Axin-1 - O15169 (AXIN1_HUMAN)

 

Protein Feature View of PDB entries mapped to a UniProtKB sequence  

  • Number of PDB entries for O15169: 11
 
Function
Component of the beta-catenin destruction complex required for regulating CTNNB1 levels through phosphorylation and ubiquitination, and modulating Wnt-signaling (PubMed:12192039, PubMed:27098453). Controls dorsoventral patterning via two opposing effects; down-regulates CTNNB1 to inhibit the Wnt signaling pathway and ventralize embryos, but also dorsalizes embryos by activating a Wnt-independent JNK signaling pathway (PubMed:12192039). In Wnt signaling, probably facilitates the phosphorylation of CTNNB1 and APC by GSK3B (PubMed:12192039). Likely to function as a tumor suppressor. Enhances TGF-beta signaling by recruiting the RNF111 E3 ubiquitin ligase and promoting the degradation of inhibitory SMAD7 (PubMed:16601693). Also component of the AXIN1-HIPK2-TP53 complex which controls cell growth, apoptosis and development (PubMed:17210684). Facilitates the phosphorylation of TP53 by HIPK2 upon ultraviolet irradiation (PubMed:17210684). UniProt
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Subunit Structure
Homodimer. Interacts with ZBED3; the interaction is direct, enhanced by protein kinase GSK3B and casein kinase CSNK1E activities and decreases GSK3B-induced beta-catenin serine and threonine phosphorylations (By similarity). Component of the beta-catenin destruction complex, containing at least, CTNNB1, an axin and GSK3B, that regulates CTNNB1 protein levels through phosphorylation and ubiquitination. Interacts with CTNNB1 (via the armadillo repeats 2-7). Interacts with GSK3B; the interaction hyperphosphorylates CTNNB1 leading to its ubiquitination and destruction (PubMed:17318175, PubMed:12554650). Component of the AXIN1-HIPK2-TP53 complex (PubMed:17210684). Interacts directly in the complex with TP53 and HIPK2 (PubMed:17210684). Interacts with DAXX; the interaction stimulates the interaction of DAXX with TP53, stimulates 'Ser-46' phosphorylation of TP53 and induces cell death on UV irradiation (PubMed:17210684). Also binds APC, SMAD6, SMAD7 and RNF111 (PubMed:16601693, PubMed:10811618). Interacts with DIXDC1; prevents interaction with MAP3K1 (PubMed:15262978). Interacts with MAP3K4 (PubMed:15262978). Interacts with ANKRD6 and AIDA (By similarity). Interacts with MDFI; the interaction decreases AXIN1-mediated JUN N-terminal kinase (JNK) activation (PubMed:12192039). Interacts with MDFIC; the interaction inhibits beta-cateninin-mediated signaling and AXIN1-mediated JUN N-terminal kinase (JNK) activation (PubMed:12192039). Interacts with LRP5 (via its phosphorylated PPPSP motifs); the interaction is stimulated by WNT1 and GSK3B and activates beta-catenin signaling (PubMed:11336703). Interacts (via the C-terminal) with PPP1CA; the interaction dephosphorylates AXIN1 and regulates interaction with GSK3B (PubMed:9920888). Interacts with PPP2CA; the interaction dephosphorylates AXIN1 (PubMed:9920888). Interacts with MACF1 (By similarity). Found in a complex composed of MACF1, APC, AXIN1, CTNNB1 and GSK3B (By similarity). Interacts with TNKS (PubMed:19759537, PubMed:21478859, PubMed:21799911). Interacts with DAB2; the interaction is mutually exclusive with the AXIN1:PPP1CA interaction (PubMed:12805222). Interacts with WDR26 (PubMed:27098453). UniProt
Domain
The tankyrase-binding motif (also named TBD) is required for interaction with tankyrase TNKS and TNKS2. UniProt
  • Isoforms: 2 , currently showing only the 'canonical' sequence.
This protein in other organisms (by gene name):
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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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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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