Enables protein kinase activity. Involved in several processes, including cellular response to interferon-gamma; long-chain fatty acid import into cell; and peptidyl-serine phosphorylation. Acts upstream of or within several processes, including behavioral fear response; cellular response to hormone stimulus; and protein kinase B signaling. Located in mitochondrion. Is expressed in several structures, including central nervous system; early conceptus; olfactory epithelium; reproductive system; and retina nuclear layer. Orthologous to human RPS6KB1 (ribosomal protein S6 kinase B1). [provided by Alliance of Genome Resources, Apr 2022]