RNF8

Gene Information

Official Symbol: RNF8
Official Name: ring finger protein 8
Aliases and Previous Symbols: N/A
Entrez ID: 9025
UniProt: O76064
Interactions: BioGRID
PubMed articles: Open PubMed
OMIM: Open OMIM

Function Summary

Entrez Summary: N/A
UniProt Summary: E3 ubiquitin-protein ligase that plays a key role in DNA damage signaling via 2 distinct roles: by mediating the 'Lys-63'- linked ubiquitination of histones H2A and H2AX and promoting the recruitment of DNA repair proteins at double-strand breaks (DSBs) sites, and by catalyzing 'Lys-48'-linked ubiquitination to remove target proteins from DNA damage sites. Following DNA DSBs, it is recruited to the sites of damage by ATM-phosphorylated MDC1 and catalyzes the 'Lys-63'-linked ubiquitination of histones H2A and H2AX, thereby promoting the formation of TP53BP1 and BRCA1 ionizing radiation-induced foci (IRIF). Also controls the recruitment of UIMC1-BRCC3 (RAP80-BRCC36) and PAXIP1/PTIP to DNA damage sites. Also recruited at DNA interstrand cross-links (ICLs) sites and catalyzes 'Lys-63'-linked ubiquitination of histones H2A and H2AX, leading to recruitment of FAAP20/C1orf86 and Fanconi anemia (FA) complex, followed by interstrand cross-link repair. H2A ubiquitination also mediates the ATM-dependent transcriptional silencing at regions flanking DSBs in cis, a mechanism to avoid collision between transcription and repair intermediates. Promotes the formation of 'Lys-63'-linked polyubiquitin chains via interactions with the specific ubiquitin-conjugating UBE2N/UBC13 and ubiquitinates non-histone substrates such as PCNA. Substrates that are polyubiquitinated at 'Lys-63' are usually not targeted for degradation. Also catalyzes the formation of 'Lys-48'-linked polyubiquitin chains via interaction with the ubiquitin- conjugating UBE2L6/UBCH8, leading to degradation of substrate proteins such as CHEK2, JMJD2A/KDM4A and KU80/XRCC5: it is still unclear how the preference toward 'Lys-48'- versus 'Lys-63'-linked ubiquitination is regulated but it could be due to RNF8 ability to interact with specific E2 specific ligases. For instance, interaction with phosphorylated HERC2 promotes the association between RNF8 and UBE2N/UBC13 and favors the specific formation of 'Lys-63'-linked ubiquitin chains. Promotes non-homologous end joining (NHEJ) by promoting the 'Lys-48'-linked ubiquitination and degradation the of KU80/XRCC5. Following DNA damage, mediates the ubiquitination and degradation of JMJD2A/KDM4A in collaboration with RNF168, leading to unmask H4K20me2 mark and promote the recruitment of TP53BP1 at DNA damage sites (PubMed:11322894, PubMed:14981089, PubMed:17724460, PubMed:18001824, PubMed:18001825, PubMed:18006705, PubMed:18077395, PubMed:18337245, PubMed:18948756, PubMed:19015238, PubMed:19124460, PubMed:19202061, PubMed:19203578, PubMed:19203579, PubMed:20550933, PubMed:21558560, PubMed:21857671, PubMed:21911360, PubMed:22266820, PubMed:22373579, PubMed:22531782, PubMed:22705371, PubMed:22865450, PubMed:22980979). Following DNA damage, mediates the ubiquitination and degradation of POLD4/p12, a subunit of DNA polymerase delta. In the absence of POLD4, DNA polymerase delta complex exhibits higher proofreading activity (PubMed:23233665). In addition to its function in damage signaling, also plays a role in higher-order chromatin structure by mediating extensive chromatin decondensation. Involved in the activation of ATM by promoting histone H2B ubiquitination, which indirectly triggers histone H4 'Lys-16' acetylation (H4K16ac), establishing a chromatin environment that promotes efficient activation of ATM kinase. Required in the testis, where it plays a role in the replacement of histones during spermatogenesis. At uncapped telomeres, promotes the joining of deprotected chromosome ends by inducing H2A ubiquitination and TP53BP1 recruitment, suggesting that it may enhance cancer development by aggravating telomere- induced genome instability in case of telomeric crisis. Promotes the assembly of RAD51 at DNA DSBs in the absence of BRCA1 and TP53BP1 Also involved in class switch recombination in immune system, via its role in regulation of DSBs repair. May be required for proper exit from mitosis after spindle checkpoint activation and may regulate cytokinesis. May play a role in the regulation of RXRA-mediated transcriptional activity. Not involved in RXRA ubiquitination by UBE2E2 (PubMed:11322894, PubMed:14981089, PubMed:17724460, PubMed:18001824, PubMed:18001825, PubMed:18006705, PubMed:18077395, PubMed:18337245, PubMed:18948756, PubMed:19015238, PubMed:19124460, PubMed:19202061, PubMed:19203578, PubMed:19203579, PubMed:20550933, PubMed:21558560, PubMed:21857671, PubMed:21911360, PubMed:22266820, PubMed:22373579, PubMed:22531782, PubMed:22705371, PubMed:22865450, PubMed:22980979). {ECO:0000269|PubMed:11322894, ECO:0000269|PubMed:14981089, ECO:0000269|PubMed:17724460, ECO:0000269|PubMed:18001824, ECO:0000269|PubMed:18001825, ECO:0000269|PubMed:18006705, ECO:0000269|PubMed:18077395, ECO:0000269|PubMed:18337245, ECO:0000269|PubMed:18948756, ECO:0000269|PubMed:19015238, ECO:0000269|PubMed:19124460, ECO:0000269|PubMed:19202061, ECO:0000269|PubMed:19203578, ECO:0000269|PubMed:19203579, ECO:0000269|PubMed:20550933, ECO:0000269|PubMed:21558560, ECO:0000269|PubMed:21857671, ECO:0000269|PubMed:21911360, ECO:0000269|PubMed:22266820, ECO:0000269|PubMed:22373579, ECO:0000269|PubMed:22531782, ECO:0000269|PubMed:22705371, ECO:0000269|PubMed:22865450, ECO:0000269|PubMed:22980979, ECO:0000269|PubMed:23233665}.

