T-cell receptor gamma/delta: comparison of gene configurations and function between humans and chimpanzees.
The human and chimpanzee T-cell receptor gamma-delta (TCR gamma delta) bearing cells represent a minor subset (3-8%) of T lymphocytes. In the periphery, the TCR gamma delta population has a restricted combinatorial repertoire. The TCRD-V1 and -V2 gene products are expressed in a mutually exclusive fashion, whereas, the TCRD-V2 and the TCRG-V9 encoded proteins show, in general, a coordinated expression. Restriction fragment length polymorphism analysis showed conservation of the restriction sites that identify the TCRG-V9 and TCRD-V2 rearrangements. The human TCRG-V9 locus has two alleles, TCRG-V9A1 and TCRG-V9A2 differing at codon position 31. The chimpanzee TCRG-V9 gene product differs from the products of the human TCRG-V9A1 and TCRG-V9A2 allele by two and three amino acid replacements, respectively. The human and the chimpanzee TCRG-V9-TCRD-V2 lymphocytes show a similar specific proliferative and cytolytic response to human Daudi Burkitt's lymphoma cells. Therefore, the amino acid replacements found in the chimpanzee TCRG-V9 gene product do not change the superantigen specificity across this species barrier.
Sturm
E
E
Department of Immunology, Dr. Daniel den Hoed Cancer Center, Rotterdam, The Netherlands.
Bontrop
R E
RE
Vreugdenhil
R J
RJ
Otting
N
N
Bolhuis
R L
RL
D000483:Alleles; D000595:Amino Acid Sequence; D000818:Animals; D000911:Antibodies, Monoclonal; D001483:Base Sequence; D005075:Biological Evolution; D015139:Blotting, Southern; D002051:Burkitt Lymphoma / Q000276:immunology; D016694:Gene Rearrangement, delta-Chain T-Cell Antigen Receptor; D015334:Gene Rearrangement, gamma-Chain T-Cell Antigen Receptor; D006801:Humans; D008969:Molecular Sequence Data; D002679:Pan troglodytes; D016133:Polymerase Chain Reaction; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000235:genetics*
D000911:Antibodies, Monoclonal; D016692:Receptors, Antigen, T-Cell, gamma-delta