The Sounds of Silence – Histone Deacetylation Meets hisTone Methylation

The Sounds of Silence – Histone Deacetylation Meets hisTone Methylation
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沉默之声——组蛋白脱乙酰化遇上组蛋白甲基化

DOI:
10.1023/a:1022927725945
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发表时间:
2003
期刊:
影响因子:
1.5
通讯作者:
A. Imhof
A. Imhof
中科院分区:
生物学4区
文献类型:
--
作者:
B. Czermin;A. Imhof

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基因活性的抑制和抑制状态的维持是细胞分化、有序胚胎发育和组织完整性的基本要求。此外,基因组的大区域如着丝粒和端粒具有结构功能,并且必须保持转录失活才能发挥功能。在这两种情况下,转录沉默是通过将相应的DNA密集包装成异染色质或异染色质样结构来实现的。在这篇小综述中,我们总结了最近的研究结果,这指向一个主要功能的翻译后组蛋白修饰的过程中建立和维护凝聚异染色质。两种酶活性,组蛋白甲基化和组蛋白去乙酰化,被认为参与转录沉默的物理关联,提供了异染色质在细胞分裂和分化过程中如何启动和维持的分子模型的框架。
The repression of gene activity and the maintenance of the repressed state are fundamental requirements of cell differentiation, ordered embryonic development and tissue integrity. Furthermore, large regions of the genome such as centromeres and telomeres have a structural function and have to be kept transcriptionally inactive to be functional. In both cases the transcriptional silencing is accomplished through a dense packaging of the corresponding DNA into heterochromatin or heterochromatin-like structures. In this minireview we summarise recent findings, which point towards a major function of posttranslational histone modifications in the process of establishment and maintenance of condensed heterochromatin. The physical association of two enzymatic activities, histone methylation and histone deacetylation, which are thought to be involved in transcriptional silencing, provide the framework of a molecular model of how heterochromatin is initiated and maintained during cell division and differentiation.
DOI: --
发表时间: 1989-10
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