| 2002 |
Dab2 binds myosin VI via a C-terminal region of Dab2, linking endocytic vesicles to the actin cytoskeleton; the interaction was confirmed by yeast two-hybrid, in vitro binding assays, co-immunoprecipitation, and co-localization in clathrin-coated pits/vesicles at the apical domain of polarized epithelial cells. |
Yeast two-hybrid, mammalian two-hybrid, in vitro binding assay, co-immunoprecipitation, confocal co-localization |
Traffic (Copenhagen, Denmark) |
High |
11967127
|
| 2002 |
Dab2 is required in the visceral endoderm for embryo development prior to gastrulation (likely via TGFbeta/Nodal signaling), and is required in kidney proximal tubule cells for clathrin-coated pit formation and megalin/gp330-mediated lipoprotein receptor trafficking; conditional deletion from embryo proper yields viable mice with normal development but proteinuria. |
Targeted gene knockout in mouse, conditional deletion using Cre-lox, urinalysis, electron microscopy of clathrin-coated pits |
The EMBO journal |
High |
11927540
|
| 2000 |
The phosphotyrosine interaction domain (PID/PTB) of Dab2 binds the third PsiXNPXY motif in the cytoplasmic tail of megalin (gp600), as shown by yeast two-hybrid screening, in vitro binding assay, and co-immunoprecipitation from renal cell lysates. |
Yeast two-hybrid, in vitro binding assay, co-immunoprecipitation |
The Biochemical journal |
High |
10769163
|
| 2006 |
Dab2 acts as a cargo-specific endocytic adaptor for LDL receptors (LDLR), mediating their clustering into coated pits independently of AP-2 and ARH; this activity requires Dab2 binding to clathrin, LDLR, and phospholipids. In HeLa cells and fibroblasts, Dab2 is the primary adaptor for LDLR internalization, whereas ARH can compensate but requires AP-2. |
siRNA knockdown, fluorescence endocytosis assays, LDL uptake assays, domain-function mutagenesis |
Journal of cell science |
High |
16984970
|
| 2003 |
Dab2 N-terminal domain interacts with Dishevelled-3 (Dvl-3) and negatively regulates canonical Wnt/beta-catenin signaling; Dab2 overexpression maintains Dab2-Dvl-3 association, disrupts Dvl-3-axin interaction, stabilizes axin, and reduces nuclear beta-catenin and cyclin D1. Dab2-null MEFs exhibit constitutive Wnt signaling. |
Small-pool cDNA screen, co-immunoprecipitation, beta-catenin/TCF reporter assay, in vitro binding assay, Dab2 KO MEFs |
The EMBO journal |
High |
12805222
|
| 1998 |
Dab2 binds the SH3 domains of Grb2 via its C-terminal proline-rich domain (residues 600-730, key site #661-669), competing with Sos for Grb2 binding; both SH3 domains of Grb2 are required cooperatively for binding to Dab2. |
Co-immunoprecipitation from macrophage lysates, transfection competition assay in 293 cells, peptide inhibition, domain-binding experiments |
Oncogene |
High |
9569023
|
| 2001 |
DOC-2/DAB2 suppresses ERK phosphorylation by binding Grb2 via its second proline-rich domain in a growth-factor-stimulated manner, thereby interrupting the Grb2-SOS interaction and blocking downstream MAPK signaling; reduced ERK phosphorylation is rescued by increasing Grb2 expression or using a specific blocking peptide. |
Peptide competition, transfection rescue, co-immunoprecipitation, ERK phosphorylation assay, AP-1 reporter assay |
The Journal of biological chemistry |
High |
11371563
|
| 1999 |
PKC (specifically PKCbetaII, PKCgamma, and PKCdelta) directly phosphorylates Dab2 at Ser24; mutation of Ser24 to Ala abolishes PKC-induced phosphorylation and abrogates TPA-induced AP-1 inhibition, indicating that Ser24 phosphorylation is required for Dab2's growth-inhibitory function. |
In vitro kinase assay with recombinant substrates and isoform-specific PKC, site-directed mutagenesis (S24A), AP-1 reporter assay |
The Journal of biological chemistry |
High |
10542228
|
| 2005 |
TGFbeta induces Dab2 expression and increases its binding to beta1 integrin at the membrane; siRNA silencing of Dab2 inhibits integrin activation (reduced focal adhesion kinase phosphorylation), cell adherence, and TGFbeta-mediated EMT, while re-expression of human Dab2 rescues these effects. Dab2 ablation also blocks retinoic acid-induced visceral endoderm differentiation. |
