| 2007 |
RNF8 assembles at DNA double-strand breaks (DSBs) via its FHA domain binding to phosphorylated MDC1, and its RING domain ubiquitin ligase activity ubiquitylates histone H2A and H2AX at DSB sites, promoting accumulation of 53BP1 and BRCA1 repair proteins. Disruption of either FHA or RING domain impairs DSB-associated ubiquitylation and repair factor retention. |
FHA/RING domain mutagenesis, RNF8 knockdown, co-immunoprecipitation, immunofluorescence foci assays, in vitro ubiquitylation |
Cell |
High |
18001824 18001825 18006705
|
| 2007 |
Crystal structure of the RNF8 FHA domain resolved at 1.35 Å, establishing structural basis for phospho-dependent interaction with MDC1 which is phosphorylated by ATM kinase. |
X-ray crystallography |
Cell |
High |
18001825
|
| 2007 |
RNF8 cooperates with the E2-conjugating enzyme UBC13 to generate K63-linked polyubiquitin chains at DSBs, which are recognized by the UIM domains of RAP80, recruiting the entire BRCA1-A complex (BRCA1/BARD1/Abraxas/RAP80/BRCC36) to damage sites. |
Co-immunoprecipitation, UBC13 depletion, immunofluorescence foci assays |
Science; PNAS |
High |
18006705 18077395
|
| 2006 |
RNF8 recruits UBC13 through its RING domain to catalyze K63-linked polyubiquitin chains, and can also engage other E2s to catalyze K48-linked chains; RNF8 co-localizes with UBC13 in the nucleus. |
Yeast two-hybrid, in vitro ubiquitylation assay, co-localization by fluorescence microscopy |
Journal of cellular biochemistry |
Medium |
16215985
|
| 2001 |
RNF8 interacts with class III E2 ubiquitin-conjugating enzymes (UBE2E2, UbcH6, UBE2E3) through its RING domain, and the RING domain is required for E2-dependent autoubiquitination activity in vitro. RNF8 localizes to the nucleus. |
Yeast two-hybrid, in vitro ubiquitylation assay, RING point mutant (C403S), GFP localization in COS-7 cells |
European journal of biochemistry |
Medium |
11322894
|
| 2009 |
The BRCC36 deubiquitinase within the RAP80-BRCC36 complex opposes RNF8-Ubc13-dependent ubiquitination at DSBs, establishing that steady-state ubiquitin levels at DSBs are determined by opposing RNF8-Ubc13 ligase and BRCC36 hydrolase activities. |
RNF8 knockdown, BRCC36 knockdown, BRCC36 catalytic mutant expression, immunofluorescence, γH2AX ubiquitination assay |
PNAS |
High |
19202061
|
| 2009 |
RNF8 is recruited to sites of UV-induced nucleotide excision repair lesions through interaction with MDC1, in an ATR-dependent and cell cycle-independent manner, where it promotes H2A ubiquitination via Ubc13. |
RNF8/Ubc13 depletion, UV damage foci assays, MDC1 co-immunoprecipitation, cell cycle analysis |
Journal of Cell Biology |
High |
19797077
|
| 2010 |
RNF8-dependent histone ubiquitination in spermatids induces H4K16 acetylation (trans-histone cross-talk), which is required for global nucleosome removal during spermatogenesis. RNF8-deficient mice are proficient in MSCI but deficient in global nucleosome removal. |
RNF8 knockout mice, chromatin fractionation, histone modification analysis by western blot and immunofluorescence |
Developmental Cell |
High |
20153262
|
| 2010 |
Herpes simplex virus ICP0, an E3 ubiquitin ligase, targets RNF8 (and RNF168) for proteasomal degradation, resulting in loss of H2A ubiquitination and mobilization of DNA repair proteins, thereby hijacking the cellular DSB response. |
Co-immunoprecipitation, western blot for protein degradation, immunofluorescence, viral fitness assays |
EMBO Journal |
High |
20075863
|
| 2012 |
RNF8 primarily forms K48-linked ubiquitin chains on chromatin at DSBs (distinct from RNF168 which forms K63-linked chains via UBC13), promoting proteasomal degradation of substrates including KU80, thereby regulating KU80 removal and non-homologous end-joining. |
Ubiquitin linkage-specific antibodies, in vitro ubiquitylation, RNF8/RNF168 knockdown, live-cell imaging of KU80 at damage sites |
Nature Structural & Molecular Biology |
High |
22266820
|
| 2012 |
