Homoglutathione Synthesis in Transgenic Tobacco Plants Expressing Soybean Homoglutathione Synthetase
Homoglutathione Synthesis in Transgenic Tobacco Plants Expressing Soybean Homoglutathione Synthetase
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表达大豆同谷胱甘肽合成酶的转基因烟草植物中的同谷胱甘肽合成
DOI:
10.5511/plantbiotechnology.21.79
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发表时间:
2004
影响因子:
1.6
通讯作者:
J. Sekiya
中科院分区:
文献类型:
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作者:
A. Sugiyama;J. Nishimura*;Yasuhiro Mochizuki;Keisuke Inagaki;J. Sekiya
Homoglutathione (hGSH) is present in some leguminous plants including soybean and bean. However, hGSH synthesis in non-leguminous plants has not been reported so far. We constructed transgenic tobacco plants expressing soybean hGSH synthetase (hGSHS). Although the transgenic tobacco plants exhibited higher hGSHS activity than glutathione (GSH) synthetase activity, hGSH content was much lower than GSH content. Precursor feeding experiments revealed that hGSH synthesis was limited by the availability of both γ-L-glutamyl-L-cysteine and β-alanine. The result also suggests that the major site of GSH synthesis in tobacco plants is not cytosol.
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