| 2003 |
Ajuba is an activator of Aurora-A kinase required for mitotic commitment: Ajuba and Aurora-A interact in mitotic cells and become phosphorylated; in vitro, Ajuba induces autophosphorylation and consequent activation of Aurora-A. Depletion of Ajuba prevented Aurora-A activation at centrosomes in late G2 phase and inhibited mitotic entry. |
Yeast two-hybrid screen (binding partner identification), co-immunoprecipitation, in vitro kinase assay, RNA interference in synchronized HeLa cells |
Cell |
High |
13678582
|
| 1999 |
Ajuba specifically associates with Grb2 through its N-terminal proline-rich pre-LIM domain interacting with either SH3 domain of Grb2; Ajuba augments MAP kinase activity in fibroblasts and promotes Xenopus oocyte meiotic maturation in a Grb2- and Ras-dependent manner. |
In vitro binding assay, co-immunoprecipitation in vivo, MAP kinase activity assay, Xenopus oocyte meiotic maturation assay |
Molecular and cellular biology |
High |
10330178
|
| 2000 |
Ajuba contains a functional nuclear export signal and shuttles into the nucleus; accumulation of Ajuba LIM domains in the nucleus of P19 embryonal cells causes growth inhibition and spontaneous endodermal differentiation. The differentiating effect maps to LIM domain 3, proliferation regulation to LIM domains 1 and 2. Ajuba-induced differentiation requires c-Jun kinase activation. |
Nuclear export signal mutagenesis, nuclear accumulation assay, cell proliferation and differentiation assays in P19 cells, c-Jun kinase activity assay |
Molecular biology of the cell |
Medium |
11029037
|
| 2002 |
Ajuba is recruited to cadherin-dependent cell-cell adhesive complexes in a regulated manner; Ajuba interacts with α-catenin at adherens junctions, α-catenin is required for efficient Ajuba recruitment to junctions, and Ajuba interacts directly with F-actin. Keratinocytes from Ajuba null mice show abnormal cell-cell junction formation and/or stability. |
Co-immunoprecipitation, immunofluorescence localization, knockout mouse keratinocytes, F-actin binding assay |
The Journal of biological chemistry |
High |
12417594
|
| 2002 |
Ajuba interacts with the amino terminus of the glial glutamate transporter GLT-1; Ajuba is coimmunoprecipitated with GLT-1 from brain and co-localizes with GLT-1 at the plasma membrane when co-expressed. Ajuba co-expression did not affect GLT-1 Km or Vmax for glutamate. |
Co-immunoprecipitation from brain tissue, co-expression in COS cells with co-localization |
Molecular and cellular neurosciences |
Medium |
11860269
|
| 2005 |
Ajuba promotes cell migration by localizing p130Cas to nascent focal complexes: Ajuba associates with the focal adhesion-targeting domain of p130Cas and is required for tyrosine phosphorylation of FAK, p130Cas, Crk, and Dock180 at nascent focal complexes. Rac activation is blunted in Ajuba null cells; Ajuba acts upstream of p130Cas for Rac activation. |
Ajuba null mouse embryonic fibroblast migration assay, co-immunoprecipitation, FRET-based Rac activation assay, rescue experiments |
The Journal of cell biology |
High |
15728191
|
| 2005 |
Ajuba regulates cellular PI(4,5)P2 levels by interacting with and activating PIPKIα (PI(4)P 5-kinase) activity while inhibiting PIPKIIβ. In Ajuba-null MEFs, PI(4,5)P2 levels are decreased with a corresponding increase in PI(4)P. Localization of PI(4,5)P2 synthesis to lamellipodia in migrating cells requires Ajuba. |
In vitro PIPKIα enzymatic activity assay with recombinant Ajuba, lipid phosphoinositide quantification in Ajuba-null MEFs, immunofluorescence localization |
Molecular and cellular biology |
High |
15870270
|
| 2005 |
Ajuba modulates IL-1-induced NF-κB activation by influencing the assembly and activity of the PKCζ/p62/TRAF6 signaling complex: Ajuba interacts with p62, TRAF6, and PKCζ; recruits TRAF6 to p62; activates PKCζ in vitro; and is a PKCζ substrate. Ajuba null MEFs are defective in NF-κB activation and IKK activity following IL-1 stimulation. |
