在转录因子足迹中编码的广泛的人类调节词汇
Shane Neph1, Jeff Vierstra, Andrew B Stergachis
1Department of Genome Sciences, University of Washington, Seattle, Washington 98195, USA.
Nature
|September 8, 2012
概括
这项研究揭示了人类基因组中庞大的,保存的调节代码,揭示了数百万个转录因子结合位. 这些DNA足迹显著扩大了我们对基因调节及其进化印记的理解.
科学领域:
- 基因组学就是基因组学.
- 分子生物学分子生物学
- 生物信息学是一种生物信息学.
背景情况:
- 与DNA结合的调节因子产生了被称为足迹的受保护区域.
- 了解这些足迹对于破译基因调节至关重要.
研究的目的:
- 在不同类型的人类细胞中绘制转录因子占用率的地图.
- 描述监管词汇及其进化保护.
- 确定新的监管动机及其功能意义.
主要方法:
- 基因组DNase I在41种细胞和组织类型中的足迹.
- 对转录因子占用率和序列元素的分析.
- 与进化保护和蛋白质-DNA接口数据的比较.
主要成果:
- 检测到4500万个转录因子占用事件,识别了840万个不同的序列元素.
- 扩大了人类的cis-regulatory词典,其大小几乎翻了一番.
- 发现了与调控足迹相关的遗传变异和DNA甲基化模式.
- 识别了保存的监管动机和定义转录开始地点的特定足迹.
结论:
- 人类基因组包含一个由转录因子结构打印的广,保存的调节代码.
- 监管足迹是理解基因调节,进化和疾病的关键.
- 新的图案和细胞选择性占用模式提供了对发展和分化的洞察力.
相关概念视频
Transcription Factors
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
Transcription Factors
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
Cis-regulatory Sequences
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
Master Transcription Regulators
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
Cis-regulatory Sequences
Cis-regulatory sequences are short fragments of non-coding DNA that are present on the same chromosomes as the genes that they regulate. These fragments serve as binding sites for transcriptional regulators, proteins that are responsible for controlling gene transcription and differential gene expression across cell types in eukaryotes. Cis-regulatory sequences can be close to the gene of interest or thousands of bases away in the DNA sequence; however, those sequences that are further away are...
Master Transcription Regulators
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...


