CDKN1C (Cyclin-Dependent Kinase Inhibitor 1C): CDKN1C is a gene that encodes the cyclin-dependent kinase inhibitor p57^Kip2, which regulates the cell cycle by inhibiting cyclin-CDK complexes. It plays a critical role in controlling cell growth and development. Mutations in CDKN1C are associated with overgrowth disorders such as Beckwith-Wiedemann syndrome and Silver-Russell syndrome.