【摘 要】
：
以毕赤酵母人β干扰素表达体系为研究对象,考察与蛋白酶活性相关的营养和环境因素对外源蛋白hIFNβ-HAS表达/降解的影响.结果表明,pH、谷氨酸和EDTA是显著影响hIFNβ-HAS表达
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以毕赤酵母人β干扰素表达体系为研究对象,考察与蛋白酶活性相关的营养和环境因素对外源蛋白hIFNβ-HAS表达/降解的影响.结果表明,pH、谷氨酸和EDTA是显著影响hIFNβ-HAS表达的3个因素.通过响应面分析得到hIFNβ-HAS表达的最优条件为pH 5.5、谷氨酸0.18％、EDTA 12 mmol/L,目的蛋白表达量为24.46 mg/L.发酵终产物的电泳结果表明:条件优化后,hIFNβ-HSA降解带明显变淡,说明营养和环境因素的优化一定程度上抑制了蛋白酶的活性,由此增加了目的蛋白的积累.
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