Pfam Domains GO Terms

CRISPR Data

Compound Hit Most Correlated Genes in Chemogenomics Tissues where Essential in the Avana Dataset (DepMap 20Q1)

Global Fraction of Cell Lines Where Essential: 68/726

Tissue	Fraction Of Cell Lines Where Essential
1290807.0	0/1
909776.0	0/1
bile duct	1/28
blood	1/28
bone	2/25
breast	3/33
central nervous system	7/56
cervix	0/4
colorectal	0/17
esophagus	2/13
fibroblast	0/1
gastric	4/15
kidney	1/21
liver	3/20
lung	9/75
lymphocyte	0/14
ovary	2/26
pancreas	1/24
peripheral nervous system	1/16
plasma cell	0/15
prostate	0/1
skin	2/24
soft tissue	0/7
thyroid	0/2
upper aerodigestive	4/22
urinary tract	3/29
uterus	0/5

Essentiality in NALM6

Essentiality Rank: 2470
Expression level (log2 read counts): 3.71

Expression Distribution

Screen	Score
Olaparib 4μM R08 exp512	-2.46
Etoposide 0.1μM R05 exp198	-2.34
Campthothecin 0.001μM R06 exp270	-2.31

Gene	Correlation
SWSAP1	0.421
RNF168	0.418

zf-C3HC4
FHA

histone H2A K63-linked ubiquitination
spermatogenesis, exchange of chromosomal proteins
histone H2B ubiquitination
negative regulation of transcription elongation from RNA polymerase II promoter
sperm chromatin condensation
negative regulation of DNA-templated transcription, elongation
somatic recombination of immunoglobulin genes involved in immune response
isotype switching
somatic diversification of immunoglobulins involved in immune response
spermatid nucleus differentiation
histone H2A ubiquitination
somatic recombination of immunoglobulin gene segments
immunoglobulin production involved in immunoglobulin mediated immune response
regulation of transcription elongation from RNA polymerase II promoter
somatic diversification of immunoglobulins
somatic diversification of immune receptors via germline recombination within a single locus
somatic cell DNA recombination
protein K63-linked ubiquitination
histone ubiquitination
B cell activation involved in immune response
histone exchange
somatic diversification of immune receptors
chromosome, telomeric region
regulation of DNA-templated transcription, elongation
interstrand cross-link repair
protein K48-linked ubiquitination
double-strand break repair via nonhomologous end joining
site of double-strand break
non-recombinational repair
protein autoubiquitination
positive regulation of DNA repair
ATP-dependent chromatin remodeling
ubiquitin binding
positive regulation of response to DNA damage stimulus
ubiquitin ligase complex
lymphocyte activation involved in immune response
regulation of DNA repair
histone binding
nucleus organization
response to ionizing radiation