Abstract
Key message
Novel episomal systems have the potential to accelerate plastid genetic engineering for application in plant synthetic biology.
Abstract
Plastids represent valuable subcellular compartments for genetic engineering of plants with intrinsic advantages to engineering the nucleus. The ability to perform site-specific transgene integration by homologous recombination (HR), coordination of transgene expression in operons, and high production of heterologous proteins, all make plastids an attractive target for synthetic biology. Typically, plastid engineering is performed by homologous recombination; however, episomal-replicating vectors have the potential to accelerate the design/build/test cycles for plastid engineering. By accelerating the timeline from design to validation, it will be possible to generate translational breakthroughs in fields ranging from agriculture to biopharmaceuticals. Episomal-based plastid engineering will allow precise single step metabolic engineering in plants enabling the installation of complex synthetic circuits with the ambitious goal of reaching similar efficiency and flexibility of to the state-of-the-art genetic engineering of prokaryotic systems. The prospect to design novel episomal systems for production of transplastomic marker-free plants will also improve biosafety for eventual release in agriculture.
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This study was funded by United States Department of Agriculture (USDA)/National Institute of Food and Agriculture (NIFA), Award No. 2022-33522-38289.
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AO and SCL conceived, wrote, and approved the manuscript.
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Communicated by Günther Hahne.
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Occhialini, A., Lenaghan, S.C. Plastid engineering using episomal DNA. Plant Cell Rep 42, 1125–1132 (2023). https://doi.org/10.1007/s00299-023-03020-x
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DOI: https://doi.org/10.1007/s00299-023-03020-x