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用于从稀酸木质纤维素水解物生产乙醇的菌株构建

Strain construction for ethanol production from dilute-acid lignocellulosic hydrolysate.

作者信息

Yan Fei, Bai Fali, Tian Shen, Zhang Jinxin, Zhang Zuoyang, Yang Xiushan

机构信息

College of Life Science, Capital Normal University, No 105 North Street of West Third Ring Road, Beijing, 100048, China.

出版信息

Appl Biochem Biotechnol. 2009 Jun;157(3):473-82. doi: 10.1007/s12010-008-8343-8. Epub 2008 Aug 28.

Abstract

In order to construct a strain that converts sugar mixture and resist/metabolize inhibitors in lignocellulosic dilute-acid hydrolysate, the biotechnology of inactive intergeneric fusion between Saccharomyces cerevisiae and Pachysolen tannophilis was performed. Fusant 1 was successfully obtained as a hybrid strain, which was screened out by xylose and mixed sugar (xylose and glucose) fermentation. This strain showed good abilities of ethanol production, ethanol tolerance, and resistance to the toxic inhibitors presenting in the hydrolysate. The maximum volumetric yield of ethanol and yield of xylitol in mixed sugar was 9.52 g/l and 0.44 g/g, respectively. The results indicated that the constructed strain Fusant 1 was a good producer for ethanol and xylitol from lignocellulosic dilute-acid hydrolysate.

摘要

为构建一种能转化糖混合物并抵抗/代谢木质纤维素稀酸水解液中抑制剂的菌株,开展了酿酒酵母和嗜鞣管囊酵母之间非活性属间融合的生物技术研究。融合子1作为杂交菌株成功获得,通过木糖和混合糖(木糖和葡萄糖)发酵筛选得到。该菌株在乙醇生产、乙醇耐受性以及对水解液中存在的有毒抑制剂的抗性方面表现出良好能力。混合糖中乙醇的最大体积产率和木糖醇产率分别为9.52 g/l和0.44 g/g。结果表明,构建的菌株融合子1是从木质纤维素稀酸水解液中生产乙醇和木糖醇的优良菌株。

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