Rabbit anti-Human PTPRN Polyclonal Antibody

Uniprot Id

Q16849

Target Species

Human

Target Name

PTPRN

Target Full Name

Receptor-type tyrosine-protein phosphatase-like N

Target Function

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). Required to maintain normal levels of renin expression and renin release. Seems to lack intrinsic enzyme activity. May regulate catalytic active protein-tyrosine phosphatases such as PTPRA through dimerization.; ICA512-TMF regulates dynamics and exocytosis of insulin secretory granules (SGs); binding of ICA512-TMF to SNTB2/beta-2-syntrophin is proposed to restrain SGs mobility and exocytosis by tethering them to the actin cytoskeleton depending on UTRN; the function is inhibited by cytoplasmic ICA512-CFF dimerizing with ICA512-TMF and displacing SNTB2.; ICA512-CCF translocated to the nucleus promotes expression of insulin and other granule-related genes; the function implicates binding to and regulating activity of STAT5B probably by preventing its dephosphorylation and potentially by inducing its sumoylation by recruiting PIAS4. Enhances pancreatic beta-cell proliferation by converging with signaling by STAT5B and STAT3. ICA512-CCF located in the cytoplasm regulates dynamics and exocytosis of insulin secretory granules (SGs) by dimerizing with ICA512-TMF and displacing SNTB2 thus enhancing SGs mobility and exocytosis.

Target Involvement

Autoantigen in insulin-dependent diabetes mellitus (IDDM).

Target Subcellular Location

Membrane; Single-pass type I membrane protein. Cytoplasmic vesicle, secretory vesicle membrane; Single-pass type I membrane protein. Perikaryon. Cell projection, axon. Cell junction, synapse. Cell membrane; Single-pass type I membrane protein. Endosome.; [ICA512-transmembrane fragment]: Cytoplasmic vesicle, secretory vesicle membrane.; [ICA512-cleaved cytosolic fragment]: Nucleus.

Target Protein Families

Protein-tyrosine phosphatase family, Receptor class 8 subfamily

Target Tissue Specificity

Expression is restricted to neuroendocrine cells. Found in pancreas, brain and pituitary.

Target Research Area

Signal Transduction

Target Synonyms

CA 512; FLJ16131; IA 2; IA 2/PTP; IA2; IA2/PTP; ICA 3; ICA 512; ICA3; ICA512; Islet cell antigen 2; Islet cell antigen 512; Islet cell autoantigen 3; Protein tyrosine phosphatase like N; Protein tyrosine phosphatase like N precursor; Protein tyrosine phosphatase receptor type N; PTP IA 2; PTP IA-2; PTP IA2; PTPIA 2; PTPN; Ptprn; PTPRN protein; PTPRN_HUMAN; R PTP N; R-PTP-N; Receptor type tyrosine protein phosphatase like N; Receptor-type tyrosine-protein phosphatase-like N; RPTPN

Target Background

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 possesses an extracellular region, a single transmembrane region, and a single catalytic domain, and thus represents a receptor-type PTP. This PTP was found to be an autoantigen that is reactive with insulin-dependent diabetes mellitus (IDDM) patient sera, and thus may be a potential target of autoimmunity in diabetes mellitus. Alternate splicing results in multiple transcript variants.