cDNA cloning of a rat orthologue of SH2D2A encoding T-cell-specific adaptor protein (TSAd): expression in T and NK cells.
The T-cell-specific adapter protein (TSAd), encoded by the SH2D2A gene, has been implicated in modulation of proximal signaling events as well as in transcriptional regulation in human T cells. We have isolated its rat homologue ( rSH2D2A) from an NK cell cDNA library and mapped the corresponding gene to chromosome 2 with a hamster-rat radiation hybrid cell panel. rSH2D2A encodes a 376 amino acid protein (rTSAd) which shows greater homology to mouse than human TSAd. In rats, rTSAd was specifically expressed by NK cells and T cells but not by other leukocytes tested. Similarly, in humans we observed abundant transcripts for TSAd in NK cells and T cells. The data suggest that TSAd may have a regulatory role in cellular activation of T and NK cells.
Department of Anatomy, Institute of Basic Medical Sciences, University of Oslo, Blindern, P.O. Box 1105, 0317, Oslo, Norway.
Shirin
S
Nejad
Yenan
Y
Bryceson
Erik
E
Dissen
Vibeke
V
Sundvold-Gjerstad
Christian
C
Naper
Bent
B
Rolstad
Anne
A
Spurkland
John Torgils
JT
Vaage
D048868:Adaptor Proteins, Signal Transducing; D000595:Amino Acid Sequence; D000818:Animals; D002352:Carrier Proteins / Q000235:genetics*; D003001:Cloning, Molecular; D047908:Intracellular Signaling Peptides and Proteins; D007694:Killer Cells, Natural / Q000378:metabolism*; D008969:Molecular Sequence Data; D051381:Rats; D017422:Sequence Analysis, DNA; D013601:T-Lymphocytes / Q000378:metabolism*
D048868:Adaptor Proteins, Signal Transducing; D002352:Carrier Proteins; D047908:Intracellular Signaling Peptides and Proteins; C405691:SH2D2A protein, human; C492466:SH2D2A protein, rat