RNF8 and RNF168 ubiquitinate JMJD2A/KDM4A, triggering its proteasomal degradation at DSB sites. JMJD2A normally competes with 53BP1 for binding to H4K20me2; its RNF8-dependent degradation unmasks H4K20me2 to allow 53BP1 recruitment. |
Ubiquitination assay, proteasome inhibitor treatment, JMJD2A overexpression rescue, combined JMJD2A/2B knockdown in RNF8/168-deficient cells |
EMBO Journal |
High |
22373579
|
| 2012 |
RNF8 mediates chromatin decondensation at DSBs through a non-catalytic (ubiquitin ligase-independent) interaction via its FHA domain with CHD4, the catalytic subunit of the NuRD chromatin remodeling complex. CHD4-mediated chromatin remodeling promotes efficient RNF168 and BRCA1 assembly at DSBs. |
RING/FHA domain mutants, CHD4 depletion, chromatin decondensation assay, co-immunoprecipitation, immunofluorescence |
EMBO Journal |
High |
22531782
|
| 2012 |
HERC2 undergoes DNA damage-induced SUMOylation by PIAS4; SUMOylated HERC2, together with phosphorylation at T4827, binds RNF8 via the HERC2 ZZ zinc finger (a novel SUMO-binding module), stabilizing the RNF8-Ubc13 complex at DSBs. |
Co-immunoprecipitation, SUMO site mapping, ZZ domain mutants, PIAS4 depletion, in vitro SUMO-binding assay |
Journal of Cell Biology |
High |
22508508
|
| 2011 |
RNF8 and Chfr synergistically regulate histone ubiquitination to control H4K16 acetylation via MRG15-dependent acetyltransferase complexes, which in turn promotes chromatin relaxation and ATM kinase activation in response to DNA damage. DKO cells show suppressed ATM activation. |
Double-knockout mice, chromatin relaxation assay, acetylation western blot, MRG15 co-immunoprecipitation, ATM kinase assay |
Nature Structural & Molecular Biology |
High |
21706008
|
| 2008 |
RNF8 ubiquitinates PCNA in vitro with UbcH5c (monoubiquitination) and with Ubc13/Uev1a (polyubiquitination), mirroring Rad18/Rad6 and Rad5/Ubc13 activities, and RNF8 depletion suppresses UV- and MNNG-stimulated PCNA mono-ubiquitination in vivo. |
In vitro ubiquitylation assay, RNF8 shRNA depletion, western blot for ubiquitinated PCNA |
Cell Cycle |
Medium |
18948756
|
| 2011 |
Rnf8 localizes to uncapped telomeres and promotes accumulation of 53BP1 and phospho-ATM at deprotected telomeres via H2A ubiquitylation, facilitating non-homologous end-joining of dysfunctional telomere ends. |
RNF8 depletion, telomere dysfunction-induced foci (TIF) assay, chromosome fusions by metaphase analysis |
Nature Cell Biology |
High |
21857671
|
| 2011 |
Rnf8 physically interacts with Tpp1 and generates Ubc13-dependent K63-linked polyubiquitin chains on Tpp1 at Lys233, stabilizing Tpp1 at telomeres. The RING domain of Rnf8 is essential for Tpp1 stability and telomere end protection. |
Co-immunoprecipitation, in vitro ubiquitylation, RING domain mutant, K233R Tpp1 mutant, telomere-FISH, chromosome end-to-end fusion analysis |
Nature Structural & Molecular Biology |
High |
22101936
|
| 2012 |
RNF8 directly ubiquitinates Nbs1 both before and after DNA damage; RNF8 ubiquitination of Nbs1 promotes Nbs1's stable binding to DSB-containing chromatin and is required for efficient homologous recombination. |
Co-immunoprecipitation, in vitro ubiquitylation, laser microirradiation + live-cell imaging, HR repair assay |
Journal of Biological Chemistry |
Medium |
23115235
|
| 2012 |
RNF8 ubiquitinates FAAP20; this ubiquitin signal is recognized by FAAP20's ubiquitin-binding domain to recruit the Fanconi anemia core complex and FANCD2 to interstrand crosslink sites, enabling FANCD2 monoubiquitination and ICL repair. |
Co-immunoprecipitation, in vitro ubiquitylation, FAAP20 UBD mutations, FANCD2 monoubiquitination assay, ICL sensitivity assays |
Molecular Cell |
High |
22705371
|
| 2013 |
JMJD1C demethylates MDC1 at Lys45, promoting MDC1-RNF8 interaction and RNF8-dependent MDC1 ubiquitylation. JMJD1C is stabilized by its interaction with RNF8 and is required for RAP80-BRCA1 but not 53BP1 recruitment to DSBs. |
Co-immunoprecipitation, demethylation assay, JMJD1C depletion, immunofluorescence foci assays |
Nature Structural & Molecular Biology |
High |
24240613
|
| 2012 |
