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玉米全基因组谷胱苷肽-S-转移酶基因家族的分析
李晓玉,江海波,江海洋,朱苏文
0
(安徽农业大学生命科学学院,安徽省作物生物学重点实验室)
摘要:
谷胱苷肽转移酶(glutathione-S-transferase,GST)是植物生长发育过程中一类多功能酶,在植物的初级代谢和次级代谢以及调控植物的逆境胁迫和细胞信号转导等过程中具有重要作用。根据GST蛋白序列构建的隐马尔可夫模型(hidden markov model, HMM),鉴定玉米全基因组GST基因,并对GST基因数量、类型、染色体定位和进化关系进行分析。结果表明,玉米全基因组中共含有37个GST基因,在10条染色体上呈非随机分布,具有U型、F型和Z型3个亚族。 与水稻比较, 玉米未发现T亚族。该研究结果对深入了解GST基因家族的分子进化以及GST基因的克隆和功能验证提供了重要参考依据。
关键词:  玉米  谷胱苷肽转移酶  染色体定位  进化
DOI:
基金项目:国家自然科学基金(31201217) 和安徽省教育厅基金重点项目(KJ2012A105)
Genome-wide analysis of glutathione-S-transferase gene family in maize
LI Xiao-yu,JIANG Hai-bo,JIANG Hai-yang,ZHU Su-wen
(Kay Laboratory of Crop Biology of Anhui Province, School of Life Science, Anhui AgriculturalUniversity)
Abstract:
Glutathione-S-transferase (GST) is multifunctional enzymes in the process of plant growth and development. GSTs have important functions in plant primary metabolism, secondary metabolism, stress response and cell signal transduction. In this study, a HMM (hidden markov model) was built based on GST protein sequence. By HMM Blast analysis, a complete set of GST genes were identified from the maize genome, and characterized for their gene number, type, chromosomal location and evolutionary relationships. The result showed that the maize genome contains 37 GST genes. Chromosomal location of these genes revealed that they are distributed unevenly across all 10 chromosomes.Evolutionary relationship analysis showed that 37 GST genes can be further divided into U, F and Z types. This study helps us to further understanding the molecular evolution of the GST genefamily. Moreover, the also provide an important reference for cloning and function verification of maize GST genes.
Key words:  maize  glutathione-S-transferase  chromosomal location  evolution

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