| 2003 |
CBX7 interacts with Ring1 and localizes to nuclear Polycomb bodies, functioning as a PRC1 component to repress the Ink4a/Arf locus and extend cellular lifespan; shRNA ablation of CBX7 induced growth arrest via induction of Ink4a/Arf. |
Co-immunoprecipitation (Ring1 interaction), immunofluorescence (nuclear Polycomb body localization), shRNA knockdown with p16/Arf induction readout, cDNA screen for senescence bypass |
Nature cell biology |
High |
14647293
|
| 2010 |
CBX7 within PRC1 binds directly to the noncoding RNA ANRIL via its chromodomain; in concert with H3K27me3 recognition, RNA binding is required for CBX7-mediated repression of the INK4b/ARF/INK4a locus. Structure-guided analysis revealed the molecular interplay between noncoding RNA and H3K27me3 as mediated by the conserved chromodomain. |
RNA immunoprecipitation, NMR structural analysis of chromodomain–RNA interaction, chromodomain mutants disrupting RNA or H3K27me binding, ChIP at INK4a/ARF locus, senescence assays |
Molecular cell |
High |
20541999
|
| 2005 |
CBX7 represses p16INK4a and p14ARF expression in normal and tumor-derived prostate cells; shRNA knockdown upregulates both p16 and p14ARF and impairs cell growth in a manner dependent on the p16/Rb and p14ARF/p53 pathway status. |
shRNA knockdown, Western blot for p16/p14ARF, growth assays in LNCaP and PC-3 cells |
Oncogene |
Medium |
15897876
|
| 2007 |
CBX7 represses the Ink4a/Arf locus and acts epistatically to the Arf-p53 pathway during lymphomagenesis in vivo; transgenic targeting of Cbx7 to the lymphoid compartment initiated T cell lymphomagenesis and cooperated with c-Myc to produce B cell lymphomas. |
Transgenic mouse model (lymphoid-targeted Cbx7 expression), genetic epistasis with Arf-p53 pathway, tumor characterization |
Proceedings of the National Academy of Sciences of the United States of America |
High |
17374722
|
| 2009 |
CBX7 (PRC1 component) physically associates with DNA methyltransferase (DNMT) enzymes; CBX7 can initiate stable repression and promoter DNA hypermethylation of cancer-silenced genes in embryonal carcinoma cells, and DNMTs are assembled at CBX7 target gene promoters. |
Co-immunoprecipitation (CBX7–DNMT interaction), ChIP (DNMT assembly at CBX7 target promoters), CBX7 knockdown/sustained expression in EC cells, epigenomic analysis |
Cancer research |
Medium |
19602592
|
| 2010 |
CBX7 recruits the H3K9 methyltransferase SUV39H2 to the p16 promoter, initiating H3K9me3 formation; chromodomain mutations or Pc-box deletion abolished CBX7 binding and H3K9me3 formation; CBX7–SUV39H2 complexes were detected in the nucleus by bimolecular fluorescence complementation. |
ChIP (CBX7, SUV39H2, H3K9me3 at p16 locus), BiFC (CBX7–SUV39H2 nuclear complex), chromodomain/Pc-box mutants, siRNA knockdown of Suv39h2 |
PloS one |
Medium |
21060834
|
| 2012 |
CBX7 is necessary for recruitment of Ring1B to chromatin in ESCs; Cbx7-containing PRC1 complexes primarily control early-lineage commitment whereas RYBP-containing PRC1 complexes regulate metabolism and cell-cycle progression. Cbx7 is the primary Polycomb ortholog of PRC1 in ESCs and directly represses Cbx2, Cbx4, and Cbx8. |
ChIP-seq (genomic localization), Cbx7 knockdown (Ring1B chromatin recruitment), reporter assays, ESC differentiation assays |
Cell reports |
High |
22226354 23273917
|
| 2012 |
Cbx7 knockout mice develop liver and lung adenomas and carcinomas; Cbx7 null MEFs show increased proliferation and reduced senescence; CBX7 binds the CCNE1 (cyclin E) promoter in a complex containing HDAC2 and negatively regulates CCNE1 expression. |
