Abstract
Human growth hormone (hGH), a pituitary-derived polypeptide, evidences a wide range of biological functions, including protein synthesis, cell proliferation, and metabolism. A synthetic hGH gene (shGH) has been synthesized on the basis of plant-optimized codon usage via an overlap PCR strategy and located in a plant expression vector under the control of the rice amylase 3D (Ramy3D) promoter, which is induced by sugar starvation. The plant expression vector was introduced into rice calli (Oryza sativa L. cv. Donjin) via particle bombardment transformation methods. The integration of the shGH gene into the chromosome of the transgenic rice callus was verified via genomic DNA PCR amplification and shGH expression in transgenic rice suspension cells was confirmed via Northern blot analysis. The shGH protein was detected in the transgenic rice cell suspension culture medium following induction with sugar starvation, using Western blot analysis. The quantity of shGH that accumulated in the transgenic rice cell suspension medium was 57 mg/l. The shGH accumulated in the transgenic rice cell suspension culture medium evidenced a biological activity similar to that of Escherichia coli-derived recombinant hGH. These results indicate that the shGH was generated and accumulated in the transgenic rice cell suspension culture medium, and manifested biological activity.
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This paper was supported by Ministry of Commerce, Industry and Energy.
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Communicated by J.R. Liu.
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Kim, TG., Baek, MY., Lee, EK. et al. Expression of human growth hormone in transgenic rice cell suspension culture. Plant Cell Rep 27, 885–891 (2008). https://doi.org/10.1007/s00299-008-0514-0
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DOI: https://doi.org/10.1007/s00299-008-0514-0