| 2002 |
DACT1 (Dapper) was isolated as a Dishevelled-interacting protein; it colocalizes with Dishevelled intracellularly and forms a complex with Axin, GSK-3, CKI, and β-catenin. Overexpression increases Axin and GSK-3 in this complex, decreasing soluble β-catenin and reducing β-catenin-responsive gene activation. DACT1 also inhibits Dishevelled-mediated activation of JNK, demonstrating it acts as a general Dishevelled antagonist. |
Co-immunoprecipitation, reporter assays, Xenopus overexpression/depletion, colocalization |
Developmental cell |
High |
11970895
|
| 2002 |
Frodo (DACT1 ortholog in Xenopus) binds Dishevelled and synergizes with XDsh in secondary axis induction; dominant-negative Frodo and antisense depletion inhibit axial development in response to XDsh and XWnt8 and suppress TCF-reporter activation, establishing Frodo as an essential positive regulator of Wnt signaling in certain developmental contexts. |
Xenopus overexpression, dominant-negative constructs, antisense oligonucleotide depletion, TCF reporter assay, Co-IP |
Nature cell biology |
High |
11941372
|
| 2004 |
The conserved N-terminal domain of Frodo (DACT1) associates with TCF3, while the C-terminus binds Dishevelled. Frodo and Dapper are required cell-autonomously for neural tissue formation and organizer gene expression in a β-catenin-independent manner, linking Dsh and TCF to regulate Wnt target genes in a parallel pathway. |
Co-IP (TCF3 binding), morpholino knockdown, in vivo reporter assays, epistasis analysis in Xenopus |
Development (Cambridge, England) |
Medium |
15329348
|
| 2006 |
Human DACT1 (Dpr1) inhibits Wnt signaling by promoting lysosomal (not proteasomal) degradation of Dishevelled. The interaction interface is formed between the DEP domain of Dvl and the central/C-terminal regions of Dpr1. The C-terminal 225 amino acids act as a dominant negative. Knockdown of Dpr1 upregulates endogenous Dvl2 protein. |
Co-IP with domain mapping, lysosome/proteasome inhibitor assays, siRNA knockdown, Western blot |
The Journal of biological chemistry |
High |
16446366
|
| 2006 |
Frodo (DACT1 ortholog) binds p120-catenin and mediates Wnt-induced stabilization of p120-catenin, which in turn promotes nuclear sequestration of the transcriptional repressor Kaiso. Dsh and Frodo act as upstream regulators of the p120-catenin/Kaiso signaling pathway. |
Co-IP, Xenopus embryo assays, dominant-negative constructs, reporter assays |
Developmental cell |
Medium |
17084360
|
| 2008 |
Dpr1 is a nucleocytoplasmic shuttling protein. Endogenous Dpr1 localizes throughout the cell; Wnt1 induces its nuclear export. Leptomycin B causes nuclear accumulation. Nuclear Dpr1 antagonizes Wnt signaling by interacting with β-catenin and LEF1, disrupting their complex, and associating with HDAC1 to enhance the LEF1-HDAC1 repressive interaction. NLS and NES sequences were identified within Dpr1. |
Subcellular fractionation, leptomycin B treatment, Co-IP, reporter assays, zebrafish embryo assays, domain mapping |
The Journal of biological chemistry |
High |
18936100
|
| 2008 |
Dact1 regulates adipogenesis by coordinating the Wnt/β-catenin signaling network. Dact1 knockdown impairs adipogenesis through activation of Wnt/β-catenin signaling; this is reversed by secreted Frizzled-related protein 1 (Sfrp1). Dact1 overexpression promotes adipogenesis and confers resistance to Wnt ligand-induced anti-adipogenesis through increased Sfrp expression and reduced Wnt expression. |
siRNA knockdown, overexpression, adipogenesis differentiation assays, Wnt reporter assays, in vivo mouse models |
Diabetes |
Medium |
19073771
|
| 2009 |
Dact1 forms a protein complex with Vangl2 (a PCP transmembrane component). In Dact1 mutant mice, Vangl2 is increased at the primitive streak, associated with abnormal E-cadherin distribution and altered PCP biochemistry. Heterozygous Vangl2 mutation rescues recessive Dact1 phenotypes, and loss of Dact1 rescues semidominant Vangl2 phenotypes, establishing Dact1 as an upstream regulator of Vangl2 in the PCP pathway. |
Co-immunoprecipitation, genetic epistasis (double mutant rescue), immunofluorescence, Western blot in mouse knockout |
