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DDB1
DDB1
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DDB1

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DDB1
Available structures
PDBOrtholog search: PDBe RCSB
Identifiers
AliasesDDB1, DDBA, UV-XAP1, XPCE, XPE, XPE-BF, damage specific DNA binding protein 1, WHIKERS
External IDsOMIM: 600045; MGI: 1202384; HomoloGene: 1448; GeneCards: DDB1; OMA:DDB1 - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_001923

NM_015735

RefSeq (protein)

NP_001914

NP_056550

Location (UCSC)Chr 11: 61.3 – 61.34 MbChr 19: 10.58 – 10.61 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

DNA damage-binding protein 1 is a protein that in humans is encoded by the DDB1 gene.[5][6][7]

Gene

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The gene's position is on chromosome 11q12-q13.[8]

Protein

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The DDB1 gene encodes the large subunit of DNA damage-binding protein, a heterodimer composed of a large and a small (DDB2) subunit. DDB1 contains 1140 amino acids, amounting to a mass of 127 kDa.[8]

Function

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As its name suggests, DDB1 was initially implicated in the process of a specific type of DNA repair known as nucleotide excision repair. Since then, researchers have found that DDB1 primarily functions as a core component of the CUL4A- and CUL4B-based E3 ubiquitin ligase complexes. DDB1 serves as a bridge or adaptor protein which interacts with dozens of proteins known as DDB1 and CUL4-associated factors (DCAFs).[9] These DCAFs are often ubiquitin ligase substrates and regulate numerous essential processes in the cell including DNA repair (DDB2), DNA replication, chromatin remodeling (Cdt2) and more.

Interactions

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References

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Further reading

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