| 2002 |
DAB2IP (then called DIP1/2) was cloned as a novel GTPase-activating protein (GAP) that interacts with the N-terminal domain of DOC-2/DAB2. It contains a Ras-GAP homology domain, 10 proline repeats, and a leucine zipper. Interaction between DOC-2/DAB2 and DIP1/2 is detected in normal brain and prostate tissues. The complex blocks mitogen-induced gene expression and inhibits prostate cancer growth. |
Yeast two-hybrid cloning, co-immunoprecipitation, structural domain characterization, functional growth assays |
The Journal of Biological Chemistry |
High |
11812785
|
| 2002 |
Human DAB2IP is a novel member of the Ras-GTPase-activating protein family that directly interacts with DAB2. The gene is located at 9q33.1-q33.3, spans ~96 kb with 15 exons, and its promoter lacks a TATA box. Transcriptional downregulation via epigenetic mechanisms (reduced promoter activity) is responsible for loss of DAB2IP expression in prostate cancer cells. |
Molecular cloning, promoter mapping and luciferase reporter assay, RT-PCR expression analysis |
Genomics |
Medium |
11944990
|
| 2003 |
Mouse Dab2IP interacts with the intracellular adapter protein Disabled-1 (Dab1) in brain lysates; the interaction is mediated by the Dab1-PTB domain and an NPxY motif in Dab2IP. This positions Dab2IP as a potential downstream effector in the Reelin signaling pathway that influences Ras signaling during brain development. |
Yeast two-hybrid screen, co-immunoprecipitation from brain lysates, domain mapping, Northern blot, in situ hybridization, immunohistochemistry |
Brain Research. Molecular Brain Research |
Medium |
12877983
|
| 2004 |
DAB2IP (AIP1) is localized on the plasma membrane of resting endothelial cells in a complex with TNFR1. TNF binding induces AIP1 release from TNFR1, cytoplasmic translocation, and formation of a signaling complex with TRADD, RIP1, TRAF2, and AIP1. A proline-rich region (aa 796–807) maintains AIP1 in a closed conformation associated with TNFR1; deletion of this region causes constitutive binding to TRAF2 and ASK1. A PERIOD-like domain (aa 591–719) binds the RING finger of TRAF2 and enhances TRAF2-induced ASK1 activation, while simultaneously inhibiting IKK-NF-κB signaling. |
Co-immunoprecipitation, subcellular fractionation, deletion mutant analysis, domain mapping, signaling reporter assays |
The Journal of Biological Chemistry |
High |
15310755
|
| 2009 |
DAB2IP functions as a scaffold protein that simultaneously suppresses the PI3K-Akt survival pathway and enhances ASK1 activation leading to apoptosis. Structural-functional analyses indicate that the proline-rich (PR) and PERIOD-like (PER) domains regulate PI3K-Akt activity, while the C2 domain is critical for ASK1 activity. Loss of DAB2IP in mice results in glandular epithelial hyperplasia and apoptotic defects. |
Gain-of-function and loss-of-function experiments, domain deletion mutagenesis, Western blot signaling analysis, DAB2IP knockout mouse model, in vivo xenograft |
Proceedings of the National Academy of Sciences of the United States of America |
High |
19903888
|
| 2010 |
Loss of DAB2IP initiates epithelial-to-mesenchymal transition (EMT) characterized by E-cadherin repression and vimentin upregulation in prostate epithelial and carcinoma cells. DAB2IP functions as a scaffold protein modulating EMT by regulating nuclear β-catenin/TCF transcriptional activity. Restoration of DAB2IP in metastatic PCa cells reversed EMT; knockdown in a xenograft model led to lymph node and distant organ metastases. |
Knockdown/overexpression in cell lines, DAB2IP knockout mouse model, human prostate xenograft-mouse model, reporter assays, clinical specimen IHC |
Proceedings of the National Academy of Sciences of the United States of America |
High |
20080667
|
| 2012 |
