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DDB1

DNA damage-binding protein 1 is a protein that in humans is encoded by the DDB1 gene.

Gene
The gene's position is on chromosome 11q12-q13. ==Protein==
Protein
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. ==Function==
Function
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). 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 ==
Interactions
DDB1 has been shown to interact with Transcription initiation protein SPT3 homolog, GCN5L2, DDB2, CUL4A, CUL4B and P21. == References ==
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