Mechanisms of distant enhancer action on DNA and in chromatin |
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Authors: | V M Studitsky |
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Institution: | (1) Department of Pharmacology, UMDNJ, Robert Wood Johnson Medical School, 675 Hoes Lane, Room 405, Piscataway, NJ 08854, USA |
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Abstract: | Enhancers and insulators are regulatory DNA sequences that can work over a large distance. Efficient action over a distance
clearly requires special mechanisms for facilitating communication between a regulatory region and its target. Studies from
our laboratory identified DNA supercoiling as primary factor that mediates efficient enhancer-promoter communication over
a distance in prokaryotes through a “DNA slithering” mechanism. These studies allowed rational design and construction of
an insulator that can block enhancer action over a distance both in vitro and in vivo. Our most recent studies suggest that
eukaryotic chromatin structure can support action over a distance using similar principles, but in a mechanistically distinct
way.
Published in Russian in Molekulyarnaya Biologiya, 2009, Vol. 43, No. 2, pp. 204–214.
The article was translated by the author. |
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Keywords: | |
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