Interchromosomal association and gene regulation in trans.

Interchromosomal association and gene regulation in trans.
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反式染色体间关联和基因调控。

DOI:
10.1016/j.tig.2010.01.007
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发表时间:
2010
期刊:
Trends in genetics : TIG
影响因子:
--
通讯作者:
R. Flavell
R. Flavell
中科院分区:
--
文献类型:
--
作者:
Adam Williams;Charalampos G Spilianakis;R. Flavell

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细胞核是一个有序的三维实体,细胞核空间内基因组的组织可能对协调基因表达有影响。最近的技术发展表明,染色质折叠成环,使远端调控元件与它们调控的基因紧密接触。这种染色体内接触似乎是顺式增强子-启动子通讯的一般机制。诱人的证据正在出现,调节元件可能有能力肌动蛋白transto调节其他染色体上的基因。然而,明确的数据需要证明,染色体间的基因调控真正代表了另一个层次的控制在细胞核内是缺乏的,这一概念仍然是高度有争议的。这样的争论强调了我们目前对基因表达调控机制的理解还远未完成。
The nucleus is an ordered three-dimensional entity, and organization of the genome within the nuclear space might have implications for orchestrating gene expression. Recent technological developments have revealed that chromatin is folded into loops bringing distal regulatory elements into intimate contact with the genes that they regulate. Such intrachromosomal contacts appear to be a general mechanism of enhancer–promoter communicationin cis. Tantalizing evidence is emerging that regulatory elements might have the capacity to actin transto regulate genes on other chromosomes. However, unequivocal data required to prove that interchromosomal gene regulation truly represents another level of control within the nucleus is lacking, and this concept remains highly contentious. Such controversy emphasizes that our current understanding of the mechanisms that govern gene expression are far from complete.
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