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Title: Validating genome-wide CRISPR-Cas9 function improves screening in the oleaginous yeast Yarrowia lipolytica

Journal Article · · Metabolic Engineering
 [1];  [2];  [2];  [3];  [4];  [5];  [5];  [1];  [1];  [5];  [4];  [2];  [1]
  1. Univ. of California, Riverside, CA (United States)
  2. USDOE Joint Genome Institute (JGI), Walnut Creek, CA (United States)
  3. United States Military Academy, West Point, NY (United States)
  4. Univ. of Texas, Austin, TX (United States)
  5. Clemson Univ., Clemson, SC (United States)

Genome-wide mutational screens are central to understanding the genetic underpinnings of evolved and engineered phenotypes. The widespread adoption of CRISPR-Cas9 genome editing has enabled such screens in many organisms, but identifying functional sgRNAs still remains a challenge. Here, we developed a methodology to quantify the cutting efficiency of each sgRNA in a genome-scale library, and in doing so improve screens in the biotechnologically important yeast Yarrowia lipolytica. Screening in the presence and absence of native DNA repair enabled high-throughput quantification of sgRNA function leading to the identification of high efficiency sgRNAs that cover 94% of genes. Library validation enhanced the classification of essential genes by identifying inactive guides that create false negatives and mask the effects of successful disruptions. Quantification of guide effectiveness also creates a dataset from which determinants of CRISPR-Cas9 can be identified. Finally, application of the library identified novel mutations for metabolic engineering of high lipid accumulation.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF)
Grant/Contract Number:
AC02-05CH11231; CSP-503076; NSF 1706545; N00014-15-1-2785; NSF 1706134; NSF 1526742
OSTI ID:
1597716
Alternate ID(s):
OSTI ID: 1779369
Journal Information:
Metabolic Engineering, Vol. 55, Issue C; ISSN 1096-7176
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 47 works
Citation information provided by
Web of Science

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Cited By (6)

A set of Yarrowia lipolytica CRISPR/Cas9 vectors for exploiting wild-type strain diversity journal January 2020
Advances and opportunities in gene editing and gene regulation technology for Yarrowia lipolytica journal November 2019
Stress-tolerant non-conventional microbes enable next-generation chemical biosynthesis journal January 2020
Strategies for Developing CRISPR‐Based Gene Editing Methods in Bacteria journal November 2019
Enhanced scale and scope of genome engineering and regulation using CRISPR/Cas in Saccharomyces cerevisiae journal October 2019
Early-branching gut fungi possess a large, comprehensive array of biomass-degrading enzymes journal February 2016