Protein phosphatase 1D (PPM1D)

Involved in the negative regulation of p53 expression (PubMed:23242139). Required for the aid of p53-dependent checkpoint mediated cell cycle arrest.

Binds to and dephosphorylates'Ser-15' of TP53 and'Ser-345' of CHEK1 which leads to the functional inactivation of these proteins (PubMed:15870257, PubMed:16311512). Mediates MAPK14 dephosphorylation and inactivation (PubMed:21283629).