Degradation of beta-catenin by the destruction complex (Homo sapiens)
From WikiPathways
Description
The beta-catenin destruction complex plays a key role in the canonical Wnt signaling pathway. In the absence of Wnt signaling, this complex controls the levels of cytoplamic beta-catenin. Beta-catenin associates with and is phosphorylated by the destruction complex. Phosphorylated beta-catenin is recognized and ubiquitinated by the SCF-beta TrCP ubiquitin ligase complex and is subsequently degraded by the proteasome (reviewed in Kimelman and Xu, 2006).
View original pathway at:Reactome.
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Bibliography
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- Kim MJ, Chia IV, Costantini F.; ''SUMOylation target sites at the C terminus protect Axin from ubiquitination and confer protein stability.''; PubMed Europe PMC Scholia
- Chen G, Courey AJ.; ''Groucho/TLE family proteins and transcriptional repression.''; PubMed Europe PMC Scholia
- Pinto M, Lobe CG.; ''Products of the grg (Groucho-related gene) family can dimerize through the amino-terminal Q domain.''; PubMed Europe PMC Scholia
- Valenta T, Lukas J, Korinek V.; ''HMG box transcription factor TCF-4's interaction with CtBP1 controls the expression of the Wnt target Axin2/Conductin in human embryonic kidney cells.''; PubMed Europe PMC Scholia
- Major MB, Camp ND, Berndt JD, Yi X, Goldenberg SJ, Hubbert C, Biechele TL, Gingras AC, Zheng N, Maccoss MJ, Angers S, Moon RT.; ''Wilms tumor suppressor WTX negatively regulates WNT/beta-catenin signaling.''; PubMed Europe PMC Scholia
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- Cuilliere-Dartigues P, El-Bchiri J, Krimi A, Buhard O, Fontanges P, Fléjou JF, Hamelin R, Duval A.; ''TCF-4 isoforms absent in TCF-4 mutated MSI-H colorectal cancer cells colocalize with nuclear CtBP and repress TCF-4-mediated transcription.''; PubMed Europe PMC Scholia
- Chen G, Fernandez J, Mische S, Courey AJ.; ''A functional interaction between the histone deacetylase Rpd3 and the corepressor groucho in Drosophila development.''; PubMed Europe PMC Scholia
History
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External references
DataNodes
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Name | Type | Database reference | Comment |
---|---|---|---|
'canonical' WNT
target gene transcripts | Complex | R-HSA-4411358 (Reactome) | |
'canonical' WNT target genes | Complex | R-HSA-4411390 (Reactome) | |
26S proteasome | Complex | R-HSA-68819 (Reactome) | |
ADP | Metabolite | CHEBI:16761 (ChEBI) | |
AES | Protein | Q08117 (Uniprot-TrEMBL) | |
AES | Protein | Q08117 (Uniprot-TrEMBL) | |
AMER1 | Protein | Q5JTC6 (Uniprot-TrEMBL) | |
AMER1 gene | GeneProduct | ENSG00000184675 (Ensembl) | |
AMER1 | Protein | Q5JTC6 (Uniprot-TrEMBL) | |
APC | Protein | P25054 (Uniprot-TrEMBL) | |
ATP | Metabolite | CHEBI:15422 (ChEBI) | |
AXIN1 | Protein | O15169 (Uniprot-TrEMBL) | |
AXIN1 gene | GeneProduct | ENSG00000103126 (Ensembl) | |
AXIN1 | Protein | O15169 (Uniprot-TrEMBL) | |
AXIN2 gene | Protein | ENSG00000168646 (Ensembl) | |
AXIN2 mRNA | Protein | ENST00000307078 (Ensembl) | |
AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | Complex | R-HSA-195250 (Reactome) | |
