Enables kinase activity. Predicted to be involved in several processes, including protein stabilization; regulation of cyclin-dependent protein serine/threonine kinase activity; and transcription initiation from RNA polymerase II promoter. Located in nucleus. Is expressed in cerebellum; cranium; and limb mesenchyme. Orthologous to human CCNH (cyclin H). [provided by Alliance of Genome Resources, Apr 2022]