Cbx7 knockout mouse generation, ChIP (CBX7 and HDAC2 at CCNE1 promoter), Western blot, MEF proliferation/senescence assays, human tumor tissue correlation |
The Journal of clinical investigation |
High |
22214847
|
| 2013 |
MAPK signaling phosphorylates Cbx7 at Thr-118 (near the Polycomb box); a site-specific antibody confirms this phosphorylation in mammary carcinoma cells blocked by MEK inhibitors; upon EGF stimulation, phosphorylated Cbx7 interacts more robustly with other PRC1 members; Thr-118 phosphorylation moderately enhances repression of the p16 target gene in RAS-induced senescence. |
Mass spectrometry identification of phosphorylation site, site-specific antibody generation, MEK inhibitor treatment, EGF stimulation + Co-IP with PRC1 members, p16 repression assay with phosphomimetic mutant |
The Journal of biological chemistry |
Medium |
24194518
|
| 2014 |
CBX7 inhibits Wnt/β-catenin signaling in breast epithelial cells by enhancing transcription of DKK-1 (a Wnt antagonist) through cooperation with p300 acetyltransferase and increased histone acetylation at the DKK-1 promoter; DKK-1 pharmacological inhibition in CBX7-overexpressing cells rescues Wnt signaling and the CD44+/CD24-/ESA+ stem-like cell population. |
ChIP (CBX7 and p300 at DKK-1 promoter, histone acetylation), shRNA knockdown and overexpression, pharmacological DKK-1 inhibition, stem-cell population assays |
FASEB journal |
Medium |
25351982
|
| 2014 |
CBX7 negatively or positively regulates several cancer-relevant genes (e.g., SPP1/osteopontin repressed; FOS/FOSB/EGR1 activated) by interacting with their promoter regions and modulating transcriptional activity, as shown by ChIP and gene expression profiling after CBX7 restoration. |
Gene expression profiling after CBX7 restoration, ChIP at gene promoters, qRT-PCR correlation in human thyroid and lung carcinoma tissues |
PloS one |
Medium |
24865347
|
| 2015 |
Crystal structures of CBX7 chromodomain with small-molecule inhibitors reveal the binding modes; inhibitors compete with H3K27me3 peptide binding through interactions with key residues in the methyl-lysine binding aromatic cage; lead compound MS37452 displaces CBX7 from the INK4A/ARF locus and derepresses p16/CDKN2A transcription in prostate cancer cells. |
X-ray crystallography of CBX7ChD–inhibitor complexes, fluorescence polarization binding assays, ChIP (CBX7 displacement from INK4A/ARF locus), gene expression assays in PC3 cells |
Chemistry & biology |
High |
25660273
|
| 2016 |
By live-cell single-molecule tracking, Cbx7 requires co-recognition of both H3K27me3 and DNA for chromatin targeting; the chromodomain (CD) and AT-hook-like (ATL) motif constitute a functional DNA-binding unit; H3K27me3 contributes significantly to Cbx7 and Cbx8 chromatin targeting but less to Cbx2, Cbx4, Cbx6; disruption of PRC1 complex formation facilitates Cbx7 chromatin targeting. |
Live-cell single-molecule tracking (SMT), CRISPR genetic engineering of H3K27me3 pathway, biochemical DNA-binding assays, Cbx7 CD and ATL mutants |
eLife |
High |
27723458
|
| 2016 |
Structure-guided discovery of Class B antagonist MS351, which inhibits H3K27me3 binding when CBX7ChD is bound to RNA; crystal structure of CBX7ChD/MS351 reveals ligand recognition by aromatic cage residues; MS351 induces derepression of CBX7 target genes including p16 in mESCs and PC3 cells. |
X-ray crystallography of CBX7ChD/MS351 complex, fluorescence polarization assays, gene expression assays (p16 derepression in mESC and PC3) |
