在梅达卡 (Oryzias latipes) 中使用编码子优化的SaCas9系统进行高效的基因组编辑
Yuewen Jiang1, Qihua Pan2, Zhi Wang1
1Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture and Rural Affairs, College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China.
Journal of Zhejiang University. Science. B
|January 1, 2025
概括
一个较小的金黄色葡萄球菌Cas9 (SaCas9) 基因编辑系统有效地修改了Medaka鱼的基因组. 这种编码子优化的SaCas9,结合tRNA-sgRNA,为鱼类基因编辑应用提供了更方便的工具.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 生物技术是生物技术.
背景情况:
- 集群定期间隔的短平行体重复 (CRISPR) /CRISPR相关蛋白9 (Cas9) 系统是一个强大的基因编辑工具.
- 大型的Streptococcus pyogenes Cas9 (SpCas9) 构成了向量传递的挑战.
- 需要更小,更高效的Cas9系统用于各种生物体的基因编辑,特别是鱼类模型.
研究的目的:
- 为了评估一个对子优化的金黄色葡萄球菌Cas9 (SaCas9) 系统在梅达卡鱼 (Oryzias latipes) 中基因编辑的有效性.
- 评估转移RNA (tRNA) -单导向RNA (sgRNA) 系统在医学中表达sgRNA的实用性.
- 为了确定SaCas9和tRNA-sgRNA是否可以结合在medaka中进行高效的基因编辑,准铁酶 (tyr),眼皮白化II (oca2) 和配对盒6.1 (pax6.1) 基因.
主要方法:
- 使用了经过编码子优化的金黄色葡萄球菌Cas9 (SaCas9) 基因,该基因比SpCas9.9小.
- 采用转移RNA (tRNA) -单导向RNA (sgRNA) 系统来转录sgRNA.
- 应用了SaCas9/sgRNA和SaCas9/tRNA-sgRNA系统来编辑medaka基因组中的特定基因.
- 构建并测试了一个全合一的表达盒 (CMV-SaCas9-tRNA-sgRNA-tRNA).
主要成果:
- SaCas9系统有效地编辑了medaka.aka.中的铁酶 (tyr) 基因.
- 两种SaCas9/sgRNA和SaCas9/tRNA-sgRNA系统都显示出高效的医学基因组编辑.
- 原体空间邻动图 (PAM) 序列 (5'-NNGRRT-3') 对于编辑效率至关重要.
- tRNA组件增强了系统灵活性,允许通过CMV等促进体通过sgRNA控制.
- 这款全集CMV-SaCas9-tRNA-sgRNA-tRNA录音带被证明是Medaka基因编辑的功能.
结论:
- 编码子优化的SaCas9系统是基因编辑的可行和较小的替代方案.
- SaCas9/tRNA-sgRNA系统为鱼类基因组工程提供了一种高效和灵活的方法.
- 这种方法对编辑其他鱼类基因组有潜在的应用,促进遗传研究和操纵.
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