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Schumacher, B; Hanazawa, M; Lee, M H; Nayak, S; Volkmann, K; Hofmann, E R; Hofmann, R; Hengartner, M O; Schedl, T; Gartner, A (2005). Translational repression of C. elegans p53 by GLD-1 regulates DNA damage-induced apoptosis. Cell, 120(3):357-368.

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p53 is a tumor suppressor gene whose regulation is crucial to maintaining genome stability and for the apoptotic elimination of abnormal, potentially cancer-predisposing cells. C. elegans contains a primordial p53 gene, cep-1, that acts as a transcription factor necessary for DNA damage-induced apoptosis. In a genetic screen for negative regulators of CEP-1, we identified a mutation in GLD-1, a translational repressor implicated in multiple C. elegans germ cell fate decisions and related to mammalian Quaking proteins. CEP-1-dependent transcription of proapoptotic genes is upregulated in the gld-1(op236) mutant and an elevation of p53-mediated germ cell apoptosis in response to DNA damage is observed. Further, we demonstrate that GLD-1 mediates its repressive effect by directly binding to the 3'UTR of cep-1/p53 mRNA and repressing its translation. This study reveals that the regulation of cep-1/p53 translation influences DNA damage-induced apoptosis and demonstrates the physiological importance of this mechanism.


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Additional indexing

Item Type:Journal Article, refereed
Communities & Collections:07 Faculty of Science > Institute of Molecular Life Sciences
Dewey Decimal Classification:570 Life sciences; biology
Date:11 February 2005
Deposited On:11 Feb 2008 12:20
Last Modified:05 Apr 2016 12:16
Publisher DOI:10.1016/j.cell.2004.12.009
Related URLs:http://www.cell.com/content/article/abstract?uid=PIIS0092867404011705
PubMed ID:15707894

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