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Chloroplast Cell-Free Systems from Different Plant Species as a Rapid Prototyping Platform

MPS-Authors

Böhm,  Clemens V.
Max Planck Institute for Terrestrial Microbiology_others, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

Inckemann,  René
Max Planck Institute for Terrestrial Microbiology_others, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

Brinkmann,  Cedric K.
Max Planck Institute for Terrestrial Microbiology_others, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

Lipinska,  Katarzyna E.
Max Planck Institute for Terrestrial Microbiology_others, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

Gilles,  Sara
Max Planck Institute for Terrestrial Microbiology_others, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

Niederholtmeyer,  Henrike
Max Planck Institute for Terrestrial Microbiology_others, Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

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Citation

Böhm, C. V., Inckemann, R., Burgis, M., Baumann, J., Brinkmann, C. K., Lipinska, K. E., et al. (2024). Chloroplast Cell-Free Systems from Different Plant Species as a Rapid Prototyping Platform. ACS Synthetic Biology, 13(8), 2412-2424. doi:10.1021/acssynbio.4c00117.


Cite as: https://hdl.handle.net/21.11116/0000-000F-976F-B
Abstract
Climate change poses a significant threat to global agriculture, necessitating innovative solutions. Plant synthetic biology, particularly chloroplast engineering, holds promise as a viable approach to this challenge. Chloroplasts present a variety of advantageous traits for genetic engineering, but the development of genetic tools and genetic part characterization in these organelles is hindered by the lengthy time scales required to generate transplastomic organisms. To address these challenges, we have established a versatile protocol for generating highly active chloroplast-based cell-free gene expression (CFE) systems derived from a diverse range of plant species, including wheat (monocot), spinach, and poplar trees (dicots). We show that these systems work with conventionally used T7 RNA polymerase as well as the endogenous chloroplast polymerases, allowing for detailed characterization and prototyping of regulatory sequences at both transcription and translation levels. To demonstrate the platform for characterization of promoters and 5′ and 3′ untranslated regions (UTRs) in higher plant chloroplast gene expression, we analyze a collection of 23 5′UTRs, 10 3′UTRs, and 6 chloroplast promoters, assessed their expression in spinach and wheat extracts, and found consistency in expression patterns, suggesting cross-species compatibility. Looking forward, our chloroplast CFE systems open new avenues for plant synthetic biology, offering prototyping tools for both understanding gene expression and developing engineered plants, which could help meet the demands of a changing global climate.