Precise Editing at DNA Replication Forks Enables Multiplex Genome Engineering in Eukaryotes.

Precise Editing at DNA Replication Forks Enables Multiplex Genome Engineering in Eukaryotes.
复制标题

DNA复制叉处的精确编辑可以在真核生物中进行多重基因组工程。

DOI:
10.1016/j.cell.2017.10.034
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发表时间:
2017-11-30
期刊:
影响因子:
64.5
通讯作者:
Isaacs FJ
Isaacs FJ
中科院分区:
生物学1区
文献类型:
--
作者:
Barbieri EM;Muir P;Akhuetie-Oni BO;Yellman CM;Isaacs FJ

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We describe a multiplex genome engineering technology in Saccharomyces cerevisiae based on annealing of synthetic oligonucleotides at the lagging strand of DNA replication. The mechanism is independent of Rad51-directed homologous recombination and avoids the creation of double-strand DNA breaks, enabling precise chromosome modifications at single base-pair resolution with efficiencies >40% without unintended mutagenic changes at the targeted genetic loci. We observed the simultaneous incorporation of up to 12 oligonucleotides with as many as 60 targeted mutations in one transformation. Iterative transformations of a complex pool of oligonucleotides rapidly produced large combinatorial genomic diversity >105. This method was used to diversify a heterologous β-carotene biosynthetic pathway that produced genetic variants with precise mutations in promoters, genes, and terminators, leading to altered carotenoid levels. Our approach of engineering the conserved processes of DNA replication, repair, and recombination could be automated and establishes a general strategy for multiplex combinatorial genome engineering in eukaryotes. Replication forks can be co-opted to introduce multi-site mutations in eukaryotic genomes without the need for double strand breaks.
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