Enables IkappaB kinase activity; K48-linked polyubiquitin modification-dependent protein binding activity; and ubiquitin protein ligase binding activity. Involved in several processes, including interleukin-17-mediated signaling pathway; mRNA stabilization; and positive regulation of type I interferon-mediated signaling pathway. Predicted to be located in PML body and mitochondrial membrane. Predicted to be active in cytoplasm. Is expressed in several structures, including future brain; sensory organ; submandibular gland primordium; thymus primordium; and turbinate bone primordium. Orthologous to human IKBKE (inhibitor of nuclear factor kappa B kinase subunit epsilon). [provided by Alliance of Genome Resources, Apr 2022]