DNA shape, genetic codes, and evolution.

DNA shape, genetic codes, and evolution.
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DOI:
10.1016/j.sbi.2011.03.002
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发表时间:
2011-06
影响因子:
6.8
通讯作者:
Tullius TD
Tullius TD
中科院分区:
生物学2区
文献类型:
--
作者:
Parker SC;Tullius TD

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虽然将核苷酸序列映射到蛋白质序列的三字母遗传密码是众所周知的,但一定存在嵌入人类基因组中的其他密码。最近的工作指出,DNA形状的序列依赖性变异是DNA中编码调控和其他信息的一种机制。最近的进展包括发现依赖于小沟宽度和静电的DNA的形状依赖性识别,在基因组的蛋白质编码区中存在重叠代码,以及促进核小体占据的核苷酸组成的补偿性变化的进化选择。越来越清楚的是,DNA的形状对生物功能很重要,因此将受到进化的限制。
While the three-letter genetic code that maps nucleotide sequence to protein sequence is well known, there must exist other codes that are embedded in the human genome. Recent work points to sequence-dependent variation in DNA shape as one mechanism by which regulatory and other information could be encoded in DNA. Recent advances include the discovery of shape-dependent recognition of DNA that depends on minor groove width and electrostatics, the existence of overlapping codes in protein-coding regions of the genome, and evolutionary selection for compensatory changes in nucleotide composition that facilitate nucleosome occupancy. It is becoming clear that DNA shape is important to biological function, and therefore will be subject to evolutionary constraint.
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