The C. elegans homolog of the p53 tumor suppressor is required for DNA damage-induced apoptosis

Bjorn Schumacher, Kay Hofmann, Simon Boulton, Anton Gartner

    Research output: Contribution to journalArticle

    254 Citations (Scopus)

    Abstract

    In mammals, one of the key regulators necessary for responding to genotoxic stress is the p53 transcription factor. p53 is the single most commonly mutated tumor suppressor gene in human cancers [1]. Here we report the identification of a C. elegans homolog of mammalian p53. Using RNAi and DNA cosuppression technology, we show that C. elegans p53 (cep-1) is required for DNA damage-induced apoptosis in the C. elegans germline. However, cep-1 RNAi does not affect programmed cell death occurring during worm development and physiological (radiation-independent) germ cell death. The DNA binding domain of CEP-1 is related to vertebrate p53 members and possesses the conserved residues most frequently mutated in human tumors. Consistent with this, CEP-1 acts as a transcription factor and is able to activate a transcriptional reporter containing consensus human p53 binding sites. Our data support the notion that p53-mediated transcriptional regulation is part of an ancestral pathway mediating DNA damage-induced apoptosis and reveals C. elegans as a genetically tractable model organism for studying the p53 apoptotic pathway.
    Original languageEnglish
    Pages (from-to)1722-1727
    Number of pages6
    JournalCurrent Biology
    Volume11
    Issue number21
    DOIs
    Publication statusPublished - Oct 2001

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