ACS medicinal chemistry letters |
High |
27326334
|
| 2017 |
dCLIP reveals that CBX7 predominantly binds 3' UTRs of mRNAs with a median footprint of ~171–183 nucleotides; four families of consensus RNA motifs were identified and their mutation abolishes CBX7 binding in vitro; antisense oligonucleotide intervention paradoxically increases CBX7 binding and enhances gene expression. |
Denaturing CLIP (dCLIP) in mouse and human cells, bioinformatic motif analysis, in vitro RNA binding with motif-mutant constructs, antisense oligonucleotide pharmacological intervention |
Cell systems |
High |
29073373
|
| 2017 |
CBX7 positively regulates miR-155 expression in MEFs and colon carcinomas, and miR-155 in turn targets KRAS protein levels; Cbx7-null MEFs show downregulation of miR-155 and corresponding upregulation of KRAS protein. |
miRNA microarray of Cbx7-null vs. WT MEFs, qRT-PCR validation, miR-155 transfection with Western blot for KRAS, human colon carcinoma tissue correlation |
BMC cancer |
Medium |
28259135
|
| 2018 |
CBX7 represses YAP/TAZ-dependent transcription in glioblastoma; CBX7 overexpression represses CTGF (a YAP/TAZ target) and reduces phospho-JNK; CBX7 fails to inhibit glioma cell migration when CTGF is exogenously overexpressed or constitutively active JNK is present, placing CBX7 upstream of the YAP/TAZ-CTGF-JNK axis. |
Exogenous CBX7 overexpression, GSEA of CBX7-regulated genes identifying YAP/TAZ targets, Western blot (CTGF, p-JNK), genetic rescue experiments (CTGF OE, CA-JNK), migration assays |
Scientific reports |
Medium |
27291091
|
| 2019 |
CBX7 interacts with non-histone proteins bearing trimethylated lysine peptide motifs similar to H3K27me3: the H3K9 methyltransferases SETDB1, EHMT1, and EHMT2 were identified as CBX7-binding proteins by mass spectrometry; depletion of SETDB1 in AML cells phenocopied CBX7 repression. |
Mass spectrometry of CBX7-associated proteins, Co-IP validation, SETDB1 knockdown phenocopy assay in AML cells, xenotransplantation of CBX7-overexpressing HSPCs |
Cell reports |
Medium |
30759399
|
| 2019 |
A positive allosteric modulator (PAM) peptidomimetic UNC4976 simultaneously antagonizes H3K27me3-specific recruitment of CBX7 to target genes while increasing non-specific DNA/RNA binding, re-equilibrating PRC1 away from H3K27me3 target regions; this was demonstrated across three orthogonal cellular assays. |
Quantitative cellular CBX7 chromodomain assay, ChIP (target gene displacement), fluorescence polarization, cellular reporter assays |
Cell chemical biology |
Medium |
31422906
|
| 2020 |
CBX7 binds directly to the E-box element to preclude TWIST-1 from binding its E-box in secondary ovarian cancer cells; deletion of CBX7 reactivates TWIST-1-induced transcription and promotes mesenchymal transformation and enhanced tumorigenicity in vivo. |
CBX7 deletion (CRISPR/genetic), reporter assays for TWIST-1 transcriptional activity at E-box, in vivo tumorigenicity assays |
Oncogene |
Medium |
32205869
|
| 2020 |
The two CBX7 isoforms p36CBX7 and p22CBX7 exhibit distinct subcellular localization and opposing proliferative functions: p36CBX7 localizes to the nucleus and is expressed in proliferating cells, while p22CBX7 localizes to the cytoplasm, is induced by serum starvation, and inhibits cell proliferation. |
Isoform identification by molecular cloning, subcellular fractionation, immunofluorescence, serum starvation experiments, proliferation assays |
Scientific reports |
Medium |
32415167
|
| 2021 |
