HiCrayon揭示了多态3D染色体组织的不同层次
Ben Nolan1, Hannah L Harris1, Achyuth Kalluchi1
1Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Emile St, Omaha, NE 68198, USA.
NAR genomics and bioinformatics
|December 20, 2024
概括
HiCrayon集成了3D染色质接触图与1D基因组数据,以实现更清晰的可视化. 这个工具有助于理解染色体组织,并揭示了新的隔间模式.
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:
- 染色体接触地图通常被视觉化为2D热图,其中1D基因组数据被单独对应.
- 这种传统方法需要读者手动对准特征,导致潜在的不准确性和解释3D染色体组织的清晰度降低.
研究的目的:
- 开发一个交互式工具,HiCrayon,以无集成3D染色体组织图与1D基因组数据集.
- 为了增强复杂的基因组数据的可视化,并促进染色体结构的分析.
主要方法:
- HiCrayon采用交互式可视化方法,基于1D基因组信号来彩色3D染色质接触图.
- 该工具是使用R Shiny和Python实现的,提供了一个用户友好的图形界面,可通过Web和容器化格式获得.
主要成果:
- HiCrayon有效地可视化了区间调用,ChIP-seq信号关系以及基因组循环中的差异 (例如,CTCF/cohesin与H3K27ac).
- 该工具展示了细胞分化过程中染色质组织变化的改进可视化.
- HiCrayon发现了以前未被分配的隔间模式,这表明了A和B隔间之外的一个独特的第三个染色体隔间.
结论:
- HiCrayon提供了一种可访问和强大的方法,用于整合和可视化多维基因组数据.
- 该工具增强了对3D染色体组织的解释,并有助于发现新的基因组特征和调控机制.
相关概念视频
02:38Heterochromatin
10.8K
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...
10.8K
02:05Duplication of Chromatin Structure
5.4K
The process of chromosome duplication during cell division requires genome-wide disruption and re-assembly of chromatin. The chromatin structure must be accurately inherited, reassembled, and maintained in the daughter cells to ensure lineage propagation.
The basic unit of the chromatin is the nucleosome, consisting of DNA wrapped around octameric histone proteins and short stretches of linker DNA separating individual nucleosomes. The histone proteins within the nucleosome have their...
The basic unit of the chromatin is the nucleosome, consisting of DNA wrapped around octameric histone proteins and short stretches of linker DNA separating individual nucleosomes. The histone proteins within the nucleosome have their...
5.4K
02:21Chromatin Packaging
15.1K
Each human somatic cell contains 6 billion base-pairs of DNA. Each base-pair is 0.34 nm long, which means that each diploid cell contains a staggering 2 meters of DNA. How is such a long DNA strand packed inside a nucleus measuring only 10 - 20 microns in diameter?
The chromatin
In combination with specialized DNA binding protein called Histones, the DNA double helix forms a compact DNA: protein complex called chromatin. The chromatin itself is further compacted into higher-order...
The chromatin
In combination with specialized DNA binding protein called Histones, the DNA double helix forms a compact DNA: protein complex called chromatin. The chromatin itself is further compacted into higher-order...
15.1K
03:17Inheritance of Chromatin Structures
6.2K
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
6.2K
01:01Euchromatin
6.8K
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...
6.8K
02:04Polytene Chromosomes
9.9K
Polytene chromosomes are giant interphase chromosomes with several DNA strands placed side by side. They were discovered in the year 1881 by Balbiani in salivary glands, intestine, muscles, malpighian tubules, and hypoderm of larvae Chironomus plumosus. Hence, these are also called "Salivary gland chromosomes." These are found in insects of the order Diptera and Collembola; in certain organs of mammals; and synergids, antipodes of flowering plants. Polytene chromosomes are also...
9.9K