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Li M, Ni Z, Li Z, Yin Y, Liu J, Wu D, Sun Z, Wang L. Research progress on biosynthesis of erythritol and multi-dimensional optimization of production strategies. World J Microbiol Biotechnol 2024; 40:240. [PMID: 38867081 DOI: 10.1007/s11274-024-04043-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Accepted: 05/29/2024] [Indexed: 06/14/2024]
Abstract
Erythritol, as a new type of natural sweetener, has been widely used in food, medical, cosmetics, pharmaceutical and other fields due to its unique physical and chemical properties and physiological functions. In recent years, with the continuous development of strategies such as synthetic biology, metabolic engineering, omics-based systems biology and high-throughput screening technology, people's understanding of the erythritol biosynthesis pathway has gradually deepened, and microbial cell factories with independent modification capabilities have been successfully constructed. In this review, the cheap feedstocks for erythritol synthesis are introduced in detail, the environmental factors affecting the synthesis of erythritol and its regulatory mechanism are described, and the tools and strategies of metabolic engineering involved in erythritol synthesis are summarized. In addition, the study of erythritol derivatives is helpful in expanding its application field. Finally, the challenges that hinder the effective production of erythritol are discussed, which lay a foundation for the green, efficient and sustainable production of erythritol in the future and breaking through the bottleneck of production.
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Affiliation(s)
- Meng Li
- School of Biological Engineering, National Engineering Research Center of Wheat and Corn Further Processing, Henan University of Technology, Zhengzhou, 450001, China
| | - Zifu Ni
- School of Biological Engineering, National Engineering Research Center of Wheat and Corn Further Processing, Henan University of Technology, Zhengzhou, 450001, China.
| | - Zhongzeng Li
- School of Biological Engineering, National Engineering Research Center of Wheat and Corn Further Processing, Henan University of Technology, Zhengzhou, 450001, China
| | - Yanli Yin
- School of Biological Engineering, National Engineering Research Center of Wheat and Corn Further Processing, Henan University of Technology, Zhengzhou, 450001, China
| | - Jianguang Liu
- School of Biological Engineering, National Engineering Research Center of Wheat and Corn Further Processing, Henan University of Technology, Zhengzhou, 450001, China
| | - Dapeng Wu
- School of Environment, Henan Normal University, Xinxiang, 453001, China
| | - Zhongke Sun
- School of Biological Engineering, National Engineering Research Center of Wheat and Corn Further Processing, Henan University of Technology, Zhengzhou, 450001, China
| | - Le Wang
- School of Biological Engineering, National Engineering Research Center of Wheat and Corn Further Processing, Henan University of Technology, Zhengzhou, 450001, China.
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Rzechonek DA, Szczepańczyk M, Borodina I, Neuvéglise C, Mirończuk AM. Transcriptome analysis reveals multiple targets of erythritol-related transcription factor EUF1 in unconventional yeast Yarrowia Lipolytica. Microb Cell Fact 2024; 23:77. [PMID: 38475794 DOI: 10.1186/s12934-024-02354-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 03/01/2024] [Indexed: 03/14/2024] Open
Abstract
BACKGROUND Erythritol is a four-carbon polyol with an unclear role in metabolism of some unconventional yeasts. Its production has been linked to the osmotic stress response, but the mechanism of stress protection remains unclear. Additionally, erythritol can be used as a carbon source. In the yeast Yarrowia lipolytica, its assimilation is activated by the transcription factor Euf1. The study investigates whether this factor can link erythritol to other processes in the cell. RESULTS The research was performed on two closely related strains of Y. lipolytica: MK1 and K1, where strain K1 has no functional Euf1. Cultures were carried out in erythritol-containing and erythritol-free media. Transcriptome analysis revealed the effect of Euf1 on the regulation of more than 150 genes. Some of these could be easily connected with different aspects of erythritol assimilation, such as: utilization pathway, a new potential isoform of transketolase, or polyol transporters. However, many of the upregulated genes have never been linked to metabolism of erythritol. The most prominent examples are the degradation pathway of branched-chain amino acids and the glyoxylate cycle. The high transcription of genes affected by Euf1 is still dependent on the erythritol concentration in the medium. Moreover, almost all up-regulated genes have an ATGCA motif in the promoter sequence. CONCLUSIONS These findings may be particularly relevant given the increasing use of erythritol-induced promoters in genetic engineering of Y. lipolytica. Moreover, use of this yeast in biotechnological processes often takes place under osmotic stress conditions. Erythritol might be produce as a by-product, thus better understanding of its influence on cell metabolism could facilitate processes optimization.
