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. 1994 Oct 17;13(20):4816-22.
doi: 10.1002/j.1460-2075.1994.tb06807.x.

Cyclin G is a transcriptional target of the p53 tumor suppressor protein

K Okamoto  1 , D Beach
Affiliations

Cyclin G is a transcriptional target of the p53 tumor suppressor protein

K Okamoto et al. EMBO J. .

Abstract

Through a PCR-based differential screening method, cyclin G was identified as a novel transcriptional target of the p53 tumor suppressor gene product. In both a mouse p53 temperature-sensitive leukemic cell line and mouse embryonic fibroblasts (MEF) after gamma-irradiation, cyclin G mRNA was rapidly induced. MEF from a p53-deficient mouse expressed cyclin G at a level > 10-fold lower than that from a wild-type mouse. Using a DNA binding assay, a specific p53 binding site was identified upstream from the cyclin G gene, which functioned as a p53-dependent cis-acting element in a transient transfection assay. These results suggest that cyclin G might participate in a p53-mediated pathway to prevent tumorigenesis.

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