Table 1 Nuclear β-catenin-binding partners

From: Tumour–stroma interactions in colorectal cancer: converging on β-catenin activation and cancer stemness

Protein

Interaction and biological significance

Reference

14-3-3-z

Binds β-catenin and stabilises it, Akt dependent

Tian et al (2004)

Akt

Phosphorylates β-catenin at S552 and increases cytoplasmic pool, increases binding to 14-3-3, increases transcriptional activity

Fang et al (2007)

AR (androgen receptor)

Binds β-catenin, augments AR activity, inhibits TCF-dependent transcription

Yang et al (2002)

AP1 and Smad3/4

Complex with β-catenin and TCF/Lef1 to activate gastrin target gene

Chakladar et al (2005)

BCL9 (Legless)

Binds β-catenin and TCF/LEF1, increases transcription, Pygopus dependent

Kramps et al (2002)

B9L/BCL9-2 (BCL9-like protein)

Binds β-catenin, increases transcription, induces EMT

Adachi et al (2004); Brembeck et al (2004)

Brg-1 (chromatin remodelling factor)

Binds β-catenin, increases transcription

Barker et al (2001)

c-Jun (phosphorylated)

Binds β-catenin and TCF/LEF1 in a JNK- and β-catenin-dependent manner, knockout decreases tumour multiplcity in Apcmin animals

Nateri et al (2005); Toualbi et al (2007)

c-Fos

Binds β-catenin, increases transcription

Toualbi et al (2007)

CARM1 (coactivator-associated arginine methyltransferase)

Binds β-catenin, increases transcription

Koh et al (2002)

CBP (CREB-binding protein)

Binds β-catenin

Takemaru and Moon (2000)

cdx1 and cdx2 (homeodomain transcription factors)

Decreases β-catenin Tyr phosphorylation, decreases transcription, induces E-cadherin adhesion

Guo et al (2004); Ezaki et al (2007)

Chibby (nuclear protein)

Binds β-catenin, inhibits transcription

Takemaru et al (2003)

CREB (cyclic AMP response element binding protein)

Binds β-catenin, induces expression of WISP-1 (Wnt-1-induced secreted protein 1)

Xu et al (2000)

cul4B (Cullin4B/E3-ubiquitin ligase)

Binds β-catenin and induces its proteolytic degradation

Tripathi et al (2007)

Duplin (axis duplication inhibitor)

Binds β-catenin in nucleus and inhibits transcription

Sakamoto et al (2000)

EBP50 (PDZ-containing protein)

Binds β-catenin, increases transcription

Shibata et al (2003)

emerin (type II inner nuclear membrane protein)

Binds β-catenin resulting in its cytoplasmic retention and decreased transcriptional activity

Markiewicz et al (2006)

ERα (estrogen receptor)

Binds β-catenin, increases transcription

Kouzmenko et al (2004)

ezh2 (enhancer of zeste homolog 2, polycomb group protein)

Binds β-catenin and ERα

Shi et al (2007)

FHL2 (four and a half of LIM-only protein 2, LIM coactivator)

Binds β-catenin, increases transcription

Wei et al (2003); Martin et al (2002)

FOXO (insulin- and oxidative stress signaling-induced transcription factor)

Binds β-catenin resulting in increased FOXO target gene transcription

Essers et al (2005)

FUS (fusion/translocated in liposarcoma, TLS)

Binds and increases β-catenin, regulates pre-mRNA splicing

Sato et al (2005)

GRIP1 (p160 coactivator of AR)

Binds β-catenin, augments AR activity

Li et al (2004)

Groucho/TLE (transcriptional repressor)

Binds β-catenin and is subsequently displaced from TCF/LEF1

Daniels and Weis (2005)

HIF1α (hypoxia inducible factor)

Binds β-catenin, competes with TCF/LEF1, induces survival and cellular adaptation to hypoxia

Kaidi et al (2007)

hARD1 (human arrest defective 1, acetyltransferase)

Binds and acetylates β-catenin, increases transcription

Lim et al (2006)

I-mfa (inhibitor of MyoD Family a)

Binds β-catenin, relieving I-mfa-mediated gene repression

Pan et al (2005)

ICAT (inhibitor of β-catenin and TCF-4)

Binds β-catenin, represses transcription

Tago et al (2000)

IKKα (IκB kinase α)

Binds β-catenin, inhibits its ubiquitination, increases transcription

Lamberti et al (2001)

IKKβ (IκB kinase β)

Binds β-catenin, inhibits transcription

Lamberti et al (2001)

LRH-1 (orphan nuclear receptor)

Binds β-catenin, induces proliferation

Botrugno et al (2004)

LZTS2 (leucine zipper tumor suppressor 2)

Binds β-catenin, inhibits transcription

Thyssen et al (2006)

Mediator (MED12 subunit)

Binds β-catenin, increases transcription

Kim et al (2006)

Mitf (microphthalmia-associated transcription factor)

Binds β-catenin and competes with TCF/LEF1 to activate mitf target genes, important for melanocyte development

Schepsky et al (2006)