BTRC | Protein | Q9Y297 (Uniprot-TrEMBL) | |
CSNK1A1 | Protein | P48729 (Uniprot-TrEMBL) | |
CSNK1A1 | Protein | P48729 (Uniprot-TrEMBL) | |
CTBP1 | Protein | Q13363 (Uniprot-TrEMBL) | |
CTBP2 | Protein | P56545 (Uniprot-TrEMBL) | |
CTBPs | Complex | R-HSA-5333992 (Reactome) | |
CTNNB1 | Protein | P35222 (Uniprot-TrEMBL) | |
CTNNB1-1 | Protein | P35222-1 (Uniprot-TrEMBL) | |
CUL1 | Protein | Q13616 (Uniprot-TrEMBL) | |
FRAT1 | Protein | Q92837 (Uniprot-TrEMBL) | |
FRAT1,2:GSK3beta | Complex | R-HSA-1226052 (Reactome) | |
FRAT2 | Protein | O75474 (Uniprot-TrEMBL) | |
GSK3B | Protein | P49841 (Uniprot-TrEMBL) | |
GSK3B | Protein | P49841 (Uniprot-TrEMBL) | |
HDAC1 | Protein | Q13547 (Uniprot-TrEMBL) | |
HDAC1 | Protein | Q13547 (Uniprot-TrEMBL) | |
K63polyUb-APC | Protein | P25054 (Uniprot-TrEMBL) | |
K63polyUb-APC | Protein | P25054 (Uniprot-TrEMBL) | |
K63polyUb | R-HSA-450152 (Reactome) | ||
LEF1 | Protein | Q9UJU2 (Uniprot-TrEMBL) | |
PP2A | Complex | R-HSA-196206 (Reactome) | |
PPP2CA | Protein | P67775 (Uniprot-TrEMBL) | |
PPP2CB | Protein | P62714 (Uniprot-TrEMBL) | |
PPP2R1A | Protein | P30153 (Uniprot-TrEMBL) | |
PPP2R1B | Protein | P30154 (Uniprot-TrEMBL) | |
PPP2R5A | Protein | Q15172 (Uniprot-TrEMBL) | |
PPP2R5B | Protein | Q15173 (Uniprot-TrEMBL) | |
PPP2R5C | Protein | Q13362 (Uniprot-TrEMBL) | |
PPP2R5D | Protein | Q14738 (Uniprot-TrEMBL) | |
PPP2R5E | Protein | Q16537 (Uniprot-TrEMBL) | |
PSMA1 | Protein | P25786 (Uniprot-TrEMBL) | |
PSMA2 | Protein | P25787 (Uniprot-TrEMBL) | |
PSMA3 | Protein | P25788 (Uniprot-TrEMBL) | |
PSMA4 | Protein | P25789 (Uniprot-TrEMBL) | |
PSMA5 | Protein | P28066 (Uniprot-TrEMBL) | |
PSMA6 | Protein | P60900 (Uniprot-TrEMBL) | |
PSMA7 | Protein | O14818 (Uniprot-TrEMBL) | |
PSMA8 | Protein | Q8TAA3 (Uniprot-TrEMBL) | |
PSMB1 | Protein | P20618 (Uniprot-TrEMBL) | |
PSMB10 | Protein | P40306 (Uniprot-TrEMBL) | |
PSMB11 | Protein | A5LHX3 (Uniprot-TrEMBL) | |
PSMB2 | Protein | P49721 (Uniprot-TrEMBL) | |
PSMB3 | Protein | P49720 (Uniprot-TrEMBL) | |
PSMB4 | Protein | P28070 (Uniprot-TrEMBL) | |
PSMB5 | Protein | P28074 (Uniprot-TrEMBL) | |
PSMB6 | Protein | P28072 (Uniprot-TrEMBL) | |
PSMB7 | Protein | Q99436 (Uniprot-TrEMBL) | |
PSMB8 | Protein | P28062 (Uniprot-TrEMBL) | |
PSMB9 | Protein | P28065 (Uniprot-TrEMBL) | |
PSMC1 | Protein | P62191 (Uniprot-TrEMBL) | |
PSMC2 | Protein | P35998 (Uniprot-TrEMBL) | |
PSMC3 | Protein | P17980 (Uniprot-TrEMBL) | |
PSMC4 | Protein | P43686 (Uniprot-TrEMBL) | |
PSMC5 | Protein | P62195 (Uniprot-TrEMBL) | |
PSMC6 | Protein | P62333 (Uniprot-TrEMBL) | |
PSMD1 | Protein | Q99460 (Uniprot-TrEMBL) | |
PSMD10 | Protein | O75832 (Uniprot-TrEMBL) | |
PSMD11 | Protein | O00231 (Uniprot-TrEMBL) | |
PSMD12 | Protein | O00232 (Uniprot-TrEMBL) | |
PSMD13 | Protein | Q9UNM6 (Uniprot-TrEMBL) | |
PSMD14 | Protein | O00487 (Uniprot-TrEMBL) | |
PSMD2 | Protein | Q13200 (Uniprot-TrEMBL) | |
PSMD3 | Protein | O43242 (Uniprot-TrEMBL) | |
PSMD4 | Protein | P55036 (Uniprot-TrEMBL) | |
PSMD5 | Protein | Q16401 (Uniprot-TrEMBL) | |
PSMD6 | Protein | Q15008 (Uniprot-TrEMBL) | |
PSMD7 | Protein | P51665 (Uniprot-TrEMBL) | |
PSMD8 | Protein | P48556 (Uniprot-TrEMBL) | |
