鼠疫耶尔森菌菌株91001全基因组序列测定及初步分析  

Detection and analysis of complete genome sequence of Yersinia pestis human-avirulent strain 91001

作　　者：宋亚军[1] 童宗中[1] 王津[1] 郭兆彪[1] 汪莉[2] 韩延平[1] 张建国[3] 裴德翠[1] 周冬生[1] 秦海鸥[3] 庞昕[1] 韩玉军[3] 翟俊辉[1] 李敏[4] 祁芝珍[4] 金丽霞[4] 戴瑞霞[4] 崔百忠[4] 陈峰[3] 李胜霆[3] 叶辰[3] 杜宗敏[1] 王效义[1] 王俊[3] 于军[3] 杨焕明[3] 汪建[3] 黄培堂[2] 杨瑞馥[1] 

机构地区：[1]北京军事医学科学院微生物流行病研究所,100071 [2]军事医学科学院生物工程研究所 [3]中国科学院北京基因组研究所 [4]青海省地方病预防控制所

出　　处：《解放军医学杂志》2004年第3期192-199,共8页Medical Journal of Chinese People's Liberation Army

基　　金：国家"8 63"基金 (编号 2 0 0 1AA2 2 30 61 );国家自然科学基金 (编号30 371 2 84)资助课题

摘　　要：目的　测定对人不致病的鼠疫耶尔森菌布氏田鼠疫源地菌株 910 0 1的全基因组序列 ,并通过比较基因组学研究 ,探索鼠疫耶尔森菌致病性的遗传学机制和进化路线。方法　采用全基因组鸟枪法测定 910 0 1菌株的全基因组序列 ,利用比较基因组方法对 910 0 1与另外 2株鼠疫耶尔森菌(CO92和KIM)的全基因组进行比较研究。结果　910 0 1菌株的基因组包括 1条染色体和 4个质粒 (pPCP1、pCD1、pMT1和pCRY)。pPCP1质粒长度为 96 0 9bp,与参考菌株基本一致 ;pCD1质粒是编码Ⅲ型分泌系统的质粒 ,长度为70 15 9bp,编码情况与参考菌株基本相同 ,但重排导致了质粒的结构与参考菌株存在差异 ;pMT1质粒长度为10 6 6 4 2bp,保留了较多的原始质粒片段 ,毒力相关基因与参考菌株没有差异 ;pCRY质粒是本研究中新发现的质粒 ,在国内外研究中未曾报道 ,这一质粒长度为2 174 2bp ,具有独立复制能力 ,有一群编码Ⅳ型分泌系统的基因。 910 0 1菌株的染色体长度为4 5 95 0 6 5bp,有 4 0 37个编码序列 (CDS) ,其中 14 1个是假基因 ;染色体中存在着非常丰富的插入序列 ,由于存在IS序列介导的基因组重排 ,910 0 1菌株染色体的结构与参考菌株存在较大差异。通过比较基因组学分析 ,初步确定了910 0 1菌株甘油降解阳性、硝酸盐还原阴性、阿拉?Objective To better understand the pathogenicity and evolution of Yersinia pestis, we carried out the whole genome sequencing of human-avirulent Yersinia pestis strain 91001, which was isolated from a species of rodent-Microtus brandti. Methods We utilized “whole genome shotgun” approach to get the genome sequence of 91001. Based on the finished and annotated genome sequence of 91001, as well as the previously published genome sequences of CO92 and KIM, we performed detailed comparative genomics analysis on their chromosomes and plasmids. Results The genome of 91001 consisted of one chromosome and four plasmids (pPCP1, pCD1, pMT1 and pCRY). The pPCP1 plasmid of 9 609bp was almost identical with its counterparts from reference strains, which possessed 10 CDS. Plasmid pCD1 was found to be a plasmid of the type III secretory apparatus, and its length was 70 159bp. Although its CDS are quite similar to those of the reference plasmids, there were obvious rearrangements which produced certain differences in structure among them. Another plasmid was pMT1, a 106 642bp plasmid, which showed slightly different architecture compared with the reference ones. There was no mutation in virulent-related genes of pMT1 and pMT1 of 91001, which seemed to have retained more fragments of an ancestor plasmid. pCRY was a novel plasmid discovered in this work. It was 21 742bp long and harbored a group of gene encoding type IV secretory system. pCRY seemed to be able to replicate. The length of chromosome of 91001 was 4 595 065bp, and among its 4 037 predicted CDS (coding sequences), 141 were possibly pseudogenes. There were many IS in the chromosome. Due to the rearrangments mediated by IS, the structure of 91001 chromosome showed significant differences compared with CO92 and KIM. According to the results of comparative genomics analysis, we deduced the genetic mechanisms of nitrate reduction, glycerol fermentation, arabinose and milibiose utilization in 91001. Conclusion According to the analysis of plasmids structure, pseud

关 键 词：耶尔森氏菌 鼠疫 基因组 进化 序列分析 DNA 

分 类 号：R378.61[医药卫生—病原生物学]