Engineered CRISPR/Cas9 system for multiplex genome engineering of polyploid industrial yeast strains
- Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States); Zhejiang Univ., Hangzhou (China)
- Univ. of Illinois at Urbana-Champaign, Urbana, IL (United States)
Abstract The CRISPR/Cas9 system has been widely used for multiplex genome engineering of Saccharomyces cerevisiae . However, its application in manipulating industrial yeast strains is less successful, probably due to the genome complexity and low copy numbers of gRNA expression plasmids. Here we developed an efficient CRISPR/Cas9 system for industrial yeast strain engineering by using our previously engineered plasmids with increased copy numbers. Four genes in both a diploid strain (Ethanol Red, 8 alleles in total) and a triploid strain (ATCC 4124, 12 alleles in total) were knocked out in a single step with 100% efficiency. This system was used to construct xylose‐fermenting, lactate‐producing industrial yeast strains, in which ALD6 , PHO13 , LEU2 , and URA3 were disrupted in a single step followed by the introduction of a xylose utilization pathway and a lactate biosynthetic pathway on auxotrophic marker plasmids. The optimized CRISPR/Cas9 system provides a powerful tool for the development of industrial yeast based microbial cell factories.
- Research Organization:
- Univ. of Illinois at Urbana-Champaign, IL (United States); Center for Advanced Bioenergy and Bioproducts Innovation (CABBI), Urbana, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Grant/Contract Number:
- SC0018420
- OSTI ID:
- 1436578
- Alternate ID(s):
- OSTI ID: 1424826
- Journal Information:
- Biotechnology and Bioengineering, Vol. 115, Issue 6; ISSN 0006-3592
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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