ChromPolymerDB:一个高分辨率的单细胞3D染色体结构的功能基因组学的数据库
Min Chen1, Lin Du2, Siyuan Zhao3
1State Key Laboratory of Systems Medicine for Cancer and Bio-ID Center, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
bioRxiv : the preprint server for biology
|November 19, 2025
概括
研究人员开发了一种新的计算框架,即序列贝叶斯推理框架 (sBIF),用于从批量Hi-C数据中重建单细胞3D染色质结构. 这使得基因组架构和基因调控在多种细胞类型中的细节分析成为可能.
科学领域:
- 基因组学就是基因组学.
- 计算生物学 计算生物学
- 结构生物学 结构生物学
背景情况:
- 三维染色体组织对于基因调节和基因组稳定性至关重要.
- 像Hi-C这样的人口平均测定模糊了关键的单细胞结构异质性.
- 了解单细胞基因组结构对于破译基因调节至关重要.
研究的目的:
- 开发一个计算框架,将大量的Hi-C数据解成单细胞3D染色体构造.
- 创建一个全面的,高分辨率的单细胞染色体结构数据库.
- 为探索3D基因组结构和生物过程之间的关系提供工具.
主要方法:
- 开发了序列贝叶斯推理框架 (sBIF),一种基于聚合物物理的建模方法.
- 应用sBIF来解人口平均Hi-C数据以重建单细胞染色质结构.
- 创建了ChromPolymerDB,这是一个公开可访问的数据库,存储约10^8重建的5kB分辨率单细胞结构.
主要成果:
- 在5kB分辨率下成功重建了~10^8个单细胞3D染色体构造.
- ChromPolymerDB涵盖了50种人类细胞类型和条件的6万多个基因组位点.
- 该数据库为3D结构分析和多omics集成提供了一个交互式平台.
结论:
- ChromPolymerDB为研究单细胞水平的基因组架构和基因调节提供了一个独特的资源.
- 该平台促进了对不同细胞类型,发育阶段和疾病背景的染色质结构的比较分析.
- 这项工作推进了比较3D基因组学领域,为基因组组织提供了前所未有的见解.
相关概念视频
02:38Heterochromatin
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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...
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02:21Chromatin Packaging
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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
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01:32Chromatin Packaging
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Each human somatic cell contains 6 billion base pairs of DNA. Each base pair is 0.34 nm long, meaning each diploid cell contains a staggering 2 meters of DNA. This long DNA strand is packed inside a nucleus measuring only 10-20 microns in diameter with the help of specialized DNA-binding proteins called histones. Together they form a compact DNA-protein complex called chromatin. The chromatin is further compacted into higher-order structures. The highest level of compaction is achieved during...
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