| 2004 |
RNF2 (Ring2/Ring1B) is the catalytic E3 ubiquitin ligase subunit of the hPRC1L complex that monoubiquitinates nucleosomal histone H2A at lysine 119; siRNA knockdown of Ring2 dramatically reduces global H2AK119ub levels in HeLa cells, and the complex co-localizes with ubiquitinated H2A at Polycomb response elements and the Ubx promoter in Drosophila. |
Biochemical purification of hPRC1L complex, in vitro ubiquitination assay, RNAi knockdown, chromatin immunoprecipitation |
Nature |
High |
15386022
|
| 2002 |
Ring1B (Rnf2) physically associates with other Polycomb group proteins (Rae28/Mph1, M33) and chromosomal DNA, and Ring1B hypomorphic mice display posterior homeotic transformations with mild Hox gene derepression; overexpression in chick embryos represses Hoxb9, establishing Ring1B as a Polycomb complex component regulating anterior-posterior axis specification. |
Co-immunoprecipitation, mouse hypomorphic knock-in, in ovo overexpression, in situ hybridization |
Development |
High |
12183370
|
| 2003 |
Complete knockout of Rnf2 in mice causes gastrulation arrest and cell cycle inhibition; the early lethality is partially bypassed by genetic inactivation of the Cdkn2a (Ink4a/ARF) locus, implicating Polycomb-mediated repression of Cdkn2a as a key downstream effector of Ring1B during early development. |
Mouse knockout, genetic epistasis with Cdkn2a null allele, embryo phenotyping |
Proceedings of the National Academy of Sciences of the United States of America |
High |
12589020
|
| 2005 |
Bmi-1 and Ring1A are positive regulators of H2A ubiquitylation within the PRC1 complex; Bmi-1 knockout results in significant loss of H2AK119ub and upregulation of Hoxc13 without affecting EZH2-mediated H3K27me3, placing H2A ubiquitylation downstream of H3K27 methylation in Polycomb silencing. |
Knockout mouse cells, ChIP, in vitro ubiquitination assay |
Molecular cell |
High |
16359901
|
| 2006 |
Crystal structure of the Ring1B–Bmi1 RING-RING heterodimer was solved at 2.5 Å; Ring1B 'hugs' Bmi1 through RING-domain contacts and an N-terminal arm wrapping around Bmi1. Bmi1 enhances Ring1B E3 ligase activity toward H2A in vitro using E2s UbcH5a/b/c and UbcH6; catalytic activity resides in Ring1B, not Bmi1. Mutation of the E2/E3 interface in Ring1B abolishes activity. |
Crystal structure, in vitro ubiquitination reconstitution, active-site mutagenesis |
The EMBO journal |
High |
16710298
|
| 2006 |
A 2.5-Å structure of the Bmi-1–Ring1B core domain complex reveals that Ring1B 'hugs' Bmi1 through RING and N-terminal tail contacts; this dual interaction synergistically stimulates Ring1B E3 ligase activity; modeling suggests the complex stabilizes E2–nucleosome interactions for efficient H2A ubiquitin transfer. |
X-ray crystallography (2.5 Å), in vitro ubiquitination assay, deletion mutagenesis |
The Journal of biological chemistry |
High |
16714294
|
| 2007 |
Proteomics of in vivo biotinylated Ring1B/Rnf2 from erythroid cells identified ~50 interacting proteins, including previously unknown partners: histone demethylases LSD1/Aof2 and Fbxl10/Jhdm1B, casein kinase subunits, and the BCOR corepressor. A novel Ring1B–Fbxl10 complex also containing BcoR, CK2α, Skp1, and Nspc1/Pcgf1 was identified, extending Ring1B functions beyond canonical PRC1. |
In vivo biotinylation tagging, streptavidin affinity purification, mass spectrometry |
Molecular & cellular proteomics : MCP |
Medium |
17296600
|
| 2007 |