CBX7 transcriptionally suppresses AKR1B10 in a PRC1-dependent manner (identified by RNA-seq and ChIP); AKR1B10 downregulation by CBX7 inactivates ERK signaling, establishing a CBX7/AKR1B10/ERK signaling axis in urinary bladder cancer. |
RNA-seq after CBX7 manipulation, ChIP assay at AKR1B10 locus, siRNA knockdown of AKR1B10, ERK signaling Western blot, xenograft tumor models |
Cell death & disease |
Medium |
34035231
|
| 2021 |
CBX7 transcriptionally suppresses PDE4B at the transcription level in a PRC1-dependent manner in bladder cancer cells, as demonstrated by ChIP and luciferase assays. |
ChIP (CBX7 at PDE4B promoter), luciferase reporter assay, CBX7 knockdown/overexpression with PDE4B expression readout |
Frontiers in cell and developmental biology |
Medium |
34977026
|
| 2022 |
RNF26 promotes ubiquitin-mediated proteasomal degradation of CBX7 in clear cell renal cell carcinoma; RNF26 knockdown reduces CBX7 ubiquitination, stabilizes CBX7 protein, and inhibits tumor growth, establishing RNF26 as a CBX7 E3 ubiquitin ligase. |
Co-IP (RNF26–CBX7 interaction), ubiquitination assay, cycloheximide chase (protein stability), RNF26 KD/OE with CBX7 protein level readout, xenograft models |
International journal of biological sciences |
Medium |
35342353
|
| 2022 |
EZH2 represses CBX7 expression by increasing H3K27me3 at the CBX7 promoter in bladder cancer cells; CBX7 in turn directly downregulates FGFR3 expression (shown by ChIP-qPCR) and sensitizes bladder cancer cells to cisplatin by inactivating PI3K-AKT signaling. |
ChIP-qPCR (H3K27me3 at CBX7 promoter; CBX7 at FGFR3 promoter), RT-qPCR, Western blot, CCK-8 cisplatin sensitivity assay, xenograft mouse model |
British journal of cancer |
Medium |
36396821
|
| 2022 |
CBX7 downregulates POU2F2 expression, which indirectly represses PD-L1 in bladder cancer cells; depletion of CBX7 results in resistance to PD-1 blockade, establishing a CBX7/POU2F2/PD-L1 regulatory axis. |
RNA-seq (CBX7 KD, GSE185630), Western blot/RT-qPCR (POU2F2, PD-L1), PD-1 blockade functional assay |
Biochemical and biophysical research communications |
Low |
35526483
|
| 2022 |
Circ_0006790 facilitates nuclear translocation of CBX7; nuclear CBX7 increases DNA methylation of S100A11 by recruiting DNA methyltransferases to its promoter, thereby inhibiting S100A11 transcription and suppressing PDAC immune escape. |
RNA pull-down and RIP (circ_6790–CBX7 interaction), subcellular fractionation (CBX7 nuclear translocation), ChIP (DNMT recruitment to S100A11 promoter), siRNA knockdowns, xenograft assays |
American journal of cancer research |
Medium |
35693076
|
| 2023 |
CBX7 interacts with TARDBP (TDP-43) and positively regulates its downstream target RBM38 in a TARDBP-dependent manner; this CBX7–TARDBP–RBM38 axis drives cardiomyocyte cell cycle exit postnatally, and Cbx7 genetic inactivation promotes cardiomyocyte proliferation and cardiac regeneration after injury. |
Co-immunoprecipitation + mass spectrometry (CBX7–TARDBP interaction), conditional and inducible cardiac-specific KO mice, adenoviral CBX7 overexpression, immunostaining for proliferation markers, neonatal apical resection and adult MI models |
Circulation |
High |
37158107
|
| 2024 |
CBX7 transcriptionally inhibits USP44 expression; reduced USP44 promotes proteasome-dependent degradation of c-MYC protein, consequently attenuating c-MYC-mediated transactivation of LDHA and inhibiting glycolysis in meningioma cells. |
iTRAQ proteomics after CBX7 restoration, ChIP (CBX7 at USP44 promoter), luciferase reporter assay, Western blot (c-MYC stability), proteasome inhibitor experiments, xenograft mouse models |
