Enables magnesium ion binding activity and protein serine/threonine kinase activity. Involved in peptidyl-serine phosphorylation and spermatid development. Located in acrosomal vesicle and centriole. Is expressed in embryo; seminiferous tubule; spermatid; and testis. Orthologous to human TSSK2 (testis specific serine kinase 2). [provided by Alliance of Genome Resources, Apr 2022]