ArticleChromosoma2009
Localization and characteristics of DNA underreplication zone in the 75C region of intercalary heterochromatin in Drosophila melanogaster polytene chromosomes.
Article in Chromosoma, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- DNA copy-number control through inhibition of replication fork progression.Cell reports · 2014Article
- Low levels of p53 protein and chromatin silencing of p53 target genes repress apoptosis in Drosophila endocycling cells.PLoS genetics · 2014Article
- Late replication domains in polytene and non-polytene cells of Drosophila melanogaster.PloS one · 2012Article
- Protein composition of interband regions in polytene and cell line chromosomes of Drosophila melanogaster.BMC genomics · 2011Article
- Identical functional organization of nonpolytene and polytene chromosomes in Drosophila melanogaster.PloS one · 2011Article
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Authors and funding
9 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In Drosophila polytene chromosomes, regions of intercalary heterochromatin are scattered throughout the euchromatic arms. Here, we present data on the first fine analysis of the individual intercalary heterochromatin region, 75C1-2, located in the 3L chromosome. By using electron microscopy, we demonstrated that this region appears as three closely adjacent condensed bands. Mapping of the region on the physical map by means of the chromosomal rearrangements with known breakpoints showed that the length of the region is about 445 kb. Although it seems that the SUUR protein binds to the whole 75C1-2 region, the proximal part of the region is fully polytenized, so the DNA underreplication zone is asymmetric and located in the distal half of the region. Finally, we speculate that intercalary heterochromatin regions of Drosophila polytene chromosomes are organized into three different types with respect to the localization of the underreplication zone.
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