PSMD9 | Protein | O00233 (Uniprot-TrEMBL) | |
PSME1 | Protein | Q06323 (Uniprot-TrEMBL) | |
PSME2 | Protein | Q9UL46 (Uniprot-TrEMBL) | |
PSME3 | Protein | P61289 (Uniprot-TrEMBL) | |
PSME4 | Protein | Q14997 (Uniprot-TrEMBL) | |
PSMF1 | Protein | Q92530 (Uniprot-TrEMBL) | |
RBX1 | Protein | P62877 (Uniprot-TrEMBL) | |
RBX1:SKP1:CUL1:beta-TrCP1:phosphorylated beta-catenin complex | Complex | R-HSA-2130280 (Reactome) | B-TrCP associates with phosphorylated beta-catenin through the B-TrCP WD40 repeat region. Currently, it is unclear whether the ubiquitin ligase binds beta-catenin after it leaves the complex. It is equally possible that it binds beta-catenin while beta-catenin is still bound to Axin. |
RPS27A(1-76) | Protein | P62979 (Uniprot-TrEMBL) | |
SCF beta-TrCP complex | Complex | R-HSA-206748 (Reactome) | |
SKP1 | Protein | P63208 (Uniprot-TrEMBL) | |
TCF7 | Protein | P36402 (Uniprot-TrEMBL) | |
TCF7L1 | Protein | Q9HCS4 (Uniprot-TrEMBL) | |
TCF7L2 | Protein | Q9NQB0 (Uniprot-TrEMBL) | |
TCF7L2/TCF7L1:CTBPs | Complex | R-HSA-5334048 (Reactome) | |
TCF7L2/TCF7L1 | Complex | R-HSA-5334046 (Reactome) | |
TLE tetramer | Complex | R-HSA-3299565 (Reactome) | |
TLE1 | Protein | Q04724 (Uniprot-TrEMBL) | |
TLE2 | Protein | Q04725 (Uniprot-TrEMBL) | |
TLE3 | Protein | Q04726 (Uniprot-TrEMBL) | |
TLE4 | Protein | Q04727 (Uniprot-TrEMBL) | |
TLE:AES | Complex | R-HSA-4649013 (Reactome) | |
TLE:HDAC1 | Complex | R-HSA-3772506 (Reactome) | |
TLE | Complex | R-HSA-4641228 (Reactome) | |
TLE | Complex | R-HSA-4649011 (Reactome) | |
UBA52(1-76) | Protein | P62987 (Uniprot-TrEMBL) | |
UBB(1-76) | Protein | P0CG47 (Uniprot-TrEMBL) | |
UBB(153-228) | Protein | P0CG47 (Uniprot-TrEMBL) | |
UBB(77-152) | Protein | P0CG47 (Uniprot-TrEMBL) | |
UBC(1-76) | Protein | P0CG48 (Uniprot-TrEMBL) | |
UBC(153-228) | Protein | P0CG48 (Uniprot-TrEMBL) | |
UBC(229-304) | Protein | P0CG48 (Uniprot-TrEMBL) | |
UBC(305-380) | Protein | P0CG48 (Uniprot-TrEMBL) | |
UBC(381-456) | Protein | P0CG48 (Uniprot-TrEMBL) | |
UBC(457-532) | Protein | P0CG48 (Uniprot-TrEMBL) | |
UBC(533-608) | Protein | P0CG48 (Uniprot-TrEMBL) | |
UBC(609-684) | Protein | P0CG48 (Uniprot-TrEMBL) | |
UBC(77-152) | Protein | P0CG48 (Uniprot-TrEMBL) | |
Ub | Complex | R-HSA-113595 (Reactome) | |
beta-catenin:p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | Complex | R-HSA-195301 (Reactome) | |
beta-catenin | Complex | R-HSA-191727 (Reactome) | |
p-AXIN:CK1alpha:GSK3B:phospho-APC (20 aa repeat region):PP2A:AMER1 complex | Complex | R-HSA-196222 (Reactome) | In this complex Axin is bound to beta-catenin. |
p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | Complex | R-HSA-3601577 (Reactome) | |
p-S33,S37,S45,T41-CTNNB1-1 | Protein | P35222-1 (Uniprot-TrEMBL) | |
p-S33,S37,T41,S45-beta-catenin:p-AXIN:CK1alpha:GSK3B:phospho-ub-APC (20 aa repeat region):PP2A:AMER1 complex | Complex | R-HSA-195297 (Reactome) | In this complex Axin is bound to beta-catenin. |
p-S33,S37,T41,S45-beta-catenin:p-AXIN:CK1alpha:GSK3B:phospho-ub-APC (20 aa repeat region):PP2A:AMER1 complex | Complex | R-HSA-195322 (Reactome) | In this form of the destruction complex, beta-catenin is no longer associated with Axin, but instead with phospho-(20aa) APC. |
