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Genetically Engineering Escherichia coli to Produce Xylitol from Corncob Hydrolysate without Lime Detoxification. Molecules 2023; 28:molecules28041550. [PMID: 36838538 PMCID: PMC9967598 DOI: 10.3390/molecules28041550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 02/02/2023] [Accepted: 02/03/2023] [Indexed: 02/09/2023] Open
Abstract
Before fermentation with hemicellulosic hydrolysate as a substrate, it is generally necessary to detoxify the toxic substances that are harmful to microorganism growth. Cyclic AMP receptor protein (CRP) is a global regulator, and mutation of its key sites may have an important impact on E. coli virulence tolerance. Using corncob hydrolysate without ion-exchange or lime detoxification as the substrate, shake flask fermentation experiments showed that CRP mutant IS5-dG (I112L, T127G, A144T) produced 18.4 g/L of xylitol within 34 h, and the OD600 was 9.7 at 24 h; these values were 41.5% and 21.3% higher than those of the starting strain, IS5-d, respectively. This mutant produced 82 g/L of xylitol from corncob hydrolysate without ion-exchange or lime detoxification during fed-batch fermentation in a 15-L bioreactor, with a productivity of 1.04 g/L/h; these values were 173% and 174% higher than the starting strain, respectively. To our knowledge, this is the highest xylitol concentration and productivity produced by microbial fermentation using completely non-detoxified hemicellulosic hydrolysate as the substrate to date. This study also showed that alkali neutralization, high temperature sterilization, and fermentation of the hydrolysate had important effects on the xylose loss rate and xylitol production.
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Jin T, Xing X, Xie Y, Sun Y, Bian S, Liu L, Chen G, Wang X, Yu X, Su Y. Evaluation of Preparation and Detoxification of Hemicellulose Hydrolysate for Improved Xylitol Production from Quinoa Straw. Int J Mol Sci 2022; 24:ijms24010516. [PMID: 36613957 PMCID: PMC9820623 DOI: 10.3390/ijms24010516] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/11/2022] [Accepted: 12/21/2022] [Indexed: 12/29/2022] Open
Abstract
Quinoa straw is rich in hemicellulose, and it could be hydrolyzed into xylose. It is a promising energy resource alternative that acts as a potential low-cost material for producing xylitol. In this study, quinoa straw was used as a substrate subjected to the hydrolysis of dilute sulfuric acid solution. Based on the production of xylose and inhibitors during hydrolysis, the optimal conditions for the hydrolysis of hemicellulose in quinoa straw were determined. Detoxification was performed via activated carbon adsorption. The optimal detoxification conditions were determined on the basis of major inhibitor concentrations in the hydrolysate. When the addition of activated carbon was 3% at 30 °C for 40 min, the removal of formic acid, acetic acid, furfural, and 5-HMF could reach 66.52%, 64.54%, 88.31%, and 89.44%, respectively. In addition to activated carbon adsorption, vacuum evaporation was further conducted to perform two-step detoxification. Subsequently, the detoxified hydrolysate was used for xylitol fermentation. The yield of xylitol reached 0.50 g/g after 96 h of fermentation by Candida tropicalis (CICC 1779). It is 1.2-fold higher than that obtained through the sole vacuum evaporation method. This study validated the feasibility of xylitol production from quinoa straw via a biorefinery process.
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Affiliation(s)
- Tingwei Jin
- College of Life Science, Jilin Agricultural University, Changchun 130118, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, The Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Xiwen Xing
- College of Life Science, Jilin Agricultural University, Changchun 130118, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, The Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Yubing Xie
- College of Life Science, Jilin Agricultural University, Changchun 130118, China
| | - Yan Sun
- College of Life Science, Jilin Agricultural University, Changchun 130118, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, The Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Sijia Bian
- College of Life Science, Jilin Agricultural University, Changchun 130118, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, The Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Liying Liu
- College of Life Science, Jilin Agricultural University, Changchun 130118, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, The Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Guang Chen
- College of Life Science, Jilin Agricultural University, Changchun 130118, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, The Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Xinzhe Wang
- College of Life Science, Jilin Agricultural University, Changchun 130118, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, The Ministry of Education, Jilin Agricultural University, Changchun 130118, China
| | - Xiaoxiao Yu
- College of Life Science, Jilin Agricultural University, Changchun 130118, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, The Ministry of Education, Jilin Agricultural University, Changchun 130118, China
- Correspondence: (X.Y.); (Y.S.)
