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  The paracentric inversion In(2Rh)PL alters the centromeric organization of chromosome 2 in Drosophila melanogaster

Chlamydas, S., Heun, P., Dimitri, P., Moschetti, R., Barsanti, P., & Caizzi, R. (2009). The paracentric inversion In(2Rh)PL alters the centromeric organization of chromosome 2 in Drosophila melanogaster. Chromosome Research, 17, 1-9.

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 Creators:
Chlamydas, Sarantis1, Author              
Heun, Patrick2, Author              
Dimitri, Patrizio, Author
Moschetti, Roberta, Author
Barsanti, Paolop, Author
Caizzi, Ruggiero, Author
Affiliations:
1Department of Epigenetics, Max Planck Institute of Immunobiology and Epigenetics, Max Planck Society, ou_2243644              
2Department of Cellular and Molecular Immunology, Max Planck Institute of Immunobiology and Epigenetics, Max Planck Society, ou_2243641              

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Free keywords: chromosomal inversion, breakpoint mapping, Drosophila melanogaster, CEN chromatin
 Abstract: Centromeres are complex structures involved in an evolutionarily conserved function, the correct segregation of chromosomes and chromatids during meiosis and mitosis. The centromere is determined by epigenetic processes that result in a particular nucleosome organization (CEN chromatin) that differs from the rest of the chromatin including the heterochromatin that normally surrounds the centromere in higher organisms. Many of the current models of centromere origin and organization rely on the molecular and cytological characterization of minichromosomes and their derivatives, and on studies on the origin and maintenance of neocentromeres. Here, we describe the peculiar centromere organization observed in In(2Rh)PL, a paracentric D. melanogaster inversion in which the centromere is maintained in its natural context but is directly flanked by a euchromatic domain as a result of the rearrangement. We have identified the breakpoints of the inversion and show that the proximal one is within the centromere region. The data presented suggest that, notwithstanding the loss of all the pericentric 2Rh heterochromatin, the centromere of the In(2Rh)PL chromosome is still active but presents a nucleosomal organization quite different from the organization usually observed in the centromeric region.

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Language(s): eng - English
 Dates: 2009
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 446585
 Degree: -

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Title: Chromosome Research
Source Genre: Journal
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Pages: - Volume / Issue: 17 Sequence Number: - Start / End Page: 1 - 9 Identifier: -