| 1998 |
TRIP6 protein displays a proline-rich N-terminal region linked to three tandemly arrayed C-terminal LIM domains, placing it in the same structural family as zyxin and LPP; it was first identified as a ligand-dependent binding partner for the thyroid hormone receptor. |
cDNA cloning, sequence analysis, yeast two-hybrid |
Genomics |
Medium |
9598321
|
| 1999 |
TRIP6/ZRP-1 directly interacts with the second PDZ domain of the cytosolic protein tyrosine phosphatase hPTP1E (ZRP-1/TRIP6 LIM domains and intact C-terminus required); interaction demonstrated both in vitro with bacterially expressed proteins and in vivo by co-immunoprecipitation. |
Yeast two-hybrid, in vitro binding with bacterially expressed proteins, co-immunoprecipitation, deletion analysis |
The Journal of biological chemistry |
High |
10400701
|
| 1999 |
Full-length Trip6 localizes to focal adhesion plaques; deletion of the N-terminal 115 amino acids allows Trip6 to enter the nucleus. A GAL4 fusion containing the Trip6 LIM domain region activates transcription in yeast and chicken fibroblasts. |
Overexpression in chicken embryo fibroblasts, fluorescence microscopy, deletion mutagenesis, GAL4 reporter assay |
Gene |
Medium |
10395914
|
| 1999 |
Trip6 LIM domain sequences act as a coactivator for transcriptional activation by v-Rel: GAL4-Trip6 activates transcription in yeast and chicken cells, Trip6 enables C-terminal v-Rel sequences to activate transcription, and Trip6 enhances v-Rel activation from a κB site reporter. |
Yeast two-hybrid, GAL4 reporter assay, NF-κB reporter assay |
Gene expression |
Medium |
10794523
|
| 2000 |
TRIP6 interacts with the PDZ domain of the adaptor protein RIL (second LIM domain of TRIP6 is sufficient for strong interaction) and with the second PDZ domain of PTP-BL (requiring the third LIM domain and intact C-terminus). TRIP6 co-precipitates with RIL and PTP-BL PDZ polypeptides in transfected epithelial cells and co-localizes with RIL at F-actin structures. |
Yeast two-hybrid, co-immunoprecipitation, deletion analysis, co-localization by fluorescence microscopy |
European journal of cell biology |
Medium |
10826496
|
| 2001 |
TRIP6 contains a functional nuclear export signal (NES) dependent on CRM1: leptomycin B treatment sequesters TRIP6 in the nucleus; NES mutation also retains TRIP6 in the nucleus; the Trip6 NES redirects the nuclear v-Rel oncoprotein to the cytoplasm. TRIP6 also harbors at least two nuclear targeting sequences and multiple transactivation domains, but does not bind DNA-cellulose. |
Leptomycin B treatment, NES mutagenesis, nuclear localization sequence fusion to β-galactosidase, GAL4-reporter assays, DNA-cellulose binding assay |
Biochimica et biophysica acta |
High |
11336797
|
| 2003 |
TRIP6 directly binds to the carboxyl-terminal tail of the LPA2 receptor through its LIM domains; LPA stimulation promotes TRIP6 interaction with the LPA2 receptor, recruits TRIP6 to the plasma membrane and focal adhesions, and induces agonist-dependent association with paxillin, FAK, c-Src, and p130cas. Overexpression of TRIP6 augments LPA-induced cell migration; siRNA-mediated knockdown reduces it. This interaction is specific to LPA2 and not LPA1 or LPA3. |
Co-immunoprecipitation, pulldown, siRNA knockdown, cell migration assay, fluorescence microscopy |
The Journal of biological chemistry |
High |
14688263
|
| 2004 |
TRIP6 functions as a coactivator for both AP-1 and NF-κB; a nuclear isoform of TRIP6 (nTrip6) is recruited to AP-1/NF-κB target gene promoters as shown by chromatin immunoprecipitation. In the presence of glucocorticoids, GR joins the Trip6 complex at these promoters, mediating GR tethering-based transrepression. RNAi knockdown of Trip6 or dominant-negative mutation abolishing GR interaction eliminates GR transrepression. |