Nature genetics |
High |
19701191
|
| 2010 |
Dact1 loss in mice causes deregulation of PCP signaling (altered Rho GTPase and JNK activity) with the canonical Wnt/β-catenin pathway largely unaffected. Dvl protein levels and cellular distribution are altered in the primitive streak of Dact1 knockout embryos, with increased Dvl2 accumulating in cortical cell regions, indicating Dact1 controls PCP by regulating Dvl protein level and localization. |
Dact1 knockout mice, PCP reporter assays, Rho/JNK activity assays, immunofluorescence, Western blot |
The Journal of biological chemistry |
High |
20145239
|
| 2010 |
Dact1 localizes to postsynaptic fractions in forebrain neurons. Dact1 knockout neurons have simpler dendritic arbors, fewer spines, reduced excitatory synapses and miniature EPSCs (inhibitory synapses unaffected). Loss of Dact1 decreases activated Rac. Recombinant Dact1 or constitutively active Rac1 (but not Rho or Cdc42) rescues dendrite and spine phenotypes, placing Dact1 upstream of Rac in a pathway for dendritic development. |
Subcellular fractionation, KO mouse neurons, electrophysiology (mEPSC), GTPase activity assays, rescue with constitutively active Rac1 |
The Journal of neuroscience |
High |
20335472
|
| 2011 |
All three Dact paralogs form complexes with Vangl, Dvl, and CK1δ/ε proteins across species. Dact proteins dimerize and heterodimerize through their conserved N-terminal leucine-zipper domains. Weaker, paralog-specific interactions were detected with catenin superfamily members including p120-catenin. Interactions with GSK3, LEF/TCF, HDAC1, and TGFβ receptors were paralog-specific, weak, or condition-sensitive. |
Systematic co-immunoprecipitation in HEK293 cells, domain deletion mapping |
BMC biochemistry |
Medium |
21718540
|
| 2011 |
14-3-3β interacts with human Dpr1, and this interaction is dependent on PKA-mediated phosphorylation of Dpr1 at Ser-237 and Ser-827. 14-3-3β binding attenuates Dpr1's ability to promote Dvl degradation, thereby enhancing Wnt signaling. PKA-mediated Dpr1 phosphorylation correlates with growth and tumor formation of colon cancer cells. |
Co-IP, phosphorylation site mutagenesis, PKA inhibitor/activator assays, Western blot for Dvl levels, colony formation assay |
The Journal of biological chemistry |
High |
21262972
|
| 2012 |
DACT1 missense mutations N356K and R45W (identified in human NTD patients) show loss-of-function or reduced activity in inducing Dvl2 degradation and inhibiting JNK phosphorylation, linking specific DACT1 molecular activities to human neural tube defect risk. |
Biochemical assays of DVL2 degradation, JNK phosphorylation assay with mutant constructs |
Human mutation |
Medium |
22610794
|
| 2013 |
Sestd1 is a novel binding partner of both Vangl2 and Dact1, with the Sestd1-Dact1 interface formed by the C-terminal region of Sestd1 and the N-terminal region of Dact1. Loss of Sestd1 precisely phenocopies loss of Dact1, and both show reciprocal genetic rescue interactions with Vangl2 mutation. Dact1 and Sestd1 interaction can induce Rho GTPase activation in cell-based assays. |
Co-immunoprecipitation with domain mapping, Sestd1 knockout mouse with phenotypic analysis, genetic epistasis with Vangl2, Rho GTPase activation assay |
The Journal of biological chemistry |
High |
23696638
|
| 2013 |
Dact1 is required cell-autonomously for excitatory synapse formation on cortical interneuron dendrites. Synapse numbers in Dact1-deficient interneurons are rescued by virally-mediated re-expression of Dact1, expression of the binding partner Dishevelled-1, and partially by DISC1, establishing Dact1 functions in cooperation with Dvl1 at postsynaptic sites. |
Conditional KO (Dlx-I12b enhancer-Cre), viral rescue, synapse counting, immunostaining |
PloS one |
Medium |
23826333
|
| 2013 |
Dapper1 promotes tumor suppression in gastric cancer by inhibiting NF-κB activation and its downstream factors (Bcl-2, Bcl-X, IL-8, TNF-α), in addition to its known Wnt antagonism, establishing a Wnt-independent tumor suppressor mechanism. |
Stable transfection, colony formation, apoptosis assay, NF-κB reporter assay, cytokine protein measurement, xenograft model |
