帅良;李静;韩冬梅;吴振先;

• 1:华南农业大学园艺学院
• 2:广东省农业科学院果树研究所
• 3:广东省果蔬保鲜重点实验室

摘要(Abstract)：

【目的】探讨龙眼果实亚硫酸盐氧化酶基因(DlSO)在硫残留生物降解中的作用。【方法】以龙眼总RNA为模板,采用RT-PCR结合RACE法获得龙眼亚硫酸盐氧化酶基因全长cDNA序列,命名为DlSO;运用荧光定量PCR对其表达量进行分析;使用ClontechIn-Fusion技术构建原核表达载体,使其在Rosetta(DE3)大肠杆菌中表达。【结果】DlSO序列全长1413bp,包含一个1182bp的开放阅读框,一个长37bp的5’非翻译区序列和194bp的3’非翻译区,预测编码393个氨基酸;同源性和系统进化分析结果均表明DlSO与毛果杨SO亲缘关系最近;荧光定量结果表明,在龙眼不同组织中,DlSO基因都有表达,其中在叶片中表达量最高,其次是花、幼果、根和果肉,在茎和果皮组织中DlSO基因的表达量最低;成功构建pET-32a-DlSO原核表达载体,经IPTG诱导后在Rosetta(DE3)大肠杆菌中成功表达。【结论】克隆了龙眼亚硫酸盐氧化酶基因(DlSO),并且成功构建了pET-32a-DlSO原核表达载体,经IPTG诱导在大肠杆菌中成功表达出融合蛋白,为下一步研究龙眼亚硫酸盐氧化酶的作用奠定了基础。

关键词(KeyWords)： 龙眼;亚硫酸盐氧化酶;基因克隆;荧光定量PCR;原核表达

Abstract:

Keywords:

基金项目(Foundation): 国家现代农业产业技术体系(荔枝龙眼)(CARS-33-14)

作者(Author): 帅良;李静;韩冬梅;吴振先;

Email:

DOI: 10.13925/j.cnki.gsxb.20140251

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