Cited by 312CRISPR and Genetic EngineeringAlgal biology and biofuel productionMicrobial Metabolic Engineering and Bioproduction

Genome editing of model oleaginous microalgae Nannochloropsis spp. by CRISPR /Cas9

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Wang, Qintao, Lu, Yandu, Xin, Yi, Wei, Li, Huang, Shi, Xu, Jian·2016·The Plant Journal

Abstract

Summary: Microalgae are promising feedstock for biofuels yet mechanistic probing of their cellular network and industrial strain development have been hindered by lack of genome‐editing tools. Nannochloropsis spp. are emerging model microalgae for scalable oil production and carbon sequestration. Here we established a CRISPR /Cas9‐based precise genome‐editing approach for the industrial oleaginous microalga Nannochloropsis oceanica , using nitrate reductase ( NR ; g7988) as example. A new screening procedure that compares between restriction enzyme‐digested nested PCR ( nPCR ) products derived from enzyme‐digested and not‐digested genomic DNA of transformant pools was developed to quickly, yet reliably, detect genome‐engineered mutants. Deep sequencing of nPCR products directly amplified from pooled genomic DNA revealed over an 1% proportion of 5‐bp deletion mutants and a lower frequency of 12‐bp deletion mutants, with both types of editing precisely located at the targeted site. The isolated mutants, in which precise deletion of five bases caused a frameshift in NR translation, grow normally under NH 4 Cl but fail to grow under Na NO 3 , and thus represent a valuable chassis strain for transgenic‐strain development. This demonstration of CRISPR /Cas9‐based genome editing in industrial microalgae opens many doors for microalgae‐based biotechnological applications.

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Authors
Wang, Q., Lu, Y., Xin, Y., Wei, L., Huang, S., & Xu, J.
Affiliations
  • Chinese Academy of Sciences (CN)
  • Single‐Cell Center CAS Key Laboratory of Biofuels and Shandong Key Laboratory of Energy Genetics Qingdao Institute of BioEnergy and Bioprocess Technology Chinese Academy of Sciences Qingdao Shandong 266101 China
Corresponding author
Xu, Jian
Venue
The Plant Journal
Publisher
Wiley
Published
2016-10-18
Volume
88
Issue
6
Pages
1071-1081
ISSN
  • 0960-7412 (ISSN-L)
  • 1365-313X
OpenAlex
W2518075094
Cited by
312
References
63
Citations by year
2026: 25 · 2025: 27 · 2024: 26 · 2023: 39 · 2022: 34 · 2021: 35 · 2020: 37 · 2019: 36 · 2018: 26 · 2017: 24 · 2016: 3
FWCI
15.42
Type
journal article
Language
en
Open access
Locations
  • The Plant Journal (publishedVersion)
  • PubMed (publishedVersion)
  • Institutional knowledge base (Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences) (submittedVersion)
Funders
  • National Natural Science Foundation of China (31425002, 91231205)
  • Ministry of Science and Technology of the People's Republic of China (2012CB721101, 2012AA02A707)
  • Chinese Academy of Sciences (KSZD‐EW‐Z‐017, ZDRW‐ZS‐2016‐3)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › CRISPR and Genetic Engineering
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial Metabolic Engineering and Bioproduction
Keywords
CRISPR/Cas9 genome editing, Nannochloropsis oceanica, oleaginous microalgae, nitrate reductase, deletion mutants, transgenic microalgae, chassis strain, microalgal biofuels, oil production, carbon sequestration, mutant screening, nested PCR
MeSH terms
Gene Editing, Polymerase Chain Reaction, Nitrate Reductase, Microalgae, CRISPR-Cas Systems

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