Metabolic engineering of Deinococcus radiodurans for pinene production from glycerol
Artikel i vetenskaplig tidskrift, 2021

Background: The objective of this work was to engineer Deinococcus radiodurans R1 as a microbial cell factory for the production of pinene, a monoterpene molecule prominently used for the production of fragrances, pharmaceutical products, and jet engine biofuels. Our objective was to produce pinene from glycerol, an abundant by-product of various industries. Results: To enable pinene production in D. radiodurans, we expressed the pinene synthase from Abies grandis, the geranyl pyrophosphate (GPP) synthase from Escherichia coli, and overexpressed the native 1-deoxy-d-xylulose 5-phosphate synthase. Further, we disrupted the deinoxanthin pathway competing for the substrate GPP by either inactivating the gene dr0862, encoding phytoene synthase, or substituting the native GPP synthase with that of E. coli. These manipulations resulted in a D. radiodurans strain capable of producing 3.2 ± 0.2 mg/L pinene in a minimal medium supplemented with glycerol, with a yield of 0.13 ± 0.04 mg/g glycerol in shake flask cultures. Additionally, our results indicated a higher tolerance of D. radiodurans towards pinene as compared to E. coli. Conclusions: In this study, we successfully engineered the extremophile bacterium D. radiodurans to produce pinene. This is the first study demonstrating the use of D. radiodurans as a cell factory for the production of terpenoid molecules. Besides, its high resistance to pinene makes D. radiodurans a suitable host for further engineering efforts to increase pinene titer as well as a candidate for the production of the other terpenoid molecules.

Metabolic engineering

Glycerol

Deinococcus radiodurans R1

Biofuel

Pinene

Monoterpene

Författare

Seyed Hossein Helalat

Danmarks Tekniske Universitet (DTU)

University of Isfahan

C. Jers

Danmarks Tekniske Universitet (DTU)

Mandana Bebahani

University of Isfahan

Hassan Mohabatkar

University of Isfahan

Ivan Mijakovic

Danmarks Tekniske Universitet (DTU)

Chalmers, Biologi och bioteknik, Systembiologi

Microbial Cell Factories

1475-2859 (ISSN)

Vol. 20 1 187

Ämneskategorier

Mikrobiologi

Biokatalys och enzymteknik

Annan industriell bioteknik

DOI

10.1186/s12934-021-01674-4

PubMed

34565367

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Senast uppdaterat

2021-10-06