Protein Tyrosine Phosphatase Receptor Type J (PTPRJ) Antibody – Rabbit Polyclonal

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 containing five fibronectin type III repeats, a single transmembrane region, and a single intracytoplasmic catalytic domain, and thus represents a receptor-type PTP. This protein is present in all hematopoietic lineages, and was shown to negatively regulate T cell receptor signaling possibly through interfering with the phosphorylation of Phospholipase C Gamma 1 and Linker for Activation of T Cells. This protein can also dephosphorylate the PDGF beta receptor, and may be involved in UV-induced signal transduction. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

PTPRJ: Tyrosine phosphatase which dephosphorylates or contributes to the dephosphorylation of CTNND1, FLT3, PDGFRB, MET, RET (variant MEN2A), KDR, LYN, SRC, MAPK1, MAPK3, EGFR, TJP1, OCLN, PIK3R1 and PIK3R2. Plays a role in cell adhesion, migration, proliferation and differentiation. Involved in vascular development. Regulator of macrophage adhesion and spreading. Positively affects cell-matrix adhesion. Positive regulator of platelet activation and thrombosis. Negative regulator of cell proliferation. Negative regulator of PDGF-stimulated cell migration; through dephosphorylation of PDGFR. Positive regulator of endothelial cell survival, as well as of VEGF-induced SRC and AKT activation; through KDR dephosphorylation. Negative regulator of EGFR signaling pathway; through EGFR dephosphorylation. Enhances the barrier function of epithelial junctions during reassembly. Negatively regulates T-cell receptor (TCR) signaling. Upon T-cell TCR activation, it is up-regulated and excluded from the immunological synapses, while upon T-cell-antigen presenting cells (APC) disengagement, it is no longer excluded and can dephosphorylate PLCG1 and LAT to down-regulate prolongation of signaling. Belongs to the protein-tyrosine phosphatase family. Receptor class 3 subfamily. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: EC 3.1.3.48; Membrane protein, integral; Motility/polarity/chemotaxis; Receptor protein phosphatase, tyrosine

Chromosomal Location of Human Ortholog: 11p11.2

Cellular Component: cell surface; extracellular exosome; immunological synapse; integral component of plasma membrane; intercellular junction; plasma membrane

Molecular Function: beta-catenin binding; delta-catenin binding; gamma-catenin binding; mitogen-activated protein kinase binding; phosphoric monoester hydrolase activity; platelet-derived growth factor receptor binding; protein binding; protein kinase binding; protein tyrosine phosphatase activity

Biological Process: negative regulation of cell growth; negative regulation of cell migration; negative regulation of cell proliferation; negative regulation of epidermal growth factor receptor signaling pathway; negative regulation of MAP kinase activity; negative regulation of platelet-derived growth factor receptor signaling pathway; negative regulation of protein kinase B signaling cascade; negative regulation of T cell receptor signaling pathway; negative regulation of vascular permeability; neutrophil degranulation; platelet-derived growth factor receptor signaling pathway; positive chemotaxis; positive regulation of cell adhesion; positive regulation of focal adhesion assembly; positive regulation of protein kinase B signaling; regulation of cell adhesion; T cell receptor signaling pathway

Disease: Colorectal Cancer