FEATURES

FAMILY

DESCRIPTION

Also known as PTPR2_HUMAN, PTPRN2, KIAA0387. Plays a role in vesicle-mediated secretory processes. Required for normal accumulation of secretory vesicles in hippocampus, pituitary and pancreatic islets. Required for the accumulation of normal levels of insulin-containing vesicles and preventing their degradation. Plays a role in insulin secretion in response to glucose stimuli. Required for normal accumulation of the neurotransmitters norepinephrine, dopamine and serotonin in the brain. In females, but not in males, required for normal accumulation and secretion of pituitary hormones, such as luteinizing hormone (LH) and follicle-stimulating hormone (FSH) (By similarity). Required to maintain normal levels of renin expression and renin release (By similarity). May regulate catalytic active protein-tyrosine phosphatases such as PTPRA through dimerization (By similarity). Has phosphatidylinositol phosphatase activity; the PIPase activity is involved in its ability to regulate insulin secretion. Can dephosphorylate phosphatidylinositol 4, 5-biphosphate (PI(4, 5)P2), phosphatidylinositol 5-phosphate and phosphatidylinositol 3-phosphate (By similarity). Regulates PI(4, 5)P2 level in the plasma membrane and localization of cofilin at the plasma membrane and thus is indirectly involved in regulation of actin dynamics related to cell migration and metastasis; upon hydrolyzation of PI(4, 5)P2 cofilin is released from the plasma membrane and acts in the cytoplasm in severing F-actin filaments (PubMed:26620550). Self-associates. Interacts (via cytoplasmic domain) with PTPRN (via cytoplasmic domain). Interacts (precursor form) with CPE. Interacts with HAP1. Interacts with AP2A1 or AP2A2 and AP1G1; indicative for an association with adaptor protein complex 2 (AP-2) and adaptor protein complex 1 (AP-1) (By similarity). Interacts with AP2M1; indicative for an association with adaptor protein complex 2 (AP-2). Interacts with MYO5A (By similarity).

EXTERNAL LINKS

PTPRN2

Receptor-type tyrosine-protein phosphatase N2

PTPRN2

Molecular Synopsis