Biophysical Journal 53: 477-487 (1988)
© 1988 the Biophysical Society

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Histone hyperacetylation. Its effects on nucleosome core particle transitions.

Department of Biochemistry and Biophysics, Oregon State University, Corvallis 97331.

ABSTRACT

Effects of histone hyperacetylation on transitions of HeLa cell nucleosome core particles were studied. The transitions examined were induced by low salt concentrations, pH, temperature, and nondissociating high salt. Effects of salt dissociation were also examined. The low-salt transition was found to shift to higher ionic strength by approximately three fold for hyperacetylated particles, a change which may be due simply to the increased overall negative charge on the particles caused by acetylation of lysine residues. Some differences were also seen in the way in which core particles refold after exposure to very low salt (which induces a nonreversible change in the particles). Otherwise no significant effects of hyperacetylation were observed.

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