Ring1B (Rnf2) deletion in mouse ES cells causes loss of several other PcG proteins (revealing a role in regulating PcG protein levels), derepression of lineage/developmental genes, and aberrant differentiation potential. Despite Ring1B being required for chromosome-wide H2AK119ub1 upon Xist expression, initiation of X-chromosome silencing by Xist is independent of Ring1B. |
Conditional knockout ES cells, gene expression profiling, western blot for PcG protein levels, Xist induction assay |
The Journal of cell biology |
High |
17620408
|
| 2007 |
Prohibitin interacts with RNF2 via co-immunoprecipitation of endogenous proteins; the two proteins regulate E2F1 transcriptional activity via dual pathways (direct prohibitin-mediated and indirect p16-mediated); RNF2 and prohibitin are recruited together to E2F1-responsive promoters (by ChIP), and depletion of either increases p16 and decreases E2F1 activity. |
Co-immunoprecipitation (endogenous), ChIP, RNAi knockdown, luciferase reporter assay |
Oncogene |
Medium |
17873902
|
| 2007 |
Ring1B is a direct substrate of caspases-3 and -9 both in vitro and in vivo; cleavage sites were mapped to Asp175 (caspase-3) and Asp208 (caspase-9); caspase cleavage redistributes Ring1B from exclusive nuclear localization throughout the entire cell and disrupts its transcriptional repression activity. |
In vitro caspase cleavage assay, site-directed mutagenesis of cleavage sites, subcellular localization by immunofluorescence, transcriptional repression assay |
Biochimica et biophysica acta |
High |
17379327
|
| 2008 |
The C-terminal region of Ring1B (C-RING1B) binds the Polycomb cbox domain with 1:1 stoichiometry (Kd 9.2–180 nM depending on Pc orthologue); NMR reveals that C-RING1B is conformationally flexible alone but undergoes structural tightening upon cbox binding, with two conserved subdomains capable of intramolecular interaction that may allow Ring1B to recruit diverse PcG partners. |
NMR spectroscopy, analytical ultracentrifugation, binding affinity measurements |
Biochemistry |
High |
18616292
|
| 2008 |
Ring1B/Rnf2 is required in vivo for three-dimensional genomic contraction and imprinted silencing at the Kcnq1 and Igf2r imprinted clusters in mouse embryos; Rnf2 and Ezh2 act independently to establish the repressive nuclear compartment associated with the paternal allele. |
Mouse embryo in vivo knockout, 3D-FISH for genomic contraction, allele-specific expression analysis |
Developmental cell |
High |
18848501
|
| 2008 |
Ring1B ablation in mouse ES cells results in aberrant expression of key developmental genes (derepression), including TGFβ signaling and cell cycle genes, as well as downregulation of ES cell markers Sox2 and Rex-1; Ring1B-bound genes have bivalent histone marks (H3K4me3 + H3K27me3) or H3K4me3 alone at CpG-rich promoters. |
Conditional Ring1B knockout ES cells, genome-wide expression profiling, correlation with published ChIP-chip binding data |
PloS one |
Medium |
18493325
|
| 2008 |
RNF2 interacts with PHB2 (prohibitin 2), and the RNF2–PHB2 complex represses CP2c-stimulated transcription in a PHB2 dose-dependent manner; the N-terminal 158 residues of RNF2 are sufficient for physical association and functional cooperation with PHB2, while CP2c binds the C-terminus of RNF2. |
Yeast two-hybrid, co-immunoprecipitation, deletion mutagenesis, luciferase reporter assay |
Molecular and cellular biochemistry |
Medium |
18629613
|
| 2009 |
Ring1B/Rnf2 is required for self-renewal and multipotential ability of embryonic neural stem cells (NSCs); Ring1B-deficient NSCs show impaired proliferation in vivo and in neurosphere assays, unscheduled neuronal differentiation under proliferating conditions (enhanced when Ring1A is also deleted), upregulation of neuronal transcription factors and Cdkn1a/p21, and decreased Notch signaling effectors. |
