中国媒介生物学及控制杂志 ›› 2012, Vol. 23 ›› Issue (6): 503-505,511.

• 论著 • 上一篇    下一篇

鼠疫耶尔森菌基因组核糖体结合部位识别

王宇萌, 俞东征   

  1. 中国疾病预防控制中心传染病预防控制所鼠疫室, 传染病预防控制国家重点实验室, 北京 102206
  • 收稿日期:2012-04-29 出版日期:2012-12-20 发布日期:2012-12-20
  • 基金资助:
    国家科技重大专项课题(2008ZX10004-001); 卫生行业科研专项鼠疫流行病学新技术研究与应用(201202021)

Identification of ribosomal binding sites in Yersinia pestis genome

WANG Yu-meng, YU Dong-zheng   

  1. State Key Laboratory for Infectious Diseases Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
  • Received:2012-04-29 Online:2012-12-20 Published:2012-12-20
  • Supported by:
    Supported by the Major National Science and Technology Projects of China (No. 2011ZX10004-001) and Grant from the Ministry of Health of the People’s Republic of China (No. 201202021)

摘要: 目的 通过统计分析鼠疫耶尔森菌(鼠疫菌)CO92株中核糖体结合位点(RBS)与翻译起始位点的距离, 探索最适合翻译起始的RBS与起始位点的距离。方法 通过对鼠疫菌所有拷贝的16S rRNA 3′端, 及已经通过实验确定的177处RBS进行分析, 确定鼠疫菌RBS的序列特征。统计鼠疫菌CO92株中存在的所有RBS序列的位置和数量, 及RBS序列与翻译起始序列ATG(GTG, TTG, CTG)的距离。观察已经公布的CO92株的编码序列(CDS)片段前20个碱基序列的特征。结果 在CO92的全基因组序列中搜索, 共发现可能的RBS结构5081个, 2909个后面一段距离内存在开放读码框架, 其中1541与标注的CDS相符, 535与标注的CDS终止位点相同, 但起始位点不同。CO92序列中的3887 CDS前面20个碱基中, 57.7%含有RBS序列。结论 RBS序列与起始位点间隔7个碱基和8个碱基出现的次数最多;RBS可能作为基因识别的重要指征。

关键词: 核糖体结合位点, 翻译起始, 鼠疫耶尔森菌

Abstract: Objective To determine the optimal distance between ribosomal binding site (RBS) and translation initiation site (TIS) by statistical analysis of RBS-TIS distances in Yersinia pestis CO92. Methods All copies of 3′-terminal 16S rRNA and 177 annotated RBS sequences in CO92 were analyzed to identify the characteristics of Y. pestis RBS sequences. The positions and number of all RBS sequences in CO92 and their distances from the TIS ATG (GTG, TTG, CTG) were determined by statistical analysis. The characteristics of the 20 upstream bases in the annotated coding DNA sequences (CDSs) in CO92 were observed. Results A total of 5081 potential RBS sequences were found in CO92 genome. Of the 5081 RBS sequences, 2909 had downstream open reading frames (ORFs); of the 2909 RBS sequences, 1541 had the ORFs identical to the annotated CDSs, and 535 had the same termination sites as the annotated CDSs but had different initiation sites. In the 20 upstream bases of 3887 annotated CO92 CDSs, 57.7% contained RBS sequences. Conclusion The most frequent distances between RBS and TIS were 7 and 8 bases in CO92 genome. RBS can be an important gene index for identification.

Key words: Ribosomal binding site, Translation initiation, Yersinia pestis

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