Health / Medical Topics

    T-Cell Receptor Gene

    Definition 1

    The T-cell antigen receptors consist of a heterodimer of integral membrane glycoproteins. Two distinct receptors exist, alpha/beta and gamma/delta. Alpha/beta receptors are found on helper and cytotoxic T-cells and are specific for antigenic peptides presented in association with MHC gene products. Gamma/delta receptors, found in association with CD3, directly recognize proteins and non-proteinacious phospho-ligands. Alpha/beta and gamma/delta are non-covalently associated with CD3-gamma, -delta, -epsilon, and -zeta proteins, forming the TCR-CD3 complex, which activate MAPKs and JNK1 through the CD3 antigens, the adaptor protein LAT, and tyrosine kinases LCK and ZAP70. The genes for T-cell receptor subunits are encoded by distinct gene elements that are assembled by somatic rearrangement during T-cell development. Translocations and inversions of these loci are observed in human T-cell leukemias and lymphomas. (NCI Thesaurus)

    Definition 2

    DNA sequences, in cells of the T-lymphocyte lineage, that code for T-cell receptors. The TcR genes are formed by somatic rearrangement (see GENE REARRANGEMENT, T-LYMPHOCYTE and its children) of germline gene segments, and resemble Ig genes in their mechanisms of diversity generation and expression. (NLM, Medical Subject Headings)




    YOU MAY ALSO LIKE

    This region represents the germline organization of the T cell receptor gamma locus. The gamma locus includes V (variable), J (joining), and…
    T-cell receptor gamma chain alternative reading frame protein isoform 1 (58 aa, ~7 kDa) is encoded by the human TARP gene. This…
    One component of the gamma-delta T-cell receptor. Encoded by a locus on chromosome 7. Somatic recombination results in formation of the active…
    The reciprocal product of T-cell receptor (TCR) gene rearrangement. Following TCR gene rearrangement the T-cell receptor excision circle (TREC) is maintained in…
    This region represents the germline organization of the T cell receptordelta locus. The delta locus includes V (variable), J (joining), diversity (D),…
    One component of the gamma-delta T-cell receptor. Encoded by a locus on chromosome 14. Somatic recombination results in formation of the active…

    © 1991-2023 The Titi Tudorancea Bulletin | Titi Tudorancea® is a Registered Trademark | Terms of use and privacy policy
    Contact