Component of the CUL4-RBX1-DDB1-DCAF1 E3 ubiquitin-protein ligase complex, DCAF1 may function as the substrate recognition module within this complex. Appears to be required for plant embryogenesis and to affect several other developmental processes including leaf, shoot, and flower development. Protein modification; protein ubiquitination. Component of the CUL4-RBX1-DDB1-DCAF1 E3 ubiquitin-protein ligase complex. Interacts with DDB1A through its DWD motifs. Ubiquitous but predominantly expressed in the inflorescence and roots. The DWD boxes are required for interaction with DDB1A. Embryonic development is arrested at the globular stage. Belongs to the VPRBP/DCAF1 family.