Disabled homolog 2-interacting protein - Q5VWQ8 (DAB2P_HUMAN)

 

Protein Feature View of PDB entries mapped to a UniProtKB sequence  

 
Function
Functions as a scaffold protein implicated in the regulation of a large spectrum of both general and specialized signaling pathways. Involved in several processes such as innate immune response, inflammation and cell growth inhibition, apoptosis, cell survival, angiogenesis, cell migration and maturation. Plays also a role in cell cycle checkpoint control; reduces G1 phase cyclin levels resulting in G0/G1 cell cycle arrest. Mediates signal transduction by receptor-mediated inflammatory signals, such as the tumor necrosis factor (TNF), interferon (IFN) or lipopolysaccharide (LPS). Modulates the balance between phosphatidylinositol 3-kinase (PI3K)-AKT-mediated cell survival and apoptosis stimulated kinase (MAP3K5)-JNK signaling pathways; sequesters both AKT1 and MAP3K5 and counterbalances the activity of each kinase by modulating their phosphorylation status in response to proinflammatory stimuli. Acts as a regulator of the endoplasmic reticulum (ER) unfolded protein response (UPR) pathway; specifically involved in transduction of the ER stress-response to the JNK cascade through ERN1. Mediates TNF-alpha-induced apoptosis activation by facilitating dissociation of inhibitor 14-3-3 from MAP3K5; recruits the PP2A phosphatase complex which dephosphorylates MAP3K5 on 'Ser-966', leading to the dissociation of 13-3-3 proteins and activation of the MAP3K5-JNK signaling pathway in endothelial cells. Mediates also TNF/TRAF2-induced MAP3K5-JNK activation, while it inhibits CHUK-NF-kappa-B signaling. Acts a negative regulator in the IFN-gamma-mediated JAK-STAT signaling cascade by inhibiting smooth muscle cell (VSMCs) proliferation and intimal expansion, and thus, prevents graft arteriosclerosis (GA). Acts as a GTPase-activating protein (GAP) for the ADP ribosylation factor 6 (ARF6) and Ras. Promotes hydrolysis of the ARF6-bound GTP and thus, negatively regulates phosphatidylinositol 4,5-bisphosphate (PIP2)-dependent TLR4-TIRAP-MyD88 and NF-kappa-B signaling pathways in endothelial cells in response to lipopolysaccharides (LPS). Binds specifically to phosphatidylinositol 4-phosphate (PtdIns4P) and phosphatidylinositol 3-phosphate (PtdIns3P). In response to vascular endothelial growth factor (VEGFA), acts as a negative regulator of the VEGFR2-PI3K-mediated angiogenic signaling pathway by inhibiting endothelial cell migration and tube formation. In the developing brain, promotes both the transition from the multipolar to the bipolar stage and the radial migration of cortical neurons from the ventricular zone toward the superficial layer of the neocortex in a glial-dependent locomotion process. Probable downstream effector of the Reelin signaling pathway; promotes Purkinje cell (PC) dendrites development and formation of cerebellar synapses. Functions also as a tumor suppressor protein in prostate cancer progression; prevents cell proliferation and epithelial-to-mesenchymal transition (EMT) through activation of the glycogen synthase kinase-3 beta (GSK3B)-induced beta-catenin and inhibition of PI3K-AKT and Ras-MAPK survival downstream signaling cascades, respectively. UniProt
Pathway Maps
Maps:       
Reactions:
      ESCHER  BiGG
Subunit Structure
On plasma membrane, exists in an inactive form complexed with TNFR1; in response to TNF-alpha, dissociates from TNFR1 complex, translocates to cytoplasm and forms part of an intracellular signaling complex comprising TRADD, RALBP1, TRAF2 and MAP3K5. Interacts with DAB1. Interacts (via NPXY motif) with DAB2 (via PID domain). Interacts (via PH domain) with ERN1 (By similarity). Part of a cytoplasmic complex made of HIPK1, DAB2IP and MAP3K5 in response to TNF-alpha; this complex formation promotes MAP3K5-JNK activation and subsequent apoptosis. Interacts (via N-terminal domain) with JAK2; the interaction occurs in a IFNG/IFN-gamma-dependent manner and inhibits JAK2 autophosphorylation activity. Interacts (via C2 domain) with GSK3B; the interaction stimulates GSK3B kinase activation. Interacts (via C2 domain) with PPP2CA. Interacts (via proline-rich motif) with a regulatory p85 subunit (via SH3 domain) of the PI3K complex; the interaction inhibits the PI3K-AKT complex activity in a TNF-alpha-dependent manner in prostate cancer (PCa) cells. Interacts with AKT1; the interaction is increased in a TNF-alpha-induced manner. Interacts (via C2 domain and active form preferentially) with KDR/VEGFR2 (tyrosine-phosphorylated active form preferentially); the interaction occurs at the late phase of VEGFA response and inhibits KDR/VEGFR2 activity. Interacts (via N-terminus C2 domain) with MAP3K5 ('Ser-966' dephosphorylated form preferentially); the interaction occurs in a TNF-alpha-induced manner. Interacts (via Ras-GAP domain) with the catalytic subunit of protein phosphatase PP2A; the interaction occurs in resting endothelial cells, is further enhanced by TNF-alpha stimulation and is required to bridge PP2A to MAP3K5. Interacts (via C-terminus PER domain) with TRAF2 (via zinc fingers); the interaction occurs in a TNF-alpha-dependent manner. Interacts with 14-3-3 proteins; the interaction occurs in a TNF-alpha-dependent manner. Interacts (via Ras-GAP domain) with RIPK1 (via kinase domain); the interaction occurs in a TNF-alpha-dependent manner. UniProt
Domain
The C2 and Ras-GAP domains constitutively bind to MAP3K5 and facilitate the release of 14-3-3 proteins from MAP3K5. The PH and Ras-GAP domains, but not the NPXY motif, are crucial for its cell membrane localization and neuronal migration function. The PH domain is necessary but not sufficient to activate the JNK signaling pathway through ERN1 (By similarity). Exists in a closed inactive form by an intramolecular interaction between the N- and the C-terminal domains. The proline-rich motif is critical both for PI3K-AKT activity inhibition and MAP3K5 activation. The PH and C2 domains are necessary for the binding to phosphatidylinositol phosphate. The Ras-GAP domain is necessary for its tumor-suppressive function. UniProt
Legend
The Protein Feature View requires a browser that supports SVG (Scalable Vector Graphics). Mouse over tracks and labels for more information.
Data origin/color codes
The vertical color bar on the left side indicates data provenance.
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.
Sequence Mismatches It is now possible to see information about expression tags, cloning artifacts, and many other details related to sequence mismatches.
Icons represent a number of different sequence modifications that can be observed in PDB files. For example the 'T' icon T represents expression tags that have been added to the sequence. The 'E' icon E represents an engineered mutation. However, besides these two, there are many other icons. For more information about the meaning and exact position of a sequence modification, move the cursor over the icon.
Validation Track

For more details on the Validation Track (Structure Summary Page only) see the dedicated help page.

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).
Organism icons generated by flaticon.com under CC BY. The authors are: Freepik, Icons8, OCHA, Scott de Jonge.

For more details on the Protein Feature view see the dedicated help page.