| | - Yingjie Su
- College of Life Science, Jilin Agricultural University, Changchun 130118, China
- Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, The Ministry of Education, Jilin Agricultural University, Changchun 130118, China
- Correspondence: (X.Y.); (Y.S.)
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Wang L, Qi A, Liu J, Shen Y, Wang J. Comparative metabolic analysis of the adaptive Candida tropicalis to furfural stress response. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.118348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Prabhu AA, Bosakornranut E, Amraoui Y, Agrawal D, Coulon F, Vivekanand V, Thakur VK, Kumar V. Enhanced xylitol production using non-detoxified xylose rich pre-hydrolysate from sugarcane bagasse by newly isolated Pichia fermentans. BIOTECHNOLOGY FOR BIOFUELS 2020; 13:209. [PMID: 33375948 PMCID: PMC7772924 DOI: 10.1186/s13068-020-01845-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 11/28/2020] [Indexed: 05/09/2023]
Abstract
BACKGROUND Integrated management of hemicellulosic fraction and its economical transformation to value-added products is the key driver towards sustainable lignocellulosic biorefineries. In this aspect, microbial cell factories are harnessed for the sustainable production of commercially viable biochemicals by valorising C5 and C6 sugars generated from agro-industrial waste. However, in the terrestrial ecosystem, microbial systems can efficiently consume glucose. On the contrary, pentose sugars are less preferred carbon source as most of the microbes lack metabolic pathway for their utilization. The effective utilization of both pentose and hexose sugars is key for economical biorefinery. RESULTS Bioprospecting the food waste and selective enrichment on xylose-rich medium led to screening and isolation of yeast which was phylogenetically identified as Pichia fermentans. The newly isolated xylose assimilating yeast was explored for xylitol production. The wild type strain robustly grew on xylose and produced xylitol with > 40% conversion yield. Chemical mutagenesis of isolated yeast with ethyl methanesulphonate (EMS) yielded seven mutants. The mutant obtained after 15 min EMS exposure, exhibited best xylose bioconversion efficiency. This mutant under shake flask conditions produced maximum xylitol titer and yield of 34.0 g/L and 0.68 g/g, respectively. However, under the same conditions, the control wild type strain accumulated 27.0 g/L xylitol with a conversion yield of 0.45 g/g. Improved performance of the mutant was attributed to 34.6% activity enhancement in xylose reductase with simultaneous reduction of xylitol dehydrogenase activity by 22.9%. Later, the culture medium was optimized using statistical design and validated at shake flask and bioreactor level. Bioreactor studies affirmed the competence of the mutant for xylitol accumulation. The xylitol titer and yield obtained with pure xylose were 98.9 g/L and 0.67 g/g, respectively. In comparison, xylitol produced using non-detoxified xylose rich pre-hydrolysate from sugarcane bagasse was 79.0 g/L with an overall yield of 0.54 g/g. CONCLUSION This study demonstrates the potential of newly isolated P. fermentans in successfully valorising the hemicellulosic fraction for the sustainable xylitol production.
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Affiliation(s)
- Ashish A Prabhu
- School of Water, Energy and Environment, Cranfield University, Cranfield, MK43 0AL, UK
| | - Ekkarin Bosakornranut
- School of Water, Energy and Environment, Cranfield University, Cranfield, MK43 0AL, UK
| | - Yassin Amraoui
- School of Water, Energy and Environment, Cranfield University, Cranfield, MK43 0AL, UK
| | - Deepti Agrawal
- Biochemistry and Biotechnology Area, Material Resource Efficiency Division, CSIR-Indian Institute of Petroleum, Mohkampur, Dehradun, 248005, India
| | - Frederic Coulon
- School of Water, Energy and Environment, Cranfield University, Cranfield, MK43 0AL, UK
| | - Vivekanand Vivekanand
- Centre for Energy and Environment, Malaviya National Institute of Technology, Jaipur, Rajasthan, 302017, India
| | - Vijay Kumar Thakur
- Biorefining and Advanced Materials Research Centre, Scotland's Rural College (SRUC), Edinburgh, UK
| | - Vinod Kumar
- School of Water, Energy and Environment, Cranfield University, Cranfield, MK43 0AL, UK.
