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首页> 外文期刊>Journal of the Japan Petroleum Institute >Effect of Low-concentration Furfural on Sulfur Amino Acid Biosynthesis in Saccharomyces cerevisiae
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Effect of Low-concentration Furfural on Sulfur Amino Acid Biosynthesis in Saccharomyces cerevisiae

机译：低浓度糠醛对酿酒酵母中硫氨基酸生物合成的影响

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摘要

Ethanol produced from lignocellulosic biomass (bioethanol) is a promising alternative fuel to gasoline. Production of bioethanol from lignocellulose requires various steps, including pretreatment, enzymatic hydrolysis and fermentation. However, many fermentation inhibitors, including furfural and 5-hydroxymethyl furfural, are generated during the hydrothermal pretreatment of lignocellulose. Recent studies have identified techniques for removing fermentation inhibitors from lignocellulosic hydrolysate. The present study focused on the effect of low-concentration furfural on ethanol production by Saccharomyces cerevisiae. Specifically, gene expression of furfural-inducible genes was analyzed using a S. cerevisiae DNA microarray. The expression of most sulfur amino acid biosynthesis genes increased in response to furfural. To determine whether furfural induces the depletion of sulfur-containing amino acids, the effect of the addition of methionine on yeast growth was investigated. However, exogenous addition of methionine did not compensate for the inhibitory effect. The findings of this study show that furfural affects amino acid synthesis, even at low concentrations, and may be important in the development of high-efficiency processes for large-scale bioethanol production from lignocellulosic biomass.
机译：由木质纤维素生物质（生物乙醇）生产的乙醇是一种有前途的汽油替代燃料。由木质纤维素生产生物乙醇需要各种步骤，包括预处理，酶促水解和发酵。然而，在木质纤维素的水热预处理期间产生了许多发酵抑制剂，包括糠醛和5-羟甲基糠醛。最近的研究已经确定了从木质纤维素水解物中去除发酵抑制剂的技术。本研究集中于低浓度糠醛对酿酒酵母乙醇生产的影响。具体而言，使用酿酒酵母DNA微阵列分析了糠醛诱导基因的基因表达。大多数硫氨基酸生物合成基因的表达增加响应糠醛。为了确定糠醛是否诱导了含硫氨基酸的消耗，研究了添加蛋氨酸对酵母生长的影响。但是，外源添加蛋氨酸不能补偿抑制作用。这项研究的结果表明，即使在低浓度下，糠醛也会影响氨基酸的合成，并且在开发从木质纤维素生物质大规模生产生物乙醇的高效过程中可能很重要。

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