CasEMBLR: Cas9-Facilitated Multiloci Genomic Integration of in Vivo Assembled DNA Parts in Saccharomyces cerevisiae

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• 作者：Tadas Jako膷iu虆nas ; Arun S. Rajkumar ; Jie Zhang ; Dushica Arsovska ; Angelica Rodriguez ; Christian Bille Jendresen ; Mette L. Skj酶dt ; Alex T. Nielsen ; Irina Borodina ; Michael K. Jensen ; Jay D. Keasling
• 刊名：ACS Synthetic Biology
• 出版年：2015
• 出版时间：November 20, 2015
• 年：2015
• 卷：4
• 期：11
• 页码：1226-1234
• 全文大小：451K
• ISSN：2161-5063

文摘

Homologous recombination (HR) in Saccharomyces cerevisiae has been harnessed for both plasmid construction and chromosomal integration of foreign DNA. Still, native HR machinery is not efficient enough for complex and marker-free genome engineering required for modern metabolic engineering. Here, we present a method for marker-free multiloci integration of in vivo assembled DNA parts. By the use of CRISPR/Cas9-mediated one-step double-strand breaks at single, double and triple integration sites we report the successful in vivo assembly and chromosomal integration of DNA parts. We call our method CasEMBLR and validate its applicability for genome engineering and cell factory development in two ways: (i) introduction of the carotenoid pathway from 15 DNA parts into three targeted loci, and (ii) creation of a tyrosine production strain using ten parts into two loci, simultaneously knocking out two genes. This method complements and improves the current set of tools available for genome engineering in S. cerevisiae.