Conditional knockout in neural stem cells, neurosphere assay, single-cell differentiation, in vivo BrdU labeling, mRNA analysis |
Stem cells (Dayton, Ohio) |
High |
19544461
|
| 2009 |
RNF2 is phosphorylated at multiple serine residues; p38 MAPK inhibitor SB203580 blocks phosphorylation at Ser41 (a predicted p38 site confirmed by mass spectrometry in Sf9 cells), while MEK1/2 inhibitor PD98059 blocks the majority of RNF2 phosphorylation events; RNF2 phosphorylation differentially modulates transcription factor expression and histone H2B acetylation. |
2D gel electrophoresis, phospho-specific western blot, kinase inhibitors, mass spectrometry identification of phosphorylation sites |
Proteomics |
Medium |
19405034
|
| 2009 |
Bmi1 and Ring1B are expressed in pancreatic exocrine precursor cells and ductal/islet cells in adult pancreas; Ring1B expression is specifically and persistently upregulated only in high-grade PanINs and pancreatic ductal adenocarcinoma (distinct from Bmi1's earlier induction), and Bmi1 knockdown in acinar tumor cells alters expression of digestive enzymes, implicating PRC1 proteins in pancreatic disease progression. |
Immunohistochemistry in mouse models and human tissue, conditional KRas knock-in model, shRNA knockdown in cell lines |
The Journal of pathology |
Medium |
19585519
|
| 2010 |
Ring1B self-ubiquitination generates K6-, K27-, and K48-based mixed polyubiquitin chains that stimulate (rather than degrade) its E3 ligase activity; E6-AP (UBE3A) ubiquitinates Ring1B on the same lysines to generate K48-linked chains targeting Ring1B for proteasomal degradation; inactivation of E6-AP in vivo elevates Ring1B and H2AK119ub levels and represses HoxB9 in cerebellar Purkinje neurons, with implications for Angelman syndrome. |
In vitro ubiquitination assay, E6-AP knockout mice, western blot, HoxB9 expression analysis |
Proceedings of the National Academy of Sciences of the United States of America |
High |
20351251
|
| 2010 |
USP7 deubiquitinates Ring1B directly and specifically in vitro and in vivo; USP7-Ring1B interaction is mediated in part through Ring1B's RING domain; USP7 is found in a complex with other Polycomb proteins and has a stabilizing effect on Ring1B without discriminating between activating and proteolysis-targeting ubiquitin chains. |
In vitro deubiquitination assay, co-immunoprecipitation, RING domain interaction mapping |
Biochemical and biophysical research communications |
Medium |
20800574
|
| 2011 |
Crystal structure of Bmi1/Ring1b RING-RING heterodimer in complex with E2 enzyme UbcH5c shows UbcH5c interacts exclusively with Ring1b; the Bmi1/Ring1b dimer binds duplex DNA through a basic surface patch unique to the heterodimer; mutation of DNA-binding residues abolishes H2A ubiquitination; computational modeling places the complex interacting with nucleosomal DNA and an acidic patch on histone H4 for substrate specificity. |
Crystal structure of E3-E2 complex, mutagenesis of DNA-binding surface, in vitro H2A ubiquitination assay, computational nucleosome docking |
The EMBO journal |
High |
21772249
|
| 2011 |
Mathematical modeling of the Ring1B/Bmi1 ubiquitination system using biochemical data demonstrates that Ring1B can exhibit bistable switches, oscillations, and excitable (overshoot) transitions between distinct ubiquitination states (self-ubiquitinated active vs. E6-AP-ubiquitinated degradation-targeted); these dynamics can produce all-or-none H2A monoubiquitination rates and discrete periods of gene activity/inactivity controlled by abundances of Bmi1, Ring1B, E6-AP, and USP7. |