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Affiliation(s)
- D A Rzechonek
- Laboratory for Biosustainability, Institute of Environmental Biology, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
- Department of Life Sciences (LIFE), Chalmers University of Technology, Göteborg, Sweden
| | - M Szczepańczyk
- Laboratory for Biosustainability, Institute of Environmental Biology, Wrocław University of Environmental and Life Sciences, Wrocław, Poland
| | - I Borodina
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - C Neuvéglise
- INRAE, Institut Agro, SPO, University Montpellier, Montpellier, France
| | - A M Mirończuk
- Laboratory for Biosustainability, Institute of Environmental Biology, Wrocław University of Environmental and Life Sciences, Wrocław, Poland.
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Su J, Li M, Yang H, Shu H, Yu K, Cao H, Xu G, Wang M, Zhu Y, Zhu Y, Ma C, Shao J. Enrichment of grape berries and tomato fruit with health-promoting tartaric acid by expression of the Vitis vinifera transketolase VvTK2 gene. Int J Biol Macromol 2024; 257:128734. [PMID: 38086429 DOI: 10.1016/j.ijbiomac.2023.128734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/07/2023] [Accepted: 12/08/2023] [Indexed: 01/27/2024]
Abstract
Tartaric acid (TA) is a major non-fermentable plant soluble acid that abundantly occur in grapes and wines, imparting low pH and tart flavour to berries thereby regulating numerous quality attributes of wine, such as flavour, microbial stability, and aging potential. Evaluation of acidity in mature fruits of 21 wine grape (Vitis vinifera) varieties revealed significant variation between 'Beichun' and 'Gewürztraminer', which was correlated with TA content. RNA-seq analysis of fruits from the two cultivars at different developmental stages revealed that a transketolase gene, VvTK2, was significantly dominantly expressed in the high TA phenotype 'Beichun' variety. Subcellular localization assay showed that VvTK2 protein was located in the chloroplast. Virus-induced VvTK2 gene silencing significantly decreased the expression of 2-keto-L-gulonic acid reductase (Vv2-KGR) as well as L-idonate dehydrogenase (VvL-IdnDH3) and inhibited TA accumulation, while its transient over-expression in grape showed the opposite results. Heterologous VvTK2 over-expression in tomato demonstrated its obvious capacity to induce TA synthesis. Overall, these results highlights a novel role of VvTK2 in modulating TA biosynthesis, which could be an excellent strategy for future genetic improvement of grape flavour.
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Affiliation(s)
- Jing Su
- College of Landscape and Horticulture, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Menghan Li
- College of Landscape and Horticulture, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Huanqi Yang
- College of Landscape and Horticulture, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Helin Shu
- College of Landscape and Horticulture, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Kunmiao Yu
- College of Landscape and Horticulture, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Huiling Cao
- College of Landscape and Horticulture, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Gezhe Xu
- College of Landscape and Horticulture, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Minghui Wang
- College of Landscape and Horticulture, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Yifan Zhu
- College of Plant protection, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Yingan Zhu
- College of Landscape and Horticulture, Yunnan Agricultural University, Kunming 650201, Yunnan, China
| | - Chunhua Ma
- College of Landscape and Horticulture, Yunnan Agricultural University, Kunming 650201, Yunnan, China.
| | - Jianhui Shao
- College of Plant protection, Yunnan Agricultural University, Kunming 650201, Yunnan, China.