Chromatin immunoprecipitation, RNAi knockdown, dominant-negative mutagenesis, reporter assays |
Genes & development |
High |
15489293
|
| 2004 |
TRIP6/ZRP-1 interacts with the cytoplasmic domain of endoglin through its three C-terminal LIM domains. In the absence of endoglin, ZRP-1 localizes to focal adhesions; in the presence of endoglin, ZRP-1 redistributes along actin stress fibers. Endoglin expression causes dramatic reorganization of the actin cytoskeleton from dense F-actin bundles to stress fibers, and siRNA knockdown of endoglin or ZRP-1 or endoglin clustering leads to F-actin mislocalization. |
Yeast two-hybrid (bait: endoglin cytoplasmic domain), co-immunoprecipitation, deletion mapping, siRNA knockdown, fluorescence microscopy |
The Journal of biological chemistry |
High |
15148318
|
| 2005 |
c-Src phosphorylates TRIP6 at Tyr-55 upon LPA stimulation; this phosphorylation is absent in Src-null fibroblasts. Phosphotyrosine-55 together with Pro-58 creates a docking site for Crk SH2 domain. Y55F mutation abolishes Crk and p130cas association and significantly reduces LPA-induced ERK activation and cell migration without affecting TRIP6 focal adhesion localization. |
In vitro kinase assay, phospho-specific antibodies, site-directed mutagenesis (Y55F), co-immunoprecipitation, ERK phosphorylation assay, cell migration assay |
Molecular and cellular biology |
High |
15988003
|
| 2005 |
TRIP6 is a RIP2-interacting protein; the LIM domains of TRIP6 mediate binding to RIP2. TRIP6 interacts with RIP2 in a TNF- or IL-1-dependent manner in mammalian cells. Overexpression of TRIP6 potentiates RIP2-mediated NF-κB activation; dominant-negative or siRNA of TRIP6 inhibits NF-κB activation by TNF, IL-1, TLR2, or Nod1. TRIP6 also interacts with TRAF2 and potentiates RIP2- and Nod1-mediated ERK activation. |
Yeast two-hybrid, co-immunoprecipitation, NF-κB reporter assay, siRNA, dominant-negative overexpression |
Journal of cell science |
High |
15657077
|
| 2006 |
Supervillin binds the LIM domains of TRIP6 (and LPP but not zyxin) through a defined sequence (SV342-571). SV and TRIP6 co-localize within large focal adhesions. RNAi reduction of either protein increases cell adhesion to fibronectin. TRIP6 partially rescues SV effects on stress fibers and FAs by mislocalizing SV away from FAs. |
Pulldown, co-immunoprecipitation, co-localization by fluorescence microscopy, RNAi knockdown, fibronectin adhesion assay |
The Journal of cell biology |
High |
16880273
|
| 2006 |
AMPK phosphorylates TRIP6 in vitro at its N-terminus; the catalytic subunit AMPKα2 physically interacts with TRIP6 in mammalian cells. AMPK action enhances the transcriptional co-activator properties of TRIP6. |
Yeast two-hybrid, co-immunoprecipitation, in vitro phosphorylation assay, transcriptional reporter assay |
Cellular signalling |
Medium |
16624523
|
| 2007 |
PTPL1/FAP-1 dephosphorylates phosphotyrosine-55 of TRIP6 in vitro and inhibits LPA-induced tyrosine phosphorylation of TRIP6 in cells. PTPL1-mediated dephosphorylation requires direct PTPL1–TRIP6 protein–protein interaction and PTPL1 phosphatase activity. PTPL1 prevents TRIP6 turnover at adhesion sites and inhibits LPA-induced TRIP6–Crk association and cell migration. |
In vitro phosphatase assay, co-immunoprecipitation, dominant-negative/phosphatase-dead mutants, cell migration assay, FRAP |
The Journal of biological chemistry |
High |
17591779
|
| 2007 |
ZRP-1/TRIP6 is essential for stress fiber formation, mature focal adhesion assembly, and correct cell-cell adhesion. ZRP-1 depletion reduces FAK tyrosine phosphorylation and elevates Rac1 activity, causing abnormal actin polymerization and membrane protrusions; RhoA overexpression rescues stress fibers in ZRP-1-depleted cells. |