DAB2IP is epigenetically silenced in medulloblastoma by EZH2-induced trimethylation of its promoter (H3K27me3). Ectopic DAB2IP expression enhances stress-induced apoptosis in medulloblastoma cells, and reduced DAB2IP confers resistance to irradiation-induced cell death. |
Gene expression meta-analysis, chromatin immunoprecipitation (EZH2/H3K27me3), ectopic expression functional assays, irradiation survival assays |
Clinical Cancer Research |
Medium |
22696229
|
| 2012 |
DAB2IP is required for proper neuronal migration in the embryonic mouse neocortex. Knockdown disrupts the transition from multipolar to bipolar neuronal morphology in the intermediate zone and impairs neurite development, associated with reduced expression of neuronal microtubule-associated proteins (MAPs). Both PH and GRD (GAP-related) domains are required for neuronal migration. |
In utero electroporation (shRNA knockdown and overexpression), immunohistochemistry, domain deletion in vivo structure-function analysis, ex vivo neuronal culture |
PLoS ONE |
High |
23056358
|
| 2012 |
DAB2IP regulates autophagy in prostate cancer cells. Restoring DAB2IP expression decreases autophagy-associated proteins (LC3B, Beclin-1) and reduces phosphorylation of S6K and mTOR, shifting cells toward apoptosis in response to combined radiation and DNA-PKcs inhibition. |
DAB2IP knockdown/restoration in cell lines, Western blot for autophagy markers and mTOR signaling, apoptosis assays, colony formation, in vivo xenograft |
Neoplasia |
Medium |
23308052
|
| 2013 |
DAB2IP inhibits androgen receptor (AR) signaling through two distinct mechanisms: (1) suppressing AR nuclear translocation/phosphorylation in the genomic pathway and (2) inactivating c-Src via a unique functional domain in the non-genomic pathway. DAB2IP also inhibits constitutively active AR splice variants. In DAB2IP-/- mice, prostate epithelia show hyperplasia with more active AR. |
Cell line gain/loss of function, AR nuclear translocation assays, c-Src kinase assays, domain-specific mutants, DAB2IP knockout mouse model, tissue microarray |
Oncogene |
High |
23604126
|
| 2013 |
DAB2IP blocks cross-talk between Wnt/β-catenin and IGF-I signaling, suppressing Egr-1 expression which in turn controls Clusterin (an antiapoptotic factor). Loss of DAB2IP in chemoresistant prostate cancer cells leads to elevated Egr-1 and Clusterin via this pathway, conferring resistance to docetaxel and other chemotherapeutic drugs. |
Knockdown/overexpression in cell lines, luciferase reporter assay for Egr-1/Clusterin regulation, rescue experiments (Clusterin shRNA/OGX-011), Western blot signaling, DAB2IP KO mouse model, tissue microarray |
Clinical Cancer Research |
High |
23838317
|
| 2013 |
Dab2IP deficiency in mouse cerebellum produces a delay in Purkinje cell dendrite development, a decrease in parallel fiber synaptic marker VGluT1, and an increase in climbing fiber synaptic marker VGluT2, demonstrating a role for Dab2IP in dendrite development and synapse number regulation. |
Retrovirus gene trap Dab2IP knockdown mouse model, immunohistochemistry for synaptic markers, morphological analysis of Purkinje cell dendrites |
PLoS ONE |
Medium |
23326475
|
| 2014 |
Mutant p53 (mutp53) binds and inhibits DAB2IP in the cytoplasm, thereby fueling NF-κB activation and dampening ASK1/JNK activation in response to TNFα. This leads to increased invasiveness of cancer cells responding to inflammatory cytokines. Interfering with the mutp53-DAB2IP interaction reduced cancer cell aggressiveness in xenografts. |
Co-immunoprecipitation (mutp53-DAB2IP interaction), cytoplasmic fractionation, NF-κB and ASK1/JNK signaling assays, xenograft mouse model, interference with interaction |
Molecular Cell |
High |
25454946
|
| 2014 |
