Improving cellulase production by Aspergillus niger using adaptive evolution

Aleksandrina Patyshakuliyeva, Mark Arentshorst, Iris E. Allijn, Arthur F.J. Ram, Ronald P. de Vries, Isabelle Benoit Gelber*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

12 Citations (Scopus)
2 Downloads (Pure)

Abstract

Objectives: To evaluate the potential of adaptive evolution as a tool in generating strains with an improved production of plant biomass degrading enzymes. Results: An Aspergillus niger cellulase mutant was obtained by adaptive evolution. Physiological properties of this mutant revealed a five times higher cellulose production than the parental strain. Transcriptomic analysis revealed that the expression of noxR, encoding the regulatory subunit of the NADPH oxidase complex, was reduced in the mutant compared to the parental strain. Subsequent analysis of a noxR knockout strain showed the same phenotypic effect as observed for the evolution mutant, confirming the role of NoxR in cellulose degradation. Conclusions: Adaptive evolution is an efficient approach to modify a strain and activate genes involved in polysaccharide degradation.

Original languageEnglish
Pages (from-to)969-974
Number of pages6
JournalBiotechnology letters
Volume38
Issue number6
Early online date15 Feb 2016
DOIs
Publication statusPublished - Jun 2016
Externally publishedYes

Keywords

  • Adaptive evolution
  • Aspergillus niger
  • Cellulose
  • NADPH oxidase
  • NoxR

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