TP53 - Cellular tumor antigen p53 - human protein (Medical)
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TP53 »  Cellular tumor antigen p53
Protein also known as:  Tumor suppressor p53.
Gene name:  TP53
Family name: P53
Entry whose protein(s) existence is based on evidence at protein level
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1 5960 9

Displayed isoform: Iso 1     



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TP53 is found in increased amounts in a wide variety of transformed cells. TP53 is frequently mutated or inactivated in about 60% of cancers. TP53 defects are found in Barrett metaplasia a condition in which the normally stratified squamous epithelium of the lower esophagus is replaced by a metaplastic columnar epithelium. The condition develops as a complication in approximately 10% of patients with chronic gastroesophageal reflux disease and predisposes to the development of esophageal adenocarcinoma.  
  • CuratedUniProtKB
Esophageal cancer (ESCR) [MIM:133239]: A malignancy of the esophagus. The most common types are esophageal squamous cell carcinoma and adenocarcinoma. Cancer of the esophagus remains a devastating disease because it is usually not detected until it has progressed to an advanced incurable stage. The disease is caused by mutations affecting the gene represented in this entry.  
  • CuratedUniProtKB
Li-Fraumeni syndrome (LFS) [MIM:151623]: Autosomal dominant familial cancer syndrome that in its classic form is defined by the existence of a proband affected by a sarcoma before 45 years with a first degree relative affected by any tumor before 45 years and another first degree relative with any tumor before 45 years or a sarcoma at any age. Other clinical definitions for LFS have been proposed (PubMed:8118819 and PubMed:8718514) and called Li-Fraumeni like syndrome (LFL). In these families affected relatives develop a diverse set of malignancies at unusually early ages. Four types of cancers account for 80% of tumors occurring in TP53 germline mutation carriers: breast cancers, soft tissue and bone sarcomas, brain tumors (astrocytomas) and adrenocortical carcinomas. Less frequent tumors include choroid plexus carcinoma or papilloma before the age of 15, rhabdomyosarcoma before the age of 5, leukemia, Wilms tumor, malignant phyllodes tumor, colorectal and gastric cancers. The disease is caused by mutations affecting the gene represented in this entry.  
  • CuratedUniProtKB
Squamous cell carcinoma of the head and neck (HNSCC) [MIM:275355]: A non-melanoma skin cancer affecting the head and neck. The hallmark of cutaneous SCC is malignant transformation of normal epidermal keratinocytes. The gene represented in this entry is involved in disease pathogenesis.  
  • CuratedUniProtKB
Lung cancer (LNCR) [MIM:211980]: A common malignancy affecting tissues of the lung. The most common form of lung cancer is non-small cell lung cancer (NSCLC) that can be divided into 3 major histologic subtypes: squamous cell carcinoma, adenocarcinoma, and large cell lung cancer. NSCLC is often diagnosed at an advanced stage and has a poor prognosis. The disease is caused by mutations affecting the gene represented in this entry.  
  • CuratedUniProtKB
Papilloma of choroid plexus (CPP) [MIM:260500]: A benign tumor of neuroectodermal origin that generally occurs in childhood, but has also been reported in adults. Although generally found within the ventricular system, choroid plexus papillomas can arise ectopically in the brain parenchyma or disseminate throughout the neuraxis. Patients present with signs and symptoms of increased intracranial pressure including headache, hydrocephalus, papilledema, nausea, vomiting, cranial nerve deficits, gait impairment, and seizures. The disease is caused by mutations affecting the gene represented in this entry.  
  • CuratedUniProtKB
Adrenocortical carcinoma (ADCC) [MIM:202300]: A malignant neoplasm of the adrenal cortex and a rare childhood tumor. It occurs with increased frequency in patients with Beckwith-Wiedemann syndrome and Li-Fraumeni syndrome. The disease is caused by mutations affecting the gene represented in this entry.  
  • CuratedUniProtKB
Basal cell carcinoma 7 (BCC7) [MIM:614740]: A common malignant skin neoplasm that typically appears on hair- bearing skin, most commonly on sun-exposed areas. It is slow growing and rarely metastasizes, but has potentialities for local invasion and destruction. It usually develops as a flat, firm, pale area that is small, raised, pink or red, translucent, shiny, and waxy, and the area may bleed following minor injury. Tumor size can vary from a few millimeters to several centimeters in diameter. Disease susceptibility is associated with variations affecting the gene represented in this entry.  
  • CuratedUniProtKB
According to Orphanet, this protein is involved in the following diseases:
Adrenocortical carcinoma  1501  
B-cell chronic lymphocytic leukemia  67038  
Essential thrombocythemia  3318  
Familial pancreatic carcinoma  1333  
Giant cell glioblastoma  251579  
Gliosarcoma  251576  
Li-Fraumeni syndrome  524  
Papilloma of choroid plexus  2807  
Precursor B-cell acute lymphoblastic leukemia  99860  


Disease mutation  definition   [KW-0225]
Li-Fraumeni syndrome  definition   [KW-0435]
Tumor suppressor  definition   [KW-0043]
Technical term 
Reference proteome  definition   [KW-1185]

Further external links

Organism-specific databases
CTD: 7157
MIM: 260500
MIM: 211980 [ phenotype ]
MIM: 202300
MIM: 151623
MIM: 614740
MIM: 133239
MIM: 275355
MIM: 191170 [ gene+phenotype ]
PharmGKB: PA36679
Polymorphism databases
DMDM: 269849759
Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care.