CK17, or Keratin 17, type I, is a human gene encoded by KRT17. It may also be known as: Keratin, type I cytoskeletal 17; Cytokeratin-17; CK-17; Keratin-17; K17; PC2; PCHC1. The encoded protein has an amino acid length of 432 and a mass of 48.1 kDa. CK17 is a member of the Intermediate filament family. Homologs of this gene exist in other organisms, including: Mouse, Zebrafish.