Protein Tyrosine Phosphatase Receptor Type U (PTPRU)

Receptor-type tyrosine-protein phosphatase U is a member of the protein tyrosine phosphatase (PTP) family. This PTP possesses an extracellular region, a single transmembrane region, and two tandem intracellular catalytic domains, and thus represents a receptor-type PTP. The extracellular region contains a meprin-A5 antigen-PTP (MAM) domain, Ig-like and fibronectin type III-like repeats. This PTP was thought to play roles in cell-cell recognition and adhesion. Studies of the similar gene in mice suggested the role of this PTP in early neural development. The expression of this gene was reported to be regulated by phorbol myristate acetate (PMA) or calcium ionophore in Jurkat T lymphoma cells. Three alternatively spliced transcript variants, which encode distinct proteins, have been reported.