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Conservative Site-specific Recombination and Phase Variation

Conservative Site-specific Recombination and Phase Variation

Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...

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高吞吐量变体库和机器学习为回子基因编辑器产生设计规则.

Kate D Crawford^1,2, Asim G Khan¹, Santiago C Lopez^1,2

¹Gladstone Institute of Data Science and Biotechnology, 1650 Owens St, San Francisco, CA 94158, USA.

Nucleic acids research

|December 10, 2024

概括

研究人员优化了细菌逆转录酶系统,用于生物技术DNA生产. 他们确定了有效的DNA合成的关键RNA区域,改进了酵母和人类细胞中称为editrons的基因组编辑工具.

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科学领域:

分子生物学分子生物学
生物技术是生物技术.
合成生物学合成生物学

背景情况:

细菌逆逆转录酶系统用于细胞内单链DNA生产.
修改回子非编码RNA (ncRNA) 可以通过反转录实现定制DNA合成.
提高反转录效率对于回子技术至关重要,但缺乏系统的理解.

研究的目的:

系统地确定对Retron-Eco1ncRNA的修改,以保持或提高反转录效率.
建立用于CRISPR-Cas9基因组编辑的"编辑子"的设计规则.
在酵母和人体细胞中增强反子介导的DNA生产和编辑子效率.

主要方法:

高通量聚合变体库实验被用来测试成千上万的Retron-Eco1ncRNA修改.
测量DNA生成以确定ncRNA的耐受性和不耐受性区域.
使用Saccharomyces cerevisiae来定义编辑器设计规则,然后将其应用于人类基因组编辑.

主要成果:

分析了成千上万的Retron-Eco1ncRNA变体,揭示了DNA生产效率至关重要的特定区域.
编辑器的设计规则是使用酵母中的高通量库建立的.
优化后继子系统实现了迄今为止人类基因组编辑中Retron-Eco1编辑子的最高效率.

结论:

对逆子ncRNA修饰的系统分析为优化DNA生产提供了关键的见解.
定义的编辑器设计规则显著提高了CRISPR-Cas9介导的基因组编辑的效率.
这项工作推进了用于高效定制DNA合成和精确基因组工程应用的逆子技术.