RNF8 ubiquitinates the p12 subunit of DNA polymerase δ (with UbcH5c as E2), targeting it for proteasomal degradation in response to DNA damage. RNF8 knockdown or knockout significantly reduces damage-induced p12 degradation. |
Biochemical purification from HeLa cells, proteomics identification, shRNA knockdown in human cells, RNF8(-/-) mouse epithelial cells |
Journal of Biological Chemistry |
Medium |
23233665
|
| 2011 |
A single point mutation (I405A) in the RNF8 RING domain selectively disrupts interaction with UBCH8 and abolishes K48-linked polyubiquitylation but preserves interaction with UBC13 and K63-linked chain formation and downstream BRCA1/53BP1 assembly, revealing differential E2 utilization for distinct chain topologies. |
RNF8 I405A point mutant, in vitro ubiquitylation with linkage-specific analysis, co-immunoprecipitation with UBCH8/UBC13, immunofluorescence |
Nucleic Acids Research |
High |
21911360
|
| 2016 |
RNF8 directly ubiquitinates Twist1 with K63-linked chains, promoting Twist1 nuclear localization and downstream EMT/cancer stem cell functions. K63-ubiquitination is required for Twist's transcriptional activities conferring chemoresistance. |
E3 ligase screen, co-immunoprecipitation, in vitro ubiquitylation, ubiquitin-linkage specific assays, nuclear localization assay, EMT/CSC functional readouts |
Molecular Cell |
High |
27618486
|
| 2016 |
RNF8 E3 ligase stimulates Ubc13 polyubiquitination activity by modulating the conformation of ubiquitin covalently linked to the Ubc13 active site. Crystal structure of the RNF8-Ubc13~ubiquitin complex resolved, and separation-of-function mutations demonstrate that this stimulatory activity is essential for DSB signaling and independently required for BRCA1 recruitment. |
X-ray crystallography, SAXS, separation-of-function mutagenesis, in vitro ubiquitylation, immunofluorescence in cells |
Journal of Biological Chemistry |
High |
26903517
|
| 2017 |
RNF8, together with the E2 Ube2S, assembles K11-linked ubiquitin chains on damaged chromatin including histone H2A/H2AX in an ATM-dependent manner. K11-linked ubiquitination regulates DNA damage-induced transcriptional silencing, distinct from K63-linked ubiquitination which recruits 53BP1 and BRCA1. |
K11 linkage-specific antibodies, in vitro ubiquitylation, Ube2S depletion, RNF8 depletion, transcription reporter assays |
Molecular Cell |
High |
28525740
|
| 2017 |
EGF receptor activation leads to PKM2-mediated phosphorylation of histone H3 at T11; this phospho-H3 is bound by the RNF8 FHA domain, directing K48-linked polyubiquitylation of histone H3 at K4, causing H3 proteasomal degradation, nucleosome disassembly, and RNA Pol II access for MYC and CCND1 transcription. |
Co-immunoprecipitation, FHA domain-phosphopeptide binding, in vitro ubiquitylation, chromatin immunoprecipitation, nucleosome disassembly assay |
Journal of Experimental Medicine |
High |
28507061
|
| 2017 |
RNF8 operates in the cytoplasm in post-mitotic cerebellar granule neurons (distinct from its nuclear role in dividing cells), where it interacts with HERC2 and NEURL4 scaffold to suppress synapse differentiation via UBC13-dependent ubiquitination. Neuronal-specific RNF8/UBC13 knockout increases parallel fiber synapses and impairs cerebellar-dependent learning. |
In vivo shRNA knockdown, conditional knockout in granule neurons, proteomic proximity analyses (BioID), immunofluorescence, electrophysiology, behavioral assays |
Nature Communications |
High |
29097665
|
| 2018 |
L3MBTL2 is ubiquitylated by RNF8 following DNA damage, and ubiquitylated L3MBTL2 facilitates recruitment of RNF168 to DSBs, establishing L3MBTL2 as the missing link between RNF8 and RNF168 in the sequential ubiquitin signaling cascade. |
Co-immunoprecipitation, in vitro ubiquitylation, L3MBTL2 depletion, immunofluorescence, DSB repair assays |
Nature Cell Biology |
High |
29581593
|
| 2019 |
The p97/VCP unfoldase and Ataxin-3 (ATX3) deubiquitinase form a complex with RNF8 to regulate its proteasome-dependent steady-state levels. Under genotoxic stress, p97-ATX3 promotes extraction of RNF8 from chromatin to balance DNA repair pathway choice. |