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Combination of the CRP mutation and ptsG deletion in Escherichia coli to efficiently synthesize xylitol from corncob hydrolysates. Appl Microbiol Biotechnol 2020; 104:2039-2050. [PMID: 31950219 DOI: 10.1007/s00253-019-10324-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 12/05/2019] [Accepted: 12/15/2019] [Indexed: 12/16/2022]
Abstract
The biotechnology-based production of xylitol has received widespread attention because it can use cheap and renewable lignocellulose as a raw material, thereby decreasing costs and pollution. The simultaneous use of various sugars in lignocellulose hydrolysates is a primary prerequisite for efficient xylitol production. In this study, a ΔptsG and crp* combinatorial strategy was used to generate Escherichia coli W3110 strain IS5-dI, which completely eliminated glucose repression and simultaneously used glucose and xylose. This strain produced 164 g/L xylitol from detoxified corncob hydrolysates during a fed-batch fermentation in a 15-L bioreactor, which was 14.7% higher than the xylitol produced by the starting strain, IS5-d (143 g/L), and the xylitol productivity was 3.04 g/L/h. These results represent the highest xylitol concentration and productivity reported to date for bacteria and hemicellulosic sugars. Additionally, strain IS5-dG, which differs from IS5-dI at CRP amino acid residue 127 (I127G), was tolerant to the toxins in corncob hydrolysates. In a fed-batch fermentation experiment involving a 15-L bioreactor, IS5-dG produced 137 g/L xylitol from non-detoxified corncob hydrolysates, with a productivity of 1.76 g/L/h. On the basis of these results, we believe that IS5-dI and IS5-dG may be useful host strains for the industrial-scale production of xylitol from detoxified or non-detoxified corncob hydrolysates.
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Park JB, Kim JS, Kweon DH, Kweon DH, Seo JH, Ha SJ. Overexpression of Endogenous Xylose Reductase Enhanced Xylitol Productivity at 40 °C by Thermotolerant Yeast Kluyveromyces marxianus. Appl Biochem Biotechnol 2019; 189:459-470. [DOI: 10.1007/s12010-019-03019-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 04/22/2019] [Indexed: 10/26/2022]
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Damião Xavier F, Santos Bezerra G, Florentino Melo Santos S, Sousa Conrado Oliveira L, Luiz Honorato Silva F, Joice Oliveira Silva A, Maria Conceição M. Evaluation of the Simultaneous Production of Xylitol and Ethanol from Sisal Fiber. Biomolecules 2018; 8:E2. [PMID: 29320469 PMCID: PMC5871971 DOI: 10.3390/biom8010002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 01/03/2018] [Accepted: 01/04/2018] [Indexed: 12/03/2022] Open
Abstract
Recent years have seen an increase in the use of lignocellulosic materials in the development of bioproducts. Because sisal fiber is a low cost raw material and is readily available, this work aimed to evaluate its hemicellulose fraction for the simultaneous production of xylitol and ethanol. The sisal fiber presented a higher hemicellulose content than other frequently-employed biomasses, such as sugarcane bagasse. A pretreatment with dilute acid and low temperatures was conducted in order to obtain the hemicellulose fraction. The highest xylose contents (0.132 g·g-1 of sisal fiber) were obtained at 120 °C with 2.5% (v/v) of sulfuric acid. The yeast Candida tropicalis CCT 1516 was used in the fermentation. In the sisal fiber hemicellulose hydrolysate, the maximum production of xylitol (0.32 g·g-1) and of ethanol (0.27 g·g-1) was achieved in 60 h. Thus, sisal fiber presents as a potential biomass for the production of ethanol and xylitol, creating value with the use of hemicellulosic liquor without detoxification and without the additional steps of alkaline pretreatment.