p-S33,S37,T41,S45-beta-catenin:p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | Complex | R-HSA-195282 (Reactome) | |
p-S37,S45,T41-CTNNB1-1 | Protein | P35222-1 (Uniprot-TrEMBL) | |
p-S37,T41,S45-beta-catenin:p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | Complex | R-HSA-195305 (Reactome) | |
p-S45,T41-CTNNB1-1 | Protein | P35222-1 (Uniprot-TrEMBL) | |
p-S45-CTNNB1-1 | Protein | P35222-1 (Uniprot-TrEMBL) | |
p-T41,S45-beta-catenin:p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | Complex | R-HSA-195313 (Reactome) | |
p-T519,S524,S531-AXIN1 | Protein | O15169 (Uniprot-TrEMBL) | |
p-ub-APC | Protein | P25054 (Uniprot-TrEMBL) | |
pS45-beta-catenin:p-Axin:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | Complex | R-HSA-195277 (Reactome) | |
ubiquitinated phospho-beta-catenin:RBX1:SCF(beta-TrCP1) complex | Complex | R-HSA-2130284 (Reactome) | |
unknown ligase | R-HSA-5250898 (Reactome) |
Annotated Interactions
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Source | Target | Type | Database reference | Comment |
---|---|---|---|---|
'canonical' WNT
target gene transcripts | Arrow | R-HSA-5229348 (Reactome) | ||
'canonical' WNT target genes | R-HSA-5229348 (Reactome) | |||
26S proteasome | mim-catalysis | R-HSA-2130282 (Reactome) | ||
ADP | Arrow | R-HSA-195275 (Reactome) | ||
ADP | Arrow | R-HSA-195283 (Reactome) | ||
ADP | Arrow | R-HSA-195287 (Reactome) | ||
ADP | Arrow | R-HSA-195300 (Reactome) | ||
ADP | Arrow | R-HSA-195318 (Reactome) | ||
ADP | Arrow | R-HSA-5229343 (Reactome) | ||
AES | R-HSA-4649028 (Reactome) | |||
AMER1 gene | R-HSA-5251557 (Reactome) | |||
AMER1 | Arrow | R-HSA-5251557 (Reactome) | ||
AMER1 | R-HSA-195251 (Reactome) | |||
APC | R-HSA-5246693 (Reactome) | |||
ATP | R-HSA-195275 (Reactome) | |||
ATP | R-HSA-195283 (Reactome) | |||
ATP | R-HSA-195287 (Reactome) | |||
ATP | R-HSA-195300 (Reactome) | |||
ATP | R-HSA-195318 (Reactome) | |||
ATP | R-HSA-5229343 (Reactome) | |||
AXIN1 gene | R-HSA-5251555 (Reactome) | |||
AXIN1 | Arrow | R-HSA-5251555 (Reactome) | ||
AXIN1 | R-HSA-195251 (Reactome) | |||
AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | Arrow | R-HSA-195251 (Reactome) | ||
AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | R-HSA-5229343 (Reactome) | |||
AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | mim-catalysis | R-HSA-5229343 (Reactome) | ||
CSNK1A1 | R-HSA-195251 (Reactome) | |||
CTBPs | R-HSA-5334050 (Reactome) | |||
FRAT1,2:GSK3beta | TBar | R-HSA-195283 (Reactome) | ||
FRAT1,2:GSK3beta | TBar | R-HSA-195287 (Reactome) | ||
FRAT1,2:GSK3beta | TBar | R-HSA-195300 (Reactome) | ||
GSK3B | R-HSA-195251 (Reactome) | |||
HDAC1 | R-HSA-4641231 (Reactome) | |||
K63polyUb-APC | Arrow | R-HSA-5246693 (Reactome) | ||
K63polyUb-APC | R-HSA-195251 (Reactome) | |||
K63polyUb | R-HSA-5246693 (Reactome) | |||
PP2A | R-HSA-195251 (Reactome) | |||
R-HSA-195251 (Reactome) | The exact composition of the destruction complex is not known. A number of components appear to form a core complex, while others may associate with the complex transiently when a Wnt signal is present (reviewed in Kimelman and Xu, 2006). The core components include Axin, glycogen synthase kinase 3 (GSK-3), Casein kinase 1 (CKI) alpha, beta-catenin, Protein phosphatase 2A (PP2A) and Adenomatous Polyposis Coli (APC). CK1 epsilon, Diversin and PP1 may also be components of the complex. | |||
