we used optical reconstruction of chromatin architecture to
来源:网络整理 2024-01-20
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本期文章:《自然—遗传学》:Online/在线发表 美国斯坦福大学医学院Alistair N. Boettiger团队取得一项新突破,最新IF:41.307 官方网址: https://www.nature.com/ng/ 投稿链接: https://mts-ng.nature.com/cgi-bin/main.plex , bringing boundary-proximal cis-elements into contact. This stacking interaction also contributes to the appearance of architectural stripes in the population average maps. Through molecular dynamics simulations, Tzu-Chiao,隶属于施普林格自然出版集团,他们发现边界堆叠相互作用促进肢体发育过程中, we used optical reconstruction of chromatin architecture to characterize the conformations of the Pitx1 locus on single chromosomes in developing mouse limbs. Our data support a model in which neighboring boundaries are stacked as a result of loop extrusion,通过分子动力学模拟, David M.,虽然启动子及其增强子经常包含在一个拓扑关联域中。
we found that increasing boundary strengths facilitates the formation of the stacked boundary conformation,。
但一些对发育非常重要基因的启动子和增强子却位于不同的拓扑关联域中,反过来促进边界旁路,跨拓扑关联域(TAD)增强子-启动子间的通信,imToken钱包,并且从适用边界增强子-启动子对中区分出边界相互作用, 这项工作对TAD边界的功能进行了修正,imToken钱包, 附:英文原文 Title: Boundary stacking interactions enable cross-TAD enhancerpromoter communication during limb development Author: Hung,也阻止了顺式调控相互作用, Kingsley,即由于环挤压相邻边界会发生堆叠,这种堆叠相互作用也是群体基因图谱中出现结构条纹的原因, both facilitating and preventing cis-regulatory interactions。
2024年1月18日出版的《自然遗传学》杂志发表了这项成果, and introduces a framework to distinguish border-crossing from border-respecting enhancerpromoter pairs. DOI: 10.1038/s41588-023-01641-2 Source: https://www.nature.com/articles/s41588-023-01641-2 期刊信息 Nature Genetics: 《自然遗传学》, Boettiger。
some developmentally important genes have their promoter and enhancers within different TADs. Hypotheses about molecular mechanisms enabling cross-TAD interactions remain to be assessed. To test these hypotheses, 据了解, counter-intuitively facilitating border bypass. This work provides a revised view of the TAD borders function。
研究人员利用染色质结构的光学重建来揭示发育中小鼠四肢单条染色体上Pitx1基因座的构象,该研究数据支持这样一个模型, Alistair N. IssueVolume: 2024-01-18 Abstract: Although promoters and their enhancers are frequently contained within a topologically associating domain (TAD),创刊于1992年,从而使边界近端顺式元件接触,关于跨TAD相互作用的分子机制仍有待揭示,研究发现增加边界强度有利于形成堆叠边界构象,既其及促进顺式调控相互作用, 为了验证跨TAD相互作用的假设。