Oncology & Cancer

Rare developmental disorder linked to tumor-suppressing protein

CHARGE, which affects 1 in 10,000 babies, is an acronym whose letters stand for some of the more common symptoms of the condition: coloboma of the eye, heart defects, atresia of the choanae, retardation of growth and/or development, ...

Oncology & Cancer

Cancer suppressor gene links metabolism with cellular aging

The tumor suppressor protein p53 is an attractive target for drug developers. But this path has so far proven difficult, as most p53 regulatory proteins operate via protein-protein interactions, which make for poor drug targets, ...

Genetics

Genome-editing tool could increase cancer risk

Therapeutic use of gene editing with the CRISPR-Cas9 technique may inadvertently increase the risk of cancer, according to a new study from Karolinska Institutet, Sweden, and the University of Helsinki, Finland, published ...

Oncology & Cancer

Cancer cells and stem cells share same origin: study

Oncogenes are generally thought to be genes that, when mutated, change healthy cells into cancerous tumor cells. Scientists at the Keck School of Medicine of the University of Southern California (USC) have proven that those ...

Oncology & Cancer

Genetically modified virus combats prostate cancer

Researchers at the São Paulo State Cancer Institute (ICESP) in Brazil have used a genetically manipulated virus to destroy tumor cells upon injection into mice with prostate cancer. The virus also made tumor cells more sensitive ...

Oncology & Cancer

Team finds key to common cancer pathway

Scientists have long known that the protein p53, when mutated, is a critical factor in the onset of many different kinds of cancer. In its unmutated form, however, it is known to protect against cancer.

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P53

More reference expression data

p53 (also known as protein 53 or tumor protein 53), is a transcription factor which in humans is encoded by the TP53 gene. p53 is important in multicellular organisms, where it regulates the cell cycle and thus functions as a tumor suppressor that is involved in preventing cancer. As such, p53 has been described as "the guardian of the genome," "the guardian angel gene," and the "master watchman," referring to 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 43.7kDa. This difference is due to the high number of proline residues in the protein which slow 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.

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