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Affiliation(s)
- Franklin Damião Xavier
- Departamento de Química, PPGQ/CCEN, Universidade Federal da Paraíba, João Pessoa 58051-970, Brazil.
| | - Gustavo Santos Bezerra
- Departamento de Química, PPGQ/CCEN, Universidade Federal da Paraíba, João Pessoa 58051-970, Brazil.
| | | | - Líbia Sousa Conrado Oliveira
- Unidade Acadêmica de Engenharia Química/CCT, Universidade Federal de Campina Grande, Campina Grande 58429-140, Brazil.
| | | | | | - Marta Maria Conceição
- Centro de Tecnologia e Desenvolvimento Regional (CTDR)/Departamento de Tecnologia de Alimentos (DTA)/IDEP, Universidade Federal da Paraíba, Av. dos Escoteiros, sn. Mangabeira VII, João Pessoa 58058-600, Brazil.
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Fehér A, Fehér C, Rozbach M, Rácz G, Fekete M, Hegedűs L, Barta Z. Treatments of Lignocellulosic Hydrolysates and Continuous-Flow Hydrogenation of Xylose to Xylitol. Chem Eng Technol 2017. [DOI: 10.1002/ceat.201700103] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anikó Fehér
- Budapest University of Technology and Economics; Department of Applied Biotechnology and Food Science; Faculty of Chemical Technology and Biotechnology; Szt. Gellért tér 4 1111 Budapest Hungary
| | - Csaba Fehér
- Budapest University of Technology and Economics; Department of Applied Biotechnology and Food Science; Faculty of Chemical Technology and Biotechnology; Szt. Gellért tér 4 1111 Budapest Hungary
| | - Margaréta Rozbach
- Budapest University of Technology and Economics; Department of Applied Biotechnology and Food Science; Faculty of Chemical Technology and Biotechnology; Szt. Gellért tér 4 1111 Budapest Hungary
| | - Gergely Rácz
- Budapest University of Technology and Economics; Department of Applied Biotechnology and Food Science; Faculty of Chemical Technology and Biotechnology; Szt. Gellért tér 4 1111 Budapest Hungary
| | - Melinda Fekete
- Enzymicals AG; Walther-Rathenau-Straße 49a 17489 Greifswald Germany
| | - László Hegedűs
- Budapest University of Technology and Economics and Hungarian Academy of Sciences; MTA-BME Organic Chemical Technology Research Group; Department of Organic Chemistry and Technology; Faculty of Chemical Technology and Biotechnology; Budafoki út 8 1111 Budapest Hungary
| | - Zsolt Barta
- Budapest University of Technology and Economics; Department of Applied Biotechnology and Food Science; Faculty of Chemical Technology and Biotechnology; Szt. Gellért tér 4 1111 Budapest Hungary
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Xylitol production by genetically modified industrial strain of Saccharomyces cerevisiae using glycerol as co-substrate. ACTA ACUST UNITED AC 2017; 44:961-971. [DOI: 10.1007/s10295-017-1914-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Accepted: 01/29/2017] [Indexed: 10/20/2022]
Abstract
Abstract
Xylitol is commercially used in chewing gum and dental care products as a low calorie sweetener having medicinal properties. Industrial yeast strain of S. cerevisiae was genetically modified to overexpress an endogenous aldose reductase gene GRE3 and a xylose transporter gene SUT1 for the production of xylitol. The recombinant strain (XP-RTK) carried the expression cassettes of both the genes and the G418 resistance marker cassette KanMX integrated into the genome of S. cerevisiae. Short segments from the 5′ and 3′ delta regions of the Ty1 retrotransposons were used as homology regions for integration of the cassettes. Xylitol production by the industrial recombinant strain was evaluated using hemicellulosic hydrolysate of the corn cob with glucose as the cosubstrate. The recombinant strain XP-RTK showed significantly higher xylitol productivity (212 mg L−1 h−1) over the control strain XP (81 mg L−1 h−1). Glucose was successfully replaced by glycerol as a co-substrate for xylitol production by S. cerevisiae. Strain XP-RTK showed the highest xylitol productivity of 318.6 mg L−1 h−1 and titre of 47 g L−1 of xylitol at 12 g L−1 initial DCW using glycerol as cosubstrate. The amount of glycerol consumed per amount of xylitol produced (0.47 mol mol−1) was significantly lower than glucose (23.7 mol mol−1). Fermentation strategies such as cell recycle and use of the industrial nitrogen sources were demonstrated using hemicellulosic hydrolysate for xylitol production.
