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Monoclonal antibody against the carboxy terminal peptide of pp60src of Rous sarcoma virus reacts with native pp60src.
Author(s) -
Tamura T.,
Bauer H.
Publication year - 1982
Publication title -
the embo journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.484
H-Index - 392
eISSN - 1460-2075
pISSN - 0261-4189
DOI - 10.1002/j.1460-2075.1982.tb01343.x
Subject(s) - biology , rous sarcoma virus , monoclonal antibody , proto oncogene tyrosine protein kinase src , peptide , virology , microbiology and biotechnology , antibody , virus , biochemistry , kinase , immunology
A monoclonal mouse antibody has been prepared against a synthetic peptide corresponding to the six carboxy‐terminal amino acids (C’ peptide) of the src gene product pp60v ‐src of Rous sarcoma virus (RSV). The antibody was able to precipitate pp60v ‐src and to bind pp60v ‐src kinase activity in a competition test, indicating that this peptide can serve as an antibody‐binding site (epitope). Furthermore, the finding that three out of 28 pp60src‐specific tumor‐bearing rabbit (TBR) sera contained antibody against the C’ peptide argues for an in vivo role for the carboxy terminus of pp60src. C’ peptide‐specific IgG was purified from one TBR serum using affinity chromatography, and was shown to precipitate significant amounts of pp60src, and bind most of the pp60src kinase activity from SRA, PrA, and B77‐C strains of avian sarcoma virus (ASV), but not endogenous pp60c ‐src, a cellular homologue to the viral pp60v ‐src. Similar results were obtained with IgG isolated from a C’ peptide immune rabbit serum. None of the three C’ peptide‐specific IgGs could serve as a phosphate acceptor in an immune complex protein kinase reaction.