Yeast two-hybrid screen, co-immunoprecipitation, in vitro PKCζ kinase assay, Ajuba null mouse embryonic fibroblasts NF-κB reporter assay |
Molecular and cellular biology |
High |
15870274
|
| 2006 |
Ajuba forms a complex with LATS2 during mitosis; LATS2 contributes to mitotic phosphorylation of Ajuba. Depletion of either LATS2 or Ajuba impairs centrosomal accumulation of γ-tubulin and spindle formation at the onset of mitosis. |
Yeast two-hybrid screening, co-immunoprecipitation, RNAi depletion, immunofluorescence of γ-tubulin at centrosomes |
FEBS letters |
Medium |
16413547
|
| 2007 |
Ajuba functions as a corepressor for SNAG domain-containing transcription factors (Snail, Gfi1): Ajuba interacts with the SNAG domain in vitro and in vivo, co-localizes with it, and enhances SNAG-mediated transcriptional repression. Chromatin immunoprecipitation shows SNAG-dependent assembly of a multiprotein repression complex including Ajuba at target promoters with histone modifications consistent with repression. |
Yeast two-hybrid, co-immunoprecipitation, integrated reporter gene assay, chromatin immunoprecipitation (ChIP), nucleocytoplasmic shuttling assay |
Cancer research |
High |
17909014
|
| 2007 |
Ajuba negatively regulates Wnt signaling by promoting GSK-3β-mediated phosphorylation of β-catenin: enforced Ajuba expression destabilizes β-catenin and suppresses Wnt target gene expression; Ajuba reinforces the association between β-catenin and GSK-3β. Wnt stimulation induces β-catenin accumulation and destabilization of Ajuba. |
Overexpression and knockdown in cells, co-immunoprecipitation, Western blot for β-catenin stability, luciferase reporter assay for Wnt target genes |
Oncogene |
Medium |
17621269
|
| 2008 |
Ajuba recruits PRMT5 to the SNAIL/AJUBA corepressor complex at the E-cadherin promoter: PRMT5 binds the non-LIM region of Ajuba, is translocated into the nucleus in a SNAIL- and AJUBA-dependent manner, and the ternary SNAIL/AJUBA/PRMT5 complex mediates arginine methylation of histones at the E-cadherin locus causing its repression. |
Co-immunoprecipitation, ChIP at E-cadherin promoter, histone arginine methylation assay, RNAi depletion, luciferase reporter assay |
Molecular and cellular biology |
High |
18347060
|
| 2008 |
Ajuba forms an endogenous complex with Gfi1 and HDAC and functions as a corepressor for Gfi1 autoregulation in a histone deacetylase-dependent manner: active HDAC activity co-immunoprecipitates with Ajuba or Gfi1; Ajuba LIM domains directly bind Gfi1; ChIP and reciprocal knockdown show selective Ajuba co-repressor function at Gfi1 target genes. |
Co-immunoprecipitation, gel filtration, HDAC activity assay, ChIP, reciprocal knockdown, reporter assay |
The Journal of biological chemistry |
High |
18805794
|
| 2009 |
Ajuba localizes to centrosomes and kinetochores during mitosis in a microtubule-dependent manner; Ajuba binds microtubules in vitro and follows nascent microtubules from centrosomes to kinetochores. Ajuba interacts with Aurora B and BUBR1 at kinetochores; BUBR1 siRNA disrupts chromosome alignment and modifies Ajuba localization due to premature mitotic exit. |
Immunofluorescence during mitosis, in vitro microtubule binding assay, microtubule regrowth assay, co-immunoprecipitation with Aurora B and BUBR1, siRNA knockdown |
Biology of the cell |
Medium |
18710370
|
| 2010 |
Ajuba LIM proteins (Ajuba, LIMD1, WTIP) are negative regulators of the Hippo pathway: in Drosophila, the single ortholog djub is required for normal epithelial organ size; epistasis places djub downstream of hpo. In mammalian and Drosophila cells, Ajuba LIM proteins/dJub interact with LATS/Warts and WW45/Sav to inhibit phosphorylation of YAP/Yki. |
Drosophila genetic knockout and RNAi, epistasis analysis (double mutant), co-immunoprecipitation in mammalian and Drosophila cells, YAP/Yki phosphorylation assay |