Computational/mathematical modeling constrained by biochemical data |
PLoS computational biology |
Low |
22194680
|
| 2012 |
Six major PRC1 complexes each contain a distinct PCGF subunit with RING1A/B; RYBP (or YAF2) stimulates Ring1B H2AK119ub1 activity and defines non-canonical PRC1 complexes that exclude CBX/PHC/SCM; RYBP-containing and CBX-containing PRC1 complexes both compact chromatin but only RYBP stimulates Ring1B catalytic activity; RYBP knockdown in ES cells compromises embryoid body formation and H2AK119ub1 levels. |
Comprehensive proteomics, genome-wide ChIP-seq, in vitro ubiquitination assay with RYBP stimulation, ES cell differentiation assay, knockdown |
Molecular cell |
High |
22325352
|
| 2013 |
RNF2 knockdown in cancer cells (HCT116) significantly inhibits cell proliferation, colony formation, and induces apoptosis in a partially p53-dependent manner; RNF2 directly binds both p53 and MDM2, promotes MDM2-mediated p53 ubiquitination, and increases MDM2 half-life by inhibiting its ubiquitination, thereby suppressing p53 protein levels during DNA damage response. |
RNAi knockdown, overexpression, p53 half-life and ubiquitination assays, co-immunoprecipitation, etoposide DNA damage model |
Oncogene |
Medium |
23318437
|
| 2013 |
Fbxl10/Kdm2b recruits non-canonical PRC1 (containing Ring1B and Nspc1) to CpG islands genome-wide; Fbxl10 depletion causes major loss of Ring1B binding at target genes and loss of H2AK119ub1; Fbxl10's DNA binding capability and Ring1B integration are both required for ubiquitylation; Fbxl10-deficient ES cells cannot differentiate properly. |
Co-IP, genome-wide ChIP-seq, conditional KO ES cells, differentiation assay, in vitro ubiquitination with reconstituted complex |
Molecular cell |
High |
23395003
|
| 2014 |
Crystal structure of the human Ring1B–Bmi1–UbcH5c E3-E2 complex bound to the nucleosome core particle reveals that the PRC1 ubiquitylation module achieves substrate specificity by contacting multiple nucleosome surfaces spatially distinct from the catalytic site; UbcH5c directly contacts the nucleosome (unexpected role for E2 in substrate recognition); the structure provides the mechanism of nucleosome recognition by PRC1 and insight into BRCA1's related H2A ubiquitylation. |
X-ray crystallography of PRC1-nucleosome co-complex |
Nature |
High |
25355358
|
| 2014 |
In pancreatic ductal adenocarcinoma, Snail recruits Ring1B (and Ring1A) via its C-terminal zinc fingers to target promoters to repress gene expression and promote cell migration; Ring1B-mediated H2AK119ub1 is required for Snail-mediated transcriptional repression; EZH2 is required upstream for Snail-Ring1B recruitment; simultaneous depletion of Ring1A and Ring1B abolishes H2AK119ub1 at target promoters and compromises Snail-mediated cell migration. |
Co-immunoprecipitation, ChIP, siRNA knockdown of Ring1A/B, cell migration assay, H2AK119ub1 ChIP |
Cancer research |
Medium |
24903147
|
| 2014 |
Ring1B is essential for expansion of hepatic stem/progenitor cells; conditional Ring1B knockout in mouse embryos inhibits hepatic stem/progenitor proliferation/differentiation and hepatic organogenesis via derepression of CDKIs Cdkn1a and Cdkn2a; clonal culture epistasis shows that simultaneous (not individual) suppression of Cdkn1a and Cdkn2a reverses the Ring1B-depletion cell cycle inhibition. |
Conditional mouse KO, clonal culture epistasis with Cdkn1a/Cdkn2a double knockdown, hepatic organogenesis phenotyping |
Hepatology (Baltimore, Md.) |
