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猪流行性腹泻病毒S1基因在毕赤酵母中的表达

China Animal Husbandry & Veterinary Medicine(2014)

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Abstract
为了研制一种能够高效表达猪流行性腹泻病毒S1主要抗原表位基因的新型疫苗,将S1主要抗原表位基因整合到酵母表达载体pPICZαC中,构建了重组质粒pPICZαC-S1,对重组质粒经Sac Ⅰ酶切线性化后通过电转化法转化到毕赤酵母X-33中,经ZeocinTM抗性筛选后得到阳性转化子(pPICZαC-S1),转化子接种培养基后用甲醇进行诱导,并对诱导结果进行SDS-PAGE分析和Western blotting鉴定.结果表明,纤突蛋白主要抗原表位在毕赤酵母中成功分泌表达,表达的蛋白分子质量为42 ku,且能够与PEDV阳性血清特异性结合.
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Key words
Pichia pastoris,antigenic epitope,porcine epizootic diarrhea virus (PEDV),secreted expression
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