siRNA knockdown, siRNA rescue (species-specific), FAK phosphorylation assay, cell adhesion assay, F9 differentiation model |
The Journal of biological chemistry |
High |
15734730
|
| 2005 |
Dab2 directly stimulates JNK activity and is required for TGFbeta-mediated fibronectin induction and cell migration; TGFbeta stimulates association of Dab2 with the MAP3K TAK1, and attenuation of TAK1 abolishes TGFbeta-induced fibronectin induction. |
siRNA stable knockdown, JNK kinase assay, co-immunoprecipitation (Dab2-TAK1), dominant-negative TAK1, fibronectin induction assay, cell migration assay |
The Journal of biological chemistry |
High |
15894542
|
| 2005 |
Dab2 p96 isoform, which retains endocytic protein-binding sites absent from p67, is required for efficient megalin endocytosis in visceral endoderm; knock-in of p96 fully rescues endocytosis and embryonic viability, while p67 only partially rescues. |
Isoform-specific knock-in mice, endocytosis assays (transferrin/cubilin uptake), embryonic viability scoring |
Journal of cell science |
High |
16263760
|
| 2005 |
In renal proximal tubule, Dab2 co-localizes with megalin in clathrin-coated pits/vesicles; megalin knockout nearly abolishes Dab2 staining (Dab2 localization requires megalin), and Dab2 knockout redistributes megalin from endosomes to microvilli with decreased total megalin protein. Introduction of anti-Dab2 antibody into BN16 cells decreased internalization of receptor-associated protein. |
Immunohistochemistry, megalin/Dab2 conditional knockout mice, immunoblotting, intracellular antibody injection, 125I-RAP internalization assay |
American journal of physiology. Renal physiology |
High |
15870384
|
| 2009 |
Dab2 mediates bulk endocytosis of inactive integrins beta1, alpha1, alpha2, and alpha3 (but not alpha5 or alphav) into coated pits; Dab2 depletion inhibits cell migration and polarized recycling of integrin beta1 to the leading edge, and migration speed correlates with intracellular integrin pool size. |
Quantitative glycoprotein surface proteomics (SILAC), siRNA depletion, fluorescence microscopy, integrin beta1 surface/intracellular level manipulation, migration assay |
The Journal of cell biology |
High |
19581412
|
| 2009 |
Dab2 attenuates Wnt/beta-catenin signaling by binding to Axin and acting as a competitive inhibitor of PP1, preventing PP1-mediated dephosphorylation and destabilization of Axin. The N-terminal PTB domain of Dab2 is sufficient to block PP1-Axin interactions; Dab2 overexpression in zebrafish phenocopies Axin overexpression. |
Co-immunoprecipitation, in vitro binding competition assay, Dab2 truncation mutants, beta-catenin reporter assay, Dab2 ectopic expression in zebrafish embryos |
Oncogene |
High |
19581931
|
| 2007 |
Dab2 interacts with Axin and prevents Axin's interaction with and degradation by LRP5/6 Wnt co-receptor, thereby increasing Axin half-life and stabilizing the beta-catenin destruction complex to inhibit Wnt signaling. |
Co-immunoprecipitation, Axin half-life assay, beta-catenin reporter assay, F9 and mammary cell differentiation models |
Oncogene |
High |
17922036
|
| 2012 |
Dab2 selectively recruits LRP6 to the clathrin-dependent endocytic pathway upon CK2-mediated phosphorylation of LRP6 at S1579, sequestering LRP6 from caveolin-dependent endocytosis required for Wnt signaling. LRP6-S1579A mutant fails to bind Dab2, escapes clathrin routing, and is insensitive to Dab2-mediated Wnt inhibition. |
Co-immunoprecipitation, site-directed mutagenesis (LRP6-S1579A), clathrin/caveolin endocytosis assays, Wnt reporter assay, zebrafish dorsoventral patterning, allograft mouse tumor model |
The EMBO journal |
High |
22491013
|
| 2010 |
TGFbeta induces phosphorylation of hnRNP E1 at Ser43 by PKBbeta/Akt2, releasing hnRNP E1 from the 33-nucleotide BAT element in the 3'UTR of Dab2 (and ILEI) mRNAs, thereby relieving translational repression and inducing Dab2 protein expression as part of a post-transcriptional EMT regulon. |
