An antagonism between the telomeric and polycomb-dependent chromatin at the end of terminally deleted Drosophila melanogaster chromosomes

An antagonism between the telomeric and polycomb-dependent chromatin at the end of terminally... The results obtained at our laboratory during several last years suggest that a specific telomeric chromatin is formed at the terminal regions of Drosophila melanogaster DNA of 4–5 kb in length. In this work, we have studied how the telomeric chromatin influences the Polycomb-dependent repression. Many Polycomb proteins are involved in the formation of subtelomeric chromatin and inhibit the expression of a transgene inserted into it. However, the question on a positive or negative effect of telomeric chromatin on the assembly of subtelomeric protein complexes is yet open. Using a model system, in which a P element inserted upstream of the yellow gene promoter and located at the end of a terminally deleted chromosome can serve as a binding site for Pc-G proteins in the presence of ph p1 mutant allele, we have shown that a specific structure of the telomeric chromatin negatively influences the formation of Polycomb-dependent repression complex. These results suggest an antagonism between the telomeric and subtelomeric (Pc-G-dependent) chromatins. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Genetics Springer Journals

An antagonism between the telomeric and polycomb-dependent chromatin at the end of terminally deleted Drosophila melanogaster chromosomes

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Publisher
SP MAIK Nauka/Interperiodica
Copyright
Copyright © 2008 by Pleiades Publishing, Ltd.
Subject
Biomedicine; Microbial Genetics and Genomics; Animal Genetics and Genomics; Human Genetics
ISSN
1022-7954
eISSN
1608-3369
D.O.I.
10.1134/S1022795408110173
Publisher site
See Article on Publisher Site

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