Applied Biochemistry and Biotechnology

, Volume 188, Issue 4, pp 1134–1144 | Cite as

Characterization of Two Polyketide Synthases Involved in Sorbicillinoid Biosynthesis by Acremonium chrysogenum Using the CRISPR/Cas9 System

  • Guozhi Chen
  • Ju ChuEmail author


Acremonium chrysogenum is an important fungal strain used for cephalosporin C production. Many efforts have been made to develop versatile genome-editing tools to better understand the mechanism of A. chrysogenum. Here, we developed a feasible and efficient CRISPR/Cas9 system. Two genes responsible for the synthesis of yellow pigments (sorbicillinoids) were chosen as targets, and plasmids expressing both the Cas9 protein and single-guide RNAs were constructed. After introducing the plasmids into the protoplasts of A. chrysogenum, 83 to 93% albino mutants harboring the expected genomic alteration, on average, were obtained. We have generated two mutant strains that respectively disrupt sorA and sorB by flexible CRISPR/Cas9 system. We further confirmed that the sorbicillinoid biosynthetic gene cluster is regulated by an autoinduction mechanism. This work will lay a solid foundation for gene function research and regulation in the sorbicillinoid biosynthetic pathway.


Acremonium chrysogenum CRISPR/Cas9 Genome editing Sorbicillinoid 



Clustered regularly interspaced short palindromic repeats/Cas9


Single-guide RNAs






Hepatitis delta virus


Polyketide synthase


China General Microbiological Culture Collection Center


Highly reducing





We acknowledge our colleague Dr. Liming Ouyang at ECUST China for her constructive discussion on this work.

Funding Information

This work was financially subsidized by NOW-MoST Joint Program (2013DFG32630) and partially supported by National Basic Research Program (973 program 2012CB721006).

Compliance with Ethical Standards

We confirm that this manuscript has not been published elsewhere and is not under consideration by another journal. All authors have approved the manuscript and agree with submission to Applied Biochemistry and Biotechnology.

Conflict of Interest

The authors declare that they have no competing interests.

Supplementary material

12010_2019_2960_MOESM1_ESM.docx (20 kb)
ESM 1 (DOCX 19 kb)


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.State Key Laboratory of Bioreactor EngineeringEast China University of Science and TechnologyShanghaiPeople’s Republic of China

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