Current biology : CB |
High |
20303269
|
| 2010 |
Ajuba LIM proteins (LIMD1, Ajuba, WTIP) are required for miRNA-mediated but not siRNA-mediated gene silencing; they localize to P-bodies and bind Ago1/2, RCK, Dcp2, and eIF4E in vivo; they also bind the mRNA 5' m7GTP cap-protein complex, and their interaction with eIF4E prevents 4EBP1 and eIF4G interaction. |
Co-immunoprecipitation with Ago1/2, RCK, Dcp2, eIF4E; m7GTP cap pull-down; RNAi knockdown with miRNA reporter assay; P-body localization by immunofluorescence |
Proceedings of the National Academy of Sciences of the United States of America |
Medium |
20616046
|
| 2010 |
Ajuba functions as a nuclear receptor corepressor for a subset of nuclear hormone receptors: Ajuba selectively interacts with RARs and RXRs in a ligand-dependent manner through CoRNR-like motifs; simultaneous mutation of these motifs abolishes RAR binding and repression; Ajuba occupies RARE control elements in the absence of atRA and dissociates upon atRA stimulation; PRMT5 binding to Ajuba is mutually exclusive with RAR binding. |
Co-immunoprecipitation (ligand-dependent), mutagenesis of nuclear receptor interacting motifs, ChIP at endogenous RAR target genes, RARE reporter assay, RNAi depletion in P19 cells |
Proceedings of the National Academy of Sciences of the United States of America |
High |
20133701
|
| 2011 |
In Drosophila neuroblasts, Jub (Ajuba ortholog) is required to maintain Aurora-A at the centrosome but does not activate Aurora-A kinase activity itself; in jub mutants Aurora-A activity is unperturbed but Aurora-A recruitment/maintenance at the centrosome is lost, displacing active kinase from centrosomes and causing spindle defects. |
Drosophila jub genetic mutant analysis, immunofluorescence of Aurora-A localization and activity (phospho-T295), mitotic spindle phenotype quantification |
Journal of cell science |
Medium |
21402878
|
| 2011 |
Ajuba is required for Rac activation and maintenance of E-cadherin adhesion at cell junctions: Rac activation and actin accumulation at cadherin receptors is impaired in Ajuba-depleted cells. PAK1 directly phosphorylates Ajuba at Thr172; phosphomimetic Ajuba rescues PAK1-inhibition-induced junction defects. Ajuba binds Rac·GDP and Rac·GTP, with phosphorylated Ajuba preferentially interacting with active Rac; Ajuba modulates Rac dynamics at contacts. A Rac-PAK1-Ajuba feedback loop operates at cell-cell contacts. |
RNAi depletion, in vitro PAK1 kinase assay on Ajuba, phosphomimetic mutant rescue, Rac-GTP pull-down, live imaging of Rac dynamics at junctions |
The Journal of cell biology |
High |
22105346
|
| 2012 |
Ajuba binds Isl1 transcription factor and represses its transcriptional activity, is required for RA-dependent autorepression of Isl1 expression in the second heart field, and links retinoic acid signaling to Isl1 to restrict cardiac progenitor cell expansion in zebrafish. |
Co-immunoprecipitation (Ajuba-Isl1), transcriptional reporter assay, Ajuba morpholino knockdown in zebrafish, in situ hybridization of cardiac progenitor markers, RA signaling pathway epistasis |
Developmental cell |
Medium |
22771034
|
| 2013 |
EGFR-RAS-MAPK signaling promotes phosphorylation of Ajuba family proteins and enhances their binding to Warts/LATS and Salvador/WW45, linking EGFR signaling to Hippo pathway inhibition through Ajuba. In Drosophila, Jub is epistatic to EGFR and Ras for Yorkie regulation. |
Genetic epistasis in Drosophila (EGFR/Ras/jub double mutants), co-immunoprecipitation (MAPK-promoted binding), MAPK-dependent phosphorylation assay of Ajuba family proteins in mammalian cells |
Developmental cell |
High |
23484853
|
| 2013 |
JNK promotes phosphorylation of Ajuba family proteins and promotes binding of LIMD1 or WTIP to LATS1, linking JNK to Hippo pathway inhibition; in Drosophila, Jub is required for JNK-mediated Yorkie activation and wing regeneration after wounding. JNK promotes binding of LIMD1 and LATS1 through direct phosphorylation of LIMD1. |
