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Expression and purification of polyhistidine-tagged rotavirus NSP4 proteins in insect cells

机译:多组氨酸标记的轮状病毒NSP4蛋白在昆虫细胞中的表达和纯化

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摘要

The rotavirus nonstructural NSP4 protein, a transmembrane endoplasmic reticulum-specific glycoprotein, has been described as the first viral enterotoxin. Purified NSP4 or a peptide corresponding to NSP4 residues 114-135 induces diarrhea in young mice. NSP4 has a membrane-destabilizing activity and causes an increase in intracellular calcium levels and chloride secretion by a calcium-dependent signalling pathway in eucaryotic cells. In this study, four recombinant baculoviruses were generated expressing the rotavirus NSP4 glycoprotein from the human strains Wa and Ito, the porcine strain OSU, and the simian strain SA11, which belong to two different NSP4 genotypes, A and B. The recombinant glycoproteins, expressed as polyhistidine-tagged molecules, were analyzed by Western blotting and immunoprecipitation. Newborn mice responded with diarrhea after inoculation with each of the recombinant NSP4 proteins. (C) 2003 Elsevier Science (USA). All rights reserved. [References: 21]
机译:轮状病毒非结构性NSP4蛋白(一种跨膜内质网特异性糖蛋白)已被描述为第一种病毒肠毒素。纯化的NSP4或对应于NSP4残基114-135的肽可诱发幼鼠腹泻。 NSP4具有膜破坏活性,并通过真核细胞中的钙依赖性信号传导途径引起细胞内钙水平和氯化物分泌的增加。在这项研究中,产生了四种重组杆状病毒,它们表达了来自人类毒株Wa和Ito,猪毒OSU和猿猴株SA11的轮状病毒NSP4糖蛋白,它们分别属于两种不同的NSP4基因型A和B。通过蛋白质印迹和免疫沉淀分析了作为多组氨酸标签分子的蛋白。新生小鼠接种每种重组NSP4蛋白后,会出现腹泻。 (C)2003 Elsevier Science(美国)。版权所有。 [参考:21]

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