高免疫原性骨桥蛋白的构建、表达及鉴定.pdf
文本预览下载声明
·480·
·论著·
高免疫原性骨桥蛋白的构建、表达及鉴定
汤伟松孟琴刘亮 李淑珍唐晓波
【摘要】 目的重组及表达高免疫原性骨桥蛋白(OPN)的融合蛋白。方法使用Lasergene软件
分析OPN基因,选取出免疫原性高的区域作为目的片段。提取总RNA,应用逆转录、PCR等技术扩增
OPN基因目的片段,将其分别与带有His标签的pET·32a及GST标签的pGEX-4T一1载体连接。构建表
达载体,诱导表达OPN融合蛋白(分别含有His,GST.Tag),并进行SDS—PAGE及Western
blotting鉴定。
结果扩增后获得一条351bp的DNA片段,经测序鉴定为目的片段序列,并实现了可溶性高表达,经
Western
blotting鉴定为高免疫原性OPN融合蛋白。结论’采用原核表达经纯化后可获得高纯度高免疫
原性的OPN融合蛋白,为进一步开发.OPN诊断试剂打下基础。
【关键词】骨桥蛋白;肝癌;高免疫原性区
Constructionand of fusion TANG
expressionhigh
immunogenicosteopontinproteins Wei—song,MENG
Shu—zhen,TANG of
Qin,LIULiang,LI Xiao·bo.DepartmentBiopharmaceuticalScience,CollegeofPharmacy,
HarbinMedical 15008
1,China
University,Harbin
author:TANG
Corresponding Xiao—bo,E—mail:ty6163@aliyun.eom.cfl
Tocloneand with
【Abstract】0bjeetiveexpressosteopontin(OPN)fusionproteinshJ【ghimmunogenic—
OPN was a wasselected
ity.Methodsgene analyzedusingLasergenesoftware,andhighimmunogenicregion
as ofthe wasclonedRT—PCRfromtotal
fragment.Thefragment RNA,The
target targetgene by amplifiedgene
wasinsertedintovectors and recombinantwereconstructedand
pET-32apGEX-4T一1.,11le plasmids expressed
and identifiedSDS—PAGEandWestern
proteins(includingHis-TagGST—Tag,respectively)wereby blotting.
ResultsADNAbandabout351 wasconfirmedas OPN DNA
ex—
bp target fragmentby sequencing.Soluble
was
of OPNfusion wa
显示全部