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RAD18
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RAD18
Available structures
PDBOrtholog search: PDBe RCSB
Identifiers
AliasesRAD18, RNF73, E3 ubiquitin protein ligase, RAD18 E3 ubiquitin protein ligase
External IDsOMIM: 605256; MGI: 1890476; HomoloGene: 48572; GeneCards: RAD18; OMA:RAD18 - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_020165

NM_001167730
NM_021385
NM_001381931
NM_001381932
NM_001381933

RefSeq (protein)

NP_064550

NP_001161202
NP_067360
NP_001368860
NP_001368861
NP_001368862

Location (UCSC)Chr 3: 8.78 – 8.96 MbChr 6: 112.6 – 112.67 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

E3 ubiquitin-protein ligase RAD18 is an enzyme that in humans is encoded by the RAD18 gene.[5][6][7] A knockout in a human colorectal cancer cell line, HCT116, has also been created.[8]

Function

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The protein encoded by this gene is highly similar to S. cerevisiae DNA damage repair protein Rad18. Yeast Rad18 functions through interaction with Rad6, which is a ubiquitin-conjugating enzyme required for post-replication repair of damaged DNA. Similar to its yeast counterpart, this protein is able to interact with the human homolog of yeast Rad6 protein through a conserved ring finger motif. Mutation of this motif results in defective replication of UV-damaged DNA and hypersensitivity to multiple mutagens.[7]

RAD18 is an E3 ubiquitin ligase that enables movement of ubiquitin from a ubiquitin carrier to another protein (the substrate). One activity of RAD18 is to prevent replication fork collapse by promoting DNA translesion synthesis and template switching.[9] RAD18 is also involved in directing repair of DNA double-strand breaks by homologous recombination in post replicative chromatin.[9] RAD18 appears to promote homologous recombinational repair by recruiting the SMC5,SMC6 (SMC5/6) complex to the DNA breaks.[9]

Interactions

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RAD18 has been shown to interact with HLTF,[10] UBE2B[5][6] and UBE2A.[5][6]

References

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Further reading

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