Molecular cloning of a novel protein-tyrosine phosphatase SH-PTP3 with sequence similarity to the src-homology region 2.
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Adachi M, Sekiya M, Miyachi T, Matsuno K, Hinoda Y, Imai K, Yachi A
Molecular cloning of a novel protein-tyrosine phosphatase SH-PTP3 with sequence similarity to the src-homology region 2.
FEBS Lett. 1992 Dec 21;314(3):335-9.
- PubMed ID
- 1281790 [ View in PubMed]
- Abstract
Protein-tyrosine phosphorylation and dephosphorylation are directly associated with cellular growth, signal transduction, and neoplastic transformation. Here we report the isolation of a complementary DNA (cDNA) clone encoding a novel protein-tyrosine phosphatase (PTP) from a human T cell PEER cDNA library. The predicted open reading frame encodes a approximately 68-kDa protein composed of 593 amino acids which contains two src-homology region 2's (SH2 domains) at the N terminus; this PTP is designated as SH-PTP3. Northern blot analysis revealed that SH-PTP3 mRNA was expressed throughout many tissues and the transcriptional size was consistent at about 6.0 kb. As with other SH2 domains in src-family kinases, the SH2 domains of SH-PTP3 may play a crucial role in interactions with tyrosine phosphorylated signaling proteins, including itself and protein tyrosine kinases (PTKs), to regulate targets' enzyme activity.