Predicted to enable ubiquitin protein ligase binding activity and ubiquitin-protein transferase activity. Involved in in utero embryonic development and ribosome biogenesis. Acts upstream of or within several processes, including negative regulation of granulocyte differentiation; positive regulation of G1/S transition of mitotic cell cycle; and regulation of response to DNA damage stimulus. Predicted to be part of Cul4A-RING E3 ubiquitin ligase complex. Is expressed in several structures, including alimentary system; brain; cardiovascular system; genitourinary system; and musculoskeletal system. Orthologous to human CUL4A (cullin 4A). [provided by Alliance of Genome Resources, Apr 2022]