大豆Glyma.05G222700.2基因生物信息学与逆境表达分析

Bioinformatics and Expression Analysis Under Stress of Soybean Glyma.05g22700.2 Gene

为研究Glyma.05G222700.2基因编码的丝氨酸/苏氨酸蛋白激酶在抗非生物胁迫过程的功能和原理,促进大豆抗逆候选基因的开发利用,本研究通过生物信息学方法对大豆Glyma.05G222700.2基因进行同源序列、蛋白结构、进化树和转录组分析,通过qRT-PCR分析盐胁迫下大豆不同组织中该基因的表达情况。结果表明:该基因编码区长2 040 bp,编码697个氨基酸,预测分子量为656.54 kD,pI8.026。多序列比对发现Glyma.05G222700.2蛋白包含1个Pkinase结构域。进化树分析表明该蛋白与野大豆、刺毛黧豆、赤豆一致性较高。转录组数据表明Glyma.05G222700.2基因在大豆各组织中均有表达,其中在种子中表达量最高,在根中表达量最低。qRT-PCR结果发现Glyma.05G222700.2基因在毛状根、茎、叶中均有表达,在茎中表达量最高,在叶中表达量最低;在毛状根中盐胁迫12 h表达量达到极值,盐胁迫24 h表达量下降;在茎中表达量呈上升趋势,在24 h表达量达到极值;在叶中表达量不稳定,盐胁迫2 h该基因不表达,盐胁迫6 h该基因表达量达到极值并高于对照,盐胁迫12和24 h表达量低于对照。推断该基因可能在大豆抵抗盐胁迫过程中起到重要作用。

In order to study the function and principle of serine/threonine protein kinase encoded by Glyma.05 g22700.2 in the process of abiotic stress resistance, and promote the development and utilization of soybean stress resistant candidate genes, this study carried out the homology sequence, protein structure, phylogenetic tree and transcriptome analysis of soybean Glyma.05 G222700.2 gene by bioinformatics method, and analyzed the expression in different tissues of soybean with qRT-PCR under salt stress. The results showed that the coding region of this gene was 2 040 bp, encoding 697 amino acids, with predicted molecular weight of 656.54 kD and pI8.026. Multiple sequence alignment revealed that the Glyma.05 G222700.2 protein contained a Pkinase domain. Phylogenetic tree analysis showed that the protein had high consistency with wild soybean, mucuna, and red bean. Transcriptome data showed that the Glyma.05 G222700.2 gene was expressed in various tissues of soybean, among which the expression level was the highest in seeds and the lowest in roots. Fluorescence quantitative PCR results showed that the Glyma.05 G222700.2 gene was expressed in hairy roots, stems, and leaves under salt stress, with the highest expression in the stem and the lowest expression in the leaves. In the hairy roots, the expression reached the maximum at 12 h, and decreased at 24 h. The expression level in the stem increased and reached the maximum at 24 h. The expression of the gene was not stable in the leaves, and it didn′t express in the leaves for 2 h under salt stress. The expression of the leaves reached the extreme value at 6 h under salt stress and was higher than that of the control, and the expression under salt stress was lower than that of the control at 12 and 24 h. It is inferred that this gene may play an important role in the resistance of soybean to salt stress.