RNA-protein binding assay, phospho-specific immunoblot, siRNA modulation of hnRNP E1, Akt2 kinase assay, translation reporter assay |
Nature cell biology |
High |
20154680
|
| 2010 |
Dab2 knockdown does not affect internalization of TGFbeta, LDL, or transferrin but abrogates TGFbeta receptor recycling from early endosomes to the recycling compartment, resulting in enlarged EEA1-positive endosomes and diminished Smad2 phosphorylation. |
siRNA knockdown, endosome morphology (EEA1 immunofluorescence), receptor recycling assay, Smad2 phosphorylation assay |
Molecular biology of the cell |
High |
20881059
|
| 2002 |
DOC-2/DAB2 interacts with DIP1/2, a novel GTPase-activating protein with a Ras GAP homology domain, via the N-terminal domain of DOC-2/DAB2; this complex is detected in normal brain and prostate. DIP1/2 expression blocks mitogen-induced gene expression and inhibits prostate cancer cell growth. |
Yeast two-hybrid cloning, co-immunoprecipitation from tissue lysates, cell growth assay |
The Journal of biological chemistry |
Medium |
11812785
|
| 2002 |
DOC-2/DAB2 proline-rich domain interacts with the SH3 domain of c-Src; this binding is enhanced by growth factor and results in c-Src inactivation (decreased pTyr416) and reduced downstream effector activity. |
Co-immunoprecipitation, c-Src kinase activity assay (pTyr416), growth factor stimulation |
The Journal of biological chemistry |
Medium |
12473651
|
| 2001 |
DOC-2/hDab-2 expression in breast cancer cells induces anoikis associated with down-regulation of integrin-linked kinase (ILK) activity, suggesting Dab2 negatively regulates the ILK anti-apoptotic pathway. |
Transfection, suspension-induced cell death (anoikis) assay, ILK kinase activity assay |
Oncogene |
Medium |
11687976
|
| 2003 |
Dab2 associates with CIN85 via its PKPAPR motif in the C-terminus, recruiting CIN85 to the clathrin coat; growth factor stimulation dissociates Dab2 and clathrin from CIN85, enabling Cbl to bind CIN85 during receptor tyrosine kinase endocytosis. |
Co-immunoprecipitation, peptide binding assay, growth factor stimulation time-course |
FEBS letters |
Medium |
14596919
|
| 2009 |
The p82 isoform of Dab2 induces enlarged clathrin assemblies at the plasma membrane dependent on a functional PTB domain, clathrin binding, phospholipid binding, and a poly-lysine stretch preceding the PTB domain; p82 expression also enhances cell spreading on fibronectin and concentrates beta1 integrin into clathrin-p82 assemblies. |
GFP-fusion expression, live-cell imaging, FRAP, clathrin assembly morphology, site-directed mutagenesis, fibronectin spreading assay |
The Biochemical journal |
High |
19000037
|
| 2010 |
Dab2 is progressively displaced from the plasma membrane and loses co-localization with clathrin during mitosis, peaking at metaphase/anaphase; this displacement is accompanied by Dab2 phosphorylation, reduced Dab2-clathrin interactions, decreased endocytic vesicle motility, and impaired internalization of NPXY-containing cargo. Ser/Thr-to-Ala mutations in the central region of Dab2 attenuate its phosphorylation and membrane displacement, maintaining endocytic activity during mitosis. |
Live-cell imaging, immunofluorescence, FRAP, co-immunoprecipitation, NPXY-cargo internalization assay, site-directed mutagenesis (Ser/Thr→Ala), pharmacological mitotic arrest (2-methoxyestradiol) |
The Journal of biological chemistry |
High |
21097498
|
| 2012 |
Dab2 binds Eps15 and intersectin via its EH-domain binding sites; mutation of these sites impairs integrin beta1 endocytosis (but not transferrin receptor) without displacing Dab2 from clathrin structures, indicating that Dab2-mediated recruitment of EH domain proteins selectively drives internalization of Dab2 cargo. |
Co-immunoprecipitation, site-directed mutagenesis (EH-binding site mutants), integrin beta1 and transferrin endocytosis assay, clathrin structure analysis |
Molecular biology of the cell |
High |
22648170
|
| 2012 |
