相关实验视频
Updated: Mar 10, 2026

10:15
Capturing Chromosome Conformation Across Length Scales
Published on: January 20, 2023
4.2K
scDIAGRAM:检测来自单个单细胞Hi-C矩阵的染色体组件,没有归算或参考特征
Yongli Peng1, Yujing Deng2, Menghan Liu2
1Beijing International Center for Mathematical Research (BICMR), Peking University, No.5 Yiheyuan Road, Haidian District, Beijing 100871, China.
Briefings in bioinformatics
|March 8, 2026
概括
我们开发了scDIAGRAM,这是一种新的方法,可以在单细胞Hi-C (scHi-C) 数据中准确识别A/B区. 这种方法增强了对单细胞水平3D基因组组织和基因调节的理解.
科学领域:
- 基因组学就是基因组学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 计算生物学 计算生物学
背景情况:
- 单细胞Hi-C (scHi-C) 数据揭示了3D基因组组织,但稀疏和杂.
- 准确检测A/B区块对于理解染色质结构和基因调节至关重要.
- 现有的方法面临scHi-C数据稀疏性和噪声的挑战.
研究的目的:
- 为了呈现scDIAGRAM,一个数据驱动的计算方法,用于在单个单元格中注释A/B区块.
- 克服现有方法在分析稀疏 scHi-C 数据方面的局限性.
- 为了能够在单细胞分辨率下对染色质部分进行可靠的分析.
主要方法:
- scDIAGRAM使用个人scHi-C矩阵的直接统计建模和图形社区检测.
- 该方法推断染色体的区间,没有归算或外部参考特征.
- 使用传统的基因组注释来分配A/B标签.
主要成果:
- 在模拟和真实scHi-C数据集上,scDIAGRAM展示了准确性和稳定性.
- 该方法成功地在人类细胞系中识别了A/B区.
- 对小鼠和人类数据集的应用揭示了与转录变异相关的隔间转移.
结论:
- scDIAGRAM提供了一个强大的框架,用于在单细胞分辨率下分析A/B区.
- 这种方法为在各种生物环境中染色体区的功能作用提供了新的见解.
- scDIAGRAM推进了对3D基因组组织及其对基因调节的影响的研究.
相关概念视频
Chromatin Immunoprecipitation- ChIP
12.7K
Chromatin immunoprecipitation, or ChIP, is an antibody-based technique used to identify sites on DNA that bind to transcription factors of interest or histone proteins. It also helps determine the type of histone modifications such as acetylation, phosphorylation, or methylation.
Types of ChIP
ChIP can be divided into two types - X-ChIP and N-ChIP. X-ChIP involves in vivo cross-linking of histones and regulatory proteins to DNA, fragmenting the DNA by sonication, and isolating the protein-DNA...
Types of ChIP
ChIP can be divided into two types - X-ChIP and N-ChIP. X-ChIP involves in vivo cross-linking of histones and regulatory proteins to DNA, fragmenting the DNA by sonication, and isolating the protein-DNA...
12.7K
Euchromatin
9.2K
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...
9.2K
Heterochromatin
18.9K
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...
18.9K