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Wang Y, Zhu X, Wang J, Shen C, Wang W. Identification of Mycoparasitism-Related Genes against the Phytopathogen Botrytis cinerea via Transcriptome Analysis of Trichoderma harzianum T4. J Fungi (Basel) 2023; 9:jof9030324. [PMID: 36983492 PMCID: PMC10055783 DOI: 10.3390/jof9030324] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/15/2023] [Accepted: 02/28/2023] [Indexed: 03/08/2023] Open
Abstract
Trichoderma harzianum is a well-known biological control agent (BCA) that is effective against a variety of plant pathogens. In previous studies, we found that T. harzianum T4 could effectively control the gray mold in tomatoes caused by Botrytis cinerea. However, the research on its biocontrol mechanism is not comprehensive, particularly regarding the mechanism of mycoparasitism. In this study, in order to further investigate the mycoparasitism mechanism of T. harzianum T4, transcriptomic sequencing and real-time fluorescence quantitative PCR (RT-qPCR) were used to identify the differentially expressed genes (DEGs) of T. harzianum T4 at 12, 24, 48 and 72 h of growth in the cell wall of B. cinerea (BCCW) or a sucrose medium. A total of 2871 DEGs and 2148 novel genes were detected using transcriptome sequencing. Through GO and KEGG enrichment analysis, we identified genes associated with mycoparasitism at specific time periods, such as encoding kinases, signal transduction proteins, carbohydrate active enzymes, hydrolytic enzymes, transporters, antioxidant enzymes, secondary metabolite synthesis, resistance proteins, detoxification genes and genes associated with extended hyphal longevity. To validate the transcriptome data, RT-qCPR was performed on the transcriptome samples. The RT-qPCR results show that the expression trend of the genes was consistent with the RNA-Seq data. In order to validate the screened genes associated with mycoparasitism, we performed a dual-culture antagonism test on T. harzianum and B. cinerea. The results of the dual-culture RT-qPCR showed that 15 of the 24 genes were upregulated during and after contact between T. harzianum T4 and B. cinerea (the same as BCCW), which further confirmed that these genes were involved in the mycoparasitism of T. harzianum T4. In conclusion, the transcriptome data provided in this study will not only improve the annotation information of gene models in T. harzianum T4 genome, but also provide important transcriptome information regarding the process of mycoparasitism at specific time periods, which can help us to further understand the mechanism of mycoparasitism, thus providing a potential molecular target for T. harzianum T4 as a biological control agent.
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Affiliation(s)
- Yaping Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xiaochong Zhu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Jian Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Chao Shen
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Wei Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
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Kato M, Iwakoshi-Ukena E, Narimatsu Y, Furumitsu M, Ukena K. Effect of Stressors on the mRNA Expressions of Neurosecretory Protein GL and Neurosecretory Protein GM in Chicks. Front Physiol 2022; 13:860912. [PMID: 35370775 PMCID: PMC8964992 DOI: 10.3389/fphys.2022.860912] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 02/24/2022] [Indexed: 11/13/2022] Open
Abstract
We recently discovered novel cDNAs encoding the precursors of two small secretory proteins, neurosecretory protein GL (NPGL) and neurosecretory protein GM (NPGM), in the mediobasal hypothalamus (MBH) of chickens. In addition, we found colocalization of NPGL, NPGM, and histidine decarboxylase (HDC; histamine-producing enzyme) in same neurons of the medial mammillary nucleus of the hypothalamus. In this study, we elucidated the effect of several stresses, including food deprivation, environmental heat, inflammation, and social isolation, on the mRNA expression of NPGL, NPGM, and HDC in chicks using real-time PCR. Food deprivation for 24 h increased NPGM mRNA expression in the MBH. On the other hand, an environmental temperature of 37°C for 24 h did not affect their mRNA expression. Six hours after intraperitoneal injection of lipopolysaccharide, an inducer of inflammation, the mRNA expression of NPGM, but not that of NPGL and HDC increased. Social isolation for 3 h induced an increase in the mRNA expression of NPGL, NPGM, and HDC. These results indicate that NPGM, but not NPGL or HDC, may participate in several physiological responses to stress in chicks.
