| 2000 |
AXIN1 mutations in hepatocellular carcinomas lead to increased nuclear beta-catenin/TCF DNA binding, and adenovirus-mediated transfer of wild-type AXIN1 induces apoptosis in HCC and colorectal cancer cells with activated beta-catenin signaling, establishing AXIN1 as a tumor suppressor that negatively regulates the Wnt/beta-catenin pathway. |
Adenoviral gene transfer, TCF/beta-catenin DNA binding assay, mutation sequencing |
Nature genetics |
High |
10700176
|
| 2001 |
A missense mutation in the GSK3-binding domain of zebrafish Axin1 (masterblind allele) abolishes Axin1 binding to Gsk3 and disrupts Tcf-dependent transcription, demonstrating that Axin1-GSK3 interaction is required for anterior neural patterning; overexpression of wild-type Axin1 or Gsk3beta rescues the phenotype. |
Genetic epistasis (zebrafish mutant), overexpression rescue, Tcf reporter assay |
Genes & development |
High |
11390362
|
| 2009 |
Axin1 acts as a scaffold protein to promote formation of a c-Myc degradation complex containing GSK3beta, Pin1, and PP2A-B56alpha; Axin1 knockdown decreases association of c-Myc with these proteins, reduces T58 phosphorylation, enhances S62 phosphorylation, and increases c-Myc stability, while acute Axin1 expression reduces c-Myc levels and suppresses its transcriptional activity. |
Co-immunoprecipitation, siRNA knockdown, phosphorylation analysis, c-Myc stability assay |
The EMBO journal |
High |
19131971
|
| 2012 |
Beta-catenin is phosphorylated, ubiquitinated, and degraded by the proteasome all within an intact Axin1 complex; Wnt signaling suppresses beta-catenin ubiquitination within the complex without causing complex disassembly or inhibiting phosphorylation, leading to complex saturation by phospho-beta-catenin and allowing newly synthesized free beta-catenin to accumulate. |
Quantitative mass spectrometry under endogenous conditions, immunoprecipitation, proteasome inhibitor assays in multiple cell types |
Cell |
High |
22682247
|
| 2010 |
The central scaffolding region of Axin1 implicated in binding GSK3beta and beta-catenin is natively unfolded (intrinsically disordered), suggesting that this unfolded nature facilitates dynamic interactions that position the kinase GSK3beta to phosphorylate its substrate beta-catenin. |
Biochemical and biophysical characterization (NMR, CD spectroscopy, size-exclusion chromatography) |
Journal of molecular biology |
High |
21087614
|
| 2011 |
Axin1 scaffold protein promotes Myc protein instability in breast cancer: decreased AXIN1 expression and altered splice variant ratio in breast cancer correlates with increased Myc stability, elevated S62 phosphorylation, and decreased T58 phosphorylation, establishing Axin1 as a coordinator of the Myc degradation complex. |
Splice variant analysis, protein stability assay, phospho-specific immunoblotting, breast cancer cell lines and primary tumors |
PNAS |
Medium |
21808024
|
| 2012 |
Axin1 (but not Axin2) plays an essential role in host defense against Salmonella; pathogenic Salmonella reduces Axin1 levels post-translationally through ubiquitination and SUMOylation requiring the DIX domain and Ser614 of Axin1, and Axin1 prevents bacterial invasiveness and inflammatory response in intestinal epithelial cells. |
Loss-of-function (knockdown), domain mapping (DIX domain and Ser614 mutants), ubiquitination and SUMOylation assays |
PloS one |
Medium |
22509369
|
| 2014 |
Axin1 physically associates with NRF2 (via the central region of Axin1 and Neh4/Neh5 domains of NRF2) in a WNT-3A-regulated complex; Axin1 knockdown increases NRF2 protein levels, Axin1 stabilization (tankyrase inhibition) blocks WNT/NRF2 signaling, and liver-specific conditional Axin1 knockout mice show upregulation of the NRF2 transcriptional signature, revealing a non-canonical WNT-Axin1-NRF2 axis regulating hepatic antioxidant metabolism. |
Co-immunoprecipitation, domain mapping, siRNA knockdown, tankyrase inhibition, conditional liver-specific KO mice |
Antioxidants & redox signaling |
High |
25336178
|
| 2016 |