High |
24497168
|
| 2015 |
RNF2 is oncogenic and prometastatic in melanoma via two distinct mechanisms: (1) RNF2-mediated H2AK119ub at the LTBP2 promoter silences this negative TGFβ regulator to drive invasion (requires catalytic activity); (2) RNF2 drives proliferation through direct transcriptional upregulation of CCND2 independently of catalytic activity. MEK1-mediated phosphorylation of RNF2 promotes recruitment of activating histone modifiers UTX and p300 to poised promoters to activate gene expression. |
Gain/loss-of-function studies in mouse and human melanoma cells, catalytic-dead mutant rescue, H2AK119ub ChIP, co-IP of UTX/p300 with phospho-RNF2, xenograft models |
Cancer discovery |
High |
26450788
|
| 2015 |
RING1B O-GlcNAcylation at residues T250/S251 and S278 is identified in human ES cells; T250/S251 O-GlcNAcylation decreases during differentiation; ChIP-seq shows that non-O-GlcNAcylated RING1B is enriched near cell cycle genes, whereas O-GlcNAcylated RING1B preferentially targets neuronal genes, suggesting O-GlcNAc modification switches PRC1 genomic targeting during hESC differentiation. |
Point-mutation of O-GlcNAcylation sites, ChIP-seq, O-GlcNAc identification by mass spectrometry |
Stem cell research |
Medium |
26100231
|
| 2015 |
RING1A and RING1B H2AK119ub activity at pericentromeric heterochromatin (PCH) is required for normal S-phase progression; loss of both RING1A and RING1B causes slow elongation and fork stalling preferentially at mid S-phase when PCH is replicated; acute senescence associated with RING1 loss is mediated by p21 (Cdkn1a) upregulation and can be uncoupled from DNA damage response; targeted monoubiquitylation of PCH via MBD1 rescues the replication defect. |
Conditional RING1A/B knockout, BrdU/EdU labeling, DNA fiber analysis, γH2AX immunostaining, chromocenter 3D-FISH, epistasis with p21 and targeted PCH ubiquitylation |
Journal of cell science |
High |
26272920
|
| 2015 |
RNF2 knockdown in prostate cancer cells causes cell cycle arrest and apoptosis; tumor suppressor gene TXNIP is significantly upregulated upon RNF2 knockdown; ChIP shows RNF2 and H2AK119ub enrichment at the TXNIP promoter; simultaneous knockdown of RNF2 and TXNIP partially rescues the arrested cell cycle and apoptosis, placing TXNIP as a key downstream mediator of RNF2's oncogenic function in prostate cancer. |
RNAi knockdown, ChIP, double knockdown epistasis, xenograft, gene microarray |
Oncotarget |
Medium |
28029659
|
| 2017 |
Nuclear RNF2 directly binds STAT1 after interferon stimulation and catalyzes K33-linked polyubiquitination of the STAT1 DNA-binding domain at K379, promoting STAT1/STAT2 dissociation from DNA and suppressing interferon-stimulated gene (ISG) transcription; RNF2 deficiency substantially enhances ISG expression and antiviral responses. |
High-content screening of 115 RING E3 ligases, RNF2 KO/KD, Co-IP of RNF2–STAT1, in vitro ubiquitination assay identifying K33-linked chains at K379, ChIP-seq for STAT1 DNA binding |
Nature immunology |
High |
29242538
|
| 2017 |
RNF2 functions as an E3 ubiquitin ligase targeting SIK1 for proteasomal degradation in hepatocellular carcinoma; RNF2 directly physically interacts with SIK1; RNF2 expression is negatively correlated with SIK1 levels in HCC tissues; RNF2 knockdown reduces tumor growth and metastasis, which is rescued by simultaneous SIK1 knockdown. |
Co-immunoprecipitation, ubiquitination assay, RNAi knockdown, rescue epistasis, xenograft |
Oncotarget |
Medium |
27911266
|
| 2018 |
