Serine/threonine-protein kinase (By similarity). Has a role in meiosis (PubMed:16303567). ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-[protein] ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-threonyl-[protein] Belongs to the STK19 family.