Genetic epistasis in Drosophila (jub requirement for JNK-Yki axis), biochemical binding assay (co-immunoprecipitation with LATS1), in vitro JNK phosphorylation of LIMD1 |
Science signaling |
High |
24023255
|
| 2013 |
AJUBA suppresses YAP activity in malignant mesothelioma through LATS2: AJUBA transduction into MM cells suppresses YAP-target gene promoter activities, and this suppression is canceled by LATS2 knockdown, establishing AJUBA as a LATS2-dependent inhibitor of YAP in this cancer context. |
Lentiviral AJUBA transduction, promoter-reporter assay, siRNA knockdown of LATS2, YAP phosphorylation Western blot |
Oncogene |
Medium |
24336325
|
| 2013 |
Ajuba associates with the RPA complex and depletion of Ajuba leads to RPA phosphorylation, increased Chk1 phosphorylation, p53 induction, cell cycle delays, and cell death, placing Ajuba as a repressor of unscheduled ATR-mediated DNA damage response. |
Co-immunoprecipitation with RPA, RNAi depletion, Western blot for Chk1 and RPA phosphorylation, cell cycle analysis |
Frontiers in genetics |
Medium |
23755068
|
| 2014 |
Increasing cytoskeletal tension promotes Drosophila wing growth via a mechanism involving Ajuba (Jub)-dependent inhibition of Warts kinase: Jub associates with α-catenin at adherens junctions, and this association is promoted by cytoskeletal tension; Jub recruits Warts to junctions in a tension-dependent manner; genetic dependence on Jub links myosin activity to Yorkie regulation. |
Genetic epistasis (myosin/Jub/Warts double mutants in Drosophila), co-immunoprecipitation of Jub with α-catenin, in vivo imaging of Jub and Warts localization to junctions under tension, wing growth quantification |
Cell |
High |
24995985
|
| 2014 |
Ajuba activates Aurora-A through two distinct mechanisms: (1) the pre-LIM domain of Ajuba induces autophosphorylation of Aurora-A C-terminal kinase domain and is itself phosphorylated by it; (2) the LIM domain of Ajuba competitively binds to the N-terminal regulatory domain of Aurora-A, disrupting the inhibitory N-terminal/C-terminal intramolecular interaction. |
In vitro kinase assay with Ajuba domain truncations, co-immunoprecipitation of Ajuba LIM domain with Aurora-A N-terminal domain, competition binding assay |
Gene |
Medium |
24680704
|
| 2015 |
Ajuba promotes adipogenesis by functioning as an obligate co-activator of PPARγ: Ajuba binds the DNA-binding domain of PPARγ via its preLIM region in a ligand-independent manner, recruits p300/CBP via its LIM domain, and facilitates p300/CBP binding to PPARγ. The Ajuba/PPARγ/p300/CBP complex occupies PPARγ target promoters with increased histone acetylation. |
Co-immunoprecipitation (Ajuba-PPARγ, Ajuba-p300/CBP), domain mapping by truncation, ChIP at PPARγ target promoters, histone acetylation assay, 3T3-L1 adipogenesis assay with Ajuba KD/OE |
Cell death and differentiation |
High |
26113042
|
| 2016 |
AJUBA promotes colorectal cancer cell survival by binding the FERM domain of JAK1 to dissociate JAK1 from the IFNγ receptor, inhibiting STAT1 phosphorylation and nuclear translocation, thereby repressing the IFIT2 apoptosis inducer. |
Co-immunoprecipitation (AJUBA-JAK1 via FERM domain), Western blot for STAT1 phosphorylation, nuclear fractionation, IFIT2 reporter assay, RNAi knockdown |
Oncogene |
Medium |
27893714
|
| 2016 |
CDK1 phosphorylates Ajuba at Ser119 and Ser175 during G2/M phase of the cell cycle; mitotic phosphorylation of Ajuba promotes cell proliferation and anchorage-independent growth in vitro and tumorigenesis in vivo but does not affect Hippo signaling activity. |
In vitro CDK1 kinase assay with Ajuba, site-directed mutagenesis (S119A/S175A), cell cycle synchronization, in vivo xenograft tumorigenesis assay |
The Journal of biological chemistry |
High |
27226586
|
