在植物中使用TALE-cytosine deaminases进行有针对性的C•G-to-T•A基编辑
Dingbo Zhang1, Vanessa Pries1, Jens Boch2
1Leibniz University Hannover, Institute of Plant Genetics, Herrenhäuser Str. 2, Hannover, 30419, Germany.
BMC biology
|April 28, 2024
概括
转录激活器样效应因子衍生的细胞因子基编辑器 (TALE-DdCBEs) 被优化为植物细胞. 进化DddA变种显著提高了质体和核基因组的基因编辑效率,扩大了作物改进的工具.
科学领域:
- 分子生物学分子生物学
- 植物科学 植物科学
- 基因组工程是基因组工程.
背景情况:
- 基于TALE衍生的DDDA的细胞酶基编辑器 (TALE-DdCBEs) 能够在线粒体和叶绿体中进行C•G-to-T•A编辑.
- 这项技术利用转录激活器样效应器 (TALE) 阵列进行DNA结合,并将分裂的DDDA除氨酶用于编辑.
- 对植物细胞的优化以前缺乏.
研究的目的:
- 系统地调查TALE-DdCBE架构和工厂系统中的编辑规则.
- 优化TALE-DdCBEs以实现植物基因组中高效和有针对性的基因编辑.
- 扩大植物生物技术和作物改进的基础编辑工具箱.
主要方法:
- 建立了一个β-glucuronidase记者系统用于Nicotiana benthamiana的短暂测试.
- 测试了各种TALE-DdCBE架构,包括不同的间隔长度和进化的DddA变体 (DddA6,DddA11).
- 在模型植物 (N. benthamiana) 和作物物种 (大米) 中评估了编辑效率和特异性.
主要成果:
- TALE-DdCBEs在TALE绑定站点之间的特定间隔长度下有效地运行.
- 进化DddA变种 (DddA6,DddA11) 与正规的DddA相比,在N. benthamiana和大米中显著提高了编辑效率.
- DddA11在非TC目标编辑方面表现出更广泛的序列兼容性.
- 成功再生米与叶绿体C•G-to-T•A编辑和N. benthamiana与核C•G-to-T•A编辑.
- 确定了分裂DddA半部分的自发组装是植物中不必要编辑的来源.
结论:
- 改进了植物基因组中TALE-DdCBEs的准范围和参数.
- 证明了TALE-DdCBEs的成功应用,用于编辑植物中的质细胞和核基因组.
- 扩展了植物的基础编辑工具箱,为高保真性作物改进提供了精致的工具.
关键词:
基础编辑 基础编辑塑是一种塑.哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈脱氨酶是一种脱氨酶.基因组编辑 基因组编辑大米 大米 大米 大米 大米更多相关视频
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