Enables ATP binding activity and protein serine/threonine kinase activity. Involved in intracellular signal transduction and protein phosphorylation. Is expressed in several structures, including alimentary system; genitourinary system; hemolymphoid system; liver; and lung. Orthologous to human MAP4K1 (mitogen-activated protein kinase kinase kinase kinase 1). [provided by Alliance of Genome Resources, Apr 2022]