| 2002 |
PATJ (hINADL) interacts with human Crumbs3 (CRB3) through the CRB3 C-terminal end binding to the N-terminal domain of PATJ, and localizes to tight junctions and apical plasma membrane in human intestinal epithelial cells; overexpression of PATJ disrupted ZO-1 and ZO-3 tight junction localization. |
Co-immunoprecipitation, overexpression/dominant-negative experiment, immunofluorescence localization in Caco-2 cells |
The Journal of biological chemistry |
High |
11964389
|
| 2005 |
PATJ is targeted to the apical region and tight junctions upon initiation of cell polarization; RNAi-mediated reduction of PATJ delays tight junction formation and causes cell polarity defects, which are reversed by PATJ reintroduction, establishing PATJ as a functional polarity protein in mammalian epithelial cells. |
RNAi knockdown, rescue by reintroduction, immunofluorescence, tight junction formation assay in MDCK cells |
The Journal of cell biology |
High |
15738264
|
| 2005 |
PATJ knockdown in Caco2 cells causes Pals1 to dissociate from tight junctions, Crumbs3 to accumulate in an early endosome-related compartment near the apical membrane, and mislocalization of occludin and ZO-3 to the lateral membrane, demonstrating that PATJ connects and stabilizes apical and lateral components of tight junctions. |
Stable shRNA knockdown, immunofluorescence, subcellular fractionation in Caco2 cells |
Journal of cell science |
High |
16129888
|
| 2005 |
The L27 domain of PATJ forms a heterodimeric complex with the L27N domain of Pals1, assembling into a tetrameric structure (two heterodimer units); the C-terminal alpha-helix of each L27 domain is a critical specificity determinant for partner selection. |
NMR solution structure determination, biochemical binding assays, site-directed analysis of L27 domain complexes |
Proceedings of the National Academy of Sciences of the United States of America |
High |
15863617
|
| 2007 |
PATJ is required for directional migration of epithelial cells; PATJ RNAi in MDCKII cells disrupts localization of aPKC and Par3 to the leading edge and disorganizes the microtubule-organizing center orientation during wound-induced migration. |
RNAi knockdown, wound-induced migration assay, immunofluorescence of aPKC/Par3 at leading edge, MTOC orientation analysis |
EMBO reports |
High |
17235357
|
| 2007 |
HPV16 and HPV18 E6 proteins bind PATJ through E6's C-terminal PDZ-binding motif and target PATJ for degradation; additionally, the alternatively spliced 18 E6* isoform (lacking a C-terminal PDZ-binding motif) also associates with and degrades PATJ independently, and 18 E6-mediated PATJ degradation is not inhibited by shRNA silencing of E6AP. |
Co-immunoprecipitation, protein degradation assays, shRNA silencing of E6AP, isoform comparison experiments in epithelial cells |
Journal of virology |
High |
17287269
|
| 2008 |
PATJ (and its paralogue Mupp1) forms a ternary complex with angiomotin (Amot) and the RhoA GEF Syx; this Amot:Patj/Mupp1:Syx complex controls spatial targeting of RhoA activity to lamellipodia in migrating endothelial cells. |
Peptide pull-down, yeast two-hybrid screening, FRET analysis of RhoA activity in lamellipodia, morpholino knockdown in zebrafish |
Blood |
High |
18824598
|
| 1998 |
CIPP (PATJ/INADL) selectively binds via its PDZ domains to Kir4.1 and Kir4.2 inward rectifier K+ channels, NMDA receptor subunits, neurexins, and neuroligins; co-expression of CIPP with Kir4.1 in COS-7 cells doubles Kir4.1 current density. |
Yeast two-hybrid, GST pull-down, whole-cell voltage clamp electrophysiology in COS-7 cells |
Molecular and cellular neurosciences |
High |
9647694
|
| 2002 |
CIPP (PATJ/INADL) PDZ4 domain interacts with ASIC3 C-terminal region; co-expression of CIPP with ASIC3 in COS cells increases ASIC3 peak current density 5-fold and slightly shifts pH0.5 from 6.2 to 6.4, consistent with enhanced surface expression of ASIC3. |
Yeast two-hybrid, co-immunoprecipitation, whole-cell patch-clamp electrophysiology in COS cells, in situ hybridization |
The Journal of biological chemistry |
High |
11872753
|
| 2001 |