NFκB, p50 subunit

Binds β-catenin, decreases NFκB DNA binding, transactivation activity, regulates TNFα-induced CRP (C-reactive protein, acute-phase response protein) expression

Deng et al (2002); Sun et al (2005); Choi et al (2007)

Nurr1 (orphan nuclear receptor)

Binds β-catenin, increases transcription

Kitagawa et al (2007)

oct3/4

Binds β-catenin in ES cells, upregulates Nanog

Takao et al (2007)

p68 (DEAD box family of RNA helicases)

Binds β-catenin upon PDGF-induced Tyr phosphorylation of p68, increases transcription and EMT

Yang et al (2006)

p300

Binds and acetylates β-catenin, increases transcription

Sun et al (2000); Hecht et al (2000)

Parafibromin (component of polymerase-associated factor 1 (PAF1) complex)

Binds β-catenin, increases transcription, Pogypus dependent

Mosimann et al (2006)

Pin1 (prolyl isomerase)

Binds β-catenin, displaces it from APC, stabilises it and induces transcription, overexpressed in human tumours

Ryo et al (2001)

Pitx2 (bicoid-related transcription factor)

Induced by Wnt/Dvl/β-catenin, increases transcription

Kioussi et al (2002)

Pontin52 (nuclear protein)

Binds β-catenin

Bauer et al (1998)

PPARγ (peroxisome proliferator-activated receptor)

Binds β-catenin, decreases membrane bound and cytoplasmic fraction

Sharma et al (2004); Liu et al (2004)

PRA1 (Prenylated Rab acceptor 1)

Binds β-catenin, inhibits transcription

Kim et al (2006)

prop1 (Prophet of Pit1, homeodomain factor)

Binds β-catenin, activates expression of lineage-determining transcription factor Pit1, represses the lineage-inhibiting transcription factor Hesx1 via TLE/Reptin/HDAC1 corepressor complexes

Olson et al (2006)

Pygopus

Complexes with β-catenin and TCF/LEF1 in a Legless-dependent manner

Kramps et al (2002); Thompson et al (2002)

RanBP3 (Ran binding protein 3)

Cofactor of chromosome region maintenance 1 (CRM1)-mediated nuclear export binds β-catenin in a RanGTP-stimulated manner, inhibits transcriptional activity

Hendriksen et al (2005)

RAR (retinoid acid receptor)

Binds β-catenin in retinoid-dependent manner, competes for binding with TCF/LEF1

Easwaran et al (1999)

Reptin52 (homologue of pontin52)

Binds β-catenin and Pontin52, inhibits transcription

Bauer et al (2000)

RXRα (retinoid X receptor)

Binds β-catenin, targets it for proteolytic degradation

Xiao et al (2003)

SHP-1 (protein-tyrosine phosphatase)

Binds β-catenin and inhibits transcription in intestinal epithelial cells

Duchesne et al (2003)

Smad1

Complexes with β-catenin and TCF/LEF1 resulting in increased myc expression

Hu and Rosenblum (2005)

Smad3

Binds β-catenin and TCF/LEF1

Labbe et al (2000); Jian et al (2006)

Smad4

Interacts with TCF/LEF1 (strong) and β-catenin (weak), coregulates TGFβ/Wnt common target genes

Nishita et al (2000)

Smad7

Binds β-catenin, important for TGFβ-induced apoptosis and targets β-catenin for proteolytic degradation

Edlund et al (2005); Han et al (2006)

Sox4

Binds and stabilises β-catenin and TCF/LEF1

Sinner et al (2007)

Sox9

Binds β-catenin and targets it for degradation

Akiyama et al (2004)

Sox17

Binds β-catenin and TCF/LEF1, targets its for proteolytic degradation

Sinner et al (2007)

TAK1 (MAPKKK) and NLK (Nemo-like kinase)

Interact with and phosphorylate TCF/LEF1 and β-catenin, inhibit DNA binding capacity and transcription

Ishitani et al (1999)

Teashirt (zinc finger protein)

Binds to armidillo (Drosophila homologue of β-catenin), activated by Wingless

Gallet et al (1998)

TCFs

Bind β-catenin

Molenaar et al (1996)

TIF2/GRIP1 (transcriptional intermediary factor-2/glucocorticoid receptor interacting protein-1)

Binds β-catenin and increases binding affinity to AR

Song and Gelmann (2005)

TOPO IIα (DNA topoisomerase IIα)

Binds β-catenin, increases transcription

Sato et al (2005); Huang et al (2007)

VDR (vitamin D receptor)

Binds β-catenin in a vitamin D-dependent manner, competes for binding with TCF/LEF1

Pálmer et al (2001)

XSox17α/β and Xsox3

Bind β-catenin and inhibit transcription

Zorn et al (1999)

  1. EMT=epithelial-to-mesenchymal transition; FOXO=Forkhead box O; PDGF=platelet-derived growth factor; TGFβ=transforming growth factor-β. Proteins previously shown to directly bind to β-catenin in the nucleus are listed in alphabetical order together with a brief description and corresponding literature references. Please note that the list is admittedly incomplete as only direct binding partners have been included. Many other proteins have been excluded that do not directly bind to β-catenin but participate to its many complexes and may yet significantly affect its function.