Molecular medicine (Cambridge, Mass.) |
Medium |
23073659
|
| 2014 |
Dpr1 directly interacts with Beclin1 and Atg14L, enhances the Beclin1-Vps34 interaction, and increases Vps34 lipid kinase activity, promoting autophagosome formation. Dpr1 ablation in the CNS results in motor coordination defects and accumulation of p62 and ubiquitinated proteins. |
Co-IP, Vps34 kinase activity assay, LC3/Atg14L/DFCP1 puncta formation assay, conditional KO mouse phenotype, Western blot for LC3 lipidation and p62 |
Cell research |
High |
24980960
|
| 2014 |
Dpr1 is essential for Wnt5a-induced cardiomyocyte hypertrophy via the non-canonical Wnt/PCP pathway. Dpr1 depletion inhibits JNK phosphorylation downstream of non-canonical Wnt and causes increased Vangl2 protein levels with Vangl2 enrichment in perinuclear vesicles, indicating Dpr1 regulates the Vangl2/JNK axis. |
siRNA knockdown in cardiomyocytes, JNK phosphorylation assay, cell surface area measurement, Western blot for Vangl2, immunofluorescence |
FEBS letters |
Medium |
24879894
|
| 2015 |
Dpr1 promotes pVHL-mediated ubiquitination of Dvl2 and its subsequent autophagic degradation. Dpr1 knockdown decreases Dvl2-pVHL interaction and Dvl2 ubiquitination. The autophagic degradation of Dvl2 by Dpr1 requires Dvl2 aggregation. Protein aggregates (Dvl2, p62, Htt103Q) stimulate autophagy initiation (Beclin1-Vps34 interaction, Atg14L puncta) in a Dpr1-dependent manner. |
Co-IP, ubiquitination assay, autophagy inhibitor assays, Atg14L/Beclin1 interaction Co-IP, siRNA knockdown |
The Journal of biological chemistry |
Medium |
25825496
|
| 2015 |
MIZ1 interacts with Dpr1 and attenuates Dpr1's ability to induce Dvl2 degradation. Upon Wnt3a stimulation or Dpr1/Dvl2 overexpression, MIZ1 translocates from nucleus to cytoplasm, disrupting the Dpr1-Dvl2 interaction, thereby enhancing Wnt signaling. |
Co-IP, subcellular fractionation, Western blot for Dvl2 levels, cell proliferation assay |
The Biochemical journal |
Medium |
25558878
|
| 2016 |
Dact1 and Dact2 are required for neural crest cell delamination (EMT) in Xenopus and chick. They inhibit Wnt/β-catenin signaling upstream of TCF transcriptional activity, and regulate subcellular distribution of β-catenin (preventing TCF co-activation) without affecting β-catenin stability. |
Morpholino knockdown in Xenopus and chick, in vivo Wnt reporter assays, β-catenin subcellular localization analysis, rescue experiments |
Development (Cambridge, England) |
Medium |
27122165
|
| 2018 |
March2, a RING-type E3 ubiquitin ligase, antagonizes Wnt signaling by ubiquitin-mediated lysosomal degradation of Dishevelled. Dapper1 (Dpr1) stabilizes the interaction between March2 and Dsh specifically in the dorso-animal region of Xenopus embryos, enabling regional specificity of Dsh degradation for vertebrate head formation. |
Co-IP, ubiquitination assay, dominant-negative/morpholino constructs in Xenopus, regional expression analysis |
Development (Cambridge, England) |
Medium |
29549110
|
| 2018 |
Cyclin G2 interacts with Dapper1 (Dpr1), and this interaction impacts CKI-mediated phosphorylation of Dpr1 — cyclin G2 binding decreases Dpr1 phosphorylation by CKI, keeping Dpr1 in an active (unphosphorylated) state that suppresses Wnt/β-catenin signaling. This mechanism underlies cyclin G2-mediated inhibition of gastric cancer cell growth and migration. |
Yeast two-hybrid screening, Co-IP, Duolink PLA, TOPFlash reporter, Ccng2 knockout mice, CKI phosphorylation assay |
Journal of experimental & clinical cancer research : CR |
Medium |
30547803
|
| 2019 |
miR-125b-5p targets DACT1 (validated by luciferase assay), and DACT1 negatively regulates pancreatic β-cell function by promoting JNK signaling; miR-125b-5p improves β-cell function through inhibiting the JNK pathway via DACT1 suppression in T2DM mouse models. |
Luciferase reporter (miR-125b-5p → DACT1), siRNA knockdown, miRNA mimic/inhibitor transfection, JNK pathway readout |
Life sciences |
Low |
30684546
|
| 2020 |
Cyclin G2 interaction with Dapper1 decreases phosphorylation of Dpr1 at Ser762 by casein kinase 1 (CKI), thereby suppressing canonical Wnt signaling and protecting against tubulointerstitial fibrosis in diabetic nephropathy. |
