title: Structurally divergent human T cell receptor gamma proteins encoded by distinct C gamma genes.
abstract: The human T cell receptor (TCR) gamma polypeptide occurs in structurally distinct forms on certain peripheral blood T lymphocytes. Complementary DNA clones representing the transcripts of functionally rearranged TCR gamma genes in these cells have been analyzed. The expression of a disulfide-linked and a nondisulfide-linked form of TCR gamma correlates with the use of the C gamma 1 and C gamma 2 constant-region gene segments, respectively. Variability in TCR gamma polypeptide size and disulfide linkage is determined by the number of copies and the sequence of a repeated segment of the constant region. Thus C gamma 1 and C gamma 2 are used to generate structurally distinct, yet functional, T3-associated receptor complexes on peripheral blood lymphocytes. Tryptic peptide mapping suggests that the T3-associated TCR gamma and delta peptides in the nondisulfide-linked form are distinct.
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D005091:Exons; D005796:Genes; D006801:Humans; D010446:Peptide Fragments / Q000235:genetics*; D011948:Receptors, Antigen, T-Cell / Q000235:genetics*; D016692:Receptors, Antigen, T-Cell, gamma-delta; D012091:Repetitive Sequences, Nucleic Acid; D013601:T-Lymphocytes / Q000502:physiology*
chemical_list: D010446:Peptide Fragments; D011948:Receptors, Antigen, T-Cell; D016692:Receptors, Antigen, T-Cell, gamma-delta