不同信号肽对重组B群脑膜炎奈瑟菌H因子结合蛋白表达的影响

Chinese Journal of Biologicals(2017)

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Abstract
目的 探讨不同信号肽对重组B群脑膜炎奈瑟菌H因子结合蛋白(factor H-binding protein,fHBP)表达的影响.方法 运用PCR方法将B群脑膜炎奈瑟菌fHBP原始信号肽分别替换为大肠埃希菌主要外膜脂蛋白(major outer membrane lipoprotein,MLP)、脂蛋白-28(lipoprotein-28,LP)和流感嗜血杆菌(Haemophilus influenzae)P4外膜蛋白信号肽,并将其分别连接至pET-30a表达载体,转化入大肠埃希菌感受态细胞,IPTG诱导表达,SDS-PAGE鉴定蛋白表达水平.结果 替换了P4、LP和MLP信号肽的重组B群脑膜炎奈瑟菌fHBP表达量较带原始信号肽的B群脑膜炎奈瑟菌fHBP相比,分别提高了2.68、1.94和2.91倍.结论 替换MLP信号肽对重组B群脑膜炎奈瑟菌fHBP蛋白表达的影响最大,为提高B群脑膜炎奈瑟菌fHBP表达量的研究工作提供了新思路.
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Key words
Serogroup B Neisseria meningitidis,Factor H-binding protein(fHBP),Signal peptide,Prokaryotic expression
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