RUNX1 and estrogen receptor (ER) occupy adjacent elements in the AXIN1 second intron, and RUNX1 antagonizes oestrogen-mediated AXIN1 transcriptional suppression; loss of RUNX1 in ER+ mammary epithelial cells decreases AXIN1, increases beta-catenin, deregulates mitosis, and stimulates proliferation, effects rescued by AXIN1 stabilization. |
ChIP assay, RNA-seq, in vivo conditional KO, AXIN1 stabilization rescue experiments |
Nature communications |
High |
26916619
|
| 2016 |
The gamma-Protocadherin-C3 (γ-Pcdh-C3) isoform physically interacts with Axin1 via its unique variable cytoplasmic domain (VCD); the C3 VCD competes with Dishevelled for binding to the DIX domain of Axin1, stabilizing Axin1 at the membrane, reducing phosphorylation of Wnt co-receptor Lrp6, and inhibiting canonical Wnt signaling. |
Co-immunoprecipitation, competition binding assay (VCD vs. Dvl for DIX domain), conditional transgenic in vivo |
Scientific reports |
High |
27530555
|
| 2016 |
Axin-1 localizes around the meiotic spindle in mouse oocytes; siRNA-mediated knockdown of Axin1 causes defective spindles, misaligned chromosomes, failure of first polar body extrusion, impaired gamma-tubulin/Nek9 spindle pole localization, and retained BubR1 at kinetochores, establishing Axin1 as critical for spindle organization and meiotic cell cycle progression. |
Immunofluorescence localization, siRNA knockdown with defined phenotypic readout in mouse oocytes |
PloS one |
Medium |
27284927
|
| 2016 |
Vitamin D receptor (VDR) is a transcriptional regulator of AXIN1: VDR binds a genomic regulatory region of the AXIN1 gene (ChIP-confirmed), and VDR deletion reduces cytosolic Axin1 protein and mRNA levels without a change in Axin1 nuclear fraction; Axin1 knockdown does not reciprocally affect VDR, establishing unidirectional transcriptional control. |
ChIP assay, conditional VDR KO mouse (VDRΔIEC), subcellular fractionation, RT-PCR and Western blot |
The Journal of steroid biochemistry and molecular biology |
High |
27601169
|
| 2017 |
TRIM65 E3 ubiquitin ligase directly binds Axin1 and promotes its ubiquitination and proteasomal degradation, thereby activating beta-catenin signaling; TRIM65 overexpression reduces Axin1 protein and promotes HCC cell growth and metastasis, while knockdown has opposite effects. |
Co-immunoprecipitation, ubiquitination assay, overexpression/knockdown with functional readouts in vitro and in vivo |
Journal of cell science |
Medium |
28754688
|
| 2018 |
C9orf140, identified by tandem-affinity purification/mass spectrometry as an Axin1-interacting protein, outcompetes PP2A for binding to Axin1, shifts the balance between phosphorylation and dephosphorylation of beta-catenin, and mediates a negative feedback loop of Wnt/beta-catenin signaling; C9orf140 is induced by Wnt/beta-catenin. |
Tandem-affinity purification/mass spectrometry, Co-IP, competition binding assay, zebrafish embryo epistasis |
Oncogene |
Medium |
29531269
|
| 2018 |
Peptide microarray mapping of AXIN1 identified at least three binding epitopes in the central intrinsically disordered region (IDR) for each of CK1ε, c-Myc, Pin1, and p53; functionally validated AXIN1-CK1ε epitopes with peptide mimics and deletion variants; proposed model in which AXIN1 competes with Dishevelled for CK1ε binding to regulate CK1ε-induced DVL phosphorylation and Wnt/beta-catenin signaling. |
Peptide microarray, epitope-mimicking peptides, AXIN1 deletion variants, functional Wnt assay |
The Journal of biological chemistry |
Medium |
30166345
|
| 2019 |
Axin1 deletion cooperates with c-Met to induce HCC in mice in a beta-catenin-dependent but Notch-independent manner; silencing beta-catenin in AXIN1-null HCC cells strongly inhibited proliferation, while blocking Notch via dominant-negative RBP-J or Notch2 ablation did not affect hepatocarcinogenesis, establishing the genetic epistasis of Axin1-loss-driven HCC. |
CRISPR/Cas9 Axin1 deletion, liver-specific Ctnnb1 KO epistasis, dominant-negative Notch2 ablation, mouse HCC model |
Hepatology |
High |
30737831
|
| 2019 |