Dab2 depletion in airway epithelial cells inhibits CFTR endocytosis and post-endocytic trafficking from sorting endosome to recycling compartment and to late endosome, resulting in increased CFTR half-life (~3-fold); this is distinct from AP-2 depletion which primarily reduces endocytosis without affecting CFTR stability. |
siRNA depletion of Dab2 vs. AP-2, CFTR surface biotinylation, endocytosis assay, recycling assay, protein half-life measurement |
The Biochemical journal |
High |
21995445
|
| 2014 |
Dab2 interacts with TGFbeta type I receptor (TbetaRI), restricts its lateral diffusion at the plasma membrane, and enhances clathrin-mediated endocytosis of TbetaRI; Dab2 negatively regulates TGFbeta-induced JNK activation but not Smad pathway activation. JNK activation by TGFbeta in the absence of Dab2 is disrupted by cholesterol depletion, indicating TbetaRI localizes to cholesterol-rich domains when Dab2 is absent. |
Biophysical lateral diffusion measurements (SPT/FRAP), siRNA knockdown and overexpression, JNK and Smad phosphorylation assays, cholesterol depletion |
Molecular biology of the cell |
High |
24648493
|
| 2018 |
In endothelial cells, Dab2 recruitment to the apoER2 NPXY motif promotes activating L309 methylation of the PP2A catalytic subunit by LCMT-1; simultaneously, SHC1 recruits the PP2A scaffolding subunit to the proline-rich apoER2 C-terminus, forming a PP2A holoenzyme that dephosphorylates (inactivates) Akt and eNOS, mediating antiphospholipid antibody-induced thrombosis. |
Co-immunoprecipitation, PP2A methylation assay, Akt/eNOS phosphorylation assays, mouse thrombosis model with endothelial-specific manipulation |
Blood |
High |
29500169
|
| 2005 |
ApoER2 internalizes via clathrin-mediated endocytosis through its cytoplasmic FxNPXY motif binding to Dab2; dominant-negative Dab2 and eps15 reduce apoER2 internalization, whereas blocking caveolar/raft pathway (nystatin) has no effect. Raft association of apoER2 does not determine its endocytic route. |
Dominant-negative Dab2 and eps15 expression, nystatin treatment, apoER2 internalization assay, mutagenesis of FxNPXY motif |
Traffic (Copenhagen, Denmark) |
High |
16101684
|
| 2010 |
Amnionless (AMN) FXNPXF motifs in cubam receptor mediate endocytosis through direct interaction with Dab2 and ARH; the two signals are functionally redundant, demonstrated by sequential mutation and yeast two-hybrid analyses. |
Yeast two-hybrid, amnionless mutant expression panel, endocytosis assay |
Traffic (Copenhagen, Denmark) |
Medium |
20088845
|
| 2014 |
ARH and Dab2 both bind LDLR but not NPC1L1, and are not required for NPC1L1 internalization; Numb specifically binds NPC1L1 and mediates cholesterol absorption, distinctly from ARH and Dab2 which selectively participate in LDLR-mediated LDL uptake. |
Co-immunoprecipitation, siRNA knockdown, LDL and cholesterol uptake assays, domain-specific PTB binding studies |
The Journal of biological chemistry |
High |
25331956
|
| 2012 |
Akt/PKB interacts with the proline-rich domain (PRD) of Dab2 via its PH and catalytic domains, and phosphorylates Dab2 at Ser448 and Ser449; Ser-to-Ala mutations at these sites inhibit albumin endocytosis and shift Dab2 localization from peripheral to perinuclear compartment, demonstrating that Akt-mediated Dab2 phosphorylation is required for albumin endocytosis. |
Co-immunoprecipitation, GST pull-down with truncated constructs, yeast two-hybrid, Akt isoform-specific siRNA, Dab2 Ser448/449Ala mutagenesis, albumin endocytosis assay, Dab2 localization imaging |
American journal of physiology. Renal physiology |
High |
22218591 25253241
|
| 2009 |
Dab2 is a FOXP3 target gene exclusively expressed in FOXP3+ regulatory T cells; regulatory T cells lacking Dab2 are functionally impaired in vitro and in vivo (suppressive capacity), but Dab2 is dispensable for Treg-mediated naive T cell homeostasis. |
Flow cytometry, genetic KO of Dab2 in Tregs, in vitro suppression assay, in vivo adoptive transfer |
Journal of immunology |
High |
19767570
|
| 2016 |
DAB2 loss in zebrafish (CRISPR/Cas9 KO) reduces cardiomyocyte number and increases WNT/beta-catenin signaling; these defects are suppressed by DKK1 overexpression, placing DAB2 upstream of WNT signaling in cardiac development. |
