摘要
目的 体外表达伯氏疏螺旋体外膜蛋白C(OspC) ,以制备基因工程重组抗原用于莱姆病血清学诊断研究。方法 应用聚合酶链反应技术和基因重组技术,从2 个伯氏疏螺旋体中国分离株基因组DNA 中扩增得到OspC基因,分别克隆到表达载体LKB2 中,在大肠杆菌中进行表达。结果 以天然蛋白形式高效表达了OspC。扫描分析显示,表达的OspC 相对分子质量均在23 000 左右,表达量占菌体总蛋白的34 % ~50 % 。Western blot 试验证明,重组OspC 蛋白可与莱姆病患者血清发生特异性反应。结论 重组OspC
Objective In ordertoexpressoutersurface protein C(OspC) of Borrelia burgdorferiin vitro and make research on the serodiagnosis of Lime disease with recombinant protein . Methods OspC gene,amplified from two Chinese isolates of Borrelia burgdorferi, were cloned into an expression vector LKB2 respectively .Two expressed vectors BT OspCand BJ OspC were constructed and then expressedin E.coli.Results OspCproteins were expressed heavily in a nonfused form which weighted 23 000 and accounted for 34 % ~50 % oftotalbacterial protein . Western blot analysis showed thatthe expressed pro tein could bespecificallyrecognized bytheserafrom patients with Lyme disease.Conclusion Thesuccess fulexpression of recombinant OspCprotein makes a foundation for developing early diagnostic agents for Lyme disease.
出处
《中华传染病杂志》
CAS
CSCD
北大核心
1999年第4期250-252,共3页
Chinese Journal of Infectious Diseases
关键词
伯氏疏螺旋体
外膜蛋白
基因表达
大肠杆菌
PCR
Borrelia burgdorferi Outer membrane protein Gene expression Poly merase chain reaction