Axin1 forms a complex with AMPK in contracting skeletal muscle (reciprocal co-IP confirmed); contraction/exercise upregulates Axin1 protein in an AMPK-dependent manner, and siRNA knockdown of either AMPK or Axin1 blocks contraction-induced GTP loading of Rac1, PAK phosphorylation, and glucose uptake, placing Axin1 in an AMPK/Axin1-Rac1 signaling axis for contraction-stimulated muscle glucose uptake. |
Reciprocal co-immunoprecipitation, siRNA knockdown, Rac1-GTP loading assay, glucose uptake assay in C2C12 myotubes and mouse exercise model |
American journal of physiology. Endocrinology and metabolism |
Medium |
31846370
|
| 2020 |
USP44 deubiquitinase directly interacts with Axin1, reduces its ubiquitination level (without affecting mRNA), stabilizes Axin1 protein, and thereby suppresses Wnt/beta-catenin signaling; Axin1 knockdown abolishes USP44-mediated effects on CRC cell proliferation and apoptosis. |
Co-immunoprecipitation, ubiquitination assay, mRNA vs. protein analysis, functional rescue with Axin1 KD |
Cell biology international |
Medium |
32285989
|
| 2019 |
Axin-1 binds Caveolin-1 via its C-terminal region (710-797 aa) interacting with the N-terminal region (1-100 aa) of Caveolin-1; disrupting this interaction by CRISPR/Cas9 increases inflammatory cytokine production (TNF-α, IL-6) and reduces beta-catenin expression in LPS-challenged alveolar type I epithelial cells. |
Yeast two-hybrid, co-immunoprecipitation with domain mapping, CRISPR/Cas9 disruption of interaction, cytokine ELISA |
Biochemical and biophysical research communications |
Medium |
30954225
|
| 2021 |
YTHDF2, an m6A reader, directly binds AXIN1 mRNA and promotes its decay, thereby activating Wnt/beta-catenin signaling; AXIN1 knockout rescues the inhibitory effects of YTHDF2 depletion on lung cancer cell proliferation, colony-formation, and migration. |
RNA-seq, m6A-seq, CLIP-seq, RIP-seq integration, mRNA decay assay, genetic rescue (AXIN1 KO) |
Cell death & disease |
High |
33980824
|
| 2021 |
CircAXIN1 encodes a novel 295-aa protein (AXIN1-295aa) that competitively interacts with APC, disrupting the beta-catenin destruction complex and causing beta-catenin nuclear translocation and TCF-driven transcription; immunoprecipitation confirmed AXIN1-295aa/APC competitive interaction. |
FLAG-tagged overexpression, immunoblotting, mass spectrometry, luciferase reporter, immunoprecipitation competition assay, ChIP, in vitro and in vivo functional assays |
Molecular cancer |
Medium |
34863211
|
| 2022 |
AXIN1 binds to YAP/TAZ in human HCC cells and regulates their stability; loss of AXIN1 strongly induces nuclear YAP/TAZ, and co-deletion of Yap and Taz significantly inhibits c-Met/sgAxin1-driven HCC development in mice, establishing YAP/TAZ as major effectors downstream of AXIN1-loss in hepatocarcinogenesis. |
Co-immunoprecipitation, conditional KO epistasis (Yap/Taz KO in Axin1-deleted liver tumors), TTR-CreERT2 KO during tumor progression |
Hepatology |
High |
35921500
|
| 2022 |
SIRT4 translocates from mitochondria to the cytoplasm upon Wnt stimulation and deacetylates Axin1 at Lys147 (within the RGS domain); the Axin1-K147R mutant impairs assembly of beta-TrCP into the destruction complex, leading to beta-catenin accumulation even without Wnt stimulation, revealing acetylation as a regulatory PTM of Axin1 activity. |
SIRT4 translocation imaging, in vitro deacetylation assay, Axin1-K147R mutagenesis, beta-TrCP Co-IP, beta-catenin accumulation assay |
Frontiers in oncology |
Medium |
35707358
|
| 2022 |
UCHL5 deubiquitinase physically interacts with multiple domains of Axin1 and is required for both stabilization and polymerization of Axin1 proteins; these effects are mediated through the DIX domain of Axin1 but do not require UCHL5 deubiquitinating enzymatic activity, identifying a non-catalytic mechanism by which UCHL5 potentiates Axin1 function in the beta-catenin destruction complex. |
Co-immunoprecipitation, Axin1 polymerization assay, catalytically-dead UCHL5 mutant, siRNA knockdown with Wnt reporter |
Scientific reports |
Medium |
35256667
|
| 2023 |
