鸡IL-18成熟蛋白基因变构体毕赤酵母表达载体的构建及表达

Chinese Journal of Veterinary Science(2009)

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Abstract
为使鸡IL-18成熟蛋白基因在真核系统中高效表达,对其进行定点突变,将酵母低频密码子突变为偏嗜性密码子,构建了鸡IL-18成熟蛋白变构基因真核重组表达载体pPICZαA-MChIL18*,并将其转化入P.pastorisX-33。重组菌株X-33/pPICZαA-MChIL18*经甲醇诱导后,表达产物的上清液经SDS-PAGE检测,结果在约23 000处有目的条带,与预期的相对分子质量一致,占总蛋白的45%,对其进行Western-blot检测,结果与兔抗鸡IL-18多克隆抗体发生特异性免疫反应。结果表明,鸡IL-18成熟蛋白变构基因在毕赤酵母中成功的进行了表达。
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Key words
western-blot,pichia pastoris expression system,site-directed mutagenesis,chicken interleukin-18,sds-page,sds page,mutants,interleukin 18,interleukins,gene expression,genes,mutagenesis
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