摘要
目的 分析鉴定日本血吸虫未成熟卵可溶性抗原 (SIEA) 2 8k Da抗原组分。方法 用高效液相离子交换法对电泳纯 SIEA2 8k Da抗原组分进一步分离纯化 ,对获得的色谱纯 SIEA2 8k Da抗原组分进行二维凝胶电泳分析。结果 SIEA经双向凝胶电泳分离、银染后获得的 SIEA- 2 D图谱蛋白斑点以 p I3~ 7和 Mw14~ 6 6 k Da范围最多。进一步经图象采集、PDQuest2 D软件分析 SIEA双向电泳图谱 ,计算在相同的设定值条件下获取的蛋白质斑点数 ,测得 SIEA- 2 D电泳图谱平均为 (94 8±89)个蛋白质斑点数。电泳纯 SIEA2 8k Da抗原组分用高效液相离子交换法纯化后 ,2 80、2 2 0 nm波长色谱图均为一个两侧对称、光滑的高峰曲线 ,色谱洗脱液对其活性光密度图也为一个两侧对称、光滑的高峰曲线。二维凝胶电泳银染色可见一个显色饱和度高的蛋白质圆斑 ,免疫印迹分析为一个显色饱和度高的单一圆斑。结论 色谱纯 SIEA2 8k Da抗原组分为单一分子 ,其等电点为 5 .
Objective To analyze and identify 28 kDa molecule from the soluble immature egg antigen (SIEA) of Schistosoma japonicum. Methods The SIEA28kDa antigen component purified by chromatography was identified further by two-dimensional gel electrophoresis technique. It was separated in the first dimension on a narrow range by immobilized pH (4—7) gradient and then recognized by mono-specific sera against SIEA28kDa component. Results The SIEA28kDa antigenic molecule displayed a symmetric smooth chromatography curve with a single peak both at 210 nm and 280 nm wavelength. Its isoelectric point was about 5.7. Only one protein spot was observed onsilver stained 2D-gel and Western blot.Conclusion SIEA28kDa component purified by chromatog-raphy was demonstrated as a protein with a pI of 5.7.
出处
《中国血吸虫病防治杂志》
CAS
CSCD
2004年第1期8-12,共5页
Chinese Journal of Schistosomiasis Control
基金
国家"十.五"重大专项课题 (No.2 0 0 2 AA2 Z3 3 43 )
国家自然科学基金 (No.3 9870 65 2 )
湖南省重大专项课题 (No.0 2 SSY10 0 3 -1)
湖南省重点学科建设项目资助 (No.2 0 0 3 -985 -3 -7)~~