Fast and efficient template-mediated synthesis of genetic variants

Fast and efficient template-mediated synthesis of genetic variants
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快速高效的模板介导的遗传变异合成

DOI:
10.1038/s41592-023-01868-1
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发表时间:
2023
期刊:
影响因子:
48
通讯作者:
Wang, Harris H.
Wang, Harris H.
中科院分区:
生物学1区
文献类型:
--
作者:
Liu, Liyuan;Huang, Yiming;Wang, Harris H.

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产生特定突变的有效方法使得能够研究自然群体中的功能变异,并导致遗传工程应用的进步。在这里,我们提出了一种新的方法,诱变模板引导扩增子组装(MEGAA),用于快速构建DNA酶大小的DNA变体。使用这种方法,可以以可预测的方式以每个靶超过90%的效率一次对DNA模板产生许多突变。我们为开源实验室自动化机器人设计了一个强大的迭代协议,该协议可以实现桌面生产和变体的长读序测序验证。使用该系统,我们证明了31个天然SARS-CoV 2刺突基因变体和10个重编码的大肠杆菌基因组片段的构建,每个4kb区域包含多达150个突变。此外,125个定义的组合腺相关病毒-2capgene变异体很容易使用该系统,表现出高达10倍的病毒包装增强相比,野生型。因此,MEGAA平台使得能够快速、廉价且以可扩展的方式生成多位点序列变体,以用于生物技术中的多种应用。
Efficient methods for the generation of specific mutations enable the study of functional variations in natural populations and lead to advances in genetic engineering applications. Here, we present a new approach, mutagenesis by template-guided amplicon assembly (MEGAA), for the rapid construction of kilobase-sized DNA variants. With this method, many mutations can be generated at a time to a DNA template at more than 90% efficiency per target in a predictable manner. We devised a robust and iterative protocol for an open-source laboratory automation robot that enables desktop production and long-read sequencing validation of variants. Using this system, we demonstrated the construction of 31 natural SARS-CoV2 spike gene variants and 10 recodedEscherichia coligenome fragments, with each 4 kb region containing up to 150 mutations. Furthermore, 125 defined combinatorial adeno-associated virus-2capgene variants were easily built using the system, which exhibited viral packaging enhancements of up to 10-fold compared with wild type. Thus, the MEGAA platform enables generation of multi-site sequence variants quickly, cheaply, and in a scalable manner for diverse applications in biotechnology.
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影响因子: 64.8
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