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酿酒酵母菌共表达XYLA和XKS1发酵木糖生产酒精 被引量:5

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摘要 分别从腾冲嗜热菌(Thermoanaerobacter tengcongensis MB4T)和毕赤酵母(Pichia stipitis)中克隆到木糖异构酶基因(xylose isomerase gene,XYLA)和木酮糖激酶基因(xylulokinase gene,XKS1).共表达这2个基因的重组菌EF1014不仅可以在以木糖为惟一碳源的培养基上生长,而且在厌氧条件下能发酵木糖生产酒精.在不同温度下用不同浓度的木糖分别进行的发酵实验表明,当木糖浓度为50g/L时,酒精的产量达到最大值0.11g/g木糖.与此同时,28.4%的木糖被利用,并产生1.54g/L的木糖醇.当发酵温度从30℃提高到37℃时,酒精产量没有明显变化.
出处 《科学通报》 EI CAS CSCD 北大核心 2005年第7期653-658,共6页 Chinese Science Bulletin
基金 国家重点基础研究发展计划(批准号:2004CB719002) 中国科学院知识创新工程的资助项目.
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参考文献27

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