R-HSA-195275 (Reactome) | APC is phosphorylated on the 20 aa repeats by CK1 and potentially GSK-3. This significantly increases the binding affinity of the APC 20 aa repeats for beta-catenin, causing one of them to bind b-catenin in the same region as beta-catenin binds Axin, thus displacing beta-catenin from Axin ( Step 5 above) (Reviewed in Kimelman, 2006). | |||
R-HSA-195280 (Reactome) | The phosphorylation of the 20 aa repeats in APC results in an increase in affinity for beta-catenin (Ha et al., 2004, Xing et al., 2004; Liu et al., 2006). The binding site of phospho -(20 aa) APC on beta-catenin overlaps the binding site of Axin on beta catenin. In addition, phosphorylated APC prevents the association of Axin with beta-catenin (Ha et al., 2004, Xing et al., 2004). In this model, phosphorylated APC may compete with Axin for beta-catenin binding, resulting in dissociation of the Axin:beta-catenin interaction in the destruction complex (see Kimelman and Xu 2006). | |||
R-HSA-195283 (Reactome) | Phospho-(Ser45, Thr41) beta-catenin is phosphorylated by GSK3 at Ser37. | |||
R-HSA-195287 (Reactome) | Following CKI-mediated phosphorylation at Ser45, beta-catenin is phosphorylated by GSK3 at Thr41. | |||
R-HSA-195300 (Reactome) | Beta-catenin is then phosphorylated at Ser33. Phosphorylated S37 and S33 together with neighboring residues constitute the recognition motif for beta-TrCP. | |||
R-HSA-195304 (Reactome) | Beta-catenin associates with the destruction complex through an interaction with Axin and or APC. This association may also involve interactions with the 15 aa repeats in APC (Spink et al., 2001) or the third APC 20aa repeat and its N-terminal flanking residues (Ha et al., 2004, Xing et al., 2004; Liu et al., 2006). | |||
R-HSA-195318 (Reactome) | CK1a binds to Axin and phosphorylates beta-catenin at Ser45 priming GSK3 mediated phosphorylation at the more N-terminal residues (Amit et al., 2002; Liu et al., 2002; Yanagawa et al., 2002). | |||
R-HSA-2130279 (Reactome) | B-TrCP associates with phosphorylated beta-catenin through the B-TrCP WD40 repeat region. Currently, it is unclear whether the ubiquitin ligase binds beta-catenin after it leaves the complex. It is equally possible that it binds beta-catenin while beta-catenin is still bound to Axin. | |||
R-HSA-2130282 (Reactome) | Ubiquitinated beta-catenin is degraded by the proteasome. | |||
R-HSA-2130286 (Reactome) | Beta-catenin is ubiquitinated by the SCF-B-TrCP1 complex. | |||
R-HSA-4641229 (Reactome) | TCF1, LEF1, TCF3 and TCF4 are HMG box-containing DNA-binding proteins that recognize WNT-responsive elements (WREs) in the promoters of WNT target genes (reviewed in Brantjes et al, 2002). In the absence of a WNT signal, promoter-bound TCF/LEF is bound by one of four Groucho homologues, TLE1, 2, 3 or 4 (Levanon et al, 1998; Brantjes et al, 2001; Daniels and Weis, 2005). Groucho/TLE proteins are co-repressors for a variety of DNA-binding transcription factors and mediate repression at least in part through their interaction with histone deacetylases such