Effects of pH on the stability of chromatin core particles.

Abstract:

:Chromatin core particles near physiological ionic strength undergo a reversible transition induced by changes in pH near neutrality. While sedimentation studies indicate no significant effect on size or shape, changes in tyrosine fluorescence anisotropy and in circular dichroism suggest a somewhat looser structure at high pH. Further support of this suggestion is given by high salt dissociation experiments; at pH 8 core particles begin to show changes at lower salt concentration than at pH 6. The pH transition appears unaffected by the presence of Mg2+ but can be blocked by crosslinking of the histones. A possible relationship is suggested between this transition and increases in intracellular pH which correlate with enhancement in several aspects of cellular activity including DNA replication.

journal_name

Nucleic Acids Res

journal_title

Nucleic acids research

authors

Libertini LJ,Small EW

doi

10.1093/nar/12.10.4351

subject

Has Abstract

pub_date

1984-05-25 00:00:00

pages

4351-9

issue

10

eissn

0305-1048

issn

1362-4962

journal_volume

12

pub_type

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