Molecular Target Synopsis
Overview
Domains and Structures
Drugs and Clinical Candidates
Druggability
Chemistry
Ligand Efficiency Plot
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Interaction Network
Gene Expression
Gene Copy Number Variation
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Tp53 (P02340) - Overview - Molecular Target Synopsis

Protein


Tp53, Cellular tumor antigen p53
UniProt P02340

Also Known as P53_MOUSE, Tp53, P53, Trp53

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. In cooperation with mitochondrial PPIF is involved in activating oxidative stress-induced necrosis; the function is largely independent of transcription. Prevents CDK7 kinase activity when associated to CAK complex in response to DNA damage, thus stopping cell cycle progression (By similarity). Induces the transcription of long intergenic non-coding RNA p21 (lincRNA-p21) and lincRNA-Mkln1. LincRNA-p21 participates in TP53-dependent transcriptional repression leading to apoptosis, but seems to have to effect on cell-cycle regulation. Regulates the circadian clock by repressing CLOCK-ARNTL/BMAL1-mediated transcriptional activation of PER2 (PubMed:24051492). Forms homodimers and homotetramers (By similarity). Binds DNA as a homotetramer. Interacts with AXIN1 (PubMed:15526030). Probably part of a complex consisting of TP53, HIPK2 and AXIN1 (PubMed:15526030). Interacts with histone acetyltransferases EP300 and methyltransferases HRMT1L2 and CARM1, and recruits them to promoters. Interacts (via C-terminus) with TAF1; when TAF1 is part of the TFIID complex. Interacts with ING4; this interaction may be indirect (PubMed:12702766). Found in a complex with CABLES1 and TP73 (PubMed:11706030). Interacts with HIPK1, HIPK2, and TP53INP1. Interacts with WWOX. Interacts with USP7 and SYVN1 (PubMed:14719112). Interacts with HSP90AB1. Interacts with CHD8; leading to recruit histone H1 and prevent transactivation activity (PubMed:19151705). Interacts with ARMC10, BANP, CDKN2AIP, NUAK1, STK11/LKB1, UHRF2 and E4F (PubMed:10644996). Interacts with YWHAZ; the interaction enhances TP53 transcriptional activity. Phosphorylation of YWHAZ on 'Ser-58' inhibits this interaction. Interacts (via DNA-binding domain) with MAML1 (via N-terminus). Interacts with MKRN1. Interacts with PML (via C-terminus). Interacts with MDM2; leading to ubiquitination and proteasomal degradation of TP53. Directly interacts with FBXO42; leading to ubiquitination and degradation of TP53. Interacts (phosphorylated at Ser-18 by ATM) with the phosphatase PP2A-PPP2R5C holoenzyme; regulates stress-induced TP53-dependent inhibition of cell proliferation. Interacts with PPP2R2A. Interacts with AURKA, DAXX, BRD7 and TRIM24 (PubMed:19556538). Interacts (when monomethylated at Lys-379) with L3MBTL1. Interacts with GRK5. Binds to the CAK complex (CDK7, cyclin H and MAT1) in response to DNA damage. Interacts with CDK5 in neurons. Interacts with AURKB, SETD2, UHRF2 and NOC2L. Interacts (via N-terminus) with PTK2/FAK1; this promotes ubiquitination by MDM2. Interacts with PTK2B/PYK2; this promotes ubiquitination by MDM2. Interacts with PRKCG. Interacts with PPIF; the association implicates preferentially tetrameric TP53, is induced by oxidative stress and is impaired by cyclosporin A (CsA). Interacts with SNAI1; the interaction induces SNAI1 degradation via MDM2-mediated ubiquitination and inhibits SNAI1-induced cell invasion. Interacts with KAT6A. Interacts with UBC9. Interacts with ZNF385B; the interaction is direct. Interacts (via DNA-binding domain) with ZNF385A; the interaction is direct and enhances p53/TP53 transactivation functions on cell-cycle arrest target genes, resulting in growth arrest (PubMed:17719541). Interacts with ANKRD2. Interacts with RFFL and RNF34; involved in p53/TP53 ubiquitination. Interacts with MTA1 and COP1. Interacts with CCAR2 (via N-terminus). Interacts with MORC3. Interacts (via C-terminus) with POU4F2 (via C-terminus). Interacts (via oligomerization region) with NOP53; the interaction is direct and may prevent the MDM2-mediated proteasomal degradation of TP53. Interacts with AFG1L; mediates mitochondrial translocation of TP53. Interacts with UBD (By similarity). Interacts with TAF6 (By similarity). Interacts with C10orf90/FATS; the interaction inhibits binding of TP53 and MDM2 (PubMed:24240685). Interacts with NUPR1; interaction is stress-dependent. Forms a complex with EP300 and NUPR1; this complex binds CDKN1A promoter leading to transcriptional induction of CDKN1A (By similarity). Interacts with PRMT5 in response to DNA damage; the interaction is STRAP dependent.

3EXJ
CRYSTAL STRUCTURE OF A P53 CORE TETRAMER BOUND TO DNA
RCSB/PDB
Inspect Structure
See all 3D Structures for Tp53

Isoforms / Transcripts (Protein Coding)


Protein Length Ensembl Gene Ensembl Transcript Ensembl Protein Uniprot Isoform
387P02340-1

Sub-cellular localization


UniProt: Tp53 is active in the following subcellular-locations: cytoplasm, endoplasmic reticulum, mitochondrion matrix, nucleus, pml body.
GO terms: Tp53 is active in the following subcellular-locations: chromatin, cytoplasm, cytosol, endoplasmic reticulum, mitochondrial matrix, mitochondrion, nuclear chromatin, nuclear matrix, nucleolus, nucleoplasm, nucleus, PML body, protein-containing complex, replication fork, site of double-strand break, transcription factor complex.



UniProt
GO terms

Gene Copy Number Variation


In COSMIC - Cell Lines Project Tp53 has gain in 0 cell-lines, loss in 0 cell-lines and no signal in 0 cell-lines. (see details)

3D Structures


For Tp53 there are:
8 structures (12 chains) solved
3 are solved in complex with at least one small molecule ligand



(see details)
Molecular Target 3D Synopsis

Screening and Chemistry


Tp53 has been screened with 18 compounds (30 bioactivities). (see details)