Enables protein kinase regulator activity. Acts upstream of or within several processes, including nucleocytoplasmic transport; positive regulation of erythrocyte differentiation; and regulation of protein kinase activity. Located in cytoplasm; midbody; and nucleus. Is expressed in several structures, including branchial arch; central nervous system; gut; immune system; and limb bud. Orthologous to human ANKRD54 (ankyrin repeat domain 54). [provided by Alliance of Genome Resources, Apr 2022]