DAB2IP suppresses cancer stem cell (CSC) properties by (1) suppressing c-kit (CD117) gene expression through interaction with a silencer element in the c-kit gene, and (2) inhibiting c-kit–PI3K–Akt–mTOR signaling that increases c-Myc to activate ZEB1 gene expression. Loss of DAB2IP elevates ZEB1 and CD117, increasing CSC phenotypes. |
Gain/loss-of-function in cell lines, promoter-silencer reporter assay, signaling pathway analysis (Western blot), DAB2IP KO mouse model, clinical specimen correlation |
Oncogene |
High |
25043300
|
| 2014 |
Akt1 phosphorylates DAB2IP on S847, which regulates the interaction between DAB2IP and its effector molecules H-Ras and TRAF2. Additionally, DAB2IP is degraded through the ubiquitin-proteasome pathway by SCF(Fbw7), which recognizes two Fbw7 phospho-degron motifs in DAB2IP regulated by the kinase CK1δ. |
In vitro kinase assay (Akt1 phosphorylation of DAB2IP), co-immunoprecipitation (DAB2IP-H-Ras/TRAF2), proteasome inhibitor experiments, phospho-degron mutant analysis, CK1δ kinase assays |
Oncotarget |
Medium |
24912918
|
| 2014 |
DAB2IP interacts with and suppresses STAT3 via its proline-rich (PR) domain, inhibiting STAT3 phosphorylation, transactivation, and downstream survivin expression. Loss of DAB2IP stabilizes mitochondrial transmembrane potential and prevents cytochrome c/Omi/Smac release, conferring resistance to androgen deprivation-induced apoptosis. |
Co-immunoprecipitation (DAB2IP-STAT3), domain mapping (PR domain), Western blot for apoptotic mediators, mitochondrial membrane potential assay, DAB2IP KO mouse model, luciferase reporter |
Cell Death & Disease |
High |
26512963
|
| 2014 |
Skp2 (E3 ubiquitin ligase) mediates proteasome-dependent degradation of DAB2IP, with the ubiquitination site located in the N-terminal domain. Reciprocally, DAB2IP suppresses Skp2 protein expression through Akt signaling, forming a homeostatic feedback loop. |
Co-immunoprecipitation, ubiquitination assays, proteasome inhibitor experiments, domain mapping (N-terminal), Western blot with Akt pathway inhibitors, tissue microarray IHC |
Oncotarget |
Medium |
25115390
|
| 2015 |
DAB2IP regulates neuronal positioning in the developing cortex by modulating Rap1 and integrin signaling. Dab2IP knockdown results in elevated activated Rap1 and integrin levels in the developing cortex, linking Dab2IP to multipolar-to-bipolar transition of migrating neurons via these signaling intermediates. |
Dab2IP knockdown mouse model (retroviral gene trap), BrdU birth dating, layer-specific marker immunohistochemistry, Rap1 and integrin activation assays |
Developmental Neuroscience |
Medium |
25721469
|
| 2016 |
Smurf1 (E3 ubiquitin ligase) negatively regulates DAB2IP through ubiquitin-mediated degradation. Smurf1-mediated cell proliferation and migration are largely dependent on DAB2IP as a key effector. Akt1 and Akt2 phosphorylate Smurf1, increasing Smurf1 abundance and further reducing DAB2IP levels. |
Co-immunoprecipitation, ubiquitination assays, knockdown rescue experiments, Akt phosphorylation assays, cell proliferation and migration assays |
Oncotarget |
Medium |
27036023
|
| 2016 |
DAB2IP loss impairs kinetochore-microtubule (KT-MT) attachment, compromises the spindle assembly checkpoint (SAC), and causes aberrant chromosomal segregation. Mechanistically, DAB2IP directly interacts with Plk1 and its loss inhibits Plk1 kinase activity, impairing Plk1-mediated BubR1 phosphorylation and reducing BubR1 localization at kinetochores during mitosis. DAB2IP restoration enhances sensitivity to microtubule-stabilizing drugs and a Plk1 inhibitor. |
Co-immunoprecipitation (DAB2IP-Plk1), kinase activity assay, BubR1 phosphorylation assay, kinetochore localization by immunofluorescence, chromosomal segregation analysis, drug sensitivity assays |
Nucleic Acids Research |
High |
27568005
|
| 2016 |
