Phosphatidylinositol 3,4,5-trisphosphate 5-phosphatase 1 - Q92835 (SHIP1_HUMAN)

 

Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for Q92835: 2
 
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 (PubMed:8723348, PubMed:10764818, PubMed:8769125). Able also to hydrolyzes the 5-phosphate of phosphatidylinositol-4,5-bisphosphate (PtdIns(4,5)P3) and inositol 1,3,4,5-tetrakisphosphate (PubMed:9108392, PubMed:10764818, PubMed:8769125). Acts as a negative regulator of B-cell antigen receptor signaling. Mediates signaling from the FC-gamma-RIIB receptor (FCGR2B), playing a central role in terminating signal transduction from activating immune/hematopoietic cell receptor systems. Acts as a negative regulator of myeloid cell proliferation/survival and chemotaxis, mast cell degranulation, immune cells homeostasis, integrin alpha-IIb/beta-3 signaling in platelets and JNK signaling in B-cells. Regulates proliferation of osteoclast precursors, macrophage programming, phagocytosis and activation and is required for endotoxin tolerance. Involved in the control of cell-cell junctions, CD32a signaling in neutrophils and modulation of EGF-induced phospholipase C activity (PubMed:16682172). Key regulator of neutrophil migration, by governing the formation of the leading edge and polarization required for chemotaxis. Modulates FCGR3/CD16-mediated cytotoxicity in NK cells. Mediates the activin/TGF-beta-induced apoptosis through its Smad-dependent expression. UniProt
Catalytic Activity
a 1,2-diacyl-sn-glycero-3-phospho-1D-myo-inositol-4,5-bisphosphate + H2O = 1,2-diacyl-sn-glycero-3-phospho-1D-myo-inositol 4-phosphate + phosphate UniProt
Pathway Maps
Maps:       
Reactions:
      ESCHER  BiGG
Subunit Structure
Interacts with tyrosine phosphorylated form of SHC1 (PubMed:8874179). Interacts with tyrosine phosphorylated form of DOK1 (PubMed:10822173). Interacts with tyrosine phosphorylated form of DOK3 (By similarity). Interacts with tyrosine phosphorylated form of SLAMF1/CD150 (PubMed:10229804). Interacts with PTPN11 in response to IL-3 (By similarity). Interacts with receptor EPOR (By similarity). Interacts with receptors MS4A2/FCER1B and FCER1G (By similarity). Interacts with receptors FCGR2B and FCGR3 (By similarity). Interacts with receptor FCGR2A, leading to regulate gene expression during the phagocytic process (By similarity). Interacts with GRB2 (PubMed:8723348, PubMed:9108392). Interacts with PLCG1 (By similarity). Interacts with tyrosine kinases SRC and TEC (By similarity). Interacts with c-Met/MET (By similarity). Interacts with MILR1 (tyrosine-phosphorylated) (By similarity). Can weakly interact (via NPXY motif 2) with DAB2 (via PID domain); the interaction is impaired by tyrosine phosphorylation of the NPXY motif (By similarity). Interacts with FCRL3 and FCRL6 (tyrosine phosphorylated form) (PubMed:20933011, PubMed:19843936). 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 origin/color codes
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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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