skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: CRISPR-mediated multigene integration enables Shikimate pathway refactoring for enhanced 2-phenylethanol biosynthesis in Kluyveromyces marxianus

Journal Article · · Biotechnology for Biofuels
 [1];  [1];  [1];  [1];  [1];  [2]; ORCiD logo [3]
  1. Univ. of California, Riverside, CA (United States). Dept. of Chemical and Environmental Engineering
  2. Univ. of California, Riverside, CA (United States). Dept. of Chemical and Biomolecular Engineering
  3. Univ. of California, Riverside, CA (United States). Dept. of Chemical and Environmental Engineering; Univ. of California, Riverside, CA (United States). Center for Industrial Biotechnology

Background: 2-phenylethanol (2-PE) is a rose-scented flavor and fragrance compound that is used in food, beverages, and personal care products. Compatibility with gasoline also makes it a potential biofuel or fuel additive. A biochemical process converting glucose or other fermentable sugars to 2-PE can potentially provide a more sustainable and economical production route than current methods that use chemical synthesis and/or isolation from plant material. Results: We work toward this goal by engineering the Shikimate and Ehrlich pathways in the stress-tolerant yeast Kluyveromyces marxianus. First, we develop a multigene integration tool that uses CRISPR-Cas9 induced breaks on the genome as a selection for the one-step integration of an insert that encodes one, two, or three gene expression cassettes. Integration of a 5-kbp insert containing three overexpression cassettes successfully occurs with an efficiency of 51 ± 9% at the ABZ1 locus and was used to create a library of K. marxianus CBS 6556 strains with refactored Shikimate pathway genes. The 33-factorial library includes all combinations of KmARO4, KmARO7, and KmPHA2, each driven by three different promoters that span a wide expression range. Analysis of the refactored pathway library reveals that high expression of the tyrosine-deregulated KmARO4K221L and native KmPHA2, with the medium expression of feedback insensitive KmARO7G141S, results in the highest increase in 2-PE biosynthesis, producing 684 ± 73 mg/L. Ehrlich pathway engineering by overexpression of KmARO10 and disruption of KmEAT1 further increases 2-PE production to 766 ± 6 mg/L. The best strain achieves 1943 ± 63 mg/L 2-PE after 120 h fed-batch operation in shake flask cultures. Conclusions: The CRISPR-mediated multigene integration system expands the genome-editing toolset for K. marxianus, a promising multi-stress tolerant host for the biosynthesis of 2-PE and other aromatic compounds derived from the Shikimate pathway.

Research Organization:
Univ. of California, Riverside, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF)
Grant/Contract Number:
SC0019093; NSF 1803630; NSF 180367
OSTI ID:
1816782
Journal Information:
Biotechnology for Biofuels, Vol. 14, Issue 1; ISSN 1754-6834
Publisher:
BioMed CentralCopyright Statement
Country of Publication:
United States
Language:
English

References (52)

