生物技术通报 ›› 2016, Vol. 32 ›› Issue (4): 217-221.doi: 10.13560/j.cnki.biotech.bull.1985.2016.04.029

• 研究报告 • 上一篇    下一篇

一个融合魏斯氏菌隐蔽质粒的序列分析

王海娟1,戴雨珂2,苏森森1,王英3,潘渠1   

  1. 1. 成都医学院病原生物学教研室,成都 610500 ;
    2. 成都医学院公共卫生系,成都 610500 ;
    3. 成都军区总医院肾内科,成都 610500
  • 收稿日期:2015-08-13 出版日期:2016-04-25 发布日期:2016-04-26
  • 作者简介:王海娟,女,研究方向:病原生物与感染性疾病研究;E-mail:934147264@qq.com
  • 基金资助:
    国家自然科学基金项目(31170007),四川省教育厅科技基金重点项目(14ZA0219),成都医学院病原生物学学科建设项目(CYXK2012005)

Complete DNA Sequence Analysis of a Cryptic Plasmid Isolated from Weissella confusa

WANG Hai-juan1, DAI Yu-ke2, SU Sen-sen1, WANG Ying3, PAN Qu1   

  1. 1. Department of Pathogenic Biology,Chengdu Medical College,Chengdu 610500;
    2. School of Public Health,Chengdu Medical College,Chengdu 610500;
    3. Department of Kidney Disease,General Hospital of Chengdu Military Region,Chengdu 610500
  • Received:2015-08-13 Published:2016-04-25 Online:2016-04-26

摘要: 从融合魏斯氏菌(WeissellaconfusaQJ012)中发现一个隐蔽质粒(pQJ012),测序结果显示该质粒大小为1489bp,碱基G+C含量为42.8%。BLAST结果显示该质粒的核苷酸序列同pJY33和pKLCA的同源性分别为93%、92%。ORF1编码一个282个氨基酸残基的复制蛋白(Rep),其氨基酸序列与质粒pJY33和pKLCA的同源性分别为91%、85%。根据复制蛋白、dso和sso的序列特征,推定pQJ012的复制方式为滚环复制,是滚环复制pT181家族成员。质粒pQJ012可能构建为良好的表达载体。

关键词: 融合魏斯氏菌, 隐蔽质粒, 序列分析, 复制蛋白

Abstract: A cryptic plasmid isolated from Weissella confusa QJ012,designated as pQJ012,was sequenced and characterized,and it was a 1489 bp circular molecule with a 42.8% G+C content. The result of BLAST showed that nucleotide sequence of pQJ012 was in homology with pJY33(93%)and pKLCA(92%). ORF1 encoded a 282 amino acid residue Rep protein that was 91% identical to pJY33 and 85% identical to pKLCA in homology. Sequence analysis indicated that plasmid pQJ012 belonged to pT181 family of rolling-circle replication(RCR). The pQJ012 may be constructed as a promising expression vector.

Key words: Weissella confuse, cryptic plasmid, sequence analysis, replication protein