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Rational Promoter Engineering Enables Robust Terpene Production in Microalgae.

Alexander Einhaus¹, Thomas Baier¹, Marian Rosenstengel¹

¹Bielefeld University, Faculty of Biology, Center for Biotechnology (CeBiTec), Universitaetsstrasse 27, 33615 Bielefeld, Germany.

ACS Synthetic Biology

|March 25, 2021

Summary

Developing new genetic tools for microalgae like Chlamydomonas reinhardtii enhances sustainable bioproduct manufacturing. Engineered promoters significantly boosted the production of valuable compounds, paving the way for greener biotechnology.

Keywords:

Chlamydomonas reinhardtii microalga promoter engineering synthetic biology terpene

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Area of Science:

Microalgal biotechnology
Synthetic biology
Genetic engineering

Background:

Microalgal biotechnology offers sustainable, light-driven bioproduct production.
Chlamydomonas reinhardtii is a key model organism for microalgal synthetic biology.
Current limitations include low transgene titers and weak expression elements hindering its biotechnological potential.

Purpose of the Study:

To establish powerful new tools for nuclear engineering in microalgae.
To improve expression elements and synthetic biology applications in Chlamydomonas reinhardtii.
To enhance the production of valuable bioproducts using engineered microalgae.

Main Methods:

Systematic evaluation of existing expression elements.
Rational promoter engineering and development of novel synthetic expression elements.
Investigating synergism between PSAD 5' UTR and chloroplast targeting peptide.

Main Results:

Novel synthetic expression elements were established.
Standardized synthetic biology tools were improved.
A 18-fold increase in sesquiterpene (E)-α-bisabolene production was achieved through promoter engineering.
A 4-fold increase compared to commonly used expression elements was observed.

Conclusions:

The study significantly advances synthetic biology applications in microalgae.
Engineered expression elements and promoters improve microalgal bioproductivity.
Chlamydomonas reinhardtii is better positioned as a sustainable green cell-factory.