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Challenges and prospects of xylitol production with whole cell bio-catalysis: A review. Microbiol Res 2017; 197:9-21. [DOI: 10.1016/j.micres.2016.12.012] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2016] [Revised: 12/09/2016] [Accepted: 12/30/2016] [Indexed: 11/19/2022]
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Kogje A, Ghosalkar A. Xylitol production by Saccharomyces cerevisiae overexpressing different xylose reductases using non-detoxified hemicellulosic hydrolysate of corncob. 3 Biotech 2016; 6:127. [PMID: 28330197 PMCID: PMC4909029 DOI: 10.1007/s13205-016-0444-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 05/25/2016] [Indexed: 02/03/2023] Open
Abstract
Xylitol production was compared in fed batch fermentation by Saccharomyces cerevisiae strains overexpressing xylose reductase (XR) genes from Candida tropicalis, Pichia stipitis, Neurospora crassa, and an endogenous gene GRE3. The gene encoding a xylose specific transporter (SUT1) from P. stipitis was cloned to improve xylose transport and fed batch fermentation was used with glucose as a cosubstrate to regenerate NADPH. Xylitol yield was near theoretical for all the strains in fed batch fermentation. The highest volumetric (0.28 gL-1 h-1) and specific (34 mgg-1 h-1) xylitol productivities were obtained by the strain overexpressing GRE3 gene, while the control strain showed 7.2 mgg-1 h-1 specific productivity. The recombinant strains carrying XR from C. tropicalis, P. stipitis, and N. crassa produced xylitol with lower specific productivity of 14.3, 6.8, and 6.3 mgg-1 h-1, respectively, than GRE3 overexpressing strain. The glucose fed as cosubstrate was converted to biomass and ethanol, while xylose was only converted to xylitol. The efficiency of ethanol production was in the range of 38-45 % of the theoretical maximum for all the strains. Xylitol production from the non-detoxified corncob hemicellulosic hydrolysate by recombinant S. cerevisiae was reported for the first time. Xylitol productivity was found to be equivalent in the synthetic xylose as well as hemicellulosic hydrolysate-based media showing no inhibition on the S. cerevisiae due to the inhibitors present in the hydrolysate. A systematic evaluation of heterologous XRs and endogenous GRE3 genes was performed, and the strain overexpressing the endogenous GRE3 gene showed the best xylitol productivity.
