PTPRD
Receptor-type tyrosine-protein phosphatase delta is an enzyme that, in humans, is encoded by the "PTPRD" gene. Function. The protein encoded by this gene is a member of the protein tyrosine phosphatase (PTP) family. PTPs are known to be signaling molecules that regulate a variety of cellular processes including cell growth, differentiation, mitotic cycle, and oncogenic transformation. This PTP contains an extracellular region, a single transmembrane segment and two tandem intracytoplasmic catalytic domains, thus represents a receptor-type PTP. The extracellular region of this protein is composed of three Ig-like and eight fibronectin type III-like domains . Studies of the similar genes in chick and fly suggest the role of this PTP is in promoting neurite growth, and regulating neurons axon guidance. Multiple tissue specific alternatively spliced transcript variants of this gene have been reported. Clinical significance. Mutations in the "PTPRD" gene are associated with autism, obsessive–compulsive disorder, and breast cancer. Interactions. PTPRD has been shown to interact with PTPRS and liprin-alpha-1.