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Biotechnology Letters

, Volume 40, Issue 6, pp 981–987 | Cite as

Subcellular localization defines modification and production of Δ9-tetrahydrocannabinolic acid synthase in transiently transformed Nicotiana benthamiana

  • Marcus Geissler
  • Jascha Volk
  • Felix Stehle
  • Oliver Kayser
  • Heribert Warzecha
Original Research Paper

Abstract

Objective

Through heterologous expression of the tetrahydrocannabinolic acid synthase (THCAS) coding sequence from Cannabis sativa L. in Nicotiana benthamiana, we evaluated a transient plant-based expression system for the production of enzymes involved in cannabinoid biosynthesis.

Results

Thcas was modularized according to the GoldenBraid grammar and its expression tested upon alternative subcellular localization of the encoded catalyst with and without fusion to a fluorescent protein. THCAS was detected only when ER targeting was used; cytosolic and plastidal localization resulted in no detectable protein. Moreover, THCAS seems to be glycosylated in N. benthamiana, suggesting that this modification might have an influence on the stability of the protein. Activity assays with cannabigerolic acid as a substrate showed that the recombinant enzyme produced not only THCA (123 ± 12 fkat g FW −1 activity towards THCA production) but also cannabichromenic acid (CBCA; 31 ± 2.6 fkat g FW −1 activity towards CBCA production).

Conclusion

Nicotiana benthamiana is a suitable host for the generation of cannabinoid producing enzymes. To attain whole pathway integration, careful analysis of subcellular localization is necessary.

Keywords

Cannabinoids Cannabis sativa L. Modular cloning Plant metabolic engineering Tetrahydrocannabinolic acid synthase (THCAS) Tobacco 

Notes

Supporting information

Supplementary Fig. 1—Localization of THCAS fused with YFP and targeted to the apoplast (er), chloroplast (cp) or without a targeting signal. Plants solely producing YFP served as a positive control.

Supplementary material

10529_2018_2545_MOESM1_ESM.docx (569 kb)
Supplementary material 1 (DOCX 569 kb)

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  • Marcus Geissler
    • 1
  • Jascha Volk
    • 1
  • Felix Stehle
    • 2
  • Oliver Kayser
    • 2
  • Heribert Warzecha
    • 1
  1. 1.Plant Biotechnology and Metabolic EngineeringTechnische Universität DarmstadtDarmstadtGermany
  2. 2.Laboratory of Technical Biochemistry, Department of Biochemical and Chemical EngineeringTU Dortmund UniversityDortmundGermany

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