Systematic protein location mapping reveals five principal chromatin types in Drosophila cells.

Systematic protein location mapping reveals five principal chromatin types in Drosophila cells.
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DOI:
10.1016/j.cell.2010.09.009
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发表时间:
2010-10-15
期刊:
影响因子:
64.5
通讯作者:
van Steensel B
van Steensel B
中科院分区:
生物学1区
文献类型:
--
作者:
Filion GJ;van Bemmel JG;Braunschweig U;Talhout W;Kind J;Ward LD;Brugman W;de Castro IJ;Kerkhoven RM;Bussemaker HJ;van Steensel B

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染色质对于调节转录和其他功能很重要,但是染色质组成的多样性和沿染色体的分布仍然很差。通过对果蝇细胞中53个广泛选择染色质成分的全基因组结合图的整合分析,我们表明该基因组被分割为5种主要的染色质类型,这些染色质类型是由蛋白质的独特但重叠组合定义的,并形成可以扩展的域,这些结合可以扩展到范围内。 > 100 kb。我们确定覆盖基因组一半的抑制性染色质类型,缺乏经典的异染色质标记。此外,转录活性的白染料包括两种在分子组织和H3K36甲基化方面不同的类型,并调节不同的基因类别。最后,我们提供的证据表明,不同的染色质类型有助于将DNA结合因子靶向特定的基因组区域。这些结果为后生细胞中染色质多样性和域组织提供了全球视图。
Chromatin is important for the regulation of transcription and other functions, yet the diversity of chromatin composition and the distribution along chromosomes is still poorly characterized. By integrative analysis of genome-wide binding maps of 53 broadly selected chromatin components in Drosophila cells, we show that the genome is segmented into five principal chromatin types that are defined by unique, yet overlapping combinations of proteins, and form domains that can extend over >100 kb. We identify a repressive chromatin type that covers about half of the genome and lacks classic heterochromatin markers. Furthermore, transcriptionally active euchromatin consists of two types that differ in molecular organization and H3K36 methylation, and regulate distinct classes of genes. Finally, we provide evidence that the different chromatin types help to target DNA-binding factors to specific genomic regions. These results provide a global view of chromatin diversity and domain organization in a metazoan cell.
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