热带假丝酵母脂肪酶在毕赤酵母中的表达及其条件优化

来源 :中国生物化学与分子生物学会2016年全国学术会议 | 被引量 : 0次 | 上传用户:quhongliangs
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  脂肪酶(EC3.1.1.3)普遍存在于自然界,被广泛运用于精细化工、洗涤、医药、食品、造纸、皮革加工、纺织和饲料工业等领域.一个经过密码子优化的热带假丝酵母脂肪酶基因在巴斯德毕赤酵母GS115中进行胞内表达,然后对筛选得到的重组菌株3-1进行表达条件优化.当培养基组成为酵母粉1%、玉米浆2%、蛋白胨1%、0.1mol/l磷酸钾缓冲液、YNB 1.34%、生物素 4×10-5%、甲醇3%,起始pH为7.0,装瓶量为20%,在32℃、180 r/min培养96 h,其中每24 h补加0.5%的甲醇进行诱导时,重组菌株3-1的脂肪酶得到最优表达.
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