UV-C-induced DNA damage leads to p53-dependent nuclear trafficking of PML

Hasan Seker, Carlos Rubbi, Steven P. Linke, Elise D. Bowman, Susan Garfield, Laura A. Hansen, Katherine L B Borden, Jo Milner, Curtis C. Harris

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Abstract

The promyelocytic leukemia protein (PML) is a nuclear phosphoprotein that localizes to distinct domains in the nucleus, described as PML nuclear bodies (PML-NBs). Recent findings indicate that PML regulates the p53 response to oncogenic signals. Here, we define a p53-dependent role for PML in response to DNA damage. We exposed cells to ultraviolet light (UV-C) and imaged the nuclear distribution of PML, p53, and the BLM helicase by confocal microscopy. After DNA damage, PML partially relocated out of the PML-NBs, and colocalized with BLM and p53 at sites of DNA repair. In addition, using the isogenic HCT116 cell lines (p53 + / + and -/-), we show that the redistribution of PML was dependent on functional p53. Western analysis revealed that the level of PML protein remained unaltered after UV-C treatment. These results are consistent with the hypothesis that PML, in conjunction with p53 and BLM, contributes to the cellular response to UV-C-induced DNA damage and its repair.

Original languageEnglish
Pages (from-to)1620-1628
Number of pages9
JournalOncogene
Volume22
Issue number11
DOIs
Publication statusPublished - Mar 20 2003

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All Science Journal Classification (ASJC) codes

  • Molecular Biology
  • Cancer Research
  • Genetics

Cite this

Seker, H., Rubbi, C., Linke, S. P., Bowman, E. D., Garfield, S., Hansen, L. A., ... Harris, C. C. (2003). UV-C-induced DNA damage leads to p53-dependent nuclear trafficking of PML. Oncogene, 22(11), 1620-1628. https://doi.org/10.1038/sj.onc.1206140