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Gu M, Liu L, Nakagawa Y, Li C, Tamura M, Shen Z, Zhou X, Zhang Y, Tomishige K. Selective Hydrogenolysis of Erythritol over Ir-ReO x /Rutile-TiO 2 Catalyst. CHEMSUSCHEM 2021; 14:642-654. [PMID: 33084243 DOI: 10.1002/cssc.202002357] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 10/20/2020] [Indexed: 06/11/2023]
Abstract
Partial hydrogenolysis of erythritol, which can be produced at large scale by fermentation, to 1,4-butanediol (1,4-BuD) is investigated with Ir-ReOx /SiO2 and Ir-ReOx /rutile-TiO2 catalysts. In addition to the higher conversion rate over Ir-ReOx /TiO2 than over Ir-ReOx /SiO2 , which has been also reported for glycerol hydrogenolysis, Ir-ReOx /TiO2 showed higher selectivity to 1,4-BuD than Ir-ReOx /SiO2 , especially at low conversion levels, leading to high 1,4-BuD productivity of 20 mmol1,4-BuD gIr -1 h-1 at 373 K (36 % conversion, 33 % selectivity). The productivity based on the noble metal amount is higher than those reported previously, although the maximum yield of 1,4-BuD (23 %) is not higher than the highest reported values. The reactions of various triols, diols and mono-ols are tested and the selectivity and the reaction rates are compared between catalysts and between substrates. The Ir-ReOx /TiO2 catalyst showed about twofold higher activity than Ir-ReOx /SiO2 in hydrogenolysis of the C-OH bond at the 2- or 3-positions in 1,2- and 1,3-diols, respectively, whereas the hydrogenolysis of C-OH at the 1-position is less promoted by the TiO2 support. Lowering the loading amount of Ir on TiO2 (from 4 wt % to 2 or 1 wt %) decreases the Ir-based activity and 1,4-BuD selectivity. Similarly, increasing the loading amount on SiO2 from 4 wt % to 20 wt % increases the Ir-based activity and 1,4-BuD selectivity, although they remain lower than those for TiO2 -supported catalyst with 4 wt % Ir. High metal loadings on the support seem to be important.
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Affiliation(s)
- Minyan Gu
- Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07, Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
- College of Environmental Science and Engineering, Institute of New Rural Development, Tongji University, 1239 Siping Road, Shanghai, 200092, P. R. China
| | - Lujie Liu
- Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07, Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
| | - Yoshinao Nakagawa
- Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07, Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
| | - Congcong Li
- Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07, Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
| | - Masazumi Tamura
- Research Center for Artificial Photosynthesis, Advanced Research Institute for Natural Science and Technology, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka, 558-8585, Japan
| | - Zheng Shen
- College of Environmental Science and Engineering, Institute of New Rural Development, Tongji University, 1239 Siping Road, Shanghai, 200092, P. R. China
| | - Xuefei Zhou
- College of Environmental Science and Engineering, Institute of New Rural Development, Tongji University, 1239 Siping Road, Shanghai, 200092, P. R. China
| | - Yalei Zhang
- College of Environmental Science and Engineering, Institute of New Rural Development, Tongji University, 1239 Siping Road, Shanghai, 200092, P. R. China
| | - Keiichi Tomishige
- Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07, Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
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7
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HOG-Independent Osmoprotection by Erythritol in Yeast Yarrowia lipolytica. Genes (Basel) 2020; 11:genes11121424. [PMID: 33261148 PMCID: PMC7761004 DOI: 10.3390/genes11121424] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 11/18/2020] [Accepted: 11/19/2020] [Indexed: 12/19/2022] Open
Abstract
Erythritol is a polyol produced by Yarrowia lipolytica under hyperosmotic stress. In this study, the osmo-sensitive strain Y. lipolytica yl-hog1Δ was subjected to stress, triggered by a high concentration of carbon sources. The strain thrived on 0.75 M erythritol medium, while the same concentrations of glucose and glycerol proved to be lethal. The addition of 0.1 M erythritol to the medium containing 0.75 M glucose or glycerol allowed the growth of yl-hog1Δ. Supplementation with other potential osmolytes such as mannitol or L-proline did not have a similar effect. To examine whether the osmoprotective effect might be related to erythritol accumulation, we deleted two genes involved in erythritol utilization, the transcription factor Euf1 and the enzyme erythritol dehydrogenase Eyd1. The strain eyd1Δ yl hog1Δ, which lacked the erythritol utilization enzyme, reacted to the erythritol supplementation significantly better than yl-hog1Δ. On the other hand, the strain euf1Δ yl-hog1Δ became insensitive to supplementation, and the addition of erythritol could no longer improve the growth of this strain in hyperosmotic conditions. This indicates that Euf1 regulates additional, still unknown genes involved in erythritol metabolism.