Co-immunoprecipitation, p97/ATX3 depletion, chromatin fractionation, proteasome inhibitor treatment, clonogenic survival |
EMBO Journal |
High |
31613024
|
| 2019 |
RNF8 ubiquitinates NONO, targeting it for proteasomal degradation following UV-induced DNA damage. NONO degradation removes TOPBP1 chromatin loading, thus terminating ATR-CHK1 checkpoint signaling as a negative feedback loop. ATR is required for RNF8 recruitment to UV damage sites. |
Co-immunoprecipitation, in vitro ubiquitylation, NONO lysine mutants, CHK1 phosphorylation time course, clonogenic survival |
Nucleic Acids Research |
High |
30445466
|
| 2018 |
RNF8 ubiquitylates the active NOTCH1 intracellular domain (N1ICD) with K48-linked chains, targeting it for proteasomal degradation, thereby acting as a negative regulator of Notch1 signaling and mammary luminal progenitor cell fate. |
Co-immunoprecipitation, in vitro ubiquitylation, Rnf8 knockout mouse mammary gland analysis, Notch reporter assay |
Journal of Clinical Investigation |
Medium |
30222135
|
| 2007 |
RNF8 overexpression delays cytokinesis and causes aberrant mitotic figures in a ubiquitin-ligase-activity-dependent manner; RNF8 depletion delays exit from nocodazole-induced mitotic arrest associated with reduced cyclin B1 turnover, indicating RNF8 regulates the rate of mitotic exit. |
RNF8 overexpression and RING mutant expression, RNF8 depletion, time-lapse microscopy, cyclin B1 degradation assay |
Oncogene |
Medium |
17724460
|
| 2004 |
RNF8 binds to RXRα through the N-terminal regions of both proteins and dose-dependently enhances RXRα-mediated transactivation in a RING-domain-dependent manner. The RING C403S point mutant or ΔN deletion of RNF8 abolished nuclear localization and transactivation enhancement. |
Yeast two-hybrid, pull-down, FRET in live cells, transient transfection reporter assay, RING point mutant |
Journal of Biological Chemistry |
Medium |
14981089
|
| 2013 |
Human RNF8 (ortho-functional to yeast Dma proteins) localizes to centrosomes and cell division sites and promotes K63-linked ubiquitylation of the septin SEPT7. SEPT7 depletion increases cell division anomalies, analogous to yeast Dma-septin regulation. |
Immunofluorescence localization, in vitro ubiquitylation, SEPT7 depletion, yeast genetics |
Cell Cycle |
Medium |
23442799
|
| 2012 |
RNF8-dependent ubiquitination of histone H2A during meiosis establishes H3K4 dimethylation (active epigenetic memory) on sex chromosomes, which persists through meiotic division. Subsequent RNF8-dependent modifications in spermatids include H3K4me3, histone crotonylation, and H2AFZ incorporation, enabling escape gene activation from silent sex chromosomes. |
Rnf8 knockout mouse model, ChIP-seq, chromatin conformation capture, immunofluorescence, RNA-seq |
Genes & Development |
High |
23249736
|
| 2016 |
RNF8 ubiquitinates tankyrase 1 with K63-linked chains in late S/G2 phase, stabilizing tankyrase 1 and promoting its association with telomeres for sister telomere resolution. ABRO1/BRCC36 removes these chains in G1, timing cohesion resolution to the cell cycle. |
Co-immunoprecipitation, in vitro ubiquitylation, linkage-specific antibodies, cell cycle fractionation, telomere cohesion assay |
EMBO Journal |
High |
27993934
|
| 2021 |
RNF8 directly ubiquitinates AKT via K63-linked chains, promoting AKT activation under physiological and genotoxic conditions, which contributes to lung cancer cell proliferation and chemotherapy resistance. |
Co-immunoprecipitation, in vitro ubiquitylation, K63 linkage-specific antibodies, RNF8 overexpression/knockdown with AKT activity readouts |
Cell Reports |
Medium |
34686341
|
| 2017 |
RNF8 interacts with DYRK2 kinase; DYRK2 depletion impairs RNF8-mediated monoubiquitination of γH2AX and prevents 53BP1 foci formation at DSBs, indicating that DYRK2 facilitates RNF8-dependent DDR signaling. |
