Abstract
Plants synthesize a large number of isoprenoid compounds that have diverse structures and functions. All isoprenoids are synthesized through consecutive condensation of five-carbon precursors, isopentenyl diphosphate (IPP) and its allyl isomer dimethylallyl diphosphate (DMAPP). With recent success in the cloning of genes that encode the enzymes of isoprenoid biosynthesis, genetic engineering strategies for the improvement of plant isoprenoid metabolism have emerged. Plastid transformation technology offers attractive features in plant genetic engineering. It has many advantages over nuclear genome transformation: high-level foreign protein expression, no need for a transit peptide, absence of gene silencing, and convenient transgene stacking in operons. We demonstrated that this technology is a remarkable tool for the production of isoprenoids in plants through metabolic engineering. The expression of bacterial genes encoding CrtW (β-carotene ketolase) and CrtZ (β-carotene hydroxylase) or cyanobacterial genes encoding DXR (1-deoxy-d-xylulose-5-phosphate reductoisomerase) in the plastid genome leads to alteration in isoprenoid content of tobacco leaves.
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Acknowledgments
The authors would like to thank Professor Norihiko Misawa (Marine Biotechnology Institute: presently at Ishikawa Prefectural University) for his advice and encouragement and Dr. Shinya Takeno, Dr. Satomi Yoshimura and Yuki Shinzaki for technical assistance.
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Hasunuma, T., Kondo, A., Miyake, C. (2010). Metabolic Engineering by Plastid Transformation as a Strategy to Modulate Isoprenoid Yield in Plants. In: Fett-Neto, A. (eds) Plant Secondary Metabolism Engineering. Methods in Molecular Biology, vol 643. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-60761-723-5_15
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DOI: https://doi.org/10.1007/978-1-60761-723-5_15
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