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Affiliation(s)
- Anushree Kogje
- Department of Technology, Savitribai Phule Pune University, Pune, Maharashtra 411007 India
- Division of Praj Industries Limited, Praj-Matrix - R & D Centre, 402/403/1098, Urawade, Pune, Maharashtra 412115 India
| | - Anand Ghosalkar
- Division of Praj Industries Limited, Praj-Matrix - R & D Centre, 402/403/1098, Urawade, Pune, Maharashtra 412115 India
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Park JB, Kim JS, Jang SW, Kweon DH, Hong EK, Shin WC, Ha SJ. Sequence analysis of KmXYL1 genes and verification of thermotolerant enzymatic activities of xylose reductase from four Kluyveromyces marxianus strains. BIOTECHNOL BIOPROC E 2016. [DOI: 10.1007/s12257-016-0363-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Alkim C, Trichez D, Cam Y, Spina L, François JM, Walther T. The synthetic xylulose-1 phosphate pathway increases production of glycolic acid from xylose-rich sugar mixtures. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:201. [PMID: 27679669 PMCID: PMC5029101 DOI: 10.1186/s13068-016-0610-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 09/01/2016] [Indexed: 05/24/2023]
Abstract
BACKGROUND Glycolic acid (GA) is a two-carbon hydroxyacid with applications in the cosmetic, textile, and medical industry. Microbial GA production from all sugars can be achieved by engineering the natural glyoxylate shunt. The synthetic (d)-xylulose-1 phosphate (X1P) pathway provides a complementary route to produce GA from (d)-xylose. The simultaneous operation of the X1P and glyoxylate pathways increases the theoretical GA yield from xylose by 20 %, which may strongly improve GA production from hemicellulosic hydrolysates. RESULTS We herein describe the construction of an E. coli strain that produces GA via the glyoxylate pathway at a yield of 0.31 , 0.29 , and 0.37 g/g from glucose, xylose, or a mixture of glucose and xylose (mass ratio: 33:66 %), respectively. When the X1P pathway operates in addition to the glyoxylate pathway, the GA yields on the three substrates are, respectively, 0.39 , 0.43 , and 0.47 g/g. Upon constitutive expression of the sugar permease GalP, the GA yield of the strain which simultaneously operates the glyoxylate and X1P pathways further increases to 0.63 g/g when growing on the glucose/xylose mixture. Under these conditions, the GA yield on the xylose fraction of the sugar mixture reaches 0.75 g/g, which is the highest yield reported to date. CONCLUSIONS These results demonstrate that the synthetic X1P pathway has a very strong potential to improve GA production from xylose-rich hemicellulosic hydrolysates.
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Affiliation(s)
- Ceren Alkim
- LISBP, CNRS, INRA, INSA, Université de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
- TWB, 3 rue Ariane, 31520 Ramonville-St. Agne, France
| | - Debora Trichez
- LISBP, CNRS, INRA, INSA, Université de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
- TWB, 3 rue Ariane, 31520 Ramonville-St. Agne, France
| | - Yvan Cam
- LISBP, CNRS, INRA, INSA, Université de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
- TWB, 3 rue Ariane, 31520 Ramonville-St. Agne, France
| | - Lucie Spina
- LISBP, CNRS, INRA, INSA, Université de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
- TWB, 3 rue Ariane, 31520 Ramonville-St. Agne, France
| | - Jean Marie François
- LISBP, CNRS, INRA, INSA, Université de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
- TWB, 3 rue Ariane, 31520 Ramonville-St. Agne, France
| | - Thomas Walther
- LISBP, CNRS, INRA, INSA, Université de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
- TWB, 3 rue Ariane, 31520 Ramonville-St. Agne, France
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Mohamad NL, Mustapa Kamal SM, Mokhtar MN, Husain SA, Abdullah N. Dynamic mathematical modelling of reaction kinetics for xylitol fermentation using Candida tropicalis. Biochem Eng J 2016. [DOI: 10.1016/j.bej.2016.02.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Wang H, Li L, Zhang L, An J, Cheng H, Deng Z. Xylitol production from waste xylose mother liquor containing miscellaneous sugars and inhibitors: one-pot biotransformation by Candida tropicalis and recombinant Bacillus subtilis. Microb Cell Fact 2016; 15:82. [PMID: 27184671 PMCID: PMC4869185 DOI: 10.1186/s12934-016-0480-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 05/03/2016] [Indexed: 11/10/2022] Open
Abstract