| 2016 |
AJUBA LIM proteins limit Hippo pathway activity in proliferating mammalian epithelial cells by sequestering a cytosolic Hippo kinase complex in which LATS kinase is inhibited; at the plasma membranes of growth-arrested cells, AJUBA LIM proteins do not associate with or inhibit the Hippo kinase complex. AJUBA LIM proteins did not influence YAP activity in response to mechanical signals. |
Co-immunoprecipitation of AJUBA with LATS in cytosolic fraction, subcellular fractionation, YAP phosphorylation/localization assay in proliferating vs. arrested cells, Drosophila wing growth epistasis |
Molecular and cellular biology |
Medium |
27457617
|
| 2018 |
The force-sensitive localization of Ajuba to adherens junctions during epithelial morphogenesis requires its N-terminal domain and two of three LIM domains; Ajuba localizes to sites of myosin accumulation within seconds; Ajuba stabilizes adherens junctions in regions of high tension and is required to maintain cell adhesion during cell rearrangement. |
Live imaging of GFP-Ajuba in Drosophila embryos during axis elongation, domain truncation/mutation analysis of localization, tension perturbation (myosin inhibition/activation), cell-cell adhesion assay |
The Journal of cell biology |
Medium |
30006462
|
| 2018 |
Ajuba stability in HCC cells is regulated by the E3 ligase Hakai: Hakai interacts with Ajuba via its HYB domain and induces Ajuba neddylation (not ubiquitin-proteasome degradation); neddylation inhibitor MLN4924 but not proteasome inhibitor MG132 antagonizes Hakai-induced Ajuba modification. |
Co-immunoprecipitation (Hakai-Ajuba via HYB domain), neddylation assay, pharmacological inhibitors (MLN4924, MG132), lentiviral KD/OE |
Journal of experimental & clinical cancer research : CR |
Medium |
30041665
|
| 2018 |
Ajuba directly interacts with RPA70 subunit of the RPA complex in a cell cycle-regulated manner; the Ajuba-RPA70 interaction is reduced upon DNA replication stress; Ajuba negatively regulates ATR pathway by directly interacting with RPA70 to prevent inappropriate ATR activation. |
Co-immunoprecipitation, direct protein binding assay (Ajuba-RPA70), cell cycle synchronization, DNA damage stress assay |
Scientific reports |
Medium |
29934626
|
| 2019 |
Ajuba binds the C-terminus of SP1 transcription factor and functions as a co-activator to enhance SP1 target gene expression; Ajuba is itself a target gene of SP1, forming a feed-forward loop. Ajuba and SP1 co-occupy SP1-responsive promoters as demonstrated by ChIP. |
Co-immunoprecipitation, GST pull-down, ChIP at SP1 target promoters, luciferase reporter assay |
Journal of experimental & clinical cancer research : CR |
Medium |
31101117
|
| 2019 |
α-Catenin is the mechanotransducer responsible for tension-dependent recruitment of Jub (Drosophila Ajuba) to adherens junctions: a specific region of α-catenin associates with Jub, and deletion of a region of α-catenin allows constitutive tension-independent Jub recruitment; increased Jub recruitment to α-catenin increases Yorkie activity and wing growth independently of increased cytoskeletal tension. |
Co-immunoprecipitation (α-catenin-Jub), domain deletion mutants of α-catenin, in vivo Drosophila wing growth assay, Yorkie reporter assay |
Journal of cell science |
Medium |
30659113
|
| 2021 |
Ajuba is required for PINK1-dependent mitophagy signaling: ZIKV NS5 antagonizes mitophagy by binding Ajuba and preventing its translocation to depolarized mitochondria where it is required for PINK1 activation; mitophagy suppression by NS5-Ajuba binding amplifies pro-inflammatory chemokine production through PKR sensing of mitochondrial RNA. Ajuba-/- mice show enhanced ZIKV dissemination to tissues. |
Co-immunoprecipitation (ZIKV NS5-Ajuba), live-cell imaging of Ajuba translocation to mitochondria, mitophagy assay, Ajuba knockout mouse ZIKV infection model, PKR signaling assay |
Cell reports |
