Biosynthesis of D-threitol from biomass-derived xylose by engineering Trichosporonoides oedocephalis.

IF 4 3区 生物学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Jingyi Xu, Yue Tang, Yuqi Peng, Zhi Chen, Xin Ju, Liangzhi Li
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Abstract

Xylose is the major pentose and the second most abundant sugar in the lignocellulosic feedstock. Metabolic engineering approaches have been employed to enhance the utilization rate of xylose in yeast. We previously modified Trichosporonoides oedocephalis ATCC 16958 and produced sugar alcohols, including xylitol and erythritol. D-threitol is a rare sugar that cannot be obtained directly from xylose conversion through fermentation. In this study, T. oedocephalis gained xylose assimilation activity by introducing ribulose-5-phosphate isomerase B from Ochrobactrum sp. and xylitol dehydrogenase from the yeast Scheffersomyces stipitis CBS 6054 for D-threitol production. Optimization of the composition of the medium ultimately led to an increase in the yield of D-threitol to 5.18 g/L. In addition, this study also analyzed the kinetics of the fermentation process, including cell growth, D-threitol biosynthesis and xylose consumption. Cell growth conformed to the logistics curve, and D-threitol synthesis and substrate consumption conformed to the Luedeking-Piret curve showing a growth-partially correlated type. This study demonstrated the potential of engineered yeast to synthesize high value-added products from biomass-derived xylose.

生物质木糖合成d -苏糖醇的工程研究。
木糖是主要的戊糖,是木质纤维素原料中含量第二丰富的糖。利用代谢工程方法提高酵母菌对木糖的利用率。我们先前修饰了三磷酸膦酸酯ATCC 16958,并生产了糖醇,包括木糖醇和赤藓糖醇。d -苏糖醇是一种罕见的糖,不能通过发酵直接从木糖转化中获得。在本研究中,T. oedocephalis通过引入Ochrobactrum sp.的5-磷酸核酮糖异构体酶B和Scheffersomyces stipitis的CBS 6054木糖醇脱氢酶来获得木糖同化活性,用于生产d -三糖醇。优化培养基的组成,最终使d -苏糖醇的产率提高到5.18 g/L。此外,本研究还分析了发酵过程的动力学,包括细胞生长、d -苏糖醇生物合成和木糖消耗。细胞生长符合物流曲线,d -苏糖醇合成和底物消耗符合Luedeking-Piret曲线,呈生长部分相关型。本研究证明了工程酵母从生物质木糖中合成高附加值产品的潜力。
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来源期刊
World journal of microbiology & biotechnology
World journal of microbiology & biotechnology 工程技术-生物工程与应用微生物
CiteScore
6.30
自引率
2.40%
发文量
257
审稿时长
2.5 months
期刊介绍: World Journal of Microbiology and Biotechnology publishes research papers and review articles on all aspects of Microbiology and Microbial Biotechnology. Since its foundation, the Journal has provided a forum for research work directed toward finding microbiological and biotechnological solutions to global problems. As many of these problems, including crop productivity, public health and waste management, have major impacts in the developing world, the Journal especially reports on advances for and from developing regions. Some topics are not within the scope of the Journal. Please do not submit your manuscript if it falls into one of the following categories: · Virology · Simple isolation of microbes from local sources · Simple descriptions of an environment or reports on a procedure · Veterinary, agricultural and clinical topics in which the main focus is not on a microorganism · Data reporting on host response to microbes · Optimization of a procedure · Description of the biological effects of not fully identified compounds or undefined extracts of natural origin · Data on not fully purified enzymes or procedures in which they are applied All articles published in the Journal are independently refereed.
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