Study encourages cautious approach to CRISPR therapeutics

A comprehensive study—conducted by researchers at Sanford Burnham Prebys, the National Cancer Institute (NCI) and other groups—has shown that gene editing, specifically gene knockout (KO), with CRISPR -Cas9 can favor ...

Oncology & Cancer

How chronic intestinal inflammation can cause cancer

Chronic inflammatory bowel disease (IBD) are inflammations of the gastrointestinal tract which flare up in phases and are accompanied by bloody bowel movements, diarrhea and severe impairment of the quality of life. IBD patients ...

Oncology & Cancer

Researchers find a new therapeutic target in pancreatic cancer

The development of pancreatic cancer is driven by co-existing mutations in an oncogene involved in controlling cell growth, called KRAS, and in a tumor suppressor gene, called p53. But how these mutations cooperate to promote ...

Oncology & Cancer

Finding familiar pathways in kidney cancer

p53 is the most famous cancer gene, not least because it's involved in causing over 50% of all cancers. When a cell loses its p53 gene—when the gene becomes mutated—it unleashes many processes that lead to the uncontrolled ...

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 ...

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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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