新型測序技術實現對單分子調控結構的捕獲
作者:
小柯機器人發布時間:2020/6/27 17:21:13
美國哈佛醫學院John A. Stamatoyannopoulos、Andrew B. Stergachis等研究人員合作開發了染色質纖維測序技術,可實現對單分子調控結構的捕獲。2020年6月26日,《科學》發表了這一成果。
研究人員開發了一種使用非特異性DNA N6-腺嘌呤甲基轉移酶將單個染色質纖維的結構精確印刷到其複合DNA模板上的方法。染色質模板的單分子長讀測序能夠實現對數千鹼基長度染色質纖維的主要結構進行單核苷酸解析度的讀取(Fiber-seq)。
Fiber-seq在單個染色質纖維的線性組織中暴露出廣泛的可塑性,並闡明了指導DNA調控、鄰近調控元件的協同調控、單分子核小體定位以及單分子轉錄因子佔位的原理。這些方法和結果為基因調控的主要架構開闢了新的道路。
據了解,基因調控主要是在單個線性染色質分子水平上確定的,但是人們目前對順式調控結構的了解來自對大量不同分子的零碎採樣。
附:英文原文
Title: Single-molecule regulatory architectures captured by chromatin fiber sequencing
Author: Andrew B. Stergachis, Brian M. Debo, Eric Haugen, L. Stirling Churchman, John A. Stamatoyannopoulos
Issue&Volume: 2020/06/26
Abstract: Gene regulation is chiefly determined at the level of individual linear chromatin molecules, yet our current understanding of cis-regulatory architectures derives from fragmented sampling of large numbers of disparate molecules. We developed an approach for precisely stenciling the structure of individual chromatin fibers onto their composite DNA templates using nonspecific DNA N6-adenine methyltransferases. Single-molecule long-read sequencing of chromatin stencils enabled nucleotide-resolution readout of the primary architecture of multikilobase chromatin fibers (Fiber-seq). Fiber-seq exposed widespread plasticity in the linear organization of individual chromatin fibers and illuminated principles guiding regulatory DNA actuation, the coordinated actuation of neighboring regulatory elements, single-molecule nucleosome positioning, and single-molecule transcription factor occupancy. Our approach and results open new vistas on the primary architecture of gene regulation.
DOI: 10.1126/science.aaz1646
Source: https://science.sciencemag.org/content/368/6498/1449
Science:《科學》,創刊於1880年。隸屬於美國科學促進會,最新IF:41.037