DAB2IP suppresses PROX1 transcription in prostate cancer cells. In DAB2IP-deficient cells, PROX1 overexpression stabilizes HIF1α protein by inhibiting the ubiquitin-proteasome pathway, leading to EMT (E-cadherin repression, vimentin upregulation, MMP induction) and enhanced cell migration. |
Cell line gain/loss-of-function, promoter reporter assays for PROX1, HIF1α ubiquitination and stability assays, Western blot, migration assay, DAB2IP KO mouse model |
Cellular Signalling |
Medium |
27476001
|
| 2016 |
Loss of DAB2IP in renal cell carcinoma activates ERK/RSK1 and PI3K/mTOR pathways, synergistically inducing HIF-2α expression. Elevated HIF-2α suppresses p21/WAF1, conferring resistance to mTOR inhibitors. Combined targeting of both pathways results in synergistic tumor inhibition. |
DAB2IP knockdown/overexpression in RCC cell lines, Western blot pathway analysis, HIF-2α knockdown rescue, drug sensitivity assays, in vivo xenograft |
Oncogene |
Medium |
26876207
|
| 2017 |
Mutant p53 (mutp53) augments insulin-induced AKT1 activation by binding and inhibiting DAB2IP in the cytoplasm, providing a specific gain-of-function for mutant p53 in response to insulin stimulation and increasing cancer cell proliferation and invasiveness. |
Co-immunoprecipitation (mutp53-DAB2IP in cytoplasmic fractions), AKT1 phosphorylation assays, gain/loss-of-function with cell proliferation and invasion readouts |
Proceedings of the National Academy of Sciences of the United States of America |
Medium |
28667123
|
| 2017 |
DAB2IP acts as a GAP toward RAB40C GTPase, binding RAB40C mainly via its GAP domain to regulate lipid droplet (LD) homeostasis. Overexpression of DAB2IP or its GAP-defective mutant, and siRNA depletion of DAB2IP, confirm that DAB2IP negatively regulates RAB40C-mediated LD accumulation. |
Co-immunoprecipitation (DAB2IP-RAB40C), CRISPR-Cas9 RAB40C knockout, GAP-defective mutant overexpression, siRNA depletion, lipid droplet quantification by imaging |
Oncotarget |
Medium |
29156729
|
| 2017 |
Down-regulation of DAB2IP increases hnRNPK protein levels through the MAPK/ERK signaling pathway, causing translocation of hnRNPK into the nucleus where it enhances MMP2 transcription, thereby promoting invasion and metastasis of colorectal cancer cells. |
2D-DIGE proteomics to identify hnRNPK, cDNA microarray to identify MMP2, DAB2IP knockdown/overexpression, nuclear/cytoplasmic fractionation, MMP2 promoter reporter assay, invasion assays |
International Journal of Cancer |
Medium |
28335083
|
| 2018 |
miR-149-3p is a direct post-transcriptional negative regulator of DAB2IP. Downregulation of DAB2IP by miR-149-3p enhances cancer cell motility and invasiveness, activates NF-κB signaling, promotes expression of pro-inflammatory and pro-angiogenic factors. Notably, miR-149-3p secreted by prostate cancer cells induces DAB2IP downregulation in recipient vascular endothelial cells, stimulating their proliferation and motility. |
High-throughput miRNA mimic screen, luciferase reporter assay for direct targeting, NF-κB signaling assays, endothelial cell transfer/co-culture experiments, tumor growth assays with endogenous miR-149-3p inhibition |
Cell Death and Differentiation |
Medium |
29568059
|
| 2020 |
In ovarian cancer stem cells (OCSCs), DAB2IP is silenced by EZH2-mediated H3K27 trimethylation of the DAB2IP promoter. CRISPR/Cas9 deletion of DAB2IP upregulates stemness genes and converts non-CSC to CSC. DAB2IP suppresses the CSC phenotype by inhibiting WNT5B expression, which reduces noncanonical WNT signaling via C-JUN activation downstream of RAC1. |
CRISPR/Cas9 deletion, ChIP for H3K27me3 at DAB2IP promoter, transcriptomic analysis, reverse phase protein array, RAC1 inhibition experiments, in vivo tumor growth assays |
Cancer Research |
High |
32816909
|
| 2020 |
