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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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Efficient PAM-Less Base Editing for Zebrafish Modeling of Human Genetic Disease with zSpRY-ABE8e
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理性设计的TadA衍生的细胞因子编辑器可以实现文本独立的斑马鱼基因组编辑.

Wei Qin1, Sheng-Jia Lin1, Yu Zhang1

  • 1Genes & Human Disease Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, 73104, USA.

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新的CRISPR基编辑器 (zTadCBEs) 在斑马鱼中提供精确的C-to-T基因编辑. 这些先进的编辑器克服了旧工具的局限性,使得能够有效地创建疾病模型,以便更快地进行遗传研究.

关键词:
细胞酶基编辑器编辑器疾病模型 疾病模型基因组编辑 基因组编辑斑马鱼是一种斑马鱼.

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科学领域:

  • 遗传学 是一个遗传学.
  • 分子生物学分子生物学
  • 生物技术是生物技术.

背景情况:

  • 基因编辑器对于精确的基因组编辑至关重要.
  • 基于APOBEC的CBE面临限制,包括indels和受限的准,特别是CC和GC动机.
  • 从TadA衍生出的CBE提供了一个替代方案,但需要对效率和准范围进行优化.

研究的目的:

  • 在斑马鱼中评估和增强tRNA腺氨酸脱氨酶 (TadA) 衍生的细胞因子基编辑器 (CBEs).
  • 开发新的zTadCBE变体,以提高效率,减少目标外影响和扩大目标能力.
  • 使用zTadCBEs创建斑马鱼疾病模型,用于体内功能遗传评估.

主要方法:

  • 在斑马鱼中评估现有的TadA衍生CBEs.
  • 通过整合基于TadA的腺基编辑器 (ABE) 的有益突变来开发zTadCBE变异.
  • 整合了SpRYCas9n,以增强与原空间体相邻图案 (PAM) 的兼容性.
  • 在F0世代中生成四种斑马鱼疾病模型 (听觉,神经,代谢,肌肉).

主要成果:

  • 开发的zTadCBE变种在斑马鱼中显示出高C-to-T基编辑效率.
  • 与现有的CBE工具相比,观察到最小化的非目标突变.
  • 扩展的准窗口允许在与PAM相对更广泛的位置上编辑细胞蛋白.
  • 在F0世代中成功生成了四种不同的斑马鱼疾病模型,这些模型在以前的CBEs中很难产生.

结论:

  • zTadCBE变体代表了在斑马鱼中精确的C-to-T基础编辑的强大和多功能工具包.
  • 这些编辑器克服了基于APOBEC的CBE的局限性,提供了更高的效率和目标范围.
  • 开发的zTadCBEs能够快速地在体内对遗传变异和疾病建模进行功能评估.