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Nakagawa Y, Kasumi T, Ogihara J, Tamura M, Arai T, Tomishige K. Erythritol: Another C4 Platform Chemical in Biomass Refinery. ACS OMEGA 2020; 5:2520-2530. [PMID: 32095676 PMCID: PMC7033684 DOI: 10.1021/acsomega.9b04046] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 01/27/2020] [Indexed: 05/08/2023]
Abstract
The potential of erythritol as a platform chemical in biomass refinery is discussed in terms of erythritol production and utilization. Regarding erythritol production, fermentation of sugar or starch has been already commercialized. The shift of the carbon source from glucose to inexpensive inedible waste glycerol is being investigated, which will decrease the price of erythritol. The carbon-based yield of erythritol from glycerol is comparable to or even higher than that from glucose. The metabolic pathway of erythritol biosynthesis has become clarified: erythrose-4-phosphate, which is one of the intermediates in the pentose phosphate pathway, is dephosphorylated and reduced to erythritol. The information about the metabolic pathway may give insights to improve the productivity by bleeding. Regarding erythritol utilization, chemical conversions of erythritol, especially deoxygenation, have been investigated in these days. Erythritol is easily dehydrated to 1,4-anhydroerythritol, which can be also used as the substrate for production of useful C4 chemicals. C-O hydrogenolysis and deoxydehydration using heterogeneous catalysts are effective reactions for erythritol/1,4-anhydroerythritol conversion.
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Affiliation(s)
- Yoshinao Nakagawa
- Department
of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
- Research
Center for Rare Metal and Green Innovation, Tohoku University, 468-1,
Aoba, Aramaki, Aoba-ku, Sendai 980-0845, Japan
| | - Takafumi Kasumi
- Applied
Microbiology and Biotechnology Laboratory, College of Bioresource
Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-0880, Japan
| | - Jun Ogihara
- Applied
Microbiology and Biotechnology Laboratory, College of Bioresource
Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-0880, Japan
| | - Masazumi Tamura
- Department
of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
- Research
Center for Rare Metal and Green Innovation, Tohoku University, 468-1,
Aoba, Aramaki, Aoba-ku, Sendai 980-0845, Japan
| | - Takashi Arai
- Daicel
Corporation, 1-8-23,
Konan, Minato-ku, Tokyo 108-8230, Japan
- Industry-Academia
Collaborative Research Laboratory, Kanazawa
University, Kakuma, Kanazawa, Ishikawa 920-1192, Japan
| | - Keiichi Tomishige
- Department
of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan
- Research
Center for Rare Metal and Green Innovation, Tohoku University, 468-1,
Aoba, Aramaki, Aoba-ku, Sendai 980-0845, Japan
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Wang T, Tamura M, Nakagawa Y, Tomishige K. Preparation of Highly Active Monometallic Rhenium Catalysts for Selective Synthesis of 1,4-Butanediol from 1,4-Anhydroerythritol. CHEMSUSCHEM 2019; 12:3615-3626. [PMID: 31134740 DOI: 10.1002/cssc.201900900] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 05/24/2019] [Indexed: 05/23/2023]
Abstract
