title: Partial amino acid sequence of monoclonal extracellular antigen-specific T cell proteins.
abstract: Antigen-specific molecules secreted by murine T cell hybrids (TABM) specific for 4-hydroxy 3-nitrophenyl (NP) or azobenzenearsonate (ABA) were purified from ascitic fluid by ion exchange chromatography and/or affinity for antigen. Partial amino acid sequence of reduced Mr 72,000 NP-specific polypeptides and Mr 20,000 peptides prepared by treatment of the ABA-specific immunoprotein with cyanogen bromide was obtained and a septapeptide of the NP-specific TABM shared 3/7 residues with the ABA-specific TABM. Both TABM shared residues present in 95% T cell receptor for antigen (TCR) V alpha subgroup I and 83-96% murine immunoglobulin V kappa Fr3. These results provide evidence that extracellular antigen-specific T cell proteins are soluble analogues of TCR alpha chains and belong to the immunoglobulin supergene family.
authors.affiliation: Department of Pathology, University of Connecticut Health Center, Farmington 06030-3105.
authors.forename: R E
authors.initials: RE
authors.lastname: Cone
authors.forename: J J
authors.initials: JJ
authors.lastname: Marchalonis
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000941:Antigens / Q000276:immunology*; D001798:Blood Proteins / Q000737:chemistry* / Q000276:immunology; D002352:Carrier Proteins / Q000097:blood* / Q000737:chemistry; D004591:Electrophoresis, Polyacrylamide Gel; D004797:Enzyme-Linked Immunosorbent Assay; D006241:Haptens / Q000276:immunology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008815:Mice, Inbred Strains; D008969:Molecular Sequence Data; D009596:Nitrophenols / Q000276:immunology; D011485:Protein Binding; D013601:T-Lymphocytes / Q000276:immunology*; D010132:p-Azobenzenearsonate / Q000276:immunology
chemical_list: D000941:Antigens; D001798:Blood Proteins; D002352:Carrier Proteins; D006241:Haptens; D009596:Nitrophenols; D010132:p-Azobenzenearsonate