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tumour protein p53

ال TP53 gene provides instructions for making a protein called tumour protein p53 (or p53). This protein acts as a tumour suppressor, which means that it regulates cell division by keeping cells from growing and dividing (proliferating) too fast or in an uncontrolled way.

Normal function

ال TP53 gene provides instructions for making a protein called tumour protein p53 (or p53). This protein acts as a tumour suppressor, which means that it regulates cell division by keeping cells from growing and dividing (proliferating) too fast or in an uncontrolled way.

The p53 protein is located in the nucleus of cells throughout the body, where it attaches (binds) directly to DNA. When the DNA in a cell becomes damaged by agents such as toxic chemicals, radiation, or ultraviolet (UV) rays from sunlight, this protein plays a critical role in determining whether the DNA will be repaired or the damaged cell will self-destruct (undergo apoptosis). If the DNA can be repaired, p53 activates other genes to fix the damage. If the DNA cannot be repaired, this protein prevents the cell from dividing and signals it to undergo apoptosis. By stopping cells with mutated or damaged DNA from dividing, p53 helps prevent the development of tumours.

Because p53 is essential for regulating DNA repair and cell division, it has been nicknamed the "guardian of the genome."

Conditions referring to this gene or chromosome

Other names

antigen NY-CO-13

cellular tumour antigen p53

P53

P53 tumour suppressor

P53_HUMAN

phosphoprotein p53

transformation-related protein 53

TRP53

tumour protein p53 (Li-Fraumeni syndrome)

tumour suppressor p53

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