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A new approach to Cas9-based genome editing in Aspergillus niger that is precise, efficient and selectable

Journal Article · · PLoS ONE
 [1];  [2];  [3];  [4];  [5];  [4];  [6]
  1. Swiss Federal Institute of Technology Lausanne (Switzerland); Joint Bioenergy Institute, Emeryville, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Joint Bioenergy Institute, Emeryville, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  3. Univ. of California, Berkeley, CA (United States)
  4. Joint Bioenergy Institute, Emeryville, CA (United States); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  5. Joint Bioenergy Institute, Emeryville, CA (United States); Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  6. Joint Bioenergy Institute, Emeryville, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Aspergillus niger and other filamentous fungi are widely used in industry, but efficient genetic engineering of these hosts remains nascent. For example, while molecular genetic tools have been developed, including CRISPR/Cas9, facile genome engineering of A. niger remains challenging. To address these challenges, we have developed a simple Cas9-based gene targeting method that provides selectable, iterative, and ultimately marker-free generation of genomic deletions and insertions. This method leverages locus-specific "popout" recombination to suppress off-target integrations. We demonstrated the effectiveness of this method by targeting the phenotypic marker albA and validated it by targeting the glaA and mstC loci. After two selection steps, we observed 100% gene editing efficiency across all three loci. This method greatly reduces the effort required to engineer the A. niger genome and overcomes low Cas9 transformations efficiency by eliminating the need for extensive screening. This method represents a significant addition to the A. niger genome engineering toolbox and could be adapted for use in other organisms. It is expected that this method will impact several areas of industrial biotechnology, such as the development of new strains for the secretion of heterologous enzymes and the discovery and optimization of metabolic pathways.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Bioenergy Technologies Office (EE-3B); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
AC05-76RL01830; AC02-05CH11231
OSTI ID:
1508517
Alternate ID(s):
OSTI ID: 1559178
Report Number(s):
PNNL-SA--142504
Journal Information:
PLoS ONE, Journal Name: PLoS ONE Journal Issue: 1 Vol. 14; ISSN 1932-6203
Publisher:
Public Library of ScienceCopyright Statement
Country of Publication:
United States
Language:
English

References (48)

Chromatin accessibility and guide sequence secondary structure affect CRISPR-Cas9 gene editing efficiency journal June 2017
A positive selection for mutants lacking orotidine-5′-phosphate decarboxylase activity in yeast: 5-fluoro-orotic acid resistance journal November 1984
Biosynthesis of Calcite Nanocrystal by a Novel Polyextremophile Bhargavaea cecembensis-Related Strain Isolated from Sandy Soil journal February 2022
Recombinant expression systems in the pharmaceutical industry journal July 2004
Forward genetics screen coupled with whole-genome resequencing identifies novel gene targets for improving heterologous enzyme production in Aspergillus niger journal January 2018
Ku80 Gene is Related to Non-Homologous End-Joining and Genome Stability in Aspergillus niger journal January 2011
Selection of multiple disruption events in Aspergillus fumigatus using the orotidine-5′-decarboxylase gene, pyrG, as a unique transformation marker journal June 1996
Cloning, characterization and molecular docking of a highly thermostable β-1,4-glucosidase from Thermotoga petrophila journal June 2012
Improving cellulase production by Aspergillus niger using adaptive evolution journal February 2016
Improvement of Soybean; A Way Forward Transition from Genetic Engineering to New Plant Breeding Technologies journal February 2022
Genetic engineering of filamentous fungi — Progress, obstacles and future trends journal March 2008
CRISPR system in filamentous fungi: Current achievements and future directions journal September 2017
Highly efficient gene targeting in the Aspergillus niger kusA mutant journal March 2007
Development of a versatile and conventional technique for gene disruption in filamentous fungi based on CRISPR-Cas9 technology journal August 2017
A rapid method for efficient gene replacement in the filamentous fungus Aspergillus nidulans journal November 2000
Genome engineering in Saccharomyces cerevisiae using CRISPR-Cas systems journal March 2013
Characterization of double-strand break-induced recombination: homology requirements and single-stranded DNA formation journal February 1992
Gene Conversion Tracts from Double-Strand Break Repair in Mammalian Cells journal January 1998
Development of apyrGMutant ofAspergillus oryzaeStrain S1 as a Host for the Production of Heterologous Proteins journal January 2013
Discovery and characterization of ionic liquid-tolerant thermophilic cellulases from a switchgrass-adapted microbial community journal January 2014
Methods for genetic transformation of filamentous fungi journal October 2017
Evaluation of off-target and on-target scoring algorithms and integration into the guide RNA selection tool CRISPOR journal July 2016
The synergetic effects of two CCAAT boxes in Aspergillus niger glaA gene promoter on activation of PglaA transcription journal January 2004
A CRISPR-Cas9 System for Genetic Engineering of Filamentous Fungi journal July 2015
Efficient genome editing using tRNA promoter-driven CRISPR/Cas9 gRNA in Aspergillus niger journal August 2018
A positive selection for mutants lacking orotidine-5′-phosphate decarboxylase activity in yeast: 5-fluoro-orotic acid resistance journal November 1984
CRISPR/Cas9-based genome editing of the filamentous fungi: the state of the art journal September 2017
An autonomously replicating plasmid transforms Aspergillus nidulans at high frequency journal February 1991
Filamentous fungi as cell factories for heterologous protein production journal May 2002
Production of recombinant proteins by filamentous fungi journal September 2012
Detection of on-target and off-target mutations generated by CRISPR/Cas9 and other sequence-specific nucleases journal January 2017
Gene targeting in filamentous fungi: the benefits of impaired repair journal February 2007
Characterization of a polyketide synthase in Aspergillus niger whose product is a precursor for both dihydroxynaphthalene (DHN) melanin and naphtho-γ-pyrone journal April 2011
Genome editing in Ustilago maydis using the CRISPR–Cas system journal April 2016
Efficient oligo nucleotide mediated CRISPR-Cas9 gene editing in Aspergilli journal June 2018
Food-processing enzymes from recombinant microorganisms—a review journal July 2006
Cas9 as a versatile tool for engineering biology journal September 2013
Strategies for the transformation of filamentous fungi journal February 2002
Expression of a site-specific endonuclease stimulates homologous recombination in mammalian cells. journal June 1994
A Programmable Dual-RNA-Guided DNA Endonuclease in Adaptive Bacterial Immunity journal June 2012
The new frontier of genome engineering with CRISPR-Cas9 journal November 2014
Characterization of double-strand break-induced recombination: homology requirements and single-stranded DNA formation. journal February 1992
Gene Conversion Tracts from Double-Strand Break Repair in Mammalian Cells journal January 1998
Stimulation of Homologous Recombination through Targeted Cleavage by Chimeric Nucleases journal January 2001
Detection of on-target and off-target mutations generated by CRISPR/Cas9 and other sequence-specific nucleases text January 2017
Microbial Enzymes: Tools for Biotechnological Processes journal January 2014
Evaluation of off-target and on-target scoring algorithms and integration into the guide RNA selection tool CRISPOR collection January 2016
Nucleosomes impede Cas9 access to DNA in vivo and in vitro journal March 2016

Cited By (3)

CRISPR/Cas9 genome editing technology in filamentous fungi: progress and perspective journal July 2019
Upgrading of efficient and scalable CRISPR–Cas-mediated technology for genetic engineering in thermophilic fungus Myceliophthora thermophila journal December 2019
Efficient marker free CRISPR/Cas9 genome editing for functional analysis of gene families in filamentous fungi journal September 2019

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