High |
34706234
|
| 2021 |
SQSTM1/p62 inhibits Ajuba-induced NF-κB activation in a UBA domain-dependent manner; p62 co-expression reduces nuclear Ajuba localization in unstressed cells; Ajuba is degraded by autophagy but co-expression with p62 (wild type or UBA-deficient) protects Ajuba levels. |
Co-expression reporter assay for NF-κB, subcellular fractionation, autophagy inhibitor assays, Western blot for Ajuba degradation |
PloS one |
Medium |
34735553
|
| 2021 |
Ajuba functions as a co-activator of C/EBPβ during adipogenesis: Ajuba interacts with C/EBPβ and recruits CBP to facilitate C/EBPβ binding to promoters of PPARγ and C/EBPα, increasing H3 histone acetylation and target gene expression. |
Co-immunoprecipitation (Ajuba-C/EBPβ-CBP), ChIP at PPARγ/C/EBPα promoters, histone acetylation assay, 3T3-L1 differentiation assay with Ajuba KD/OE |
Molecular and cellular endocrinology |
Medium |
34619292
|
| 2022 |
Distinct LIM domains of Drosophila Jub mediate binding to different partners: LIM2 is specifically required for binding to Warts in co-immunoprecipitation and for wing growth/Yorkie regulation in vivo (along with LIM1); LIM2 and LIM3 are required for regulation of cell shape and Steppke binding; multiple regions of Jub contribute to α-catenin binding and junctional localization. |
LIM domain deletion constructs in Drosophila, co-immunoprecipitation of Jub variants with Warts and Steppke in cultured cells, in vivo wing growth assay, Yorkie activity reporter, cell shape quantification |
PloS one |
Medium |
35969522
|
| 2023 |
Ajuba is required for slit diaphragm formation and function in nephrocytes: Djub (Drosophila Ajuba homolog) recruits Warts (LATS2 homolog) to the slit diaphragm; Djub knockdown activates the Hippo pathway; Hippo activation reciprocally reduces Djub levels, suggesting a self-amplifying feedback loop. Loss of Djub or Hippo activation causes actin cytoskeleton rearrangement and increased SD permeability. |
Drosophila nephrocyte genetics, RNAi knockdown, co-immunoprecipitation/localization of Djub and Warts at slit diaphragm, functional permeability assay, in vivo epistasis (Warts KD/Yki overexpression rescue) |
Journal of the American Society of Nephrology : JASN |
Medium |
36930055
|
| 2023 |
Ajuba is part of a complex with PRMT5 and Aurora-A that shapes the crescent-like Golgi ribbon via modification of HURP: mutual activation of PRMT5 and Aurora-A within the Ajuba/PRMT5/Aurora-A complex leads to arginine methylation then phosphorylation of HURP at p725, which organizes Golgi assembly factors to shape the crescent Golgi ribbon. |
Co-immunoprecipitation of Ajuba-PRMT5-Aurora-A complex, in vitro kinase/methyltransferase assays, site-directed mutagenesis of HURP phosphorylation site (725A), knockdown-rescue experiment, immunofluorescence of Golgi morphology |
Cell communication and signaling : CCS |
Medium |
37370099
|
| 2023 |
Ajuba forms a complex with p53 and MDM2 to promote proteasomal degradation of p53; AJUBA overexpression decreases p53 levels without affecting p53 transcription; AJUBA expression is induced by chemotherapeutic drugs in a p53-dependent manner, creating a negative feedback loop. |
Co-immunoprecipitation (Ajuba-p53-MDM2 complex), Western blot for p53 protein and mRNA (RT-PCR), pharmacological rescue, RNAi knockdown of AJUBA |
Molecular oncology |
Medium |
36931700
|
| 2024 |
USP7 deubiquitinase interacts with Ajuba and stabilizes it; USP7 knockdown or treatment with USP7 inhibitor FT671 substantially reduces Ajuba protein levels. Both USP7 and Ajuba knockdown reduce cell-cell adhesion in colorectal cancer cells. |
Co-immunoprecipitation (USP7-Ajuba), quantitative proteomics after inducible USP7 knockdown (LC-MS/MS), pharmacological inhibitor (FT671), cell-cell adhesion assay |
Molecular & cellular proteomics : MCP |
Medium |
39522755
|
| 2025 |
