在Streptococcus suis中的精确基因组工程基于宽主机范围向量和CRISPR-Cas9技术
Alex Gussak1, Maria Laura Ferrando1, Mels Schrama1
1Host-Microbe Interactomics, Animal Sciences, Wageningen University, 6708 WD Wageningen, The Netherlands.
ACS synthetic biology
|August 21, 2023
概括
一个基于CRISPR的新型Streptococcus suis基因组编辑系统加速了突变的构建,并简化了标记物的去除. 这种工具使得精确的基因修改和有效的基因删除在这个重要的动物传染病原体.
科学领域:
- 微生物学 微生物学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 瑞杆菌 (Streptococcus suis) 是一个重要的动物性传染病原体,在猪和人类中引起严重的入侵性疾病.
- 目前对S. suis的基因组工程方法效率低下,依赖于抗生素耐药性标记物,对小基因组突变缺乏精度.
研究的目的:
- 开发一种基于CRISPR的新型基因组编辑系统,用于S. suis.
- 为了实现快速,精确的基因修改,包括多个基因删除和核酸变化.
主要方法:
- 在S. suis.中利用线性DNA片段进行同源重组 (HR).
- 实施了基于等离子体的负选择系统,以消除未经编辑的细菌.
- 为CRISPR等离子体设计了一个宽主机范围的复制体,以提高应用性.
- 描述了一种Cas9-sgRNA逃脱机制,涉及缓慢生长的持久类殖民地.
主要成果:
- 在连续的编辑回合中,成功地演示了多个基因删除的快速引入.
- 在重要的基因中实现了精确的核酸变化.
- 鉴定了一种新的S. suis从CRISPR-Cas9向中逃脱机制,其特点是增长缓慢的殖民地不会妨碍编辑实用性.
- 开发的系统加速了突变的构建,并简化了抗生素标记物的去除.
结论:
- 开发的基于CRISPR的系统显著增强了S. suis.的基因工程工具箱.
- 与传统方法相比,这种方法可以实现更快,更精确的基因组编辑.
- 该系统的广泛宿主范围能力和高效的标记物去除可以简化对S. suis和其他潜在细菌的遗传研究.
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