siRNA knockdown, fluorescence microscopy, focal adhesion quantification, FAK phosphorylation immunoblot, Rac1 activity assay, RhoA rescue experiment |
Journal of cell science |
High |
17652164
|
| 2008 |
TRIP6 directly interacts with the fifth PDZ domain of MAGI-1b scaffold; this interaction is mediated by the C-terminal PDZ-binding motif of TRIP6. Ectopic TRIP6 expression induces cell invasion in a PI3K- and NF-κB-dependent manner and impairs cell–cell aggregation at least partly by uncoupling adherens junctions from the cytoskeleton. TRIP6Stop473 (lacking PDZ-binding motif) cannot promote invasion or interfere with cell aggregation. |
Yeast two-hybrid, co-immunoprecipitation, invasion assay, aggregation assay, PDZ-binding mutant (TRIP6Stop473), PI3K/NF-κB inhibitors |
FASEB journal |
High |
19017743
|
| 2008 |
nTrip6 LIM domains interact selectively with Fos family members (not Jun or ATF2), making nTrip6 a selective coactivator for Fos-containing AP-1 dimers. GR transrepression (via nTrip6 tethering) is restricted to Fos-containing AP-1 dimers; c-Jun:ATF2-driven promoters do not recruit nTrip6 or GR. |
Co-immunoprecipitation, chromatin immunoprecipitation, reporter assays with defined AP-1 dimer composition |
Molecular endocrinology |
High |
18535250
|
| 2010 |
TRIP6 interacts with the cytoplasmic juxtamembrane domain of Fas receptor and interferes with FADD recruitment to Fas, thereby antagonizing Fas-induced apoptosis. TRIP6 also physically interacts with NF-κB p65 and promotes NF-κB nuclear translocation upon Fas activation or LPA stimulation. TRIP6 promotes Fas-mediated cell migration in apoptosis-resistant cells via Src-dependent pTyr-55 phosphorylation. |
Co-immunoprecipitation, FADD recruitment assay, apoptosis assay, NF-κB reporter/translocation assay, site-directed mutagenesis (Y55F), cell migration assay |
Molecular and cellular biology |
High |
20876301
|
| 2010 |
TRIP6 associates with POT1, TRF2, and TIN2 (components of the shelterin complex) by co-immunoprecipitation and is detected at telomeres by ChIP. TRIP6 depletion by siRNA induces telomere dysfunction-induced foci (TIFs), indicating a role in telomere protection. |
Yeast two-hybrid, co-immunoprecipitation, chromatin immunoprecipitation, siRNA knockdown, TIF assay |
Aging |
Medium |
20634563
|
| 2010 |
c-Src-mediated phosphorylation of TRIP6 at Tyr-55 is required for its localization to the osteoclast sealing zone and for osteoclast bone resorptive capacity. TRIP6 resides in the sealing zone through association with tropomyosin 4. LPA promotes TRIP6 sealing zone association and bone resorption via the LPA2 receptor. |
RNAi knockdown, overexpression of phosphomimetic (Y55E) and non-phosphorylatable (Y55A/Y55F) TRIP6 mutants, sealing zone perimeter measurement, bone resorption assay, co-immunoprecipitation (with tropomyosin 4), receptor agonist/antagonist pharmacology |
The Journal of biological chemistry |
High |
20547766
|
| 2010 |
nTrip6 is recruited to GR-bound promoters through direct interaction with GR and increases GR-mediated transcription. nTrip6 is also essential for transrepression of GR by NF-κB and AP-1: the interaction of nTrip6 with NF-κB and AP-1 at a GR-bound promoter is required for repression. |
Chromatin immunoprecipitation, co-immunoprecipitation, reporter assays, siRNA |
Molecular and cellular endocrinology |
Medium |
20153803
|
| 2011 |
TRIP6 and LPP (but not Zyxin) localize to a subset of telomeres by immunofluorescence and are found in complex with shelterin; Zyxin, despite high similarity, is not detected at telomeres or in a complex with shelterin. |
Immunofluorescence, co-immunoprecipitation, comparison among LIM protein family members |
