浙江农业学报

• 作物科学 • 上一篇    下一篇

SgP5CS基因克隆和生物信息学分析

  

  1. (1. 浙江省农业科学院 作物与核技术利用研究所,浙江 杭州 310021;2. 萧山区种子管理站,浙江 杭州 311201)
  • 出版日期:2016-03-25 发布日期:2016-04-07

Molecular cloning and bioinformatics analysis of SgP5CS gene in Suaeda glauca

  1. (1. Institute of Crops and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Science, Hangzhou 310021, China;2. Seed Management Station of Xiaoshan District, Hangzhou 311201, China)
  • Online:2016-03-25 Published:2016-04-07

摘要: 利用同源克隆的方法,获得了碱蓬P5CS基因全长ORF,命名为SgP5CS。SgP5CS ORF全长2 151 bp,生物信息学软件预测其编码716个氨基酸组成的多肽,相对分子量为77 431.8 u, 等电点为5.71,为稳定的亲水性蛋白,无跨膜结构域。ClustalX多重序列比对发现SgP5CS编码的氨基酸序列与盐角草P5CS相似性为93%,与盐角草P5CS的亲缘关系最近,其次是甜菜。脯氨酸是生物体内重要的渗透调节剂,而Δ1吡咯啉5羧酸合成酶则是植物合成脯氨酸的关键酶之一,SgP5CS的克隆将为进一步的功能分析鉴定基础。

关键词: 碱蓬, P5CS, 脯氨酸

Abstract: A new gene, named as SgP5CS, was cloned by homologous cloning method from Suaeda glauca. Bioinformatics analysis showed that the open reading frame of SgP5CS gene was 2 151 bp, encoding 716 amino acids. The isoelectric point and the relative molecular weight of coded protein were 5.71 and 77.4318 u, respectively. Hydrophobic analysis indicated that SgP5CS was a hydrophilic protein and had no transmembrane domain. Nucleotide sequence Blast by ClustalX indicated that the coded protein of SgP5CS shared an identity of 93% with P5CS of Salicornia europaea. Δ1pyrroline5carboxylate synthetase (P5CS) is a key enzyme in the synthesis of proline which is one of the important osmotic regulators in plants. Our research laid a foundation to further study the P5CS function in Suaeda glauca.

Key words: Suaeda glauca, P5CS, proline