PNUTS, or Protein phosphatase 1 regulatory subunit 10, is a human gene encoded by PPP1R10. It may also be known as: Serine/threonine-protein phosphatase 1 regulatory subunit 10; PP1-binding protein of 114 kDa; Phosphatase 1 nuclear targeting subunit; Protein FB19; p99; MHC class I region proline-rich protein CAT53; HLA-C associated transcript 53; CAT53; FB19; PP1R10; R111; protein phosphatase 1, regulatory subunit 10. The encoded protein has an amino acid length of 940 and a mass of 99.1 kDa. Other isoforms may exist. Homologs of this gene exist in other organisms, including: Fly, Rat, Frog.