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Position: Home > Articles > Prokaryotic expression, purification and characterization of a novel rice seed lipoxygenase gene OsLOX1. Rice Science 2008,15 (2) 88-94

Prokaryotic expression, purification and characterization of a novel rice seed lipoxygenase gene OsLOX1.

作者：

Wang Ren;Shen WenBiao;Liu LingLong;Jiang Ling;Zhai HuQu;Wan JianMin

单位：

State Key Laboratory of Crop Genetics and Germplasm Enhancement/Jiangsu Plant Gene Engineering Research Center; Beijing 100081;Institute of Crop Sciences; Chinese Academy of Agricultural Sciences; Nanjing 210095; China; Nanjing Agricultural University

关键词：

enzymes;gene expression;genes;genetic engineering;genetic transformation;in vitro;lipoxygenase;protein content;rice;seeds;Escherichia coli;Oryza;Oryza sativa

摘要：

Lipoxygenase (LOX, EC1.13.11.12) is a key enzyme during the degradation of lipids in animals and even plants, and also the first key enzyme responsible for the biosynthesis of jasmonate. To purify and characterize the OsLOX1 gene from rice seeds, the entire coding region of the OsLOX1 gene was inserted into an expression vector pET30a(+) and transformed into Escherichia coli BL21 (DE3). Expression of the fusion protein was successfully induced by isopropyl- beta -D-thiogalactopyranoside (IPTG) and the purified recombinant protein was obtained by His.BindReg. Kits. Further assay showed that the purified recombinant protein exhibited the LOX activity. The optimum pH was 4.8 (acetate buffer) and the optimum temperature was 30 degrees C for the above enzyme. Thus, the recombinant might confer an available usage for the synthesis of jasmonate in vitro, and also provides a possibility for elucidating the inter-relationship between the primary structure of the plant seed lipoxygenase protein and its physiological functions.

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Prokaryotic expression, purification and characterization of a novel rice seed lipoxygenase gene OsLOX1.

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