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高产碱性蛋白酶低温菌的筛选及发酵

Food Science and Technology(2012)

Cited 23|Views22
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Abstract
从123株南极低温细菌中筛选到1株高产低温蛋白酶的菌株,16S rDNA系统发育分析鉴定为Pseudoalteromonas。经生长条件优化,羧甲基纤维素钠和蛋白胨分别为发酵培养的最适碳源和氮源,该菌在初始pH7.0~8.0、10℃培养5d后产酶酶活达0.48U/mL,约为优化前(0.27U/mL)的1.8倍。对粗酶液进行酶学性质初步研究,此酶在pH9.0、30℃下活性最高,是一种低温碱性蛋白酶,在工业领域有很大的应用潜力。
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Key words
screening,enzymatic properties,antarctic bacteria,ferment,alkaline protease
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