p53 it ripari DNA demaged fragments.
Gerard P. Zambetti has written: 'The p53 tumor suppressor pathway and cancer' -- subject(s): P53 antioncogene, P53 protein
p53 is a gene that codes for a protein (p53) that is an important tumor suppressor. Although the number of pathways and roles of p53 continue to expand it is, perhaps, most well known for slowing cell proliferation or inducing apoptosis if DNA damage or uncontrolled growth is detected.
The p53 is the tumor suppressor protein that regulates cell cycles and hence has a role in preventing cancer.
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P53 it is an anzyme that monitorize the DNA and protect them from demagis.It is founded that its defective in 60% of cancer cells
A defective P53 gene is likely to cause poor regulation of cell cycles. P53 is a protein that suppresses tumor production and is implicated as a factor in cancer development. It prevents genome mutation and damage. 50% of human tumors have mutated or deleted P53 genes.
The p53 gene was identified in 1979 by Arnold Levine, David Lane, and William Old. It wasn't until 1989 that the gene was found to be a tumor suppressor.
p53 (also known as protein 53 or tumor protein 53), is a tumor suppressor protein that in humans is encoded by the TP53gene. p53 is crucial in multicellular organisms, where it regulates the cell cycle and, thus, functions as a tumor suppressorthat is involved in preventing cancer. As such, p53 has been described as "the guardian of the genome" because of its role in conserving stability by preventing genome mutation.The name p53 is in reference to its apparent molecular mass: It runs as a 53-kilodalton (kDa) protein on SDS-PAGE. But, based on calculations from its amino acid residues, p53's mass is actually only 43.7 kDa. This difference is due to the high number of prolineresidues in the protein, which slows its migration on SDS-PAGE, thus making it appear heavier than it actually is. This effect is observed with p53 from a variety of species, including humans, rodents, frogs, and fish..
The p53 Tumour suppressor gene is located on chromosome 17. As its name suggests, it has an anti-tumour activity. That involves the overseeing of the cell cycle. If either the cell or the DNA is impaired, p53 activates the production of specific chemicals (like p21 protein), which interferes with the cell cycle. Depending on the nature/extent of the damage, its either repaired, thus cell cycle is allowed to continue, or p53 initiate apoptosis (cell death). This mechanism would effectively stop the proliferation of infected (malignant) cells, however, p53 itself (or any of genes/chemicals p53 regulates) could be damaged/mutated. In the inherited condition, Li-Fraumeni syndrome, for example, only one functional copy of p53 gene is inherited (instead of two), which interferes with its normal function.
Cell division is regulated by the p53 gene and relates to cancer because Cancer is caused by uncontrolled cell divison
p53 normally functions as a tumor suppressor to stop the cell cycle after DNA damage occurs.