Journal
FEBS LETTERS
Volume 579, Issue 23, Pages 5119-5122Publisher
WILEY
DOI: 10.1016/j.febslet.2005.07.095
Keywords
higher-order structure of DNA; transcriptional activity; circular DNA; DNA compaction; spermine
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We compared the transcriptional activities of the circular and linear forms of short (4 kbp) and giant (106 kbp) DNA molecules in the presence of a polyamine, spermine (4+). With an increase in the spermine concentration, transcriptional activity was enhanced, followed by an inhibitory effect, and complete inhibition was observed in the sole case of long, linear templates. A difference between the transcriptional properties of circular and linear conformations is found for giant DNA molecules. These results are discussed in relation to DNA conformational transitions. (c) 2005 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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