| 2004 |
Cathepsin L, via isoforms devoid of a signal peptide that localize to the nucleus during G1-S transition, proteolytically processes CDP/Cux (CUX1) to generate the p110 isoform, thereby regulating cell cycle progression. |
Ectopic expression of cathepsin L, Cat L(-/-) knockout cells, immunofluorescence imaging, activity-based probes for nuclear cathepsin L localization, in situ processing assay |
Molecular cell |
High |
15099520
|
| 2001 |
CDP/Cux (CUX1) DNA binding activity is up-regulated at G1/S transition by two events: dephosphorylation by Cdc25A phosphatase and proteolytic processing to generate the p110 isoform with stable DNA binding. |
Cell cycle synchronization, Western blot, EMSA, in vitro DNA binding assays |
Gene |
Medium |
11403998
|
| 2001 |
Cyclin A-Cdk1 binds CDP/Cux (CUX1) via the Cut homeodomain and a downstream Cy motif, and phosphorylates serines 1237 and 1270, thereby inhibiting CDP/Cux DNA binding activity in G2 and preventing repression of the p21(WAF1) promoter. |
In vitro kinase/binding assays, site-directed mutagenesis (S1237A/S1270A), co-immunoprecipitation, cotransfection reporter assays, cell synchronization |
The Journal of biological chemistry |
High |
11584018
|
| 2003 |
N-terminally truncated CDP/Cux isoforms (p110) act as transcriptional activators of the DNA polymerase alpha gene promoter in S phase, whereas full-length CDP/Cux does not; ChIP confirmed S-phase-specific promoter occupancy. |
Cotransfection reporter assays, retroviral expression, chromatin immunoprecipitation (ChIP), linker scanning analysis, in vitro DNA binding |
Molecular and cellular biology |
High |
12665598
|
| 2002 |
The CDP/Cux p75 isoform, generated by transcription initiation within intron 20, contains only Cut repeat 3 and the homeodomain, binds DNA stably, represses the p21 promoter, and activates the DNA polymerase alpha promoter; aberrant expression in breast tumor cells promotes undifferentiated growth. |
Northern/Western blot characterization, reporter assays (repression/activation), stable cell line experiments (collagen tubulogenesis assay) |
Cancer research |
Medium |
12438259
|
| 2006 |
A 90 kDa CDP/Cux isoform (p90) is generated by cathepsin L-mediated proteolytic processing, with its N-terminus between amino acids 918 and 938; p90 and p110 display similar DNA-binding and transcriptional activities. |
Deletion mutant mapping, co-expression with catalytically active cathepsin L isoforms lacking signal peptide, Western blot |
Biological chemistry |
Medium |
16972798
|
| 2008 |
CUX1 (p110 isoform) and E2F1 co-occupy the promoters of Ect2, MgcRacGAP, and MKLP1 upon S-phase entry and cooperatively activate their transcription; CHR elements mediate G1 repression, and CUX1/E2F1 binding drives peak G2/M expression to coordinate cytokinesis. |
Chromatin immunoprecipitation (ChIP), promoter-luciferase reporter assays, dominant-negative and activated transcription factor expression, siRNA knockdown, Western blot |
Molecular and cellular biology |
High |
19015243
|
| 2014 |
CUX1 functions as an ancillary factor in base excision repair by directly stimulating OGG1 enzymatic activity via its CUT domains, accelerating repair of 8-oxoG lesions; elevated CUX1 prevents RAS-induced senescence by reducing oxidative DNA damage. |
In vitro base excision repair assays with purified CUX1 and OGG1, single-cell gel electrophoresis (comet assay) in Cux1+/- MEFs and elevated-CUX1 cells, RAS-induced senescence assay, transgenic mouse model |
PLoS biology |
High |
24618719
|
| 2018 |
CUX1 CUT domains stimulate APE1 (apurinic/apyrimidinic endonuclease 1) enzymatic activity in vitro; CUX1 knockdown decreases APE1 activity in cell extracts and increases abasic sites, while CUX1 overexpression has the opposite effect, promoting resistance to temozolomide. |
