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Checkpoint Signaling and DNA Repair: p53
 
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Protein : p53

SwissProt Accessions | Entrez Gene links

Connectivity 3212
Notes Tumor protein p53, a nuclear protein, plays an essential role in the regulation of cell cycle, specifically in the transition from G0 to G1. It is found in very low levels in normal cells, however, in a variety of transformed cell lines, it is expressed in high amounts, and believed to contribute to transformation and malignancy. p53 is a DNA-binding protein containing DNA-binding, oligomerization and transcription activation domains. It is postulated to bind as a tetramer to a p53-binding site and activate expression of downstream genes that inhibit growth and/or invasion, and thus function as a tumor suppressor. Mutants of p53 that frequently occur in a number of different human cancers fail to bind the consensus DNA binding site, and hence cause the loss of tumor suppressor activity. Alterations of the TP53 gene occur not only as somatic mutations in human malignancies, but also as germline mutations in some cancer-prone families with Li-Fraumeni syndrome.
Hugo ID 11998
Name p53
Description transformation related protein 53
URN urn:agi-llid:7157

GO Cellular Component cytoplasm
cytosol
nucleus
mitochondrion
nucleolus

Cell Localization Nucleus

GO Biological Process DNA damage response, signal transduction by p53 class mediator
apoptosis
negative regulation of cell cycle
negative regulation of cell growth
protein-nucleus import, translocation
regulation of transcription from Pol II promoter
regulation of transcription, DNA-dependent
transcription
DNA damage response, signal transduction by p53 class mediator resulting in induction of apoptosis
cell cycle
negative regulation of DNA replication
negative regulation of apoptosis
negative regulation of fibroblast proliferation
regulation of cell proliferation
response to DNA damage stimulus
response to UV
response to X-ray
caspase activation via cytochrome c
cell aging
cell cycle arrest
cell cycle checkpoint
cell differentiation
cell proliferation
induction of apoptosis by hormones
negative regulation of helicase activity
nucleotide-excision repair
regulation of mitochondrial membrane permeability

MGI ID 98834

Swiss-Prot Accession  P04637

OMIM ID OMIM:191170
OMIM:202300
OMIM:114480
OMIM:114500
OMIM:114550
OMIM:151623
OMIM:161550
OMIM:260350

Alias Tp53
p53
Trp53
tumor protein p53 (Li-Fraumeni syndrome)
transformation related protein 53
P53_HUMAN
cellular tumor antigen p53
Phosphoprotein p53
similar to p53 alternative splice isoform p35/HAS
similar to transformation related protein 53
tumor protein p53
Tumor suppressor p53
P-53

Organism Rattus norvegicus
Mus musculus
Human

Entrez ID  24842
22059
7157

RGD ID 3889

Pathway RB Tumor Suppressor
SAPK-JNK Signaling
Mitochondrial control of Apoptosis
p53 Signaling
ATM signaling
Apoptosis
GSK3 50
GSK3
AKT signaling
DNA Repair
PL AKT signaling
'GSK3 50' plus

Unigene ID Rn.54443
Mm.222
Hs.408312

Group Transcription factors
nucleotide binding
metal ion binding