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The nucleolus as a genomic safe harbor for strong in oceanica
Journal article   Open access   Peer reviewed

The nucleolus as a genomic safe harbor for strong in oceanica

Christian Sudfeld, Ana Pozo-Rodriguez, Sara A. Manjavacas Diez, Rene H. Wijffels, Maria J. Barbosa and Sarah D'Adamo
Molecular plant, Vol.15(2), pp.340-353
02/07/2022
DOI: 10.1016/j.molp.2021.11.003
PMID: 34775107
url
https://doi.org/10.1016/j.molp.2021.11.003View
Published (Version of record) Open Access

Abstract

Microalgae are used in food and feed, and they are considered a potential feedstock for sustainably pro-duced chemicals and biofuel. However, production of microalgal-derived chemicals is not yet economically feasible. Genetic engineering could bridge the gap to industrial application and facilitate the production of novel products from microalgae. Here, we report the discovery of a novel gene expression system in the oleaginous microalga Nannochloropsis that exploits the highly efficient transcriptional activity of RNA po-lymerase I and an internal ribosome entry site for translation. We identified the nucleolus as a genomic safe harbor for Pol I transcription and used it to construct transformant strains with consistently strong trans-gene expression. The new expression system provides an outstanding tool for genetic and metabolic en-gineering of microalgae and thus will probably make substantial contributions to microalgal research.
Biochemistry & Molecular Biology Life Sciences & Biomedicine Plant Sciences Science & Technology

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