as RPD3/HDAC1 (Acre et al, 2009; Brantjes et al, 2001; Chen et al, 1999; reviewed in Chen and Courey, 2000). Groucho proteins have been shown to homo-tetramerize through a glutamine rich Q domain at the N-terminus, and this oligomerization is required for repression. The Q domain is also sufficient for interaction with TCF/LEF proteins (Brantjes et al, 2001; Chen et al, 1998; Pinto and Lobe, 1996; Song et al, 2004). Studies with purified proteins have shown that human TLE1 and 2 bind to an amino-terminal truncated form of LEF1(69-397) with an affinity comparable to that for full length LEF1 (Daniels and Weis, 2005). | |||
R-HSA-4641231 (Reactome) | Groucho/TLE mediates repression of WNT target genes in part by recruiting a histone deacetlyase to the promoter. The weakly conserved central GP domain of Groucho/TLE has been shown to interact with the histone deacetylase RPD3/HDAC1 (Brantjes et al, 2001; Chen et al, 1999). Knockdown of rpd3 in Drosophila cells, or treatment of human or Drosophila cells with the histone deacetylase inhibitor Trichostatin A significantly decreases repression of a Groucho/TLE dependent reporter gene, and Groucho and RPD3 have been shown to co-localize to chromatin of target genes by ChIP leading to deacetylation of H3K9, H3K14, K4K5, H4K8 and H4K12 (Chen et al, 1999; Choi et al 1999; Winkler et al, 2010). | |||
R-HSA-4649028 (Reactome) | AES is a naturally occuring truncated form of TLE that contains only the Q and GP domain. AES has been shown to have a dominant negative effect on TLE-mediated repression (Miyasaka et al, 1993; Roose et al, 1998; Ren et al, 1999; Swingler et al, 2004). AES is believed to form oligomers with full length TLE proteins mediated by the Q domains; because AES is unable to interact with HDAC1, these oligomers are thought to be non-functional (Muhr et al, 2001; Brantjes et al, 2001). | |||
R-HSA-5229343 (Reactome) | In the absence of WNT signal, AXIN is a phosphoprotein; candidate kinases include both GSK3beta and CK1 (Ikeda et al, 1998; Willert et al, 1999; Jho et al, 1999; Yamamoto et al, 1999; Luo et al, 2007). Phosphorylation of AXIN is thought to increase its binding affinity for beta-catenin and GSK3beta, stabilizing the destruction complex and promoting efficient degradation of beta-catenin (Willert et al, 1999; Jho et al, 1999; Luo et al, 2007). A more recent model suggests that AXIN phosphorylation may disrupt an intramolecular interaction between its DIX domain and the beta-catenin binding region, which would otherwise keep AXIN in a 'closed' inactive state (Kim et al, 2013). Activation of the WNT pathway upon ligand binding favours dephosphorylation of AXIN by inactivating the kinases and allowing the steady state dephosphorylation by candidate phosphatases PP2A and PP1 to predominate (Willert et al, 1999; Luo et al, 2007; reviewed in Saito-Diaz et al, 2013). | |||
R-HSA-5229348 (Reactome) | Transcription of WNT genes is repressed in the absence of WNT signal by TLE:HDAC complexes (reviewed in Cinnamon and Paroush, 2008; Saito-Diaz et al, 2013). Represssion may also be mediated by CTBP proteins binding to TCF7L1 and TCF7L3 (Duval et al, 2000; Cuilliere-Dartigues et al, 2006; Tang et al, 2008). | |||
