生物技术通报 ›› 2015, Vol. 31 ›› Issue (7): 207-213.doi: 10.13560/j.cnki.biotech.bull.1985.2015.07.032

• 研究报告 • 上一篇    下一篇

铜绿假单胞菌外膜蛋白I的原核表达、纯化及免疫保护作用研究

陈春琳1, 刘祥1, 王成祥2, 张晓娟1, 俱雄1, 张涛1, 吴三桥1   

  1. (1.陕西理工学院生物科学与工程学院,汉中 723001;2. 安徽省肥西县特殊教育学校,合肥 231200)
  • 收稿日期:2014-11-18 出版日期:2015-07-16 发布日期:2015-07-16
  • 作者简介:陈春琳,女,硕士研究生,研究方向:分子生物学;E-mail:chen2362505579@163.com
  • 基金资助:
    陕西省教育厅科学研究计划(14JK1152),陕西理工学院人才启动项目(SLGQD13-15)

Expression, Purification and Immunoprotection Potential of Pseudomonas aeruginosa Outer Membrane Lipoprotein I

Chen Chunlin1, Liu Xiang1, Wang Chengxiang2, Zhang Xiaojuan1, Ju Xiong1, Zhang Tao1, Wu Sanqiao1   

  1. (1. College of Biological Sciences and Engineering,Shaanxi University of Technology,Hanzhong 723001;2. Special Education School in Feixi County of Anhui Province,Hefei 231200)
  • Received:2014-11-18 Published:2015-07-16 Online:2015-07-16

摘要: 铜绿假单胞菌外膜蛋白OprI具有较强的免疫原性,在疫苗上具有开发前景。利用分子方法获得OprI蛋白的表达菌株。Western blotting 验证表明抗体能与OprI蛋白特异性结合。SDS-PAGE电泳切胶纯化获得OprI蛋白。将OprI蛋白免疫小鼠并攻毒铜绿假单胞菌,发现OprI蛋白激活的特异性免疫对小鼠铜绿假单胞菌感染的保护率达到57.14%,与对照组相比较达到显著性。采用正交试验设计,获得OprI菌株最佳诱导表达条件为:加IPTG菌夜OD600值0.8,加IPTG终浓度 0.3 mmol/L,诱导时间 8 h,诱导温度 28℃;菌株最佳培养条件为转速230 r/min,葡萄糖浓度0%,装液量50 mL。

关键词: 铜绿假单胞菌, OprI蛋白, 免疫保护, 正交试验, 诱导条件

Abstract: Outer membrane lipoprotein I(OprI)in Pseudomonas aeruginosa has solid immunogenicity and holds prospects in the development of vaccine. The OprI-expressing strain was obtained by molecular cloning. Western blotting verified that antibody specifically combined with OprI. The purified OprI was gained by the SDS-PAGE gel slices. Immunizing mice with OprI, specific immunity activated by OprI protected 57. 14% mice from P. aeruginosa infection, which reached significant protection compared with the control group. The orthogonal experiment was employed to obtain the optimal inducing expressing condition of OprI strain:strain OD600 value,IPTG final concentration,inducing time and temperature,were 0. 8,0. 3 mmol/L,8 h,and 28℃,respectively;the optimal culture condition was that the rotation rate,glucose concentration,and medium volume were 230 r/min,0% and 50 mL,respectively. This work laid the groundwork for the researches on industrial fermentation,protein function and vaccine development of OprI.

Key words: Pseudomonas aeruginosa, OprI protein, immunoprotection, orthogonal experiment, induction conditions