Journal of molecular cell biology |
Medium |
37791390
|
| 2024 |
CBX7 blocks Twist1 binding to the EphA2 promoter and inhibits EphA2 expression; loss of CBX7 allows Twist1 to transactivate EphA2, promoting BLBC metastasis via the Twist1/EphA2 axis. |
ChIP assay (Twist1 at EphA2 promoter with/without CBX7), dual-luciferase reporter assay, Western blot, in vitro migration/invasion assays |
Translational oncology |
Low |
35843065
|
| 2024 |
RNF2 promotes ubiquitination and proteasomal degradation of CBX7 in chondrosarcoma; RNF2 knockdown reduces CBX7 ubiquitination and increases CBX7 protein stability (cycloheximide chase), without affecting CBX7 mRNA levels. |
Co-IP, ubiquitination assay, cycloheximide chase (protein stability), RNF2 KD/OE with CBX7 readout, xenograft mouse model |
Cancer & metabolism |
Medium |
39456039
|
| 2024 |
CBX7 promotes HIF-1α transcription and nuclear translocation and transcriptional activity in choroidal vascular endothelial cells under hypoxia, which in turn stimulates VEGF transcription and promotes pro-angiogenic behaviors (migration, proliferation, tube formation) via the CBX7/HIF-1α/VEGF pathway. |
CBX7 knockdown/overexpression in HCVECs, Western blot (HIF-1α, VEGF), nuclear fractionation (HIF-1α translocation), functional angiogenesis assays (migration, tube formation), laser-induced CNV mouse model |
Experimental eye research |
Medium |
39179168
|
| 2024 |
CBX7 interacts with H3K9 methyltransferases EHMT1/2 and SETDB1; pharmacological inhibition of CBX7 abolishes this interaction, reduces H3K9 methylation, and reactivates target gene expression; CBX7 inhibitors also affect H2Aub-mediated (Polycomb) gene repression. |
Co-IP (CBX7–EHMT1/2/SETDB1), pharmacological CBX7 inhibitor treatment, H3K9me and H2Aub Western blot, gene expression assays, combination drug growth assays |
Experimental hematology |
Medium |
39613290
|
| 2025 |
DNMT1 methylates the CBX7 promoter region to repress CBX7 expression in PDAC; reduced CBX7 leads to increased ERK phosphorylation, promoting tumorigenesis and metastasis; the DNMT1/CBX7/ERK axis was confirmed by ChIP and dual-luciferase assays. |
ChIP (DNMT1 at CBX7 promoter), dual-luciferase reporter assay, DNMT1 knockdown with CBX7 and ERK readout, CCK-8/wound healing/transwell functional assays |
FASEB journal |
Medium |
40387566
|
| 2026 |
CBX7 forms a methylation-dependent transcriptional activation complex at cytokine gene promoters in lymphoid cells (unexpected activating role); CBX7 also translocates to the cytosol and forms a methylation-dependent signaling complex with c-Raf, MEK1/2, and CK2-α to sustain ERK1/2 signaling; these activities are lymphoid-cell specific and absent in epithelial cells. |
Co-IP (CBX7–c-Raf–MEK1/2–CK2α), ChIP (CBX7 at cytokine gene promoters), subcellular fractionation, genetic KO and pharmacological inhibition in mouse and human lymphoid cells, RNA-seq, allergic asthma mouse models |
Science advances |
Medium |
41686891
|
| 2026 |
CBX7 preferentially binds Ser31-phosphorylated H3.3K27me3 nucleosomes and recruits KAP1 (KRAB-associated protein 1); disruption of the H3.3–CBX7 interaction impairs H3K9me3 heterochromatin formation and activates retrotransposons; during X-chromosome inactivation, H3K9me2/3 fails to accumulate at the inactive X when the H3.3–CBX7–KAP1 axis is blocked. |
Co-IP/nucleosome pulldown (CBX7 binding to H3.3S31ph-K27me3), H3K9me3 ChIP after H3.3–CBX7 disruption, retrotransposon activation assays, X-chromosome inactivation assays |
Science bulletin |
Medium |
41582043
|