. . . . . . . . . . . . . . . . . . . . . . "Biochemical Activity; Phenotypic Enhancement; Protein-peptide; Reconstituted Complex" . "An unspecified isoform of ATM interacts with and phosphorylates p53. This interaction was modeled on a demonstrated interaction between human ATM and p53 from an unspecified species." . "ATM phosphorylates p53 at serine 15." . "ATM phosphorylates p53 at Ser15." . "BIND" . "BioGRID" . "HPRD" .