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RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...
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优化的核糖蛋白复合体提高了斑马鱼的主要编辑效率.

Lang Qin1,2, Qiupeng Lin2,3

  • 1College of Fisheries, Southwest University, Chongqing 402460, China.

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概括

在斑马鱼中使用PE7和La-可访问的prime编辑指导RNA (pegRNAs) 增强了主要编辑 (PE) 技术. 这大大提高了基因组编辑的效率,使得精确的基因修改能够用于水生物种的研究和繁殖.

关键词:
水产养殖的水产养殖基因组编辑 基因组编辑总编辑 总编辑 总编辑斑马鱼是一种斑马鱼.

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科学领域:

  • 遗传学 遗传学 是一个
  • 分子生物学分子生物学
  • 水生基因组学 在水生基因组学.

背景情况:

  • 主编辑 (PE) 提供精确的基因组编辑,没有双链DNA断裂 (DSB).
  • 目前在斑马鱼中的PE应用显示效率有限,阻碍了其在这个模型生物体中的使用.
  • 提高PE效率对于推进斑马鱼的功能基因研究和遗传育种至关重要.

研究的目的:

  • 为了提高斑马鱼的主要编辑效率.
  • 为了评估PE7系统与La-可访问的原始编辑指导RNA (pegRNAs) 结合的有效性.
  • 为了证明增强PE在斑马鱼中产生特定突变的实用性.

主要方法:

  • 使用了PE7主要编辑系统和La-可访问的pegRNAs.
  • 通过与pegRNAs共同化PE7蛋白形成核糖蛋白 (RNP) 复合体.
  • 在斑马鱼胚胎中微注射RNP复合体,以实现目标基因组编辑.

主要成果:

  • 在目标位置达到高达15.99%的编辑效率,比PE2.2.增加6.81至11.46倍.
  • 在adgrf3b位点观察到16.60%的6bp插入和13.18%的10bp删除,比PE2.2增加3.13倍.
  • 成功生成了带有 tyr P302L 突变的斑马鱼,显示了降低的黑色素,证明了 PE 对特定特征修改的能力.

结论:

  • 在斑马鱼中,PE7显著提高了主要编辑效率.
  • 结合PE7和La可访问的pegRNAs,为鱼类精确的基因组编辑提供了一个强大的工具.
  • 这一进步促进了功能基因研究和水生物种的遗传育种.