全基因组追踪来破译核组织的密码
Victoria Flores1, Irene Farabella2, Guy Nir1
1Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, TX, USA.
Current opinion in cell biology
|June 1, 2023
概括
新的成像技术提供了单细胞核组织的视图,揭示了3D基因组结构如何影响基因表达和细胞行为. 这种方法可以捕捉到以前传统方法无法捕捉到的复杂的核细节.
科学领域:
- 基因组学就是基因组学.
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
背景情况:
- 核组织,包括3D基因组结构,显著影响基因表达和细胞表型.
- 目前的理解严重依赖于组合测序,限制在单细胞水平上同时进行多模式分析.
- 现有的方法提供了宏观层面的洞察力,但缺乏复杂的核架构的单细胞分辨率.
研究的目的:
- 审查用于单细胞核分析的尖端成像技术的开发和应用.
- 突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出突出
- 探索这些技术如何加深对基因组结构-功能关系的理解.
主要方法:
- 专注于高分辨率成像技术的最新进展.
- 讨论允许同时检测多个核组件的技术.
- 在分析核组织时强调单细胞分辨率.
主要成果:
- 新兴的成像技术在单细胞水平上提供了前所未有的核的多元组件视图.
- 这些方法通过捕捉细胞异质性来克服集合研究的局限性.
- 对3D基因组组织及其功能影响的详细见解正在变得可用.
结论:
- 单细胞分辨率成像对于剖析核组织的复杂性和异质性至关重要.
- 技术进步正在改变我们研究基因组结构和功能的能力.
- 单细胞层面的多元组件视图是理解核动力学和细胞表型的关键.
相关概念视频
Karyotyping
61.9K
Overview
61.9K
Nuclear Protein Sorting
4.7K
Nuclear protein sorting is the selective trafficking of histones, polymerases, gene regulatory proteins into the nucleus and exporting RNAs and ribosomes to the cytosol. It is a tightly controlled process that regulates gene expression within a cell.
Proteins targeted to the nucleus carry nuclear localization signals or NLS recognized by import receptors in the cytosol. Similarly, proteins with nuclear export signals are recognized by export receptors. Import and export receptors are...
Proteins targeted to the nucleus carry nuclear localization signals or NLS recognized by import receptors in the cytosol. Similarly, proteins with nuclear export signals are recognized by export receptors. Import and export receptors are...
4.7K
Chromatin Packaging
15.5K
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...
15.5K
Nucleoid
48
The nucleoid represents a structurally and functionally distinct region within prokaryotic cells, where the cell's DNA and associated proteins are housed. Unlike eukaryotic cells, prokaryotes lack a membrane-bound nucleus, and the nucleoid facilitates the organization and accessibility of the genetic material within this constraint. The DNA in most bacteria and archaea exists as a single, circular, double-stranded molecule that is highly compacted through supercoiling and interactions with...
48
Chromatin Position Affects Gene Expression
23.4K
Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area.
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
23.4K
The Nucleosome
1.8K
Human DNA is almost two meters long. However, it is compressed inside a tiny nucleus measuring only a few microns in diameter. To make this degree of compaction possible, DNA is organized into several sequential levels so that it can fit into such a tiny space. The most compact form of DNA is a chromosome that can be seen under a microscope in a dividing cell.
In a chromosome, DNA is wound twice around a protein complex called a histone octamer core, which consists of 8 histone proteins. This...
In a chromosome, DNA is wound twice around a protein complex called a histone octamer core, which consists of 8 histone proteins. This...
1.8K


