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Mobius Assembly for Plant Systems highlights promoter-terminator interaction in gene regulation

View ORCID ProfileAndreas I. Andreou, Jessica Nirkko, Marisol Ochoa-Villarreal, View ORCID ProfileNaomi Nakayama
doi: https://doi.org/10.1101/2021.03.31.437819
Andreas I. Andreou
1Institute of Molecular Plant Sciences, School of Biological Sciences, University of Edinburgh
2SynthSys Centre for Synthetic and Systems Biology, University of Edinburgh
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  • ORCID record for Andreas I. Andreou
Jessica Nirkko
1Institute of Molecular Plant Sciences, School of Biological Sciences, University of Edinburgh
2SynthSys Centre for Synthetic and Systems Biology, University of Edinburgh
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Marisol Ochoa-Villarreal
1Institute of Molecular Plant Sciences, School of Biological Sciences, University of Edinburgh
2SynthSys Centre for Synthetic and Systems Biology, University of Edinburgh
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Naomi Nakayama
1Institute of Molecular Plant Sciences, School of Biological Sciences, University of Edinburgh
2SynthSys Centre for Synthetic and Systems Biology, University of Edinburgh
3Centre for Science at Extreme Conditions, University of Edinburgh
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  • For correspondence: n.nakayama@imperial.ac.uk
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ABSTRACT

Plant synthetic biology is a fast-evolving field that employs engineering principles to empower research and bioproduction in plant systems. Nevertheless, in the whole synthetic biology landscape, plant systems lag compared to microbial and mammalian systems. When it comes to multigene delivery to plants, the predictability of the outcome is decreased since it depends on three different chassis: E. coli, Agrobacterium, and the plant species. Here we aimed to develop standardised and streamlined tools for genetic engineering in plant synthetic biology. We have devised Mobius Assembly for Plant Systems (MAPS), a user-friendly Golden Gate Assembly system for fast and easy generation of complex DNA constructs. MAPS is based on a new group of small plant binary vectors (pMAPs) that contains an origin of replication from a cryptic plasmid of Paracoccus pantotrophus. The functionality of the pMAP vectors was confirmed by transforming the MM1 cell culture, demonstrating for the first time that plant transformation is dependent on the Agrobacterium strains and plasmids; plasmid stability was highly dependent on the plasmid and bacterial strain. We made a library of new short promoters and terminators and characterised them using a high-throughput protoplast expression assay. Our results underscored the strong influence of terminators in gene expression, and they altered the strength of promoters in some combinations and indicated the presence of synergistic interactions between promoters and terminators. Overall this work will further facilitate plant synthetic biology and contribute to improving its predictability, which is challenged by combinatorial interactions among the genetic parts, vectors, and chassis.

Competing Interest Statement

The authors have declared no competing interest.

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted March 31, 2021.
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Mobius Assembly for Plant Systems highlights promoter-terminator interaction in gene regulation
Andreas I. Andreou, Jessica Nirkko, Marisol Ochoa-Villarreal, Naomi Nakayama
bioRxiv 2021.03.31.437819; doi: https://doi.org/10.1101/2021.03.31.437819
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Mobius Assembly for Plant Systems highlights promoter-terminator interaction in gene regulation
Andreas I. Andreou, Jessica Nirkko, Marisol Ochoa-Villarreal, Naomi Nakayama
bioRxiv 2021.03.31.437819; doi: https://doi.org/10.1101/2021.03.31.437819

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