GSK3β phosphorylates Ajuba at serine 163 within a conserved degron motif (TS163GIS), which mediates interaction with the WD40 domain of β-TrCP E3 ubiquitin ligase (SCFβ-TrCP), leading to ubiquitination and proteasomal degradation of Ajuba. The S163A mutant significantly attenuates Ajuba ubiquitination. |
In vitro GSK3β kinase assay on Ajuba, co-immunoprecipitation (Ajuba-β-TrCP via WD40 domain), site-directed mutagenesis (S163A), ubiquitination assay |
Neoplasia (New York, N.Y.) |
Medium |
40367710
|
| 2025 |
Jub (Drosophila Ajuba) promotes phosphorylation of the N-terminal intrinsically disordered region of Warts/LATS, and these N-terminal phosphorylation sites influence Wts recruitment into biomolecular condensates and Wts activity. Jub itself forms condensates that recruit Wts. Minibrain and Homeodomain-interacting protein kinase are identified as kinases promoting Wts N-terminal phosphorylation and modulating condensate recruitment. |
Condensate formation assay (live imaging of Jub and Wts condensates), phosphorylation assay of Wts N-terminal IDR, mutagenesis of N-terminal phosphorylation sites, genetic epistasis in Drosophila, kinase identification by genetics |
Cell reports |
Medium |
41351836
|
| 2017 |
Ajuba interacts with Twist transcription factor via its LIM domain (Twist box is required); Ajuba functions as an obligate co-activator of Twist to enhance N-cadherin transcription; Ajuba recruits CBP and Twist to form a ternary complex at the N-cadherin promoter E-box with concomitant histone acetylation. |
Co-immunoprecipitation (Ajuba-Twist), domain mutagenesis, luciferase reporter assay, ChIP at N-cadherin promoter, histone acetylation assay |
Journal of cellular and molecular medicine |
Medium |
34173718
|
| 2025 |
APC loss stabilizes Ajuba protein through GSK-3 dysregulation (independent of β-catenin); stabilized Ajuba acts as a positive regulator of YAP, driving a fetal intestinal transcriptional program that is mutually exclusive with β-catenin-driven transcription, contributing to bistable tumor-initiating states. |
APC knockout intestinal organoids vs. β-CATENIN activation mutants, Ajuba protein stability assay under GSK-3 inhibition, YAP transcriptional reporter, epistasis (APC-Ajuba-YAP pathway), single-cell transcriptomics |
bioRxivpreprint |
Low |
bio_10.1101_2025.03.06.641686
|
| 2010 |
In medaka, Ajuba localizes to basal bodies of cilia in growth-arrested cells and is essential for ciliogenesis in Kupffer's vesicle cells; Ajuba knockdown results in randomized left-right organ asymmetry and altered expression of left-right body axis determination genes, establishing a role in vertebrate ciliogenesis. |
Medaka Ajuba knockdown (morpholino), immunofluorescence of Ajuba at basal bodies, ciliogenesis assay in Kupffer's vesicle cells, in situ hybridization of laterality markers |
Biochemical and biophysical research communications |
Medium |
20457130
|
| 2017 |
Ajuba suppresses CdGAP (a Rac1/Cdc42 GAP) activity at epithelial cell-cell contacts: Ajuba interacts with CdGAP via distinct domains from those used for Rac1 binding; Ajuba binding inhibits CdGAP GAP activity; CdGAP recruitment to junctions does not require Ajuba, but Ajuba controls CdGAP residence at contacts. |
Co-immunoprecipitation (Ajuba-CdGAP), in vitro GAP activity assay, immunofluorescence of CdGAP/Ajuba localization, domain mapping |
Scientific reports |
Medium |
28835688
|
| 2022 |
Over-expression of AJUBA or WTIP in MCF10A cells displaces LIMD1 from adherens junctions (competitive binding) and reduces LATS1 junctional localization, associated with increased YAP1 phosphorylation and decreased nuclear YAP1, suggesting AJUBA and WTIP have activities distinct from LIMD1 in Hippo regulation at junctions. |
Overexpression of AJUBA/WTIP, immunofluorescence of LIMD1 and LATS1 junctional localization, YAP1 phosphorylation and nuclear localization Western blot/imaging |
microPublication biology |
Low |
36439396
|