The seven PDZ domains of human INADL (PATJ) each have distinct binding specificities for C-terminal peptide ligands, falling into class I, class II, and a novel class IV (characterized by an acidic residue at the C-terminal position); site-directed mutagenesis of contact residues confirmed involvement of specific pocket residues in binding preference. |
Combinatorial phage-display peptide library screening, homology modeling, site-directed mutagenesis |
The Journal of biological chemistry |
High |
11509564
|
| 2009 |
PATJ shares binding partners with MUPP1 including JAM1, ZO-3, Pals1, Par6, and nectins, and uses overlapping mechanisms for tight junction localization; however, unlike MUPP1, PATJ is indispensable for tight junction establishment and epithelial polarization, with Pals1 showing higher affinity for PATJ than MUPP1, and Pals1-mediated activation of the Par6-aPKC complex being critical for PATJ function. |
Co-immunoprecipitation, binding affinity comparison, RNAi knockdown of PATJ vs MUPP1, immunofluorescence |
Molecular and cellular biology |
High |
19255144
|
| 2009 |
PATJ physically interacts with nephrocystin-1 (NPHP1) and nephrocystin-4 (NPHP4) and co-localizes with them in human renal tubules; knockdown of NPHP1 or NPHP4 phenocopies loss of PALS1/Par3, producing tight junction formation defects similar to those seen with PATJ/PALS1 depletion. |
Co-immunoprecipitation, shRNA knockdown in MDCK cells, immunofluorescence, 3D collagen matrix culture |
Human molecular genetics |
Medium |
19755384
|
| 2012 |
Drosophila PATJ directly binds the Myosin-binding subunit (MBS) of Myosin phosphatase and decreases Myosin dephosphorylation, resulting in activated (phosphorylated) Myosin; this supports stability of the Zonula Adherens, and loss of PATJ leads sequentially to Myosin loss from AJ, AJ disassembly, and loss of apical-basal polarity. |
Direct binding assay (pull-down), Myosin phosphorylation assays, PATJ mutant analysis in Drosophila epithelium, immunofluorescence |
The Journal of cell biology |
High |
23128243
|
| 2012 |
In Drosophila, the first PDZ domain of Patj together with its Stardust-binding (L27) domain are sufficient to fully rescue viability and Crumbs localization in null Patj mutants; Patj null mutants are lethal but Patj is dispensable for ectoderm polarity while being required in follicular epithelium where it supports Crumbs complex apical localization. Gain-of-function of Crumbs and Patj mutation genetically suppress each other in follicular cells. |
Generation of null Drosophila Patj mutants, domain truncation rescue experiments, genetic epistasis (Crumbs gain-of-function × Patj mutant), immunofluorescence |
Development (Cambridge, England) |
High |
23136386
|
| 2012 |
Crystal structure of the L27(PATJ)-(L27N,L27C)(Pals1)-L27(MALS2) heterotrimer reveals two cognate pairs of heterodimeric L27 domains that assemble mutually independently; biochemical data confirm this independent assembly mode also applies to DLG1/CASK/Mals2. |
X-ray crystallography (2.05 Å resolution), biochemical binding assays |
The Journal of biological chemistry |
High |
22337881
|
| 2013 |
MUPP-1 levels inversely regulate PATJ protein levels by controlling stability of the PATJ/PALS-1 complex; upon MUPP-1 depletion, increased PATJ localizes at the migrating front and recruits more PAR3, indicating at least two distinct pools of PALS-1 complexes (PALS-1/MUPP-1 and PALS-1/PATJ) co-exist in epithelial cells. |
siRNA depletion, co-immunoprecipitation, immunofluorescence, western blotting in MCF10A cells |
Experimental cell research |
Medium |
23880463
|
| 2010 |
CIPP (PATJ/INADL) forms a tripartite complex with IRSp53 and Cypin in neuronal cells; CIPP acts as a bridge linking the C-termini of IRSp53 and Cypin via its PDZ domains, and IRSp53 connects to Cypin via an SH3-mediated interaction requiring two positively charged Cypin residues; the three proteins co-localize at the tips of neuronal protrusions. |
Co-immunoprecipitation in cultured cells, domain mapping with PDZ domains, SH3-domain interaction mutagenesis, co-localization by immunofluorescence in neuronal cells |
Biological chemistry |
Medium |
20707603
|
| 2009 |
CIPP (PATJ/INADL) PDZ2 directly binds IRSp53 C-terminus; co-transfection of CIPP with IRSp53 in mammalian cells induces reorganization of CIPP into large punctate multi-protein assemblies that are not cytoplasmic vesicles. |