High-throughput screening, co-immunoprecipitation, γH2AX ubiquitination assay, DYRK2 knockdown, immunofluorescence, HR assay |
FEBS Letters |
Medium |
28194753
|
| 2023 |
RNF8 ubiquitylates XRN2 to facilitate XRN2's recruitment to R-loop-prone genomic loci. In BRCA1-mutant cells, RNF8 deficiency reduces XRN2 occupancy at these sites, causing R-loop accumulation, replication-transcription collisions, and synthetic lethality. |
Co-immunoprecipitation, in vitro ubiquitylation, ChIP-seq for XRN2 and R-loop markers (S9.6 antibody), DRIP-seq, clonogenic survival |
Nucleic Acids Research |
High |
37697435
|
| 2021 |
RNF8 ubiquitinates KMT5A (PR-Set7/SET8), promoting its recruitment to DSBs. RNF8-ubiquitinated KMT5A drives local H4K20me1 and enhances RNF168-catalyzed H2A ubiquitination; the interaction between the H2A acidic patch and KMT5A R188/R189 is critical for this function. |
Co-immunoprecipitation, in vitro ubiquitylation, KMT5A site-directed mutants, ChIP, H2A ubiquitination assay |
FASEB Journal |
Medium |
33710666
|
| 2021 |
RNF8 ubiquitinates RecQL4 at K876, K1048, and K1101, promoting RecQL4's dissociation from DSB sites. Ubiquitination-defective RecQL4 is retained at DSBs and hinders recruitment of CtIP and Ku80 downstream. WRAP53β enhances the RecQL4-RNF8 association. |
Co-immunoprecipitation, in vitro ubiquitylation, site-directed RecQL4 mutants, laser microirradiation + live-cell imaging, WRAP53β knockdown |
Oncogenesis |
Medium |
33674555
|
| 2017 |
HUWE1 primes histone H1 with ubiquitin following UV damage; RNF8 and Ubc13 then extend these modifications to K63-linked chains on H1. HUWE1 depletion reduces RNF168 and 53BP1 recruitment to UV damage sites while MDC1 (upstream of H1 ubiquitination) is unaffected. |
Di-Gly proteomics, HUWE1 depletion, RNF8/Ubc13 pathway assays, immunofluorescence foci assays |
Scientific Reports |
Medium |
29127375
|
| 2012 |
RNF8 and BRCA1 localize to the nucleolus in the absence of DNA damage via RNF8 FHA domain interaction with ribosomal protein RPSA. Following γ-irradiation, RNF8 and BRCA1 translocate from the nucleolus to DSB foci; RPSA knockdown depletes nucleolar RNF8 and impairs bulk protein translation. |
Immunofluorescence co-localization, co-immunoprecipitation of RNF8 with RPSA, RPSA depletion, polysome profiling |
Experimental Cell Research |
Medium |
22814251
|
| 2023 |
RNF8 interacts with MAD2 (closed conformer) via its RING domain, competing with p31comet, while CAMK2D (phospho-Thr287) serves as a molecular scaffold concentrating the RNF8-MAD2 complex via RNF8's FHA domain, thereby generating a mitotic checkpoint signal. RNF8 overexpression impairs mitotic progression in glioma stem cells in an FHA- and RING-dependent manner. |
Proximity proteomics, co-immunoprecipitation, CAMK2D phospho-mutants, FHA/RING domain mutants, live-cell mitosis imaging |
Cell Death & Differentiation |
Medium |
37468549
|
| 2020 |
RNF8 promotes K63-linked ubiquitination of β-catenin, facilitating its nuclear translocation and subsequent c-Myc transcriptional activation in colon cancer cells. |
Co-immunoprecipitation, K63-specific ubiquitination assay, nuclear fractionation, RNF8 overexpression/knockdown with β-catenin/c-Myc readouts |
International Journal of Biological Sciences |
Low |
32549753
|
| 2020 |
RNF8 promotes K63-linked ubiquitination of Slug, stabilizing Slug protein and activating PI3K/Akt signaling to promote EMT in lung cancer cells. |
Co-immunoprecipitation, K63-linked ubiquitination assay, Slug knockdown/rescue, PI3K inhibitor treatment, EMT marker analysis |
Molecular Cancer Research |
Low |
32753472
|
| 2022 |
RNF8 ubiquitinates HDAC2, promoting its proteasomal degradation. In neurons, HDAC2 inhibits Reelin expression via H3K27me3 deacetylation; RNF8-mediated HDAC2 degradation de-represses Reelin, leading to GSK3β inhibition (via Ser9 phosphorylation) and neuronal protection against ischemic injury. |
Co-immunoprecipitation, ubiquitination assay, RNF8 knockdown, HDAC2 inhibitor, Reelin promoter ChIP, OGD/R neuronal model |
Molecular Neurobiology |
Low |
35622272
|