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  • Title: HD-PTP: A novel protein tyrosine phosphatase gene on human chromosome 3p21.3.
    Author: Toyooka S, Ouchida M, Jitsumori Y, Tsukuda K, Sakai A, Nakamura A, Shimizu N, Shimizu K.
    Journal: Biochem Biophys Res Commun; 2000 Nov 30; 278(3):671-8. PubMed ID: 11095967.
    Abstract:
    A human cDNA encoding a novel protein tyrosine phosphatase has been isolated. The phosphatase has unique features in its domain structure: a "Zn-hand" domain containing several SH3-binding motifs, a tyrosine phosphatase domain, a C-terminal PEST motif, and an N-terminal domain similar to yeast BRO1, an apoptosis-related mammalian AIP1 and to a RHO-binding protein, Rhophilin. The gene is located at chromosome 3p21.3, an area frequently deleted in many types of cancer, especially within the functionally defined narrow region. The gene may be a human homolog of the rat PTP-TD14 gene reported by others, which can suppress H-ras-mediated transformation. We identified a hemizygous missense mutation in a lung cancer cell line. Thus, the phosphatase gene may be a candidate for one of the tumor suppressor genes located on 3p21.3.
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