GST pull-down with individual PDZ domains, co-transfection/co-localization, endocytic marker co-staining |
The Biochemical journal |
Medium |
19138174
|
| 2023 |
PATJ knockout in epithelial cells causes tight junction defects, disturbed apical-basal polarity, and impaired lumen formation in 3D cysts; mechanistically, PATJ associates with and inhibits HDAC7, and HDAC7 inhibition/knockdown rescues the polarity and lumen phenotypes; PATJ-mediated regulation of HDAC7 controls expression of genes involved in cell junction assembly and membrane organization; this HDAC7-regulatory function is independent of Pals1 binding. |
CRISPR-Cas9 knockout, 3D cyst assay, co-immunoprecipitation (PATJ-HDAC7), HDAC7 inhibitor/siRNA rescue, RNA-seq gene expression analysis |
Cellular and molecular life sciences : CMLS |
High |
37878054
|
| 2023 |
In mouse preimplantation embryos, PATJ and MPDZ together are required for blastocyst formation and trophectoderm lineage specification; double depletion disrupts the apical CRB and PAR polarity complexes, tight junctions, and actin filaments in outer cells, leading to ectopic Hippo signaling activation, reduced YAP nuclear localization, suppressed Cdx2 expression, and failure of trophectoderm differentiation. |
Zygote microinjection of RNAi constructs, immunofluorescence for polarity/junction markers, Hippo pathway readouts (YAP phosphorylation/localization), transcription factor expression analysis |
Reproduction (Cambridge, England) |
Medium |
37318097
|
| 2021 |
CIPP (PATJ/INADL) interacts via its PDZ domains with the C-terminal PDZ-binding motif of the serotonin 5-HT2B receptor; co-expression of CIPP increases 5-HT2B receptor clustering at neuronal surfaces, prevents receptor dispersion after agonist stimulation, and potentiates inositol phosphate production and calcium mobilization; CIPP, 5-HT2B, and NMDA receptor NR1 subunit form a macromolecular complex. |
Peptide affinity chromatography/mass spectrometry, co-immunoprecipitation in COS-7 cells, IP measurement, calcium imaging, immunofluorescence in hippocampal neurons |
ACS chemical neuroscience |
Medium |
33739808
|
| 2025 |
PATJ knockout in HEK293 cells alters YAP1 nuclear translocation, and PATJ deletion causes transcriptional reprogramming including dysregulation of vascular/stress-response genes (RUNX1, HEY1, NUPR1, HK2); in C. elegans, the PATJ homolog mpz-1 is upregulated under hypoxia and its knockdown causes abnormal neuronal morphology and increased mortality exacerbated by hypoxia. |
CRISPR-Cas9 knockout, YAP1 nuclear translocation assay, RNA-seq, C. elegans mpz-1 knockdown/hypoxia experiments |
Redox biology |
Medium |
40472775
|
| 2025 |
PATJ conditional knockout in T cells impairs immunological synapse (IS) formation and T cell activation in vitro and in vivo; PATJ expression increases rapidly upon T cell activation; a specific minimal PDZ domain combination within PATJ is sufficient to support TCR signaling and, when engineered into a CAR construct, enhances CAR-T cell cytotoxicity against solid tumors. |
Conditional T cell-specific Patj knockout mice, confocal microscopy of IS formation, in vitro/in vivo T cell activation assays, PATJ truncation domain mapping, CAR-T cell cytotoxicity assay |
Journal for immunotherapy of cancer |
Medium |
40341028
|
| 2025 |
PatJ (PATJ) is required for lumen initiation in MDCK-II cells; PatJ controls the architecture of the apical-lateral border and connects the tight junction to the apical cortex, and its loss impairs fusion of vacuolar apical compartments (VACs) at the apical membrane initiation site (AMIS) to generate a nascent lumen. |
Quantitative light and electron microscopy, proximity proteomics (BioID), loss-of-function experiments in MDCK-II cells, apical cargo trafficking assays |
bioRxivpreprint |
Medium |
|
| 2025 |
PATJ zebrafish knockout (via homozygous truncating PATJ variant c.830delC validated in patient and zebrafish model) produces a ciliopathy phenotype including polycystic kidney disease and hydrocephalus, demonstrating an essential role for PATJ in cilia formation and function. |
Massively parallel sequencing (patient), zebrafish in vivo loss-of-function validation, ciliopathy phenotype characterization |
HGG advances |
Medium |
40931526
|