A protocol for introduction of multiple genetic modifications in Saccharomyces cerevisiae using CRISPR/Cas9

A protocol for introduction of multiple genetic modifications in Saccharomyces cerevisiae using... Abstract Here, two methods are described for efficient genetic modification of Saccharomyces cerevisiae using CRISPR/Cas9. The first method enables the modification of a single genetic locus using in vivo assembly of a guide RNA (gRNA) expression plasmid without the need for prior cloning. A second method using in vitro assembled plasmids that could contain up to two gRNAs was used to simultaneously introduce up to six genetic modifications (e.g. six gene deletions) in a single transformation step by transforming up to three gRNA expression plasmids simultaneously. The method is not only suitable for gene deletion but is also applicable for in vivo site directed mutagenesis and integration of multiple DNA fragments in a single locus. In all cases, the strain transformed with the gRNA expression plasmids was equipped with a genomic integration of Spcas9, leading to strong and constitutive expression of SpCas9. The protocols detailed here have been streamlined to be executed by virtually any yeast molecular geneticist. CRISPR/Cas9, S. cerevisiae, gRNA, genetic modification, webtool, plasmid © FEMS 2018 This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited. For commercial re-use, please contact journals.permissions@oup.com http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png FEMS Yeast Research Oxford University Press

A protocol for introduction of multiple genetic modifications in Saccharomyces cerevisiae using CRISPR/Cas9

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Publisher
Oxford University Press
Copyright
© FEMS 2018
ISSN
1567-1356
eISSN
1567-1364
D.O.I.
10.1093/femsyr/foy063
Publisher site
See Article on Publisher Site

Abstract

Abstract Here, two methods are described for efficient genetic modification of Saccharomyces cerevisiae using CRISPR/Cas9. The first method enables the modification of a single genetic locus using in vivo assembly of a guide RNA (gRNA) expression plasmid without the need for prior cloning. A second method using in vitro assembled plasmids that could contain up to two gRNAs was used to simultaneously introduce up to six genetic modifications (e.g. six gene deletions) in a single transformation step by transforming up to three gRNA expression plasmids simultaneously. The method is not only suitable for gene deletion but is also applicable for in vivo site directed mutagenesis and integration of multiple DNA fragments in a single locus. In all cases, the strain transformed with the gRNA expression plasmids was equipped with a genomic integration of Spcas9, leading to strong and constitutive expression of SpCas9. The protocols detailed here have been streamlined to be executed by virtually any yeast molecular geneticist. CRISPR/Cas9, S. cerevisiae, gRNA, genetic modification, webtool, plasmid © FEMS 2018 This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs licence (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reproduction and distribution of the work, in any medium, provided the original work is not altered or transformed in any way, and that the work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

Journal

FEMS Yeast ResearchOxford University Press

Published: Jun 1, 2018

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