RASSF1A binds to DAB2IP and upregulates DAB2IP protein levels in NSCLC cells. Suppression of RASSF1A leads to downregulation of DAB2IP and enhanced GTP loading onto RAS (increased RAS activation), thereby increasing RAS mitogenic signaling in both mutant- and wildtype-RAS cells. |
Co-immunoprecipitation (RASSF1A-DAB2IP), shRNA knockdown and stable overexpression, Ras-GTP pull-down assay, in vitro and in vivo growth assays |
Cancers |
Medium |
33348649
|
| 2020 |
DAB2IP physically interacts with KIF3a (kinesin-2 family member) through its PH domain, and this interaction is important for primary cilia stability. Loss of DAB2IP in normal kidney epithelial cells significantly impairs primary cilia formation. |
Mass spectrometry identification of DAB2IP-interacting proteins (KIF3a), co-immunoprecipitation, domain mapping (PH domain), immunofluorescence for primary cilia |
Neoplasia |
Medium |
33341566
|
| 2021 |
DAB2IP is phosphorylated by Cdks during mitosis, mediating its interaction with PLK1 and activation of the PLK1-Mps1 pathway. DAB2IP acts as a scaffold to facilitate PLK1-Mps1 targeting of Cdc20. DAB2IP interacts with Cdc20 in a phosphorylation-independent manner; however, DAB2IP phosphorylation inhibits Cdc20 ubiquitylation during SAC, blocking premature APC/C-MCC release. Loss of Cdk-mediated DAB2IP phosphorylation destabilizes the mitotic checkpoint complex (MCC), impairs SAC, and causes chromosomal instability. |
Phosphorylation site identification and mutagenesis (Cdk sites), co-immunoprecipitation (DAB2IP-PLK1, DAB2IP-Cdc20, PLK1-Mps1), Cdc20 ubiquitylation assay, SAC and chromosomal segregation assays, anaphase bridge/53BP1 body quantification |
Oncogene |
High |
34775484
|
| 2022 |
DAB2IP interacts with the chaperone GRP75 via its Ras-GAP domain, competitively blocking GRP75-driven ubiquitination and proteasomal degradation of wild-type p53. This DAB2IP-GRP75 interaction stabilizes p53 and mediates tumor-suppressive effects in colon cancer cells. |
Mass spectrometry (identification of DAB2IP-p53-GRP75 complex), co-immunoprecipitation, competitive binding assay, ubiquitination assay, domain-deletion mutants (Ras-GAP domain required), in vivo tumor experiments |
Cancer Letters |
High |
35150809
|
| 2022 |
DAB2IP inhibits intratumoral testosterone synthesis in castration-resistant prostate cancer by suppressing AKR1C3 promoter activity and the conversion of DHEA to testosterone through the PI3K/AKT/mTOR/ETS1 signaling pathway, thereby reducing AR re-activation under androgen-depleted conditions. |
DAB2IP knockdown/overexpression, AKR1C3 promoter luciferase reporter assay, testosterone synthesis measurement, signaling pathway inhibition, in vivo castration model with DAB2IP-/- mice and DHEA supplementation |
Cellular Signalling |
Medium |
35452821
|
| 2022 |
DAB2IP downregulates HSP90AA1 expression through the HSP90AA1/SRP9/ASK1/JNK signaling axis to promote apoptosis in colorectal cancer cells. Mechanistic studies confirmed the DAB2IP-HSP90AA1 regulatory connection through bioinformatic prediction plus in vitro validation. |
Bioinformatic pathway analysis, in vitro knockdown/overexpression, apoptosis flow cytometry, Western blot for ASK1/JNK activation, in vivo xenograft |
BMC Cancer |
Low |
35590292
|
| 2022 |
DAB2IP inhibits β-catenin nuclear transport by competitively interacting with RAC1, thereby reducing β-catenin accumulation in the cell nucleus and attenuating cancer stem cell properties and chemoresistance in triple-negative breast cancer. |
Co-immunoprecipitation (DAB2IP-RAC1 competitive interaction), nuclear/cytoplasmic fractionation of β-catenin, DAB2IP knockdown/overexpression, in vivo xenograft experiments |
Clinical and Translational Medicine |
Medium |
36536485
|
| 2023 |