In vitro DNA repair assay with purified CUT domains and APE1, cell extract APE1 activity assay, abasic site quantification, CUX1 knockdown/overexpression in glioblastoma cells, clonogenic survival |
Neuro-oncology |
High |
29036362
|
| 2017 |
A recombinant protein containing only two CUT domains of CUX1 is sufficient for rapid recruitment to DNA damage sites, acceleration of base excision repair, and increased cell survival following ionizing radiation. |
CUT domain truncation experiments, DNA damage recruitment assay, clonogenic survival assay, OGG1 inhibitor treatment |
Oncotarget |
Medium |
28147323
|
| 2021 |
CUX1 recruits the histone methyltransferase EHMT2 to DNA double-strand breaks, promoting downstream H3K9 and H3K27 methylation, phosphorylated ATM retention, γH2AX focus formation and propagation, and 53BP1 recruitment, thereby mediating epigenetically driven DNA repair in hematopoietic stem and progenitor cells. |
CUX1-deficient mouse HSPCs, mechanistic epistasis analysis, γH2AX foci, 53BP1 recruitment assays, ChIP for histone marks at DNA breaks |
Blood |
Medium |
34473231
|
| 2012 |
CUX1 (p110 isoform) modulates constitutive expression of ATM, ATR, and DNA damage response genes; CUX1 knockdown reduces ATM/ATR expression and impairs ATM autophosphorylation, Chk2/p53 phosphorylation, γH2AX and Rad51 foci, and DNA strand break repair after IR and UV. |
Genome-wide ChIP-chip (promoter arrays), RNAi knockdown, genetic inactivation, Western blot for phosphorylation markers, DNA damage foci immunofluorescence, clonogenic survival, cell cycle checkpoint analysis |
Nucleic acids research |
High |
22319212
|
| 2013 |
CUX1 directly transcriptionally represses PIK3IP1 (a PI3K inhibitor); CUX1 deficiency leads to increased PI3K-AKT signaling and enhanced tumor growth, validating CUX1 as a tumor suppressor via the PI3K pathway. |
Transcriptional reporter assays, ChIP, Drosophila cancer models, mouse transposon insertional mutagenesis, PI3K/AKT inhibitor treatment of CUX1-mutant tumors |
Nature genetics |
High |
24316979
|
| 2018 |
CUX1 knockdown in human CD34+ cells decreases expression of PIK3IP1 (PI3K inhibitor) and elevates PI3K/AKT signaling, promoting HSC exit from quiescence and proliferation leading to HSC exhaustion; restoration of CUX1 expression reverses MDS disease in mice. |
shRNA mouse models with graded CUX1 knockdown, bone marrow transplantation, RNA-sequencing, functional HSC quiescence assays, PI3K signaling pathway analysis |
Blood |
High |
29592892
|
| 2021 |
CUX1 directly represses the CFLAR (FLIP) promoter; CUX1 haploinsufficiency de-represses CFLAR, driving apoptosis evasion in AML cells. Genome-wide CRISPR/Cas9 screening identified CFLAR as a selective vulnerability in CUX1-deficient AML. |
Genome-wide CRISPR/Cas9 loss-of-function screen, CFLAR promoter ChIP and reporter assays, CUX1 knockdown/KO in murine and human AML cells, IAP antagonist treatment |
Nature communications |
High |
33931647
|
| 2022 |
CUX1 binds to an atherosclerosis-associated SNP (rs1537371) in the CDKN2A/B locus and regulates expression of p14ARF, p15INK4b, p16INK4a, and ANRIL in endothelial cells; CUX1 induction triggers p16INK4a-dependent replicative and stress-induced senescence. |
Electrophoretic mobility shift assay (EMSA) for SNP binding, reporter assays, CUX1 knockdown/overexpression, senescence assays (β-galactosidase, p16 expression) |
Nature aging |
Medium |
37117763
|
| 2013 |
CUX1 interacts with NF-κB p65 and recruits HDAC1 to chemokine promoters (e.g., CXCL10), reducing NF-κB p65 acetylation at K310 and repressing NF-κB-regulated cytokines in tumor-associated macrophages, thereby modulating M1 polarization. |
Co-immunoprecipitation, DNA pulldown, chromatin immunoprecipitation (ChIP), NF-κB reporter assay, CUX1 overexpression/knockdown in macrophages |
Oncogene |
Medium |
24336331
|
| 2020 |
