The Δ133p53 Isoforms, Tuners of the p53 Pathway

Cancers
Sebastien M JoruizC C Harris

Abstract

The TP53 gene is a critical tumor suppressor and key determinant of cell fate which regulates numerous cellular functions including DNA repair, cell cycle arrest, cellular senescence, apoptosis, autophagy and metabolism. In the last 15 years, the p53 pathway has grown in complexity through the discovery that TP53 differentially expresses twelve p53 protein isoforms in human cells with both overlapping and unique biologic activities. Here, we summarize the current knowledge on the Δ133p53 isoforms (Δ133p53α, Δ133p53β and Δ133p53γ), which are evolutionary derived and found only in human and higher order primates. All three isoforms lack both of the transactivation domains and the beginning of the DNA-binding domain. Despite the absence of these canonical domains, the Δ133p53 isoforms maintain critical functions in cancer, physiological and premature aging, neurodegenerative diseases, immunity and inflammation, and tissue repair. The ability of the Δ133p53 isoforms to modulate the p53 pathway functions underscores the need to include these p53 isoforms in our understanding of how the p53 pathway contributes to multiple physiological and pathological mechanisms. Critically, further characterization of p53 isoforms may identify nove...Continue Reading

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Citations

Dec 18, 2020·Sensors·Anna Rita Bizzarri, Salvatore Cannistraro
Apr 8, 2021·Cellular and Molecular Life Sciences : CMLS·Olga Sokolova, Michael Naumann
Jun 12, 2021·Journal for Immunotherapy of Cancer·Kevin Jan LegschaHakim Echchannaoui

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