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High rotational mobility of DNA in animal cells and its modulation by histone acetylation by W. A. Krajewski; A. N. Luchnik is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is High rotational mobility of DNA in animal cells and its modulation by histone acetylation about?

DNA rotational mobility in a bovine papilloma virus (BPV)-based minichromosome, autonomously replicating in mouse cells, was studied using topoisomer analysis in temperature shift experiments. It was found that in live cells the average number of topological turns increased by six in the course of temperature shift through a range of 37 degrees C. This comprised approximately 85% of the total potential mobility of naked plasmid DNA. DNA rotation in isolated nuclei was found to be 3.5-4.0 turns per 37 degrees C in 100 mM NaCl - much higher than in all experiments with animal cells reported thus far. In low salt mobility was considerably lowered. Attempts to extract minichromosomes from nuclei allowed isolation of no more than 10% of minichromosomal DNA, with could indicate a very high proportion of transcriptionally active minichromosomes in the intracellular population. Growing cells in the presence of sodium butyrate resulted not only in an increase in the level of plasmid superhelicity and a decrease of its transcription (as we report in the accompanying publication) but also reduced rotational mobility of plasmid DNA threefold (from 6 to 2 turns per 37 degrees C). The decrease i

Who reads High rotational mobility of DNA in animal cells and its modulation by histone acetylation?

Author

W. A. Krajewski; A. N. Luchnik

Publisher

Springer; Springer-Verlag; Springer Verlag; Springer Science and Business Media LLC (ISSN 0026-8925)

Published

1991

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)