Predicted to enable N6-isopentenyladenosine methylthiotransferase activity. Involved in positive regulation of cyclin-dependent protein serine/threonine kinase activity. Predicted to be located in mitochondrial inner membrane. Predicted to be active in cytosol and mitochondrion. Orthologous to human CDK5RAP1 (CDK5 regulatory subunit associated protein 1). [provided by Alliance of Genome Resources, Apr 2022]