Cell cycle |
Medium |
21519191
|
| 2013 |
TRIP6 promotes tumorigenesis by serving as a bridge to recruit p27KIP1 to AKT in the cytosol, facilitating AKT-mediated phosphorylation of p27KIP1 at T157 and its cytosolic mislocalization. TRIP6 also regulates AKT membrane translocation and activation, and promotes serum-induced reduction of nuclear p27KIP1 via Skp2-dependent and -independent mechanisms. |
Co-immunoprecipitation, AKT kinase assay, phospho-specific antibody for p27T157, subcellular fractionation, siRNA knockdown, xenograft tumor model |
Molecular and cellular biology |
High |
23339869
|
| 2015 |
Trip6 promotes dendritic morphogenesis in hippocampal neurons through interaction with GRIP1 and myosin VI. Phosphorylation of GRIP1 at T956 by AKT1 inhibits GRIP1–myosin VI interaction but promotes GRIP1 binding to 14-3-3, regulating F-actin organization and dendritic morphogenesis. Trip6 depletion reduces F-actin content and impairs dendritic morphology, phenocopying GRIP1 or myosin VI knockdown. |
Co-immunoprecipitation, siRNA knockdown, phospho-mutant analysis, F-actin staining, dendritic morphology quantification in cultured hippocampal neurons |
The Journal of neuroscience |
Medium |
25673849
|
| 2016 |
TRIP6 directly binds TRAF6 and recruits it to the LPA2 receptor upon LPA stimulation. TRIP6 antagonizes recruitment of deubiquitinases A20 and CYLD to TRAF6, sustaining TRAF6 E3 ligase activity and augmenting LPA-induced NF-κB and JNK signaling. TRAF6 in turn facilitates TRIP6 binding to NF-κB p65 and c-Src-mediated TRIP6 phosphorylation. TRIP6 shRNA or Cas9/sgRNA depletion enhances A20/CYLD–TRAF6 association and attenuates NF-κB/JNK/p38 activation. |
Co-immunoprecipitation, shRNA, CRISPR/Cas9 knockout, NF-κB/JNK reporter assays, deubiquitinase competition assay |
Cell discovery |
High |
27134758
|
| 2017 |
TRIP6 inhibits Hippo signaling at adherens junctions in response to mechanical tension: vinculin (activated by tension) recruits TRIP6 to adherens junctions, where TRIP6 binds LATS1/2 and competes with MOB1 for LATS1/2 binding, thereby blocking MST1/2-mediated LATS1/2 activation and promoting YAP activity. |
siRNA knockdown, co-immunoprecipitation, competitive binding assay (TRIP6 vs MOB1 for LATS1/2), tension manipulation, YAP reporter assay |
EMBO reports |
High |
29222344
|
| 2019 |
TTPAL directly binds TRIP6 in the cytoplasm (identified by co-IP/mass spectrometry) and inhibits ubiquitin-mediated degradation of TRIP6. Stabilized TRIP6 displaces β-catenin from MAGI1 via competitive binding, allowing β-catenin nuclear entry and activation of Wnt/β-catenin signaling. |
Co-immunoprecipitation followed by mass spectrometry, ubiquitination assay, competitive binding assay, β-catenin localization/reporter assay, siRNA depletion of TRIP6 |
Cancer research |
High |
31018940
|
| 2021 |
TRIP6 is required for LIMD1 localization to adherens junctions (but not vice versa), for recruitment of vinculin and VASP to adherens junctions, and for maintenance of apical F-actin and myosin organization. TRIP6 knockdown causes loss of apical actin stress fibers and compensatory increase at basal focal adhesions. |
siRNA knockdown, fluorescence microscopy, quantification of LIMD1/vinculin/VASP/myosin/F-actin localization |
Journal of cell science |
Medium |
33558314
|
| 2021 |
TRIP6 deletion in mice causes ependymal and choroid plexus epithelial cells to carry fewer and shorter cilia, leading to hydrocephalus. TRIP6 localizes at the pericentriolar material and along the ciliary axoneme (super-resolution microscopy). TRIP6 homodimerization is required for its ciliogenesis function; inhibition of homodimerization in vitro phenocopies Trip6 deletion. |
