Sequence Browser (P17706-4)

Available Structures (Graph-View Mode)

UniProt (Ref Seq)
Displayed Structure
Experimental Tertiary/Complex (PDB:XRay/EM)
Experimental Tertiary/Complex (PDB:NMR)
Modelled Tertiary (Phyre)
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1
415

Isoforms (From UniProt)

Isoform
Remark
Ref
P17706-1
Minor isoform.
P17706-4  
No experimental confirmation available. Gene prediction based on cDNA data.
VSP_054821 VSP_005125
P17706-2
Major isoform. Contains a phosphoserine at position 304. Contains a nuclear location signal at positions 377-381 (Ref.8) and an autoinhibitory region acting through intramolecular interactions is found at positions 353-387.
VSP_005125
P17706-3
No experimental confirmation available.
VSP_043383 VSP_005125
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Protein Information (From UniProt)

Protein:
Tyrosine-protein phosphatase non-receptor type 2
Other Names:
T-cell protein-tyrosine phosphatase
Primary Accession:
P17706
Other Accessions:
A8K955, A8MXU3, K7ENG3, Q96AU5, Q96HR2
Gene :
PTPN2*, synonyms (PTPT)
Organism :
Human
Entry Name :
PTN2_HUMAN
Length :
415
Mass (Da) :
48,473
Last modified :
05-Jan-2009
Version :
v2
Isoforms :
4 
Structures :
Experimental 0 | Phyre prediction 2
Function : Show Hide

Non-receptor type tyrosine-specific phosphatase that dephosphorylates receptor protein tyrosine kinases including INSR, EGFR, CSF1R, PDGFR. Also dephosphorylates non-receptor protein tyrosine kinases like JAK1, JAK2, JAK3, Src family kinases, STAT1, STAT3 and STAT6 either in the nucleus or the cytoplasm. Negatively regulates numerous signaling pathways and biological processes like hematopoiesis, inflammatory response, cell proliferation and differentiation, and glucose homeostasis. Plays a multifaceted and important role in the development of the immune system. Functions in T-cell receptor signaling through dephosphorylation of FYN and LCK to control T-cells differentiation and activation. Dephosphorylates CSF1R, negatively regulating its downstream signaling and macrophage differentiation. Negatively regulates cytokine (IL2/interleukin-2 and interferon)-mediated signaling through dephosphorylation of the cytoplasmic kinases JAK1, JAK3 and their substrate STAT1, that propagate signaling downstream of the cytokine receptors. Also regulates the IL6/interleukin-6 and IL4/interleukin-4 cytokine signaling through dephosphorylation of STAT3 and STAT6 respectively. In addition to the immune system, it is involved in anchorage-dependent, negative regulation of EGF-stimulated cell growth. Activated by the integrin ITGA1/ITGB1, it dephosphorylates EGFR and negatively regulates EGF signaling. Dephosphorylates PDGFRB and negatively regulates platelet-derived growth factor receptor-beta signaling pathway and therefore cell proliferation. Negatively regulates tumor necrosis factor-mediated signaling downstream via MAPK through SRC dephosphorylation. May also regulate the hepatocyte growth factor receptor signaling pathway through dephosphorylation of the hepatocyte growth factor receptor MET. Plays also an important role in glucose homeostasis. For instance, negatively regulates the insulin receptor signaling pathway through the dephosphorylation of INSR and control gluconeogenesis and liver glucose production through negative regulation of the IL6 signaling pathways. May also bind DNA.