Helmholtz Gemeinschaft

Search
Browse
Statistics
Feeds

High-resolution in situ hybridization analysis on the chromosomal interval 61C7-61C8 of Drosophila melanogaster reveals interbands as open chromatin domains

[img]
Preview
PDF (Accepted Manuscript (final draft)) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
4MB

Item Type:Article
Title:High-resolution in situ hybridization analysis on the chromosomal interval 61C7-61C8 of Drosophila melanogaster reveals interbands as open chromatin domains
Creators Name:Zielke, T. and Glotov, A. and Saumweber, H.
Abstract:Eukaryotic chromatin is organized in contiguous domains that differ in protein binding, histone modifications, transcriptional activity, and in their degree of compaction. Genome-wide comparisons suggest that, overall, the chromatin organization is similar in different cells within an organism. Here, we compare the structure and activity of the 61C7-61C8 interval in polytene and diploid cells of Drosophila. By in situ hybridization on polytene chromosomes combined with high-resolution microscopy, we mapped the boundaries of the 61C7-8 interband and of the 61C7 and C8 band regions, respectively. Our results demonstrate that the 61C7-8 interband is significantly larger than estimated previously. This interband extends over 20 kbp and is in the range of the flanking band domains. It contains several active genes and therefore can be considered as an open chromatin domain. Comparing the 61C7-8 structure of Drosophila S2 cells and polytene salivary gland cells by ChIP for chromatin protein binding and histone modifications, we observe a highly consistent domain structure for the proximal 13 kbp of the domain in both cell types. However, the distal 7 kbp of the open domain differs in protein binding and histone modification between both tissues. The domain contains four protein-coding genes in the proximal part and two noncoding transcripts in the distal part. The differential transcriptional activity of one of the noncoding transcripts correlates with the observed differences in the chromatin structure between both tissues. The significance of our findings for the organization and structure of open chromatin domains will be discussed.
Keywords:Histone Modifications, Insulators, Boundaries, Polytene Chromosomes, Animals, Drosophila Melanogaster
Source:Chromosoma
ISSN:0009-5915
Publisher:Springer (Germany)
Volume:125
Number:3
Page Range:423-435
Date:June 2016
Official Publication:https://doi.org/10.1007/s00412-015-0554-5
PubMed:View item in PubMed

Repository Staff Only: item control page

Downloads

Downloads per month over past year

Open Access
MDC Library