R-HSA-5246693 (Reactome) | In unstimulated cells, APC is K63 polyubiquitinated in a manner that depends on its association with AXIN. Although the precise timing of APC polyubiquitination is unclear, it is disrupted by abrogation of GSK3 kinase activity and in the presence of phosphodegron mutants of beta-catenin, suggesting that the formation of a functional destruction complex is required. Destruction complex formation is also dependent upon AXIN levels, which may be regulated at least in part by the balance of its ubiquitination and sumoylation (Kim et al, 2008). Upon WNT3A stimulation, APC K63 polyubiquitination is lost coincident with disruption of the APC-AXIN interaction (Tran and Polakis, 2012). Interestingly, another study has shown that DVL is K63 polyubiquitinated upon WNT signaling (Tauriello et al, 2010), suggesting a possible model in which WNT signaling promotes a change in AXIN-K63 polyubiquitin binding partner to destabilize the destruction complex and promote pathway activation. Alternately, APC K63 polyubiquitination may protect beta-catenin from PP2A-mediated dephosphorylation and thus favour its degradation (Su et al, 2008). | |||
R-HSA-5251555 (Reactome) | AXIN1 was first identified as the product of the mouse gene fused and has since been shown to have a key role in the degradation of beta-catenin by the destruction complex (Zeng et al, 1997; reviewed in Saito-Diaz et al, 2013). Deletion, missense and nonsense mutations that lead to activated WNT signaling have been identified in the AXIN1 gene in human cancers, making AXIN1 a tumor suppressor gene (reviewed in Salahshor and Woodgett, 2005). | |||
R-HSA-5251557 (Reactome) | AMER1 was identified as a gene mutated in a subset of Wilms tumors (Rivera et al, 2007) and the protein has been shown to be a component of the beta-catenin destruction complex (Major et al, 2007). | |||
R-HSA-5334050 (Reactome) | In addition to repressing WNT-dependent targets through Groucho/TLE proteins, some TCF/LEF transcription factors may also work by recruiting the CTBP1 and CTBP2 repressors (Duval et al, 2000). CTBP-binding regions are present in the 'E-form' splice variants of TCF7L2 and in TCF7L1 and in vitro interactions have been demonstrated in Xenopus and mammals, although the in vivo relevance of these interactions is unclear (Brannon et al, 1999; Valenta et al, 2003; Cuilliere-Dartigues et al, 2006; Tang et al, 2008; Hamada and Bienz, 2004). Abrogation of the interaction interface results in a loss of TCF-CTBP colocalization and increased expression of a TCF-dependent reporter gene (Cuilliere-Dartigues et al, 2006; Tang et al, 2008). | |||
RBX1:SKP1:CUL1:beta-TrCP1:phosphorylated beta-catenin complex | Arrow | R-HSA-2130279 (Reactome) | ||
RBX1:SKP1:CUL1:beta-TrCP1:phosphorylated beta-catenin complex | R-HSA-2130286 (Reactome) | |||
SCF beta-TrCP complex | Arrow | R-HSA-2130282 (Reactome) | ||
SCF beta-TrCP complex | R-HSA-2130279 (Reactome) | |||
TCF7L2/TCF7L1:CTBPs | Arrow | R-HSA-5334050 (Reactome) | ||
TCF7L2/TCF7L1:CTBPs | TBar | R-HSA-5229348 (Reactome) | ||
TCF7L2/TCF7L1 | R-HSA-5334050 (Reactome) | |||
TLE tetramer | Arrow | R-HSA-4641229 (Reactome) | ||
TLE tetramer | R-HSA-4641231 (Reactome) | |||
