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相关概念视频

Intrinsically Disordered Proteins02:18

Intrinsically Disordered Proteins

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Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
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Intrinsically Disordered Proteins02:18

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Conservative Site-specific Recombination and Phase Variation02:53

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Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...
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Conserved Binding Sites01:49

Conserved Binding Sites

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Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
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Directing Proteins to the Rough Endoplasmic Reticulum01:34

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The organelle-specific signaling sequences direct proteins synthesized in the cytosol to their final destination like ER, mitochondria, peroxisomes, etc. Some of the proteins directed to ER are then trafficked via vesicles to other organelles within the cell or the extracellular environment through the Golgi complex. For example, the rough ER synthesizes soluble proteins for transportation to the lysosomes or secretion out of the cell. It can also synthesize transmembrane proteins that can...
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The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
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相关实验视频

Updated: Feb 19, 2026

Analyzing and Building Nucleic Acid Structures with 3DNA
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为了指导基因组导航,工程设计本质上是无序的区域.

Jing Liu1, Divya Krishna Kumar1, Bohdana Hurieva1

  • 1Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 76100, Israel.

Molecular cell
|February 17, 2026
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概括

内在无序区域 (IDRs) 将转录因子 (TFs) 引导到特定的DNA位点. 新的de novoIDR被设计并被证明可以直接调节基因组结合,揭示了序列编码识别的原理.

关键词:
这就是ChEC-seqq.基因调节 基因调节 基因调节本质上是无序的地区.合成生物学 合成生物学转录因子是一种转录因子.

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相关实验视频

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科学领域:

  • 分子生物学分子生物学
  • 基因组学就是基因组学.
  • 生物物理学的生物物理.

背景情况:

  • 内在无序区域 (IDR) 对许多蛋白质的功能至关重要,包括转录因子 (TF).
  • 在TF中IDRs调解特定基因组识别的机制仍然不完全理解.
  • 了解IDR序列决定因素是破译TF-基因组相互作用的关键.

研究的目的:

  • 定义规范内在无序区域 (IDR) 序列如何编码特定基因组识别的原则.
  • 调查水氨基酸分布在IDR中对指导转录因子结合的作用.
  • 设计能够选择性基因组向的新型IDR.

主要方法:

  • 185个新的内在无序区域 (IDR) 的设计和合成.
  • 疏水性氨基酸分散的系统变化和架属性的障碍.
  • 在芽酵母中进行全基因组结合分析,以评估合成IDR的目标特异性.

主要成果:

  • 新设计的IDRs缺乏与原生TFs的序列相似性,在指导基因组结合方面表现出活性.
  • 合成IDR的结合特异性可以通过改变疏水性传播和乱支架来调整.
  • 在数百种酵母促进体中观察到连续的序列导向结合偏好.

结论:

  • IDR序列可以编码特定的基因组识别原理,独立于对原生因子的序列同质性.
  • 水友性支架内的疏水性残留物的空间分布是IDR介导的结合特异性的关键决定因素.
  • 这些发现为理解和设计选择性DNA结合蛋白提供了基础.