极大螺旋藻藻胆蛋白α亚基基因的生物信息学分析

Bioinformatics Analysis on α Subunit Gene of Phycobiliprotein from Spirulina maxima

[目的]对极大螺旋藻藻胆蛋白α亚基进行分析研究,为该蛋白的后续研究提供依据。[方法]用生物信息学分析方法对已经在GenBank上登录的极大螺旋藻藻胆蛋白的α亚基基因(GenBank AF441177)及其翻译的氨基酸序列进行了其组成和相关性质的分析、蛋白质信号肽预测、跨膜结构域的预测及亲水性/疏水性的测定,同时构建了分子进化树,对上述结果进行了分析和探讨。[结果]该蛋白的氨基酸组成丰富,不仅含18种必需氨基酸还含有甘氨酸、天冬氨酸等非必需氨基酸;对该蛋白信号肽和跨膜结构域分析表明,其属于胞内蛋白;对该蛋白的亲水性分析表明,其属于亲水性蛋白;进化树分析表明,该蛋白与钝顶节旋藻的同源性高,达99%～100%。[结论]该研究为α亚基和β亚基之间的关系和相互作用提供了一定依据。

[Objective] The α subunit gene of phycobiliprotein from Spirulina maxima was studied in order to provide a basis for the subsequent study of phycobiliprotein. [Method] Amino acids composition,signal peptides,hydrophobicity/hydrophilicity and trails-membrane topological structure of α subunit gene of phycobiliprotein from Spirulina maxima which registered in GenBank （GenBank AF441177） were analyzed and predicted by the tools of bioinformatic analysis. Meanwhile,phylogenetic tree was constructed based on α subunit gene of phycobiliprotein from Spirulina maxima,and its molecular evolution was also analyzed. [Result] The phycobiliprotein was rich in amino acids,which not only contained 18 kinds of essential amino acids,but also contained some non-essential amino acids like glycine,aspartic acid,etc.; Analysis on signal peptides and trails-membrane topological structure showed that the phycobiliprotein belonged to intracellular protein; Analysis on hydrophobicity/hydrophilicity showed that the phycobiliprotein belonged to hydrophilic protein; Phylogenetic analysis showed that the phycobiliprotein had a high homology with Arthrospira,which reached 99%-100%. [Conclusion] The study provided a certain reference for the relationship and interaction between α subunit and β subunit.