Co-IP, phosphorylation site identification, CKI inhibitor assay, Ccng2 KO mouse, fibrosis markers |
Journal of cellular and molecular medicine |
Medium |
31978940
|
| 2021 |
TGF-β induces DACT1 expression, and DACT1 forms cytoplasmic protein condensates via liquid-liquid phase separation (LLPS) that do not co-localize with known organelles. These condensates require intrinsically disordered domains. Mass spectrometry of isolated condensates revealed sequestration of casein kinase 2 (a Wnt pathway activator), thereby repressing Wnt signaling. DACT1 condensates are maintained in vivo and are critical for breast and prostate cancer bone metastasis. |
Live-cell imaging, phase separation assay (LLPS), intrinsically disordered domain deletion, mass spectrometry of condensate proteome, in vivo xenograft bone metastasis model |
Nature cell biology |
High |
33723425
|
| 2021 |
TGF-β increases DACT1 expression in intestinal epithelial cells; the minimal DACT1 promoter is located in the region -500bp to +1bp with a potential regulatory element near -335bp. Wnt signaling has no effect on DACT1 expression. |
Promoter deletion analysis, site-directed mutagenesis, luciferase reporter assay |
Biomedicine & pharmacotherapy |
Low |
29136762
|
| 2022 |
FTO (m6A demethylase) reduces the mRNA stability of DACT1 via m6A demethylation, decreasing DACT1 expression and activating Wnt signaling in osteosarcoma. The m6A reader IGF2BP1 participates in stabilizing DACT1 mRNA. |
MeRIP-seq, RNA-seq, mRNA stability assay, RIP assay, IGF2BP1 knockdown, luciferase reporter |
Oncogene |
Medium |
35121825
|
| 2022 |
lncRNA CRNDE promotes DACT1 expression by recruiting p300 histone acetyltransferase to enrich H3K27ac at the DACT1 promoter, thereby upregulating DACT1 transcription and inhibiting Wnt/β-catenin pathway activation. |
ChIP assay for H3K27ac, Co-IP for CRNDE-p300 interaction, DACT1 promoter reporter, in vivo OA model |
Cellular and molecular life sciences : CMLS |
Medium |
35802196
|
| 2022 |
Heterozygous DACT1 missense variants located in the DVL2 interaction region cause CAKUT. Biochemical characterization revealed reduced binding of mutant DACT1 to DVL2. In CRISPR/Cas9-induced Dact1-/- murine inner medullary collecting duct cells, tubule formation was impaired in a branching morphogenesis assay. |
Whole-exome sequencing, Co-IP with DVL2 binding quantification, CRISPR/Cas9 KO, branching morphogenesis assay |
Human genetics |
Medium |
36066768
|
| 2025 |
Dact1 induces Dishevelled oligomerization, which causes Dvl to dissociate from Vangl but remain associated with Frizzled as signalosome-like clusters, co-aggregating with Fz upon non-canonical Wnt induction. Dact1 antagonizes Vangl and synergizes with wild-type Dvl but not oligomerization-defective Dvl mutants, indicating that Dact1 promotes the Dvl binding-partner switch from Vangl to Fz to initiate non-canonical Wnt signaling during convergent extension. |
Xenopus CE assay, Co-IP with Vangl/Fz/Dvl, Dvl oligomerization-defective mutants, live imaging of protein clusters, non-canonical Wnt induction assay |
Nature communications |
High |
40069199
|
| 2025 |
Activated S1P2 receptor binds to Dapper1 (Dpr1), decreasing Dvl degradation and causing β-catenin accumulation. The S1P2-Dpr1 binding also leads to S1P2 receptor nuclear translocation, where it activates CREB1 to promote EMT in pulmonary fibrosis. |
Co-immunoprecipitation (S1P2-Dpr1), immunofluorescence for nuclear translocation, Western blot for β-catenin, bleomycin IPF mouse model |
British journal of pharmacology |
Medium |
40222913
|
| 2024 |
Dact1 and Dact2 contribute to convergent extension and craniofacial morphogenesis in zebrafish; compound dact1/2 mutants phenocopy wnt11f2 mutants. dact1/2 regulate the mRNA expression of the calpain capn8, and capn8 overexpression phenocopies dact1/2 craniofacial dysmorphology, establishing a novel role for dact1/2 in regulating calcium-dependent proteolysis during embryogenesis. |
Zebrafish compound mutant generation, single-cell RNAseq, comparative whole-transcriptome analysis, overexpression of capn8 |
eLife |
Medium |
39570288
|