Acts as a tumor suppressor in many tumor types; induces growth arrest or apoptosis depending on the physiological circumstances and cell type. Involved in cell cycle regulation as a trans-activator that acts to negatively regulate cell division by controlling a set of genes required for this process. One of the activated genes is an inhibitor of cyclin-dependent kinases. Apoptosis induction seems to be mediated either by stimulation of BAX and FAS antigen expression, or by repression of Bcl-2 expression. Prevents CDK7 kinase activity when associated to CAK complex in response to DNA damage, thus stopping cell cycle progression.
Specificity
Natural and recombinant Mouse Cellular tumor antigen p53
Subcellular Location
Cytoplasm Nucleus Endoplasmic reticulum Nucleus PML body Interaction with BANP promotes nuclear localization. Recruited into PML bodies together with CHEK2.
Binds DNA as a homotetramer. Found in a complex with CABLES1 and TP73. Interacts with histone acetyltransferases EP300 and methyltransferases HRMT1L2 and CARM1, and recruits them to promoters. The C-terminus interacts with TAF1, when TAF1 is part of the TFIID complex. Interacts with HIPK1, HIPK2, AXIN1, and P53DINP1. Part of a complex consisting of TP53, HIPK2 and AXIN1. Interacts with WWOX. Interacts with USP7 and SYVN1. Interacts with HSP90AB1. Interacts with YWHAZ; the interaction enhances TP53 transcriptional activity. Phosphorylation of YWHAZ on 'Ser-58' inhibits this interaction (By similarity). Interacts with PML (via C-terminus). Interacts with MDM2; leading to ubiquitination and proteasomal degradation of TP53. Directly interacts with FBXO42; leading to ubiquination and degradation of TP53. Interacts with DAXX. Interacts (when monomethylated at Lys-376) with L3MBTL1 (By similarity). Interacts with BANP, CDKN2AIP, NUAK1, STK11/LKB1 and E4F1. Interacts with CHD8, leading to recruit histone H1 and prevent transactivation activity. Interacts with AURKA, TRIM24 and BRD7. Interacts with GRK5. Binds to the CAK complex (CDK7, cyclin H and MAT1) in response to DNA damage. Interacts with CDK5 in neurons. Phosphorylated at Ser-309 and Ser-386 by CDK2 in response to DNA-damage.