Objective To express the Vpu protein of human immunodeficiency virus type 1(HIV-1) in Pichia pastoris and purify the expressed product. Methods The vphu gene was amplified from plasmid p CDNA3. 1-vphu by PCR and inserted into expression vector p PICZαA. The constructed recombinant plasmid p PICZαA-vphu was transformed to wild type P. pastoris X33 strain and induced with methanol. The expressed 6 × His-tagged Vpu protein was purified by NiAgarose column chromatography. The expressed and purified proteins wer...
【基金】
国家自然科学基金(81202976);
北京市自然科学基金(7142013)
【更新日期】
2015-05-21
【分类号】
Q78
【正文快照】
Vpu蛋白是人类免疫缺陷病毒1型(human immu-nodeficiency virus type 1,HIV-1)特有的辅助调节蛋白,由Rev依赖的双顺反子m RNA编码,含有81个氨基酸,属于Ⅰ型跨膜蛋白,相对分子质量约为16 000。Vpu蛋白的N-末端为胞外区,第1~27位氨基酸上存在信号肽和疏水的膜锚定位点(membrane a