生物谷报道:虽然一个多细胞生物内的各种不同细胞类型包含同一套基因,但它们却具有很不相同的行为。这些细胞状态被认为与染色质状态有关,也就是说,与组蛋白和包
裹基因组的其他蛋白的修饰有关。现在,单分子测序技术被用来构建小鼠胚胎干细胞和其他两种在发育上更先进的细胞类型的染色质状态图,从而显示了重要染色质修饰在整个基因组范围内的分布。这项研究成果发表在最新一期的《自然》杂志上。
该研究为将综合染色质甄别方法应用于对各种不同的哺乳动物细胞群、包括癌症等疾病中所出现的异常细胞发育情况进行定性研究提供了一个框架。
FIGURE 1. Comparison of ChIP-Seq and ChIP-chip data.
Direct comparison of H3K4me3 (green) and H3K27me3 (red) ChIP data across a 300-kb region in mouse ES cells from independent experiments assayed by SMS (absolute fragment counts) or tiling arrays (log P-values for enrichment relative to whole-cell extracts15).
原文出处:
Nature Volume 448 Number 7153
Genome-wide maps of chromatin state in pluripotent and lineage-committed cells p553
Tarjei S. Mikkelsen, Manching Ku, David B. Jaffe, Biju Issac, Erez Lieberman, Georgia Giannoukos, Pablo Alvarez, William Brockman, Tae-Kyung Kim, Richard P. Koche, William Lee, Eric Mendenhall, Aisling O'Donovan, Aviva Presser, Carsten Russ, Xiaohui Xie, Alexander Meissner, Marius Wernig, Rudolf Jaenisch, Chad Nusbaum, Eric S. Lander & Bradley E. Bernstein
doi:10.1038/nature06008
Abstract | Full Text | PDF (577K) | Supplementary information
See also: Editor's summary | News and Views by Baylin & Schuebel
作者简介:
Bradley E. Bernstein, M.D. Ph.D.
Assistant Professor of Pathology
Massachusetts General Hospital, Harvard Medical School, Boston, MA USA