Enables protein kinase activity. Acts upstream of or within JNK cascade; cell morphogenesis; and negative regulation of extrinsic apoptotic signaling pathway in absence of ligand. Predicted to be located in aggresome; cytosol; and nucleus. Is expressed in central nervous system; liver; and retina. Orthologous to human STRADB (STE20 related adaptor beta). [provided by Alliance of Genome Resources, Apr 2022]