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    • 18. 发明申请
    • ETHANOL PRODUCTION IN ENGINEERED YEAST
    • 工程YEAST中的乙醇生产
    • WO2015035214A1
    • 2015-03-12
    • PCT/US2014054358
    • 2014-09-05
    • MASSACHUSETTS INST OF TECHNOLGYWHITEHEAD BIOMEDICAL INST
    • LAM FELIXFINK GERALDSTEPHANOPOULOS GREGORY
    • C12P7/06
    • C12P7/10C07K14/39C12N15/81C12P7/04C12P7/16C12Y101/01001C12Y101/01021C12Y102/01005Y02E50/10Y02E50/16Y02E50/17
    • The present disclosure provides, in various aspects, engineered alcohol tolerant yeast and methods of producing high concentrations of ethanol. The present disclosure shows that the basis of general alcohol tolerance is the upkeep of the opposing potassium and proton electromotive membrane gradients. Potassium supplementation and acidity reduction of culture medium physically strengthen these gradients, significantly increasing ethanol production in very high sugar and high cell density conditions mimicking industrial fermentation. Ethanol production per viable cell remains unchanged, and the enhancement in total output derives solely from elevated viability. Tolerance to ethanol can be controlled genetically, for example, via modulation of the cognate potassium (K+) and proton (H+) pumps; the artificially facilitated/increased import of K+ and export of H+ confer characteristics on laboratory strains that match or exceed those of industrial strains.
    • 本公开在各个方面提供了工程醇耐受酵母和生产高浓度乙醇的方法。 本公开显示,一般酒精耐受性的基础是相对的钾和质子电动膜梯度的维持。 培养基的补钾和酸度降低,物理强化了这些梯度,显着增加了非常高的糖和模拟工业发酵的高细胞密度条件下的乙醇生产。 每个活细胞的乙醇产量保持不变,总产出的增加仅来自升高的生存力。 对乙醇的耐受性可以在遗传上进行控制,例如通过调节相关钾(K +)和质子(H +)泵; 人工促进/增加进口K +和出口H +赋予特征的实验室菌株匹配或超过工业菌株。