Bulky Histone Modifications May Have an Oversized Role in Nucleosome Dynamics.

Bulky Histone Modifications May Have an Oversized Role in Nucleosome Dynamics.
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DOI:
10.1002/bies.201900217
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发表时间:
2020-01
期刊:
BioEssays : news and reviews in molecular, cellular and developmental biology
影响因子:
--
通讯作者:
McKnight J
McKnight J
中科院分区:
其他
文献类型:
--
作者:
Orlandi K;McKnight J

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Inside the nucleus of eukaryotic cells, the genetic information required to run all processes of life is wrapped around histone proteins into nucleosomes. To orchestrate the selection of specific genetic information and to facilitate DNA-dependent transactions occurring in the context of nucleosomes, accessibility of DNA must be spatiotemporally altered. In this issue, Krajewski proposes an intriguing hypothesis for how chemical attachment of large, bulky histone modifications can have oversized influence on chromatin dynamics.[1]How is a change in genome accessibility and functionality achieved through chemistry? Specific combinations of histone modifications recruit effector proteins, and small histone modifications (acetylation, methylation) can alter nucleosome charge and/or subtly affect nucleosome dynamics. Here, Krajewski argues that when the chemical modification approaches the size of a histone, such as ubiquitylation and SUMOylation, gross structural distortions and large-scale changes in nucleosome dynamics occur. Thus classical descriptions of the effects of histone modification may underestimate the consequences of these bulky histone marks.
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