CUX1 and NF-κB p65 co-mediate transcription of CXCL1, CXCL2, and CXCL3 from a unique CUX1-NF-κB binding motif in their promoters in synovial fibroblasts responding to TNF + IL-17A; CUX1 knockdown selectively abolishes this synergistic cytokine response. |
Gene-silencing transcriptomics, siRNA knockdown, promoter binding motif analysis, transcription factor independence assays (LIFR, STAT3, STAT4, ELF3 ruled out) |
Proceedings of the National Academy of Sciences of the United States of America |
Medium |
32079724
|
| 2010 |
CUX1 (p110 and p75 isoforms) stimulates cell migration and invasion; siRNA knockdown of CUX1 reduces motility. CUX1 activates Snail and Slug transcription factors and cooperates with them to repress E-cadherin and occludin, disrupting cell-cell junctions. ChIP-chip identified >20 direct CUX1 target genes involved in cytoskeleton remodeling and Rho GTPase regulation. |
siRNA knockdown migration/invasion assays, ectopic expression experiments, ChIP-chip (promoter arrays), reporter assays for Snail/Slug/E-cadherin/occludin |
Cell adhesion & migration |
Medium |
20224295
|
| 2010 |
CUX1 in neurons transcriptionally represses p27(Kip1) expression to regulate dendritic complexity; this effect requires the DNA-binding domains of CUX1 and is mediated downstream via RhoA. |
CUX1 overexpression and knockdown in cortical neurons, quantitative morphological analysis of dendrites, reporter assays, dominant-negative and activated RhoA epistasis experiments |
PloS one |
Medium |
20485671
|
| 2010 |
Cux1 and Cux2 regulate dendrite branching, spine development, and synapse formation in layer II-III cortical neurons partly through direct transcriptional regulation of chromatin remodeling genes Xlr3b and Xlr4b; knockout mice show reduced synaptic function and working memory deficits. |
Cux1/Cux2 knockout mice, shRNA knockdown, morphological analysis, electrophysiology, behavioral testing, gene expression analysis |
Neuron |
High |
20510857
|
| 2002 |
CDP/Cux C-terminus deletion (including the homeodomain) abolishes nuclear localization of the mutant protein and eliminates HiNF-D DNA binding activity in nuclear extracts; specific histone genes H4.1 and H1 containing CDP/Cux binding sites show reduced expression in homozygous mutant MEFs. |
Genetically targeted mouse (ΔC allele), indirect immunofluorescence, EMSA with nuclear extracts, Northern blot for histone genes |
Molecular and cellular biology |
Medium |
11839809
|
| 1999 |
Cux/CDP is the identity component of NF-muNR and represses the immunoglobulin heavy chain intronic enhancer (Emu) by antagonizing the Bright transcription activator at matrix attachment regions (MARs), both at the DNA binding and functional levels. |
Expression library screening, EMSA supershift with Cux/CDP antiserum, cotransfection reporter assays, affinity-purified NF-muNR Western blot |
Molecular and cellular biology |
Medium |
9858552
|
| 2009 |
Cux1 directly binds the p27(kip1) promoter in vivo and interacts with co-repressor Grg4 to enhance repression; ChIP assays show co-occupancy of Cux1, Grg4, HDAC1, and HDAC3 at two sites in the p27(kip1) promoter in newborn kidney tissue. |
Chromatin immunoprecipitation (ChIP) in kidney tissue, co-immunoprecipitation for Cux1-Grg4 interaction, promoter reporter (luciferase) assays, DNase I footprinting |
Gene |
High |
19332113
|
| 2008 |
Sustained expression of p75-Cux1 isoform in transgenic mice causes polycystic kidneys; chromatin affinity purification confirmed direct binding of Cux1 to c-myc and p27 promoters, with upregulation of c-myc and downregulation of p27, increased cilia length, and elevated epithelial proliferation. |
Transgenic mouse model, chromatin affinity purification (ChAP), Western blot, immunohistochemistry, proliferation index |
The Journal of biological chemistry |
Medium |
18356167
