Enables protein kinase activity. Predicted to be involved in protein stabilization; regulation of transcription by RNA polymerase II; and transcription initiation from RNA polymerase II promoter. Predicted to act upstream of or within DNA repair; cell division; and phosphorylation. Located in nucleus. Is expressed in embryo and future hindbrain. Orthologous to human CDK7 (cyclin dependent kinase 7). [provided by Alliance of Genome Resources, Apr 2022]