在体内蛋白质-DNA相互作用的全基因组映射
David S Johnson1, Ali Mortazavi, Richard M Myers
1Department of Genetics, Stanford University School of Medicine, Stanford, CA, 94305-5120, USA.
Science (New York, N.Y.)
|June 2, 2007
概括
我们使用ChIP-Seq绘制了蛋白质-DNA相互作用图,确定了1946个神经元限制性沉默因子 (NRSF) 的结合部位. 这揭示了新的结合动机和潜在的基因标,推动了我们对基因调节的理解.
科学领域:
- 基因组学就是基因组学.
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 蛋白质-DNA相互作用形成基因调节网络.
- 绘制这些相互作用的地图对于理解基因表达至关重要.
- 神经元限制性沉默因子 (NRSF) 在基因调节中起着关键作用.
研究的目的:
- 开发一种大规模的染色体免疫沉试验 (ChIP-Seq),以全面地绘制体内蛋白质与DNA相互作用的地图.
- 在整个人类基因组中绘制NRSF的结合部位.
- 为了确定新的NRSF结合动机和候选基因标.
主要方法:
- 开发并应用了一种使用超高通量DNA测序的大规模染色体免疫沉试验 (ChIP-Seq).
- 在人体基因组中将NRSF与1946个位置的体内结合映射出来.
- 分析了用于分辨率,动机识别,敏感性,特异性和统计信心的约束性数据.
主要成果:
- 成功地绘制了人类基因组中的1946个NRSF结合位点,分辨率高 (+/-50 bp).
- 确定了正规和新的非正规NRSF绑定模式.
- ChIP-Seq数据显示出高灵敏度和特异性 (ROC区域>/=0.96) 与统计学可靠性 (P <10(-4)).
结论:
- ChIP-Seq是一个强大的工具,用于对蛋白质-DNA相互作用进行全面的全基因组映射.
- 已识别的NRSF结合部位和动机为基因调节网络提供了洞察力.
- 这项研究有助于推断新的候选相互作用,包括参与胰腺小岛细胞发育的候选相互作用.
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