Phosphatidylinositol 3,4,5-trisphosphate 5-phosphatase 2 - O15357 (SHIP2_HUMAN)

 

Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for O15357: 9
 
Function
Phosphatidylinositol (PtdIns) phosphatase that specifically hydrolyzes the 5-phosphate of phosphatidylinositol-3,4,5-trisphosphate (PtdIns(3,4,5)P3) to produce PtdIns(3,4)P2, thereby negatively regulating the PI3K (phosphoinositide 3-kinase) pathways. Plays a central role in regulation of PI3K-dependent insulin signaling, although the precise molecular mechanisms and signaling pathways remain unclear. While overexpression reduces both insulin-stimulated MAP kinase and Akt activation, its absence does not affect insulin signaling or GLUT4 trafficking. Confers resistance to dietary obesity. May act by regulating AKT2, but not AKT1, phosphorylation at the plasma membrane. Part of a signaling pathway that regulates actin cytoskeleton remodeling. Required for the maintenance and dynamic remodeling of actin structures as well as in endocytosis, having a major impact on ligand-induced EGFR internalization and degradation. Participates in regulation of cortical and submembraneous actin by hydrolyzing PtdIns(3,4,5)P3 thereby regulating membrane ruffling (PubMed:21624956). Regulates cell adhesion and cell spreading. Required for HGF-mediated lamellipodium formation, cell scattering and spreading. Acts as a negative regulator of EPHA2 receptor endocytosis by inhibiting via PI3K-dependent Rac1 activation. Acts as a regulator of neuritogenesis by regulating PtdIns(3,4,5)P3 level and is required to form an initial protrusive pattern, and later, maintain proper neurite outgrowth. Acts as a negative regulator of the FC-gamma-RIIA receptor (FCGR2A). Mediates signaling from the FC-gamma-RIIB receptor (FCGR2B), playing a central role in terminating signal transduction from activating immune/hematopoietic cell receptor systems. Involved in EGF signaling pathway. Upon stimulation by EGF, it is recruited by EGFR and dephosphorylates PtdIns(3,4,5)P3. Plays a negative role in regulating the PI3K-PKB pathway, possibly by inhibiting PKB activity. Down-regulates Fc-gamma-R-mediated phagocytosis in macrophages independently of INPP5D/SHIP1. In macrophages, down-regulates NF-kappa-B-dependent gene transcription by regulating macrophage colony-stimulating factor (M-CSF)-induced signaling. May also hydrolyze PtdIns(1,3,4,5)P4, and could thus affect the levels of the higher inositol polyphosphates like InsP6. Involved in endochondral ossification. UniProt
Catalytic Activity
1,2-dihexadecanoyl-sn-glycero-3-phospho-1D-myo-inositol-3,4,5-trisphosphate + H2O = 1,2-dihexadecanoyl-sn-glycero-3-phospho-1D-myo-inositol-3,4-bisphosphate + phosphate UniProt
Pathway Maps
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Subunit Structure
Interacts with tyrosine phosphorylated form of SHC1 (PubMed:9660833, PubMed:10194451, PubMed:11349134). Interacts with EGFR (PubMed:11349134). Upon stimulation by the EGF signaling pathway, it forms a complex with SHC1 and EGFR (PubMed:11349134). Interacts with cytoskeletal protein SORBS3/vinexin, promoting its localization to the periphery of cells (PubMed:16302969). Forms a complex with filamin (FLNA or FLNB), actin, GPIb (GP1BA or GP1BB) that regulates cortical and submembraneous actin (PubMed:11739414, PubMed:12676785). Interacts with c-Met/MET, when c-Met/MET is phosphorylated on 'Tyr-1356' (PubMed:15735664). Interacts with p130Cas/BCAR1 (PubMed:11158326). Interacts with CENTD3/ARAP3 via its SAM domain (PubMed:17314030). Interacts with c-Cbl/CBL and CAP/SORBS1 (PubMed:12504111). Interacts with activated EPHA2 receptor (PubMed:17135240). Interacts with receptor FCGR2A (PubMed:12690104). Interacts with receptor FCGR2B (PubMed:11016922). Interacts with tyrosine kinase ABL1 (PubMed:10194451). Interacts with tyrosine kinase TEC (By similarity). Interacts with CSF1R (By similarity). Interacts (via N-terminus) with SH3YL1 (via SH3 domain) (PubMed:21624956). Interacts with FCRL6 (tyrosine phosphorylated form) (PubMed:20933011). UniProt
Domain
The NPXY sequence motif found in many tyrosine-phosphorylated proteins is required for the specific binding of the PID domain. UniProt
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Data in green originates from UniProtKB  
Variation data (sourced from UniProt) shows non-genetic variation from the ExPASy   and dbSNP   websites.
Data in yellow originates from Pfam  , by interacting with the HMMER3 web site  
Data in purple originates from Phosphosite  .
Data in orange originates from the SCOP   (version 1.75) and SCOPe   (version 2.04) classifications.
Data in grey has been calculated using BioJava  . Protein disorder predictions are based on JRONN (Troshin, P. and Barton, G. J. unpublished), a Java implementation of RONN  
  • Red: potentially disorderd region
  • Blue: probably ordered region.
Hydropathy has been calculated using a sliding window of 15 residues and summing up scores from standard hydrophobicity tables.
  • Red: hydrophobic
  • Blue: hydrophilic.
Data in lilac represent the genomic exon structure projected onto the UniProt sequence.
Data in blue originates from PDB
  • Secstruc: Secondary structure projected from representative PDB entries onto the UniProt sequence.
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Validation Track

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Data in red indicates combined ranges of Homology Models from the SWISS-MODEL Repository  
The PDB to UniProt mapping is based on the data provided by the EBI SIFTS project. See also Velankar et al., Nucleic Acids Research 33, D262-265 (2005).
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