1,4-Butanediol can be produced from 1,4-anhydroerythritol through the co-catalysis of monometallic mixed catalysts (ReOx /CeO2 +ReOx /C) in the one-pot reduction with H2 . The highest yield of 1,4-butanediol was over 80 %, which is similar to the value obtained over ReOx -Au/CeO2 +ReOx /C catalysts. Mixed catalysts of CeO2 +ReOx /C showed almost the same performance, giving 89 % yield of 1,4-butanediol. The reactivity trends of possible intermediates suggest that the reaction mechanism over ReOx /CeO2 +ReOx /C is similar to that over ReOx -Au/CeO2 +ReOx /C: deoxydehydration (DODH) of 1,4-anhydroerythritol to 2,5-dihydrofuran over ReOx species on the CeO2 support with the promotion of H2 activation by ReOx /C, isomerization of 2,5-dihydrofuran to 2,3-dihydrofuran catalyzed by ReOx on the C support, hydration of 2,3-dihydrofuran catalyzed by C, and hydrogenation to 1,4-butanediol catalyzed by ReOx /C. The reaction order of conversion of 1,4-anhydroerythritol with respect to H2 pressure is almost zero and this indicates that the rate-determining step is the formation of 2,5-dihydrofuran from the coordinated substrate with reduced Re in the DODH step. The activity of ReOx /CeO2 +ReOx /C is higher than that of ReOx -Au/CeO2 +ReOx /C, which is probably related to the reducibility of ReOx /C and the mobility of the Re species between the supports. High-valent Re species such as Re7+ on the CeO2 and C supports are mobile in the solvent; however, low-valent Re species, including metallic Re species, have much lower mobility. Metallic Re and cationic low-valent Re species with high reducibility and low mobility can be present on the carbon support as a trigger for H2 activation and promoter of the reduction of Re species on CeO2 . The presence of noble metals such as Au can enhance the reducibility through the activation of H2 molecules on the noble metal and the formation of spilt-over hydrogen over noble metal/CeO2 , as indicated by H2 temperature-programmed reduction. The higher reducibility of ReOx -Au/CeO2 lowers the DODH activity of ReOx -Au/CeO2 +ReOx /C in comparison with ReOx /CeO2 +ReOx /C by restricting the movement of Re species from C to CeO2 .
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Affiliation(s)
- Tianmiao Wang
- Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
| | - Masazumi Tamura
- Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
- Research Center for Rare Metal and Green Innovation, Tohoku University, 468-1 Aoba, Aramaki, Aoba-ku, Sendai, 980-0845, Japan
| | - Yoshinao Nakagawa
- Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
- Research Center for Rare Metal and Green Innovation, Tohoku University, 468-1 Aoba, Aramaki, Aoba-ku, Sendai, 980-0845, Japan
| | - Keiichi Tomishige
- Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
- Research Center for Rare Metal and Green Innovation, Tohoku University, 468-1 Aoba, Aramaki, Aoba-ku, Sendai, 980-0845, Japan
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10
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Carly F, Fickers P. Erythritol production by yeasts: a snapshot of current knowledge. Yeast 2018; 35:455-463. [DOI: 10.1002/yea.3306] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 12/02/2017] [Accepted: 12/22/2017] [Indexed: 11/08/2022] Open
Affiliation(s)
- Frédéric Carly
- Unité de Biotechnologies et Bioprocédés; Université Libre de Bruxelles; Belgium
| | - Patrick Fickers
- Microbial Processes and Interactions, TERRA Teaching and Research Centre; University of Liège - Gembloux Agro-Bio Tech; Belgium
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