Background The process of industrial xylitol production is a massive source of organic pollutants, such as waste xylose mother liquor (WXML), a viscous reddish-brown liquid. Currently, WXML is difficult to reuse due to its miscellaneous low-cost sugars, high content of inhibitors and complex composition. WXML, as an organic pollutant of hemicellulosic hydrolysates, accumulates and has become an issue of industrial concern in China. Previous studies have focused only on the catalysis of xylose in the hydrolysates into xylitol using one strain, without considering the removal of other miscellaneous sugars, thus creating an obstacle to subsequent large-scale purification. In the present study, we aimed to develop a simple one-pot biotransformation to produce high-purity xylitol from WXML to improve its economic value. Results In the present study, we developed a procedure to produce xylitol from WXML, which combines detoxification, biotransformation and removal of by-product sugars (purification) in one bioreactor using two complementary strains, Candida tropicalis X828 and Bacillus subtilis Bs12. At the first stage of micro-aerobic biotransformation, the yeast cells were allowed to grow and metabolized glucose and the inhibitors furfural and hydroxymethyl furfural (HMF), and converted xylose into xylitol. At the second stage of aerobic biotransformation, B. subtilis Bs12 was activated and depleted the by-product sugars. The one-pot process was successfully scaled up from shake flasks to 5, 150 L and 30 m3 bioreactors. Approximately 95 g/L of pure xylitol could be obtained from the medium containing 400 g/L of WXML at a yield of 0.75 g/g xylose consumed, and the by-product sugars glucose, l-arabinose and galactose were depleted simultaneously. Conclusions Our results demonstrate that the one-pot procedure is a viable option for the industrial application of WXML to produce value-added chemicals. The integration of complementary strains in the biotransformation of hemicellulosic hydrolysates is efficient under optimized conditions. Moreover, our study of one-pot biotransformation also provides useful information on the combination of biotechnological processes for the biotransformation of other compounds.
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Affiliation(s)
- Hengwei Wang
- Innovation and Application Institute (IAI), Zhejiang Ocean University, Zhoushan, 316022, China
| | - Lijuan Li
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Lebin Zhang
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Jin An
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Hairong Cheng
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - Zixin Deng
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
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16
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Wang B, Shen XJ, Wen JL, Sun RC. A mild AlCl3-catalyzed ethanol pretreatment and its effects on the structural changes of Eucalyptus wood lignin and the saccharification efficiency. RSC Adv 2016. [DOI: 10.1039/c6ra09640a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The aluminium chloride catalyzed ethanol/water deconstructing strategy was developed for obtaining dissociated lignin and easily digestible substrates.
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Affiliation(s)
- Bing Wang
- Beijing Key Laboratory of Lignocellulosic Chemistry
- Beijing Forestry University
- Beijing
- China
| | - Xiao-Jun Shen
- Beijing Key Laboratory of Lignocellulosic Chemistry
- Beijing Forestry University
- Beijing
- China
| | - Jia-Long Wen
- Beijing Key Laboratory of Lignocellulosic Chemistry
- Beijing Forestry University
- Beijing
- China
| | - Run-Cang Sun
- Beijing Key Laboratory of Lignocellulosic Chemistry
- Beijing Forestry University
- Beijing
- China
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17
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18
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Alkim C, Cam Y, Trichez D, Auriol C, Spina L, Vax A, Bartolo F, Besse P, François JM, Walther T. Optimization of ethylene glycol production from (D)-xylose via a synthetic pathway implemented in Escherichia coli. Microb Cell Fact 2015; 14:127. [PMID: 26336892 PMCID: PMC4559361 DOI: 10.1186/s12934-015-0312-7] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2015] [Accepted: 08/04/2015] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND Ethylene glycol (EG) is a bulk chemical that is mainly used as an anti-freezing agent and a raw material in the synthesis of plastics. Production of commercial EG currently exclusively relies on chemical synthesis using fossil resources. Biochemical production of ethylene glycol from renewable resources may be more sustainable. RESULTS Herein, a synthetic pathway is described that produces EG in Escherichia coli through the action of (D)-xylose isomerase, (D)-xylulose-1-kinase, (D)-xylulose-1-phosphate aldolase, and glycolaldehyde reductase. These reactions were successively catalyzed by the endogenous xylose isomerase (XylA), the heterologously expressed human hexokinase (Khk-C) and aldolase (Aldo-B), and an endogenous glycolaldehyde reductase activity, respectively, which we showed to be encoded by yqhD. The production strain was optimized by deleting the genes encoding for (D)-xylulose-5 kinase (xylB) and glycolaldehyde dehydrogenase (aldA), and by overexpressing the candidate glycolaldehyde reductases YqhD, GldA, and FucO. The strain overproducing FucO was the best EG producer reaching a molar yield of 0.94 in shake flasks, and accumulating 20 g/L EG with a molar yield and productivity of 0.91 and 0.37 g/(L.h), respectively, in a controlled bioreactor under aerobic conditions. CONCLUSIONS We have demonstrated the feasibility to produce EG from (D)-xylose via a synthetic pathway in E. coli at approximately 90 % of the theoretical yield.
