ChromPolymerDB:用于功能基因组学的单细胞3D染色体结构的高分辨率数据库
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.
Nucleic acids research
|November 18, 2025
概括
研究人员开发了一种新的计算框架,可以从大量数据中重建单细胞3D染色质结构. 这使得能够对不同类型的人类细胞的基因组架构和基因调节进行详细分析.
科学领域:
- 基因组学和生物信息学
- 分子和结构生物学 分子和结构生物学
- 计算生物学 计算生物学
背景情况:
- 三维 (3D) 染色体组织对于基因调节和基因组稳定性至关重要.
- 现有的人口平均测试 (例如,Hi-C) 掩盖了关键的单细胞结构异质性.
- 了解单细胞3D基因组架构对于破译基因表达调节至关重要.
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,公开可访问的数据库 (ChromPolymerDB) 的高分辨率单细胞染色体结构.
- 为探索3D基因组结构,基因表达和其他omics数据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学的建模方法.
- 应用了sBIF来解人口平均Hi-C数据,以重建单个3D染色质结构.
- 在 ChromPolymerDB 数据库中策划和组织重建结构,并提供交互式 Web 界面.
主要成果:
- 生成的ChromPolymerDB,包含大约1.08亿个重建的5kB分辨率的单细胞结构.
- 该数据库涵盖了50种人类细胞类型和实验条件的6万多个基因组位置.
- 该平台可实现交互式3D结构分析,多omics集成和比较基因组学.
结论:
- ChromPolymerDB为研究单细胞基因组结构及其功能影响提供了前所未有的资源.
- 该平台促进了对3D染色体构成,基因调控和细胞过程之间的联系的研究.
- 这项工作推进了比较3D基因组学,通过在各种生物环境中进行详细的结构分析.
相关概念视频
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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...
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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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