Effects of cell cycle dependent histone H1 phosphorylation on chromatin structure and chromatin replication - PubMed (original) (raw)

Effects of cell cycle dependent histone H1 phosphorylation on chromatin structure and chromatin replication

L Halmer et al. Nucleic Acids Res. 1996.

Abstract

We have reconstituted salt-treated SV40 minichromosomes with differentially phosphorylated forms of histone H1 extracted from either G0-, S- or M-phase cells. Sedimentation studies revealed a clear difference between minichromosomes reconstituted with S-phase histone H1 compared with histone H1 from G0- or M-phase cells, indicating that the phosphorylation state of histone H1 has a direct effect on chromatin structure. Using reconstituted minichromosomes as substrate in the SV40 in vitro replication system, we measured a higher replication efficiency for SV40 minichromosomes reconstituted with S-phase histone H1 compared with G0- or M-phase histone H1. These data indicate that the chromatin structure induced by the phosphorylation of histone H1 influences the replication efficiency of SV40 minichromosomes in vitro.

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