数字农科院2.0

Cloning, silencing, and prokaryotic expression of strawberry sucrose synthase gene FaSus1

文献类型： 外文期刊

作者： Hua, L. N.;Zang, M.;Wang, S. F.;Shen, Y. Y.;Guo, J. X.;Li, Y. Z.

作者机构：

关键词： Strawberry fruit ripening;hairpin-mediated RNA interference;sucrose synthase FaSus1;prokaryotic expression;enzymatic activity;sucrose

期刊名称： JOURNAL OF HORTICULTURAL SCIENCE & BIOTECHNOLOGY

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年卷期：

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收录情况： SCI

摘要： The sucrose synthase (Sus) gene is regarded to be involved in strawberry fruit ripening; however, direct molecular and biochemical evidence is lacking. Here, the coding cDNA sequence of FaSus1 was cloned by RT-PCR and both a hairpin-mediated RNA interference pBI121 vector and a recombinant E. coli expression PET28a vector were constructed. These vectors were then used to transform strawberry fruit and for prokaryotic expression in strain BL21, respectively. The results showed that hairpin-mediated RNA silencing of FaSus1 led to a decrease in sucrose content and inhibited fruit ripening. Enzymatic activity analysis of FaSus1 showed that the reaction system contains 0.309 mg of recombinant FaSus1 protein, reaching 0.617 mg/mL. The cleavage activity of the enzyme was 0.25 U with a specific activity of 0.812 U/mg, whilst the synthetic activity of the enzyme was 0.057 U with a specific activity of 0.185 U/mg. This study provides physiological, molecular, and biochemical evidence to demonstrate that the FaSus1 has high sucrolysis activity and plays an important role in the regulation of strawberry fruit ripening.

分类号： S6

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