Plant Cell Reports

, Volume 32, Issue 4, pp 529–536

An E8 promoter–HSP terminator cassette promotes the high-level accumulation of recombinant protein predominantly in transgenic tomato fruits: a case study of miraculin

  • Natsuko Kurokawa
  • Tadayoshi Hirai
  • Mariko Takayama
  • Kyoko Hiwasa-Tanase
  • Hiroshi Ezura
Original Paper

DOI: 10.1007/s00299-013-1384-7

Cite this article as:
Kurokawa, N., Hirai, T., Takayama, M. et al. Plant Cell Rep (2013) 32: 529. doi:10.1007/s00299-013-1384-7

Abstract

Key message

The E8 promoter–HSP terminator expression cassette is a powerful tool for increasing the accumulation of recombinant protein in a ripening tomato fruit.

Abstract

Strong, tissue-specific transgene expression is a desirable feature in transgenic plants to allow the production of variable recombinant proteins. The expression vector is a key tool to control the expression level and site of transgene and recombinant protein expression in transgenic plants. The combination of the E8 promoter, a fruit-ripening specific promoter, and a heat shock protein (HSP) terminator, derived from heat shock protein 18.2 of Arabidopsis thaliana, produces the strong and fruit-specific accumulation of recombinant miraculin in transgenic tomato. Miraculin gene expression was driven by an E8 promoter and HSP terminator cassette (E8–MIR–HSP) in transgenic tomato plants, and the miraculin concentration was the highest in the ripening fruits, representing 30–630 μg miraculin of the gram fresh weight. The highest level of miraculin concentration among the transgenic tomato plant lines containing the E8–MIR–HSP cassette was approximately four times higher than those observed in a previous study using a constitutive 35S promoter and NOS terminator cassette (Hiwasa-Tanase et al. in Plant Cell Rep 30:113–124, 2011). These results demonstrate that the combination of the E8 promoter and HSP terminator cassette is a useful tool to increase markedly the accumulation of recombinant proteins in a ripening fruit-specific manner.

Keywords

Expression vector E8 promoter HSP terminator Miraculin Transgenic tomato plants 

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Natsuko Kurokawa
    • 1
  • Tadayoshi Hirai
    • 1
  • Mariko Takayama
    • 1
  • Kyoko Hiwasa-Tanase
    • 1
  • Hiroshi Ezura
    • 1
  1. 1.Graduate School of Life and Environmental SciencesUniversity of TsukubaTsukubaJapan

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