Journal
JOURNAL OF BIOLOGICAL CHEMISTRY
Volume 275, Issue 48, Pages 37469-37473Publisher
AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
DOI: 10.1074/jbc.M006990200
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The tumor suppresser protein p53 is critical for guarding the genome from incorporation of damaged DNA (Lane, D. P. (1992) Nature 358, 15-16). A relevant stress that activates p53 function is UV light (Noda, A, Toma-Aiba, Y., and Fujiwara, Y. (2000) Oncogene 19, 21-31). Another well known component of the mammalian UV response is the transcription factor c-Jun (Angel, P., and Karin, M. (1991) Biochim. Biophys. Acta 1072, 129-157). We show here that upon UV irradiation p53 activates transcription of the human mismatch repair gene MSH2. Interestingly, this up-regulation critically depends on functional interaction with c-Jun. Hence, the synergistic interaction of a proto-oncogene with a tumor suppresser gene is required for the regulation of the mammalian stress response through activation of expression of MSH2.
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