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优化体外转录的CRISPR-Cas9单向导RNA库,以提高统一性和可负担性
Natanya K Villegas1,2,3, Yukiko R Gaudreault1, Abigail Keller1
1Department of Bioengineering, Phil and Penny Knight Campus for Accelerating Scientific Impact, University of Oregon, 1505 Franklin Blvd., Eugene, OR 97403, USA.
bioRxiv : the preprint server for biology
|April 8, 2025
概括
我们开发了一种具有成本效益的方法来合成单导向RNA (sgRNA) 库,大大降低了成本并改善了表示偏差. 这项工作提高了CRISPR-Cas9查效率,并指导RNA设计.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 生物技术是生物技术.
背景情况:
- 克里斯普尔-Cas9技术依赖于单导向RNA (sgRNA) 来进行向基因编辑.
- 目前的sgRNA合成方法可能是昂贵的,并遭受表现偏差.
- 优化sgRNA库的生产对于推进基于CRISPR的应用程序至关重要.
研究的目的:
- 开发一个可扩展和具有成本效益的sgRNA合成工作流程.
- 在合成过程中识别和减轻sgRNA间隔器表示中的偏差.
- 为了提高sgRNA图书馆的统一性和可负担性,用于CRISPR屏幕.
主要方法:
- 用于sgRNA间隔器的微阵列衍生小组的大型池.
- 雇佣了金门组件用于dSDNA模板的构建.
- 使用T7RNA聚合酶进行了*体外*转录.
- 分析了使用RNA-seq. 的间隔器表示偏差.
- 测试了关氨酸四聚合物添加,乳液细分和反应优化以减少偏差.
主要成果:
- 在sgRNA合成中实现了70%以上的成本降低.
- 确定了T7促进体附近的富含关氨酸的序列是偏差的主要来源.
- 瓜四聚合物添加减少了19%的偏差,但增加了高分子量RNA.
- 乳液分离和反应优化也减少了偏差.
- 在大规模sgRNA库中证明了更好的统一性.
结论:
- 开发的工作流显著提高了sgRNA库生产的可负担性和可扩展性.
- 缓解间隔符表示偏差的策略是有效的,对指导RNA设计有影响.
- 这些进展将有利于CRISPR-Cas9屏幕和其他核酶系统.
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