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Protein Networks02:26

Protein Networks

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An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
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Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome.  Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form...
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调节性DNA的单细胞映射:蛋白相互作用

Wei-Yu Chi1,2,3,4, Sang-Ho Yoon1,2,3, Levan Mekerishvili1,2,3,4

  • 1Division of Hematology and Medical Oncology, Department of Medicine and Meyer Cancer Center, Weill Cornell Medicine, New York, NY, USA.

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概括

我们开发了D&D-seq,这是一种新的单细胞技术,用于绘制转录因子结合DNA的位置. 这种方法揭示了DNA:蛋白相互作用如何在衰老,疾病和癌症中发生变化.

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科学领域:

  • 表观遗传学和基因组学
  • 分子生物学分子生物学
  • 单细胞分析 单细胞分析

背景情况:

  • 基因表达受到转录因子 (TF) 和表观遗传信号的调节.
  • 这些网络中断与衰老,疾病和癌症有关.
  • 现有的方法限制了单细胞中DNA:蛋白相互作用的分析,阻碍了对调节网络的理解.

研究的目的:

  • 开发一种新的单细胞技术,用于绘制DNA:蛋白相互作用的地图.
  • 克服现有方法的局限性,以分析单细胞中转录因子结合的情况.
  • 为了使基因调节在健康和疾病环境中的多式分析.

主要方法:

  • 开发了对接和除菌,随后进行了测序 (D&D-seq),这是一个单细胞免疫结合DNA:蛋白质映射技术.
  • 结合抗体结合纳米体与细胞因子基编辑器,以描述TF结合.
  • 将D&D-seq集成到单单细胞多组工作流程中.

主要成果:

  • 在批量和单细胞中,D&D-seq精确地分析了转录因子结合 (CTCF,GATA),具有高特异性和高效率.
  • 该技术显示了最小的目标外活动和与批量ChIP-seq.高一致性.
  • 应用于人类初级细胞,D&D-seq确定了CTCF结合部位,预测了3D染色体结构,并揭示了IDH2突变细胞中CTCF结合的改变.

结论:

  • D&D-seq是一种用于直接映射TF和染色体重塑剂与DNA结合的转化技术,用于初级人类样本中的DNA.
  • 这一进步为研究健康和疾病中的染色质和转录调节开辟了新的途径.
  • 能够更深入地了解在病理上下文中的监管网络干扰.