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Nucleic Acids Res. 2013 Apr;41(7):4336-43. doi: 10.1093/nar/gkt135. Epub 2013 Mar 4.

Genome engineering in Saccharomyces cerevisiae using CRISPR-Cas systems.

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  • 1Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA.

Abstract

Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR) and CRISPR-associated (Cas) systems in bacteria and archaea use RNA-guided nuclease activity to provide adaptive immunity against invading foreign nucleic acids. Here, we report the use of type II bacterial CRISPR-Cas system in Saccharomyces cerevisiae for genome engineering. The CRISPR-Cas components, Cas9 gene and a designer genome targeting CRISPR guide RNA (gRNA), show robust and specific RNA-guided endonuclease activity at targeted endogenous genomic loci in yeast. Using constitutive Cas9 expression and a transient gRNA cassette, we show that targeted double-strand breaks can increase homologous recombination rates of single- and double-stranded oligonucleotide donors by 5-fold and 130-fold, respectively. In addition, co-transformation of a gRNA plasmid and a donor DNA in cells constitutively expressing Cas9 resulted in near 100% donor DNA recombination frequency. Our approach provides foundations for a simple and powerful genome engineering tool for site-specific mutagenesis and allelic replacement in yeast.

PMID:
23460208
[PubMed - indexed for MEDLINE]
PMCID:
PMC3627607
Free PMC Article

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