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p53: a two-faced cancer gene

p53 is usually referred to as a commonly altered tumour suppressor gene. A new study supports a decade of accumulating evidence that mutated p53 protein can gain new functions and also behave as an oncogene. This study specifically suggests that certain p53 mutants gain the ability to inhibit the MRN–ATM signalling pathway.

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Figure 1: During the process of tumour progression, p53 function is lost in a high percentage of tumours, usually by loss of one p53 allele and missense mutation in the other.

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Kastan, M., Berkovich, E. p53: a two-faced cancer gene. Nat Cell Biol 9, 489–491 (2007). https://doi.org/10.1038/ncb0507-489

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