TLE:AES | Arrow | R-HSA-4649028 (Reactome) | ||
TLE:HDAC1 | Arrow | R-HSA-4641231 (Reactome) | ||
TLE:HDAC1 | TBar | R-HSA-5229348 (Reactome) | ||
TLE | R-HSA-4641229 (Reactome) | |||
TLE | R-HSA-4649028 (Reactome) | |||
Ub | Arrow | R-HSA-2130282 (Reactome) | ||
Ub | R-HSA-2130286 (Reactome) | |||
beta-catenin:p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | Arrow | R-HSA-195304 (Reactome) | ||
beta-catenin:p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | R-HSA-195318 (Reactome) | |||
beta-catenin:p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | mim-catalysis | R-HSA-195318 (Reactome) | ||
beta-catenin | R-HSA-195304 (Reactome) | |||
p-AXIN:CK1alpha:GSK3B:phospho-APC (20 aa repeat region):PP2A:AMER1 complex | Arrow | R-HSA-2130282 (Reactome) | ||
p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | Arrow | R-HSA-5229343 (Reactome) | ||
p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | R-HSA-195304 (Reactome) | |||
p-S33,S37,T41,S45-beta-catenin:p-AXIN:CK1alpha:GSK3B:phospho-ub-APC (20 aa repeat region):PP2A:AMER1 complex | Arrow | R-HSA-195275 (Reactome) | ||
p-S33,S37,T41,S45-beta-catenin:p-AXIN:CK1alpha:GSK3B:phospho-ub-APC (20 aa repeat region):PP2A:AMER1 complex | Arrow | R-HSA-195280 (Reactome) | ||
p-S33,S37,T41,S45-beta-catenin:p-AXIN:CK1alpha:GSK3B:phospho-ub-APC (20 aa repeat region):PP2A:AMER1 complex | R-HSA-195280 (Reactome) | |||
p-S33,S37,T41,S45-beta-catenin:p-AXIN:CK1alpha:GSK3B:phospho-ub-APC (20 aa repeat region):PP2A:AMER1 complex | R-HSA-2130279 (Reactome) | |||
p-S33,S37,T41,S45-beta-catenin:p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | Arrow | R-HSA-195300 (Reactome) | ||
p-S33,S37,T41,S45-beta-catenin:p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | R-HSA-195275 (Reactome) | |||
p-S33,S37,T41,S45-beta-catenin:p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | mim-catalysis | R-HSA-195275 (Reactome) | ||
p-S37,T41,S45-beta-catenin:p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | Arrow | R-HSA-195283 (Reactome) | ||
p-S37,T41,S45-beta-catenin:p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | R-HSA-195300 (Reactome) | |||
p-S37,T41,S45-beta-catenin:p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | mim-catalysis | R-HSA-195300 (Reactome) | ||
p-T41,S45-beta-catenin:p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | Arrow | R-HSA-195287 (Reactome) | ||
p-T41,S45-beta-catenin:p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | R-HSA-195283 (Reactome) | |||
p-T41,S45-beta-catenin:p-AXIN:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | mim-catalysis | R-HSA-195283 (Reactome) | ||
pS45-beta-catenin:p-Axin:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | Arrow | R-HSA-195318 (Reactome) | ||
pS45-beta-catenin:p-Axin:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | R-HSA-195287 (Reactome) | |||
pS45-beta-catenin:p-Axin:GSK3:CK1alpha:ub-APC:PP2A:AMER1 complex | mim-catalysis | R-HSA-195287 (Reactome) | ||
ubiquitinated phospho-beta-catenin:RBX1:SCF(beta-TrCP1) complex | Arrow | R-HSA-2130286 (Reactome) | ||
ubiquitinated phospho-beta-catenin:RBX1:SCF(beta-TrCP1) complex | R-HSA-2130282 (Reactome) | |||
unknown ligase | mim-catalysis | R-HSA-5246693 (Reactome) |