在大米中增强基因组编辑活动与新奇的Chimeric ScCas9变体
Zhen Liang1, Yuqing Wu1, Shuke Deng1
1School of Life Science, Shanxi University, Taiyuan, Shanxi, 030006, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|January 5, 2025
概括
一种新的仿真SpcRN ++蛋白质提高了植物的基因组编辑效率,扩大了可向的DNA位点. 这种工程 Cas9 变种改进了基编辑,并创造了抗除草剂的米,展示了植物生物技术的有希望的蛋白质工程策略.
科学领域:
- 分子生物学分子生物学
- 植物生物技术 植物生物技术
- 基因编辑技术的技术
背景情况:
- 杆菌犬类Cas9蛋白 (ScCas9) 提供了比Streptococcus pyogenes Cas9 (SpCas9) 更广泛的原体空间体相邻动图 (PAM) 识别 (NNG).
- 现有的ScCas9及其变体Sc++在植物中的基因组编辑效率有限,特别是在NTG和NCG PAM站点.
研究的目的:
- 设计一种新奇的仿真Cas9变体,提高基因组编辑效率,在植物中更广泛的目标范围.
- 评估工程变体及其衍生品在基础编辑和生成作物特征方面的有效性.
主要方法:
- 通过将SpCas9识别 (REC) 域与Sc++变体相结合,设计了一个模拟的SpcRN++变体,结合了特定突变 (R221K/N394K) 和S. anginosus Cas9正电荷循环.
- 在大米原塑和稳定的转基因植物中评估基因组编辑能力和目标范围.
- 经过测试的基于nSpcRN++的腺素基编辑器 (A3A/Y130F和TadA8e) 用于细胞素和腺素编辑.
- 通过使用基于nSpcRN++的腺基编辑器准OsACC基因,生成抗除草剂的米.
主要成果:
- 与大米中的Sc++变异相比,SpcRN++变异显示出显著更高的基因组编辑能力和更广泛的目标范围.
- 基于nSpcRN++的基编辑器 (A3A/Y130F和TadA8e) 在植物中显示出增强的细胞因子和腺因编辑效率.
- 通过使用基于nSpcRN++的氨基基基编辑器成功生成了抗除草剂的水生殖质,以 OsACC 基因为目标.
结论:
- 工程 SpcRN ++ 变体是推动植物基因组编辑的强大工具.
- 这种蛋白质工程方法为开发改进的Cas9变种提供了一种多功能策略,用于各种植物应用.
- 抗除草剂水的发展凸显了SpicRN ++在作物改进中的实际实用性.
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