DAB2IP suppresses invadopodia formation and breast cancer metastasis by destabilizing anaplastic lymphoma kinase (ALK) through antagonizing the interaction between the deubiquitinase USP10 and ALK, leading to decreased ALK protein abundance, reduced Cortactin tyrosine phosphorylation, and prevention of invadopodia formation. |
Co-immunoprecipitation (DAB2IP-USP10-ALK competitive binding), Cortactin phosphorylation assay, invadopodia formation assay, in vivo metastasis model, ALK protein stability assays |
iScience |
Medium |
37664607
|
| 2023 |
DAB2IP expression is regulated by cell confluency (cell contact). DAB2IP depletion in confluent cells alters cell morphology (reduced cell packing, increased stiffness), favors YAP/TAZ nuclear localization and transcriptional activity, while ectopic DAB2IP expression in subconfluent cells increases YAP/TAZ cytoplasmic retention. |
DAB2IP knockdown and overexpression, YAP/TAZ nuclear/cytoplasmic localization by immunofluorescence, atomic force microscopy for cell stiffness, confluency-dependent expression analysis |
Cancers |
Medium |
37444489
|
| 2023 |
DAB2IP is a bifunctional tumor suppressor in KRAS-mutant colorectal cancer: (1) it restrains wild-type H-RAS and N-RAS (required for robust RAS effector pathway activation even in KRAS-mutant tumors), and (2) its loss triggers production of inflammatory mediators and recruitment of protumorigenic macrophages in vivo. Tumor growth was suppressed by macrophage depletion or JAK/TBK1 inhibition in DAB2IP-depleted tumors. |
DAB2IP genetic loss in colorectal cancer models, Ras-GTP activation assay (H-/N-Ras), cytokine/inflammatory mediator profiling, macrophage depletion in vivo, JAK/TBK1 inhibitor treatment, histological analysis of tumor microenvironment |
Cancer Research |
Medium |
36939385
|
| 2024 |
A DAB2IP missense variant (p.D239N) in the C2 domain impairs its interaction with VEGFR2, altering the subcellular localization of VEGFR2: wild-type DAB2IP colocalizes with VEGFR2 intracellularly, while the D239N mutant retains VEGFR2 at the cell membrane. This implicates DAB2IP in regulating endothelial VEGF/VEGFR2 signaling and vascular permeability. |
Whole exome sequencing, protein structure modeling, subcellular localization assay (transfection + immunofluorescence colocalization of DAB2IP variant and VEGFR2), co-localization quantification |
The Journal of Allergy and Clinical Immunology |
Medium |
38823490
|
| 2024 |
DAB2IP inhibits glucose uptake under hypoxia by interacting with the E3 ubiquitin ligase STUB1 via its PER domain, facilitating STUB1-mediated ubiquitylation and degradation of HIF-1α. Deletion of the PER domain abolishes DAB2IP-mediated inhibition of glucose uptake, ATP production, and lactic acid production. |
Co-immunoprecipitation (DAB2IP-STUB1-HIF-1α), domain deletion mutagenesis (PER domain), HIF-1α ubiquitylation assay, glucose uptake assay, metabolic assays (ATP, lactate), in vitro and in vivo experiments |
Oncogenesis |
High |
38862467
|
| 2025 |
Nuclear DAB2IP localizes to the nucleus, where it interacts with the histone acetyltransferase HBO1 and enhances the HBO1-PLK1 interaction. DAB2IP facilitates PLK1-mediated phosphorylation of HBO1, which promotes HBO1-directed H3K14 acetylation, enabling MCM complex loading onto chromatin and supporting DNA replication origin firing. ATR regulates CDK1-mediated phosphorylation of DAB2IP, which is required for HBO1-PLK1 complex formation and activation. Loss of this phosphorylation increases genomic instability (anaphase bridges, 53BP1 nuclear bodies). |
Nuclear fractionation, co-immunoprecipitation (DAB2IP-HBO1, HBO1-PLK1), PLK1 kinase assay for HBO1 phosphorylation, ChIP for H3K14Ac at replication origins, MCM loading assay, CDK1 phosphorylation site mutagenesis, genomic instability assays (anaphase bridge/53BP1 quantification) |
Nucleic Acids Research |
High |
41261855
|