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Exp Cell Res. 1998 Jul 10;242(1):235-43.

Chromatin relaxation by overexpression of mutant p53, HPV16-E6, or cyclin G transgenes.

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Division of Basic Science, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA.


In this study, using a cell line that carries endogenous wild-type p53 genes, we show that transfection of cells with mutant p53, HPV16-E6, or cyclin G transgenes results in the disruption of higher-order chromatin structure, as evidenced by enhanced sensitivity to micrococcal nuclease. Multiple mechanisms may contribute to this phenotype, including histone H1 phosphorylation, direct binding of oncoproteins to nuclear matrix attachment sites, and altered expression of component genes of the p53 pathway, whose products may function in maintenance of chromatin structure.

[Indexed for MEDLINE]

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