克隆和功能验证的内源性U6促进器开发一个高效的CRISPR/Cas9介导的基因组编辑系统在kenaf (Hibiscus cannabinus L.) 的克隆和功能验证
Research square
|February 12, 2026
概括
研究人员确定并描述了kenaf U6促进子 (HcU6-14P),证明了其在驱动CRISPR/Cas9基因组编辑中卓越的效率,以增强kenaf功能基因组学.
科学领域:
- 植物分子生物学 植物分子生物学
- 基因组编辑技术的技术.
背景情况:
- 克里斯普尔/卡斯9系统依赖于由U6促进体转录的单导向RNA (sgRNA),用于精确的基因组编辑.
- 内源性U6促进体通常比外源性更高的转录效率,提高基因组编辑效率.
- 在kenaf (Hibiscus cannabinus L.) 中的内源性U6促进体以前没有被表征.
研究的目的:
- 在kenaf中识别和表征内源性U6促进体.
- 评估kenaf U6促进体的转录活性和基因组编辑效率.
- 建立一个功能基因组学研究的基础,在kenaf使用CRISPR/Cas9.
主要方法:
- 使用Arabidopsis U6 RNA序列对kenaf基因组进行同源搜索.
- 将候选促进子碎片 (HcU6-1,HcU6-14) 放大和克隆到一个GUS聚变向量中.
- 组织化学染色以评估促进体活性.
- 通过kenaf U6-14P或棉花U6-9P促进体驱动的HcALS sgRNA进行CRISPR/Cas9载体构造.
- 经过Agrobacterium rhizogenes的介导,对kenaf毛发根的转化.
- 对ALS基因片段进行测序分析,以提高编辑效率.
主要成果:
- 确定了两个U6促进体的候选基因,HcU6-1和HcU6-14.
- 这两种促进体都表现出转录活性,而HcU6-14表现出明显更强的活性.
- 由kenaf U6-14P促进体介导的CRISPR/Cas9成功地在kenaf毛发根中实现了有针对性的编辑.
- 使用棉花U6促进剂 (GbU6-9P) 观察到没有显著的编辑.
结论:
- 与棉花U6促进剂相比,kenaf U6-14P促进剂表现出优越的转录活性和基因组编辑效率.
- 这项研究提供了内源性kenaf U6促进体的第一个特征.
- 已识别的kenaf U6促进体是推动kenaf功能基因组学和作物改进的宝贵工具.
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