施氏假单胞菌四氢嘧啶/羟基四氢嘧啶合成基因簇进化分析  

Evolutionary Analysis of Ectoine / Hydroxyectoine Synthesize Gene Cluster in Pseudomonas stutzeri

作　　者：李向阳[1,2] 张国辉[1] 汤宏[1] 

机构地区：[1]凯里学院,贵州凯里556011 [2]复旦大学,上海杨浦200433

出　　处：《凯里学院学报》2015年第6期70-73,共4页Journal of Kaili University

基　　金：国家自然科学基金项目(编号:21507012);中国博士后科学基金面上项目(编号:2015M570329);凯里学院博士专项课题(编号:BS201412)

摘　　要：本文以9施氏假单胞菌完整基因组为材料,借助比较基因组学以及系统谱系进化树推导方法,分析了施氏假单胞菌生物四氢嘧啶/羟基四氢嘧啶合成基因簇(ectABCD-ask)的进化关系.结果表明ectABCD-ask基因簇在施氏假单胞菌种内具有很高的保守性,而且不存于其它假单胞菌菌株中,因此推测施氏假单胞菌获得ectABCD-ask基因簇是一个早期水平基因组转移事件,甚至可能作为区分于其它假单胞菌种的分类标记.Nine completed genomic sequences of Pseudomonas stutzeri were employed toanalysis the ev- olutionary of ectoine/hydroxyectoine synthesize gene cluster. By comparing the ectoine/hydroxyectoine gene cluster and its flanking sequences, and inferring the phylogenetic relationgships among these strains, the results indicated ectABCD - ask was remarkably conservative in P. stutzeri genomes but ab- sent from the other Pseudomonas species. Thus, the author speculated P. stutzeri may obtained ectAB- CD - ask through a very early event of horizontal gene transfer, more importantly, ectABCD - ask could be used as a potential classification labeling for discriminating itself from the other Pseudomonas species.

关 键 词：施氏假单胞菌 基因组比较 四氢嘧啶/羟基四氢嘧啶基因簇 系统发育树 

分 类 号：Q933[生物学—微生物学]