Enables chromatin binding activity. Acts upstream of or within several processes, including meiosis I; mitotic cell cycle phase transition; and regulation of transcription by RNA polymerase II. Predicted to be part of SCF ubiquitin ligase complex and cyclin-dependent protein kinase holoenzyme complex. Is expressed in branchial arch; cerebellum; and cerebral cortex. Orthologous to human CKS2 (CDC28 protein kinase regulatory subunit 2). [provided by Alliance of Genome Resources, Apr 2022]