The protein tyrosine phosphatase (PTP) family of proteins are signaling molecules that regulate processes such as cell growth, cell differentiation, oncogenic transformation and the mitotic cycle. PTPN21 (protein tyrosine phosphatase, non-receptor type 21), also known as PTPD1 or PTPRL10, is a 1,174 amino acid member of the PTP family and localizes to both the cytoplasm and the cytoskeleton. Containing one FERM domain and one tyrosine-protein phosphatase domain, PTPN21 functions to catalyze the water-dependent conversion of a protein tyrosine phosphate into a protein tyrosine and a free phosphate and, via this catalytic activity, may be involved in liver regeneration and spermatogenesis. The gene encoding PTPN21 maps to human chromosome 14, which houses over 700 genes and comprises nearly 3.5% of the human genome.
dJ1175B15.2 (protein tyrosine phosphatase, non-receptor type 21); Protein-tyrosine phosphatase D1; Tyrosine-protein phosphatase non-receptor type 21