Functional characterization of rose phenylacetaldehyde reductase (PAR), an enzyme involved in the biosynthesis of the scent compound 2-phenylethanol journal January 2011
High throughput, colorimetric screening of microbial ester biosynthesis reveals high ethyl acetate production from Kluyveromyces marxianus on C5, C6, and C12 carbon sources journal September 2016
Sequential gene integration for the engineering of Kluyveromyces marxianus journal January 2007
Putting bugs to the blush: Metabolic engineering for phenylpropanoid-derived products in microorganisms journal November 2013
Production of 2-Phenylethyl Alcohol by Kluyveromyces marxianus journal April 1998
Development of a comprehensive set of tools for genome engineering in a cold- and thermo-tolerant Kluyveromyces marxianus yeast strain journal August 2017
Evolution of feedback-inhibited  /  barrel isoenzymes by gene duplication and a single mutation journal January 2003
Genetic basis of the highly efficient yeast Kluyveromyces marxianus: complete genome sequence and transcriptome analyses journal March 2015
Genome-wide landscape of position effects on heterogeneous gene expression in Saccharomyces cerevisiae journal July 2017
Effect of oxygenation and temperature on glucose-xylose fermentation in Kluyveromyces marxianus CBS712 strain journal January 2014
Metabolic Engineering of Escherichia coli for Production of 2-Phenylethanol and 2-Phenylethyl Acetate from Glucose journal May 2018
Synthesis of polyketides from low cost substrates by the thermotolerant yeast Kluyveromyces marxianus journal April 2019
Standardized Markerless Gene Integration for Pathway Engineering in Yarrowia lipolytica journal November 2016
High-temperature fermentation: how can processes for ethanol production at high temperatures become superior to the traditional process using mesophilic yeast? journal October 2009
Metabolic Engineering of Saccharomyces cerevisiae for Rosmarinic Acid Production journal June 2020
Connecting central carbon and aromatic amino acid metabolisms to improve de novo 2-phenylethanol production in Saccharomyces cerevisiae journal December 2019
High-Temperature Ethanol Fermentation and Transformation with Linear DNA in the Thermotolerant Yeast Kluyveromyces marxianus DMKU3-1042 journal December 2008
CRISPR-Mediated Genome Editing and Gene Repression in Scheffersomyces stipitis journal July 2018
Biotechnological production of 2-phenylethanol journal June 2002
Highly Multiplexed CRISPRi Repression of Respiratory Functions Enhances Mitochondrial Localized Ethyl Acetate Biosynthesis in Kluyveromyces marxianus journal October 2018
Super life - how and why ‘cell selection’ leads to the fastest-growing eukaryote: Control of highest eukaryotic growth rate journal December 2008
De novo biosynthesis of 2-phenylethanol in engineered Pichia pastoris journal February 2020
Developing a broad-range promoter set for metabolic engineering in the thermotolerant yeast Kluyveromyces marxianus journal December 2020
Ethyl acetate production by the elusive alcohol acetyltransferase from yeast journal May 2017
Bioproduction of the aroma compound 2-Phenylethanol in a solid-liquid two-phase partitioning bioreactor system by Kluyveromyces marxianus journal October 2009
Biosynthesis of 2-phenylethanol from glucose with genetically engineered Kluyveromyces marxianus journal July 2014
Iterative algorithm-guided design of massive strain libraries, applied to itaconic acid production in yeast journal July 2018
Stress-tolerant non-conventional microbes enable next-generation chemical biosynthesis journal January 2020
Tyrosine and Tryptophan Act through the Same Binding Site at the Dimer Interface of Yeast Chorismate Mutase journal July 1998
Host-Informed Expression of CRISPR Guide RNA for Genomic Engineering in Komagataella phaffii journal December 2019
A genetic toolbox for metabolic engineering of Issatchenkia orientalis journal May 2020
Overexpressing enzymes of the Ehrlich pathway and deleting genes of the competing pathway in Saccharomyces cerevisiae for increasing 2-phenylethanol production from glucose journal July 2016
Multilevel engineering of the upstream module of aromatic amino acid biosynthesis in Saccharomyces cerevisiae for high production of polymer and drug precursors journal July 2017
Biotechnological production of flavours and fragrances journal January 1998
Validating genome-wide CRISPR-Cas9 function improves screening in the oleaginous yeast Yarrowia lipolytica journal September 2019
Dual N- and C-Terminal Helices Are Required for Endoplasmic Reticulum and Lipid Droplet Association of Alcohol Acetyltransferases in Saccharomyces cerevisiae journal August 2014
Kluyveromyces marxianus: A yeast emerging from its sister's shadow journal February 2010
Characterization of Saccharomyces cerevisiae promoters for heterologous gene expression in Kluyveromyces marxianus journal August 2012
CRISPR–Cas9-enabled genetic disruptions for understanding ethanol and ethyl acetate biosynthesis in Kluyveromyces marxianus journal June 2017
Understanding the stress responses of Kluyveromyces marxianus after an arrest during high-temperature ethanol fermentation based on integration of RNA-Seq and metabolite data journal January 2019
Alleviation of feedback inhibition in Saccharomyces cerevisiae aromatic amino acid biosynthesis: Quantification of metabolic impact journal May 2008
Simultaneous integration of multiple genes into the Kluyveromyces marxianus chromosome journal September 2013
Phylogeny of the genus Kluyveromyces inferred from the mitochondrial cytochrome-c oxidase II gene journal January 2000
Establishment of a yeast platform strain for production of p-coumaric acid through metabolic engineering of aromatic amino acid biosynthesis journal September 2015
Coevolution of transcriptional and allosteric regulation at the chorismate metabolic branch point of Saccharomyces cerevisiae journal November 2000
Metabolic engineering delivers next-generation biofuels journal March 2008
Building microbial factories for the production of aromatic amino acid pathway derivatives: From commodity chemicals to plant-sourced natural products journal March 2020
Innovating a Nonconventional Yeast Platform for Producing Shikimate as the Building Block of High-Value Aromatics journal September 2016
Multiplexed CRISPR Activation of Cryptic Sugar Metabolism Enables Yarrowia Lipolytica Growth on Cellobiose journal May 2018
Engineering Yarrowia lipolytica as a Chassis for De Novo Synthesis of Five Aromatic-Derived Natural Products and Chemicals journal July 2020
Biological Parts for Kluyveromyces marxianus Synthetic Biology journal May 2019
Genome and metabolic engineering in non-conventional yeasts: Current advances and applications journal September 2017