摘要
为了获得高效表达的人类免疫缺陷病毒（ＨＩＶ１）ｇｐ４１蛋白，从而为ＨＩＶ１基因工程诊断抗原的国产化打下基础，用ＰＣＲ的方法从ＨＩＶ１全基因序列中扩增出编码ｇｐ４１Ｎ端的６９０ｂｐ片段。经酶切后，克隆到ｐＥＴ２８ａ载体中，再将重组质粒转化到表达宿主菌ＢＬ２１（ＤＥ３）中，经ＩＰＴＧ诱导，高效表达出ｇｐ４１蛋白。间接ＥＬＩＳＡ、Ｗｅｓｔｅｒｎｂｌｏｔ、ＳＤＳＰＡＧＥ电泳证实，该表达产物具有良好的抗原性和特异性，且表达量约占总菌体蛋白的４５％。重组蛋白经金属鏊合纯化，纯度达９９％。
In order to get high level expression of HIV 1 gp41 gene, a fragment (690 bp) encoding N terminal of gp41 from all sequence of HIV 1 was amplified by PCR. After digesting by restriction enzyme EcoRI/Sal I, the fragment was cloned into pET28a plasmid which was digested by the same restriction enzyme, then recombinant plasmid was transformed into the E.coli BL21 (DE3). After inducing by IPTG, the bacteria produced the protein. Then the protein was purified through chelating Sepharose. Using indirect ELISA, SDS PAGE and Western blot test, it was found that the protein had good antigenicity, good specificity and high purification (99%), and its yield was about 45% of the total bacteria protein.
出处
《中国病毒学》
CSCD
1998年第4期340-344,共5页
Virologica Sinica
基金
卫生部资助