Ring1A and Ring1B (RNF2) function as suppressors of transcription-replication conflicts (TRCs) and common fragile site (CFS) instability; BMI1/RNF2-depleted cells show slower replication forks, elevated fork stalling, increased RNA Pol II occupancy at CFSs, and increased associations between RNAPII and nascent replication forks (measured by proximity ligation assay); RNF2-KO cells show increased FANCD2 and RNH1 at CFSs consistent with R-loop accumulation; FANCD2/FANCI depletion further increases genomic instability in RNF2-KO cells. |
DNA fiber assay, proximity ligation assay (PLA) for RNAPII-replisome associations, ChIP for FANCD2/RNH1, CRISPR KO, double depletion epistasis |
PLoS genetics |
High |
32142505
|
| 2020 |
RING1B is highly expressed in Ewing sarcoma (EwS) and co-localizes with EWSR1-FLI1 at active enhancers while retaining repressive activity at canonical Polycomb developmental target genes; RING1B is required for EWSR1-FLI1 recruitment to enhancers and expression of key oncogenic targets; RING1B knockdown impairs xenograft tumor growth; pharmacological AURKB inhibition increases H2AK119ub and downregulates RING1B/EWSR1-FLI1 common targets. |
ChIP-seq, siRNA knockdown, xenograft tumor model, AURKB pharmacological inhibition, gene expression profiling |
Science advances |
Medium |
33097530
|
| 2021 |
RNF2 (Ring1B) promotes colon cancer progression by acting as an E3 ubiquitin ligase that directly interacts with and ubiquitinates IRF4, targeting it for proteasomal degradation; RNF2 overexpression enhances proliferation, migration, and invasion via IRF4 degradation; RNF2 knockdown causes opposite effects rescued by IRF4 co-knockdown. |
Co-immunoprecipitation, ubiquitination assay, RNAi knockdown, overexpression, xenograft, rescue epistasis |
Biochimica et biophysica acta. Molecular cell research |
Medium |
34670117
|
| 2021 |
RASSF10 is a substrate for the E3 ubiquitin ligase RNF2; NPM-dependent downregulation of RNF2 is critical to maintain stable RASSF10 levels; RASSF10 promotes G2/M arrest via inhibition of Cdk1/cyclin-B and nuclear accumulation of GADD45a; this RASSF10/NPM/RNF2 cascade controls cell proliferation in gastric cancer. |
LC-MS/MS, live cell imaging, co-immunoprecipitation, ubiquitination assay, RNAi knockdown, cell cycle analysis |
The Journal of biological chemistry |
Medium |
34224728
|
| 2021 |
Ring1b forms distinct complexes with either DEAD-box helicases (DDXs) or EMT transcription factors (EMT TFs) at specific loci on the E-cadherin promoter; DDX-Ring1b complexes moderately repress E-cadherin inducing a hybrid EMT state, while EMT TF-Ring1b complexes cooperate with DDX complexes for full repression in mesenchymal-like breast cancer cells, driving metastasis. |
Co-immunoprecipitation of distinct complexes, ChIP at E-cadherin promoter, RNAi knockdown, metastasis assay |
Cell death & disease |
Medium |
33608512
|
| 2021 |
RNF2 overexpression in mammary carcinoma promotes cell proliferation, colony formation, migration, and invasion through downregulation of E-cadherin protein, implicating RNF2-driven EMT as a mechanism of breast cancer progression. |
RNF2 overexpression and knockdown in cell lines, western blot for E-cadherin, cell migration and invasion assays |
Pathology, research and practice |
Low |
31300294
|
| 2023 |
A PROTAC degrader (MS147) targeting both BMI1 and RING1B via their interaction with EED (a PRC2 component) degrades BMI1/RING1B in an EED-, VHL-, ubiquitination-, and time-dependent manner; MS147 selectively reduces H2AK119ub without affecting H3K27me3, confirming RING1B as the H2AK119ub catalytic subunit, and inhibits proliferation of cancer cells insensitive to PRC2 inhibitors. |
