Involved in ubiquitination and subsequent proteasomal degradation of target proteins (PubMed:24563205). Associates with the CDD complex and mediates the recognition of specific substrates for CUL4-RING E3 ubiquitin ligase (CRL4) by interacting with ubiquitination targets (PubMed:24563205). Binds to the abscisic acid (ABA) receptor PYL8 (required for ABA-mediated responses) and promotes its proteasomal degradation (PubMed:24563205). Acts as negative regulator of ABA-mediated developmental responses, including inhibition of seed germination, seedling establishment, and root growth (PubMed:24563205). Associates with the CDD complex, formed by COP10, DET1 and DDB1 (PubMed:24563205). Interacts directly with DDB1A and DDB1B (PubMed:24563205). Interacts with PYL4, PYL8, and PYL9 (PubMed:24563205). Interacts with SGF11 (PubMed:30192741). Displays a rather patchy distribution forming a punctuated pattern in the euchromatin (PubMed:30192741). Does not localize in the heterochromatic chromocenters or nucleolus (PubMed:30192741). Belongs to the DDA1 family.