CRISPR/Cas9 knockout in zebrafish, cardiomyocyte counting, WNT/beta-catenin signaling assay, DKK1 rescue experiment, label-free quantitative proteomics in human ESC differentiation |
Proceedings of the National Academy of Sciences of the United States of America |
High |
26755607
|
| 2016 |
Combined deletion of Dab2 and Arh in mice results in profound hypercholesterolemia similar to LDLR knockout; in liver, Dab2 is expressed in sinusoidal endothelial cells (not hepatocytes) and in the absence of Arh, Dab2 in liver endothelial cells regulates cholesterol synthesis (HMG-CoA reductase levels) in hepatocytes. |
Double KO mice (arh/dab2), serum cholesterol measurement, HMG-CoA reductase western blot, cell-type-specific immunostaining |
Journal of lipid research |
High |
27005486
|
| 2019 |
DAB2 expression in dendritic cells is rapidly downregulated by TLR ligands in a TRIF- and MyD88-dependent biphasic manner (rapid protein drop then sustained mRNA reduction); DAB2 knockdown promotes activated DC phenotype (increased IL-12, IL-6, CD40), reduces phagocytosis, and Dab2-KO DCs inhibit autophagy and promote apoptotic cell death. |
BMDC TLR stimulation, siRNA/KO, qPCR, flow cytometry, cytokine ELISA, autophagy assay, TRIF/MyD88 pathway analysis |
Frontiers in immunology |
High |
30873168
|
| 2021 |
Dab2 myosin interacting region (MIR) binds myosin VI with moderate affinity (Kd ~184 nM) and high turnover rate (~1 s-1); dynamic (not stable) multimerization of Dab2-MIR/myosin VI complexes promotes cargo processivity on actin while preserving cortical actin network integrity. Constitutive stable dimers cause actin reorganization and foci formation. |
Single-molecule kinetics, in vitro motility assay, DNA origami scaffold-based cargo mimetics, minimal actin cortex assay on lipid bilayers, fluorescence microscopy |
The Journal of biological chemistry |
High |
33372034
|
| 2008 |
DAB2 silencing in human endothelial cells activates Src-FAK signaling, ERK and JNK activation, inhibits p38 phosphorylation, and promotes cell proliferation/migration while impairing capillary-like morphogenesis; pharmacological Src inhibition (PP2) abolishes FAK activation and restores endothelial differentiation. |
Lentiviral shRNA knockdown, Src/FAK phosphorylation assay, ERK/JNK/p38 immunoblot, endothelial tube formation assay, PP2 pharmacological rescue |
FEBS letters |
Medium |
18582465
|
| 2024 |
HDAC5 deacetylates H3K9ac at the DAB2 promoter, repressing DAB2 expression; A. muciniphila inhibits HDAC5, thereby increasing DAB2 expression, which blocks macrophage pro-inflammatory M1 polarization. DAB2 overexpression reverses HDAC5-induced pro-inflammatory polarization. |
ChIP for H3K9ac, siRNA/overexpression of HDAC5 and DAB2, macrophage polarization assay, in vivo DSS colitis model with A. muciniphila treatment |
Biochimica et biophysica acta. Molecular cell research |
Medium |
38776988
|
| 2000 |
GATA-6 (but not GATA-4) transcriptionally activates the Dab2 promoter in visceral endoderm; GATA-6-null ES cells lack Dab2 expression, and forced GATA-6 expression in NIH-3T3 cells transactivates the human Dab2 promoter. The specificity is not mediated through GATA-6's zinc finger DNA-binding domain. |
Subtractive hybridization, in vivo GATA-6 KO embryos, co-transfection reporter assay, GATA-4 KO embryos as negative control |
The Journal of biological chemistry |
Medium |
10779506
|
| 2023 |
In kidney proximal tubule cells, megalin, cubilin/amnionless (CUBAM), and Dab2 each have distinct roles in albumin endocytosis and endocytic pathway flux; CRISPR KO of each component has different effects on albumin uptake concentration-dependence and intracellular distribution, but key endocytic pathway proteins are preserved in all KOs, indicating these components drive endocytic flux without compromising pathway integrity. |
CRISPR/Cas9 KO in differentiated proximal tubule cell line, albumin internalization assay, fluid-phase marker uptake, confocal imaging, megalin KO mice |
Molecular biology of the cell |
High |
37126375
|