染色活性:基于整合性表观基因组和功能特征测试,对不同类型的人类细胞的调控活性进行注释
Tevfik Umut Dincer1,2, Jason Ernst3,4,5,6,7,8,9
1Bioinformatics Interdepartmental Program, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
Genome biology
|May 9, 2025
概括
ChromActivity通过整合表观基因组数据来预测和注释全基因组的调节活动. 这种计算框架为各种细胞类型的人类调节基因组提供了洞察力.
科学领域:
- 基因组学就是基因组学.
- 计算生物学 计算生物学
- 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:
- 了解基因组调节对于破译细胞功能和疾病至关重要.
- 表观基因组图提供了对监管要素的洞察力,但需要复杂的整合来进行全面的分析.
研究的目的:
- 开发 ChromActivity,这是一个用于预测和注释全基因组监管活动的计算框架.
- 整合多个表观基因组图和功能特征数据集,以提高监管预测.
- 为分析和解释不同细胞类型的人类调控基因组提供资源.
主要方法:
- 开发了 ChromActivity,这是一个集各种表观基因组和功能数据集的计算框架.
- 为各种功能数据集和细胞类型生成全基因组监管活动预测.
- 根据预测模式制作了ChromScoreHMM基因组注释和ChromScore轨迹.
主要成果:
- ChromActivity成功地预测和注释了人类基因组中的调控活动.
- 该框架生成特定于细胞类型的监管预测和注释.
- 提供ChromScoreHMM和ChromScore轨道,用于详细分析监管要素.
结论:
- ChromActivity是研究基因组调节的一个有价值的计算资源.
- 能够对人类调控基因组进行全面的分析和解释.
- 促进对不同细胞类型的调节机制的理解.
相关概念视频
Chromatin Modification in iPS Cells
1.6K
Chromatin modification alters gene expression; therefore, scientists can add histone-modifying enzymes, histone variants, and chromatin remodeling complexes to somatic cells to aid reprogramming into pluripotent stem (iPS) cells.
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...
1.6K
Epigenetic Regulation
3.0K
Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
X-chromosome...
3.0K
Euchromatin
6.7K
The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions take up more dye, appearing darker, while the less-compact areas take up less dye and appear lighter. Based on the compaction level, chromatins are classified into two primary forms – euchromatin and heterochromatin.
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
6.7K
Heterochromatin
9.1K
The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions that take up more dye are called heterochromatin. Heterochromatin is further classified into two forms – constitutive heterochromatin and facultative heterochromatin.
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at...
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at...
9.1K
Spreading of Chromatin Modifications
8.1K
The histone proteins in the nucleosomes are post-translationally modified (PTM) to increase or decrease access to DNA. The commonly observed PTMs are methylation, acetylation, phosphorylation, and ubiquitination of lysine amino acids in the histone H3 tail region. These histone modifications have specific meaning for the cell. Hence, they are called "histone code". The protein complex involved in histone modification is termed as "reader-writer" complex.
Writers
The writer...
Writers
The writer...
8.1K
Position-effect Variegation
6.3K
In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
6.3K


