetic peptide that recognises SV40 small-t antigen.
abstract: A peptide Tyr.Arg.Asp.Leu.Lys.Leu corresponding to the carboxy-terminal six amino acids of small-t antigen predicted from the DNA sequence of SV40 was synthesised, coupled to bovine serum albumin and to ovalbumin and used to raise antibody in rabbits. The sera obtained immunoprecipitated [125I]peptide. It also recognised SV40 small-t that was synthesised in vitro from SV40 mRNA or extracted from SV40 infected monkey cells. The immunoprecipitation of small-t was inhibited by added peptide. To demonstrate that the determinant was present at the carboxy-terminal end of the molecule, truncated versions of small-t coded for by 0.54-0.59 deletion mutants were tested. dl 890 small-t, which contains an in-phase deletion removing nine amino acids but leaving the carboxy-terminal sequences intact, was recognised by the antipeptide serum. By contrast dl 885 small-t, which has an out-of-phase deletion leading to an altered carboxy terminus coded in an alternative reading frame, was not recognised. The data confirm the location and specificity of the determinant recognised on small-t by the antipeptide serum.
mesh_terms: D000818:Animals; D000952:Antigens, Polyomavirus Transforming; D002460:Cell Line; D002522:Chlorocebus aethiops; D002872:Chromosome Deletion; D007668:Kidney; D009154:Mutation; D009842:Oligopeptides / Q000138:chemical synthesis* / Q000276:immunology; D014176:Protein Biosynthesis; D012333:RNA, Messenger / Q000235:genetics; D013539:Simian virus 40 / Q000235:genetics / Q000276:immunology*; D014764:Viral Proteins / Q000235:genetics / Q000276:immunology*
chemical_list: D000952:Antigens, Polyomavirus Transforming; D009842:Oligopeptides; D012333:RNA, Messenger; D014764:Viral Proteins