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小麦磷脂酶Dα的基因克隆及其编码序列的生物信息学分析

DOI: 10.3969/j.issn.1000-7091.2013.01.022, PP. 117-122

Keywords: 小麦,磷脂酶D&alpha,基因克隆,生物信息学

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Abstract:

为获得更多小麦抗逆基因资源,利用RT-PCR方法克隆了磷脂酶D基因(PLD),命名为TaPLDα,并对基因及其蛋白进行了生物信息学分析。结果表明,TaPLDα开放阅读框为2394bp,编码812个氨基酸残基,等电点5.30,分子量为92kDa。序列分析显示,TaPLDα基因编码的氨基酸序列含有N端C2结构域及2个保守的活性中心。预测TaPLDα蛋白是一个亲水性稳定蛋白且定位于细胞质,其二级结构含28.82%的α-螺旋、20.07%的延伸链、6.03%的β-转角和45.07%的不规则卷曲。该蛋白不存在信号肽,无跨膜区。TaPLDα与水稻、玉米和拟南芥的PLDα氨基酸序列之间具有高度的保守性,进化分析显示,小麦PLDα序列与毒麦、水稻和玉米PLD序列亲缘关系密切。

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