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在工厂开发TALE-adenine基编辑器

Dingbo Zhang¹, Jens Boch¹

¹Institute of Plant Genetics, Leibniz Universität Hannover, Hannover, Germany.

Plant biotechnology journal

|November 24, 2023

概括

类似转录激活器的效因子-腺基编辑器 (TALE-ABEs) 能够在植物中进行精确的A•T-to-G•C编辑. 这项研究证明了它们在米和尼科蒂安娜本塔米亚纳中的有效性,为改善作物铺平了道路.

科学领域:

分子生物学分子生物学
植物科学植物科学
基因组编辑基因组编辑

背景情况:

基准编辑器精确地修改DNA,没有双链断裂.
TALE-氨基基基编辑器 (TALE-ABEs) 便于A•T-to-G•C编辑,但它们在质体以外的植物应用和DDDA的作用尚不清楚.

研究的目的:

研究植物中的TALE-ABE编辑能力,特别是Nicotiana benthamiana和大米.
阐明细胞氨酸脱氨酶DddA在增强双链DNA上的腺氨酸脱氨酶活性中的功能作用.

主要方法:

具有各种脱氨酶融合架构的工程TALE-ABE在Nicotiana benthamiana和大米中进行了测试.
氨酸基编辑效率使用大米原生质中的*β-glucuronidase*记者系统进行了分析.
使用TALE-ABE.生成了具有质细胞基因组突变的再生大米植物.

主要成果:

氨酸脱氨酶DddA被证明可以增强单链DNA特异性脱氨酶 (TadA8e或APOBEC3A) 在双链DNA上的活性.
在大米原生质中实现了高产品纯度的精确腺编辑.
在质细胞基因组中成功地实现了米植物的向AT-to-GC突变的再生.

结论:

在植物核和器官基因组中,TALE-ABE是精确的A•T-to-G•C编辑的有效工具.
这项技术为改善作物和潜在的基因治疗应用提供了新的途径.

关键词:

氨酸脱氨酸酶的使用.类塑料是一种塑料.基因组编辑基因组编辑植物育种植物育种米米饭米饭米饭米饭.

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