|
| 2004 |
SMAR1 and Cux/CDP physically interact with each other, co-localize in the perinuclear region, and independently repress the TCRbeta enhancer (Emu) via MARbeta; SMAR1 repressor activity is strongly enhanced in the presence of Cux/CDP. Overexpression of both proteins modulates chromatin structure at MARbeta as shown by DNase I hypersensitivity. |
Co-immunoprecipitation for SMAR1-Cux/CDP interaction, immunofluorescence colocalization, reporter gene cotransfection assays, DNase I hypersensitivity |
Nucleic acids research |
Medium |
15371550
|
| 1997 |
CDP/Cut (CUX1) binds to a silencer element in the lactoferrin promoter (identified as a ~180 kDa protein by UV cross-linking/EMSA) in non-LF-expressing hematopoietic cells; CDP/cut overexpression blocks lactoferrin expression upon granulocyte colony-stimulating factor-induced neutrophil maturation. |
Luciferase reporter transfections, EMSA, UV cross-linking, Western blot identification, overexpression in myeloid stem cells |
Blood |
Medium |
9326246
|
| 2020 |
Cathepsin L proteolytically processes CDP/Cux (CUX1) to produce the p110 isoform in gastric cancer; p110 then stably binds the VEGF-D promoter and activates VEGF-D transcription, promoting tumor angiogenesis. |
Western blot for p110 generation, co-immunoprecipitation of CTSL and CUX1, dual-luciferase reporter assay for VEGF-D promoter, endothelial tube formation/HUVEC migration, CAM assay |
Gastric cancer |
Medium |
32388635
|
| 2018 |
Ionizing radiation reduces GSK-3β activity via CTSL-mediated phosphorylation of Ser9; CTSL also processes CUX1 to the p110 isoform, which then promotes EMT and increases glioma cell migration and invasion. |
Western blot for GSK-3β phosphorylation, CTSL overexpression/knockdown, CUX1 processing assay, migration/invasion assays |
Cellular signalling |
Low |
29331585
|
| 2014 |
CUX1 and GLIS1 cooperate to stimulate TCF/β-catenin transcriptional activity and enhance cell migration and invasion; co-expression experiments in breast cancer model demonstrate their joint activation of Wnt pathway target genes. |
TCF/β-catenin reporter assay, co-expression experiments, Wnt inhibitor (FZD/LRP receptor inhibitors), laser-capture microdissection gene expression profiling |
Biology open |
Low |
25217618
|
| 1992 |
Clox (mammalian CUX1/CDP) proteins are nuclear DNA-binding proteins with sequence specificity similar to Drosophila Cut; cotransfection experiments demonstrate they function as repressors of tissue-specific gene transcription. |
cDNA cloning, Western blot, EMSA, cotransfection transcription repression assays |
Development (Cambridge, England) |
Medium |
1363085
|
| 2004 |
CUX1 in SVZ precursor cells shows nuclear localization in BrdU-positive dividing SVZ cells but weak diffuse localization in VZ cells, suggesting CUX1 function is first activated in SVZ intermediate progenitors. |
Immunofluorescence with anti-Cux-1 antibody, BrdU labeling, Pax-6 null mutation analysis |
The Journal of comparative neurology |
Low |
15452856
|
| 2004 |
Cux-1 is significantly upregulated downstream of constitutively active Notch 1 signaling in rat kidney epithelial cells, and Cux1 interacts with the Groucho homolog TLE-4 co-repressor (which is recruited by Notch effector proteins), linking CUX1 to the Notch pathway. |
Constitutively active Notch 1 overexpression in RKE cells, Western blot, co-immunoprecipitation of Cux1 with TLE-4 |
Developmental dynamics |
Low |
15499562
|
| 1997 |
Cux/CDP binds to the c-mos upstream enhancer site III via Cut repeat CR3 and the homeodomain (both required for efficient binding) and represses c-mos enhancer activity in cotransfection assays. |
GST-fusion protein pull-down with deletion mutants, EMSA supershift with anti-hCut antibodies, CAT reporter cotransfection assays |
Biochimica et biophysica acta |
Medium |
9130595
|