Biopolym. Cell. 1987; 3(2):59-65.
Structure and Function of Biopolymers
Localization of antigenic determinants of beef tryptophanyl-tRNA synthetase revealed by monoclonal antibodies
- Institute of Molecular Biology, Academy of Sciences of the USSR
Moscow, USSR
Abstract
The method of limited cleavage of tryptophanyl-tRNA synthetase with trypsin and BrCN as well as radioimmunoassay and radioimmunoblotting are used to show that the antigenic determinant for monoclonal antibodies Ami is located within the 5 kDa fragment and for the Am3 – within the 9 kDa fragment, the both are located at the N-termini of the polypeptide chains; the antigenic determinant for Am2 residues is within the 24 kDa fragment located in the middle of tryptophanyl-tRNA synthetase polypeptide chain. BrCN-fragment maintaining the Ami antigenic determinant is purified by HPLC; it contains 22–25 amino acid residues. Tryptic fragments and fragments obtained by cleavage only at arginine residues are immunologically inactive against Ami, Am2 and Am3.
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