PROTAC degrader chemistry, EED-VHL bifunctional molecule, H2AK119ub and H3K27me3 western blot, cancer cell proliferation assay |
Advanced science (Weinheim, Baden-Wurttemberg, Germany) |
Medium |
36737841
|
| 2012 |
In zebrafish, ring1b mutants show a severe craniofacial phenotype with near-complete absence of cranial cartilage, bone, and musculature; cranial neural crest cells migrate correctly into pharyngeal arches but fail to differentiate into chondrocytes; other neural crest-derived lineages (glia, neurons, chromatophores) are formed normally, revealing a specific role for Ring1b in promoting chondrocyte differentiation from CNC cells. |
Zebrafish ring1b mutant analysis, cell lineage tracing, in situ hybridization |
PloS one |
High |
24040141
|
| 2012 |
Zebrafish ring1b is essential for pectoral fin development; lateral plate mesoderm differentiation into fin precursors is initiated normally, but fin bud outgrowth is impaired due to insufficient Fgf signaling activation; exogenous FGF4 or hyperactivated Wnt signaling (apc mutant) partially restores the fin program, establishing that PcG-mediated Ring1b gene regulation is required for sustained Fgf signaling in vertebrate limb development. |
Zebrafish ring1b mutant, FGF4 rescue experiment, genetic interaction with apc mutant, in situ hybridization for Fgf targets |
Development (Cambridge, England) |
High |
22619390
|
| 2018 |
Ring1A and Ring1B repress Glis2 expression in MOZ-TIF2 AML stem cells; deletion of Ring1A/B diminishes self-renewal and induces numerous genes including Glis2; Glis2 overexpression causes differentiation of AML cells while Glis2 knockdown in Ring1A/B-deficient AML cells inhibits differentiation, demonstrating that Ring1A/B maintain AML stem cells partly by repressing Glis2. |
Conditional Ring1A/B knockout in AML mouse model, gene expression profiling, Glis2 overexpression and knockdown rescue |
Blood |
High |
29371181
|
| 2019 |
RNF2 knockdown enhances radiosensitivity of squamous cell lung carcinoma cells by inhibiting irradiation-induced γH2AX foci formation and impairing interactions among ATM, MDC1, and H2AX; RNF2 knockdown combined with irradiation causes G1 arrest, increased apoptosis, and upregulation of p16 and Bax with downregulation of cyclin D2, CDK4, and Bcl-2. |
shRNA knockdown, clonogenic survival, co-immunoprecipitation of ATM-MDC1-H2AX, γH2AX foci counting, flow cytometry, xenograft |
Biochemistry and cell biology = Biochimie et biologie cellulaire |
Medium |
30673298
|
| 2002 |
The core of the human Polycomb repressive complex (hPRC-H) was purified from HeLa cells and contains homologues of Drosophila PRC1 core proteins including RING1/Ring1B, with fewer non-PcG components than dPRC1; hPRC-H retains the ability to block nucleosomal array remodeling similarly to dPRC1, demonstrating functional conservation of the Ring1B-containing PRC1 complex between flies and humans. |
Biochemical purification from HeLa cells, chromatin compaction/remodeling assay |
Molecular and cellular biology |
High |
12167701
|
| 2006 |
A BCOR complex contains Polycomb proteins RING1, RYBP, NSPC1, a Posterior Sex Combs homolog, and RNF2 as E3 ligase for H2A mono-ubiquitylation, as well as SKP1 and FBXL10 (a histone H3K36 demethylase); BCOR complex components and mono-ubiquitylated H2A co-localize at BCL6 target genes by ChIP, establishing that BCL6 can recruit PcG proteins including RNF2 to specific genomic loci. |
Immunoprecipitation/mass spectrometry complex identification, ChIP at BCL6 target genes |
Molecular and cellular biology |
Medium |
16943429
|