Evidence map›Paper›PMID 30653574›Full record

ArticlePloS one2019

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

Laure M C Leynaud-Kieffer, Samuel C Curran, Irene Kim, Jon K Magnuson, John M Gladden, Scott E Baker, Blake A Simmons

Abstract read
In one paragraph

Article in PloS one, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

21 citing papers in PubMed.

  1. Article
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  8. Impact of overexpressing NADH kinase on glucoamylase production in Aspergillus niger.Journal of industrial microbiology & biotechnology · 2022
    Article
  9. CRISPR/Cas9-Based Genome Editing and Its Application inJournal of fungi (Basel, Switzerland) · 2022
    Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Laure M C Leynaud-KiefferSwiss Federal Institute of Technology Lausanne, Lausanne, Vaud, Switzerland.ORCID 0000-0002-2074-9903
Samuel C CurranJoint Bioenergy Institute, Emeryville, CA, United States of America.
Irene KimDepartment of Chemistry, University of California, Berkeley, CA, United States of America.
Jon K MagnusonJoint Bioenergy Institute, Emeryville, CA, United States of America.
John M GladdenJoint Bioenergy Institute, Emeryville, CA, United States of America.
Scott E BakerJoint Bioenergy Institute, Emeryville, CA, United States of America.
Blake A SimmonsJoint Bioenergy Institute, Emeryville, CA, United States of America.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

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 "pop-out" 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.

Indexed as

Aspergillus nigerCRISPR-Cas SystemsGene EditingGene TargetingGenome, FungalGenomics

Identifiers

PMID30653574
PMCPMC6336261

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.