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相关概念视频

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.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
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Cooperative Binding of Transcription Regulators02:13

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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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Single-Strand DNA Binding Proteins01:03

Single-Strand DNA Binding Proteins

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For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...
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Ligand Binding Sites02:40

Ligand Binding Sites

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Proteins are dynamic macromolecules that carry out a wide variety of essential processes; however, the activities of most proteins depend on their interactions with other molecules or ions, known as ligands.
Protein-ligand interactions are quite specific; even though numerous potential ligands surround a cellular protein at any given time, only a particular ligand can bind to that protein. Moreover, a ligand binds only to a dedicated area on the surface of the protein, known as the...
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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.
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相关实验视频

Updated: Jan 18, 2026

DNA Sequence Recognition by DNA Primase Using High-Throughput Primase Profiling
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对特定序列的DNA结合蛋白的计算设计.

Cameron J Glasscock1,2,3, Robert J Pecoraro4,5,6, Ryan McHugh4,5

  • 1Department of Biochemistry, University of Washington, Seattle, WA, USA. cjamesglasscock@gmail.com.

Nature structural & molecular biology
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概括
此摘要是机器生成的。

研究人员开发了一种计算方法来设计新的DNA结合蛋白 (DBPs). 这些工程 DBP 识别特定的 DNA 序列,并在细胞中起作用,用于基因调节和编辑应用.

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科学领域:

  • 分子生物学分子生物学
  • 生物技术是生物技术.
  • 计算生物学 计算生物学

背景情况:

  • 序列特定的DNA结合蛋白 (DBPs) 对于生物过程和生物技术应用至关重要.
  • 具有新奇特性的DBP工程对于像基因组编辑这样的高级应用是必不可少的.
  • 针对任意DNA目标的新型DBP的计算设计仍然是一个重大挑战.

研究的目的:

  • 开发和验证用于设计小,序列特定的DNA结合蛋白的计算方法.
  • 设计能够识别高亲和度和特异性的特定DNA目标序列的DBP.
  • 为了证明设计的DBP在细胞基因调节和编辑中的功能.

主要方法:

  • 利用计算方法来设计小型DBP,通过主要沟相互作用准特定的DNA序列.
  • 为五个不同的DNA标生成了DBP结合剂,实现了中纳米到高纳米的亲和力.
  • 采用射频扩散来实现更高阶的特异性,通过在DNA双螺旋上严格定位结合模块.

主要成果:

  • 设计的DBP在最多6个基对位置上表现出与计算模型匹配的特异性.
  • 设计的DBP-target复合体的晶体结构证实与设计模型的密切一致.
  • 工程 DBPs 成功抑制和激活转录在大肠杆菌和哺乳动物细胞.

结论:

  • 该计算方法使得能够设计出新的,序列特定的DNA结合蛋白.
  • 设计的DBP在细胞基因调节和编辑方面表现出高的特异性和功能性.
  • 这种方法为各种遗传应用提供了易于交付的DBP的途径.