Mouse knockout, super-resolution microscopy, RNAi in choroid plexus epithelial cell line, homodimerization inhibition |
Nature communications |
High |
34620853
|
| 2022 |
TRIP6 binds TRAF6 and enhances TRAF6 oligomerization and autoubiquitination in vivo, leading to NF-κB activation and pro-inflammatory cytokine (TNFα, IL-6) expression. TRIP6-knockout mice develop less severe DSS-induced colitis compared to wild-type, confirming in vivo role. |
TRIP6-knockout mouse model (DSS colitis), co-immunoprecipitation, TRAF6 oligomerization/autoubiquitination assay, NF-κB signaling assay, cytokine measurement |
Journal of inflammation |
High |
34983535
|
| 2023 |
TRIP6 directly interacts with the PDZ domain-containing polarity protein PARD3 to disrupt tight junctions and activate oncogenic Akt signaling, promoting CRC metastasis. TRIP6-induced pro-metastatic phenotypes and Akt activation depend on PARD3; TRIP6 also inhibits PTEN in this context. |
Co-immunoprecipitation, tight junction marker quantification, gut permeability assay, siRNA/shRNA knockdown, in vivo mouse metastasis model, nanoparticle-encapsulated siRNA therapeutic experiment |
Cancer letters |
Medium |
37827326
|
| 2023 |
TRIM55 directly interacts with TRIP6, regulates TRIP6 protein stability by influencing its ubiquitination, and thereby activates Wnt/β-catenin signaling to promote HCC cell proliferation. |
Co-immunoprecipitation, cycloheximide chase, ubiquitination assay, Wnt reporter, xenograft model |
Journal of hepatocellular carcinoma |
Medium |
37554583
|
| 2024 |
The three LIM domains of TRIP6 are necessary and sufficient for tension-dependent localization to adherens junctions. TRIP6 and LIMD1 LIM domains bind strained/tensioned F-actin; point mutations in a conserved residue in each LIM domain that impairs strained F-actin binding abolishes localization to adherens junctions and ability to bind/recruit LATS1. TRIP6 co-localizes with ends of actin fibers at adherens junctions. |
Domain deletion analysis, LIM domain point mutagenesis, strained F-actin binding assay, fluorescence microscopy, tension manipulation, co-immunoprecipitation (TRIP6–LATS1) |
Cytoskeleton |
High |
38426816
|
| 2024 |
The TRIP6/LATS1 complex co-localizes with α-catenin/vinculin at both bicellular and tricellular junctions; this junctional localization requires ROCK1 and α-catenin and is sensitive to cytochalasin B, Y-27632, and blebbistatin, indicating mechanosensitive localization. A BiFC-based α-catenin/vinculin mechanosensor co-localizes with TRIP6/LATS1. |
Immunofluorescence, pharmacological perturbation (cytochalasin B, Y-27632, blebbistatin), siRNA knockdown of ROCK1/α-catenin, BiFC mechanosensor |
European journal of cell biology |
Medium |
38805800
|
| 2024 |
TRIP6 recruits protein phosphatase PP1A to dephosphorylate LATS1/2, thereby inducing YAP nuclear localization and activation in postnatal neural stem cells. This TRIP6-YAP axis promotes NSC self-renewal and inhibits differentiation; YAP in turn regulates Gli2 expression to activate Sonic Hedgehog signaling. |
Co-immunoprecipitation (TRIP6–PP1A), LATS1/2 phosphorylation assay, YAP reporter/immunofluorescence, siRNA knockdown, Gli2 reporter, conditional YAP knockout in mice |
FASEB journal |
Medium |
38411462
|
| 2025 |
TRIP6 binds to and stabilizes the transcription factor c-Fos (verified by co-IP and silver staining); c-Fos then acts as a transcription factor to upregulate GPX4 expression (verified by dual-luciferase reporter), thereby inhibiting ferroptosis in gastric cancer cells. |
Co-immunoprecipitation, silver staining, dual-luciferase reporter assay for GPX4 promoter, ferroptosis inducer/inhibitor rescue experiments |
Journal of gastrointestinal oncology |
Medium |
40672107
|