γ-Pcdh-C3 interacts with Axin1 in the cortex in vivo; mice lacking γC3 exhibit disrupted Axin1 localization to synaptic fractions and severely decreased dendritic complexity of cortical pyramidal neurons; rescue experiments in γC3-KO neurons confirm γC3 promotes dendritic arborization through an Axin1-dependent mechanism mediated via its variable cytoplasmic domain. |
CRISPR/Cas9 KO mouse, subcellular fractionation, dendritic morphology analysis, cultured neuron rescue with domain mutants |
The Journal of neuroscience |
High |
36604170
|
| 2024 |
Analysis of 80 tumor-associated AXIN1 missense variants in the GSK3beta, beta-catenin, and RGS/APC interaction domains identified 18 that significantly affect beta-catenin signaling; co-immunoprecipitation showed most lost binding to the partner corresponding to the mutated domain; truncating mutations inversely correlated with beta-catenin regulatory function by protein length. |
Systematic beta-catenin signaling reporter assay, co-immunoprecipitation of 80 variants, protein structure analysis |
Cancer research |
High |
38359148
|
| 2024 |
AXIN1 maintains stability of IRF3 by preventing p62-mediated autophagic degradation: AXIN1 recruits USP35 to remove K48-linked ubiquitination at IRF3 K366. Upon virus infection, phosphorylated TBK1 triggers AXIN1 phase separation, leading to increased IRF3 phosphorylation and enhanced type I IFN production. |
Co-immunoprecipitation, ubiquitination assay (K48-specific), phase separation imaging, TBK1 phosphorylation assay, USP35 recruitment assay, small molecule (KYA1797K) functional validation |
Signal transduction and targeted therapy |
High |
39384753
|
| 2024 |
Lactylation of Axin1 at K147 induced by hypoxia promotes ubiquitination and proteasomal degradation of Axin1, leading to enhanced glycolysis and cell stemness; Axin1 K147 mutant (non-lactylatable) resists degradation and inhibits glycolysis even under hypoxia, while wild-type Axin1 overexpression suppresses tumor growth in vivo. |
Mass spectrometry-identified lactylation site, K147 mutagenesis, ubiquitination assay, ECAR/glycolysis assay, in vivo tumor xenograft |
Biochemical pharmacology |
Medium |
38972426
|
| 2012 |
Conditional disruption of Axin1 in adult mouse liver results in acute hepatocyte proliferation, activation of Wnt target genes (Axin2, c-Myc, cyclin D1) and G2/M transition genes, without nuclear beta-catenin accumulation or changes in liver zonation characteristic of APC loss, and development of HCC in 5 of 9 mice after 1 year. |
Conditional Cre/loxP Axin1 KO mouse, qRT-PCR, immunoprecipitation, histology |
Gastroenterology |
High |
22960659
|
| 2010 |
MAP3K1 interacts with Axin1 as an endogenous binding partner identified by immunoprecipitation-coupled proteomics; the Axin1-MAP3K1 interaction is induced and modulated by Wnt stimulation; MAP3K1 E3 ubiquitin ligase activity (not kinase activity) is required for TCF/LEF-driven Wnt target gene expression. |
Immunoprecipitation-coupled proteomics (MS), siRNA depletion, ubiquitin ligase and kinase mutant functional analysis |
Biological chemistry |
Medium |
20128690
|
| 2017 |
Hsp90α/β associates with the GSK3β/Axin1/phospho-β-catenin complex in MCF-7 breast cancer cells; selective Hsp90 inhibition disrupts this complex, confirming Hsp90 modulates beta-catenin phosphorylation by participating in the destruction complex. |
Immunoprecipitation, confocal microscopy, selective Hsp90 inhibition |
Biochemical and biophysical research communications |
Low |
21925151
|
| 2018 |
TRIM11 E3 ubiquitin ligase interacts with Axin1 (Co-IP confirmed) and promotes Axin1 ubiquitination and degradation, thereby activating beta-catenin signaling to promote lymphoma cell proliferation. |
Co-immunoprecipitation, ubiquitination detection assay, TRIM11 KD/OE functional assays |
Experimental cell research |
Medium |
31786079
|
| 2020 |
RBM47 RNA-binding protein binds AXIN1 mRNA and stabilizes it, thereby suppressing Wnt/beta-catenin signaling and inhibiting NSCLC cell proliferation, migration, and invasion. |
RIP (RNA immunoprecipitation), mRNA stability assay, lentiviral KD, in vivo xenograft |
Surgical oncology |
Medium |
32891348
|