Predicted to enable several functions, including IkappaB kinase complex binding activity; JUN kinase kinase kinase activity; and protein homodimerization activity. Involved in several processes, including positive regulation of JUN kinase activity; positive regulation of branching morphogenesis of a nerve; and positive regulation of cell projection organization. Predicted to be located in membrane. Is expressed in diencephalon lateral wall mantle layer; dorsal grey horn; late tubule; midbrain mantle layer; and ureter. Orthologous to human MAP3K13 (mitogen-activated protein kinase kinase kinase 13). [provided by Alliance of Genome Resources, Apr 2022]