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Affiliation(s)
- Ceren Alkim
- INSA, UPS, INP, LISBP, Université de Toulouse, 135 Avenue de Rangueil, 31077, Toulouse, France. .,UMR792 Ingénierie des Systèmes Biologiques et des Procédés (LISBP), INRA, Toulouse, France. .,CNRS, UMR5504, Toulouse, France. .,TWB, 3 rue Ariane, 31520, Ramonville-St. Agnes, France.
| | - Yvan Cam
- INSA, UPS, INP, LISBP, Université de Toulouse, 135 Avenue de Rangueil, 31077, Toulouse, France. .,UMR792 Ingénierie des Systèmes Biologiques et des Procédés (LISBP), INRA, Toulouse, France. .,CNRS, UMR5504, Toulouse, France. .,TWB, 3 rue Ariane, 31520, Ramonville-St. Agnes, France.
| | - Debora Trichez
- INSA, UPS, INP, LISBP, Université de Toulouse, 135 Avenue de Rangueil, 31077, Toulouse, France. .,UMR792 Ingénierie des Systèmes Biologiques et des Procédés (LISBP), INRA, Toulouse, France. .,CNRS, UMR5504, Toulouse, France.
| | - Clément Auriol
- INSA, UPS, INP, LISBP, Université de Toulouse, 135 Avenue de Rangueil, 31077, Toulouse, France. .,UMR792 Ingénierie des Systèmes Biologiques et des Procédés (LISBP), INRA, Toulouse, France. .,CNRS, UMR5504, Toulouse, France. .,TWB, 3 rue Ariane, 31520, Ramonville-St. Agnes, France.
| | - Lucie Spina
- INSA, UPS, INP, LISBP, Université de Toulouse, 135 Avenue de Rangueil, 31077, Toulouse, France. .,UMR792 Ingénierie des Systèmes Biologiques et des Procédés (LISBP), INRA, Toulouse, France. .,CNRS, UMR5504, Toulouse, France.
| | - Amélie Vax
- INSA, UPS, INP, LISBP, Université de Toulouse, 135 Avenue de Rangueil, 31077, Toulouse, France. .,UMR792 Ingénierie des Systèmes Biologiques et des Procédés (LISBP), INRA, Toulouse, France. .,CNRS, UMR5504, Toulouse, France.
| | - François Bartolo
- UMR CNRS 5219, Institut de Mathématiques de Toulouse, INSA, Université de Toulouse, Toulouse, France.
| | - Philippe Besse
- UMR CNRS 5219, Institut de Mathématiques de Toulouse, INSA, Université de Toulouse, Toulouse, France.
| | - Jean Marie François
- INSA, UPS, INP, LISBP, Université de Toulouse, 135 Avenue de Rangueil, 31077, Toulouse, France. .,UMR792 Ingénierie des Systèmes Biologiques et des Procédés (LISBP), INRA, Toulouse, France. .,CNRS, UMR5504, Toulouse, France. .,TWB, 3 rue Ariane, 31520, Ramonville-St. Agnes, France.
| | - Thomas Walther
- INSA, UPS, INP, LISBP, Université de Toulouse, 135 Avenue de Rangueil, 31077, Toulouse, France. .,UMR792 Ingénierie des Systèmes Biologiques et des Procédés (LISBP), INRA, Toulouse, France. .,CNRS, UMR5504, Toulouse, France. .,TWB, 3 rue Ariane, 31520, Ramonville-St. Agnes, France.
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Sun ZY, Wang T, Tan L, Tang YQ, Kida K. Development of a more efficient process for production of fuel ethanol from bamboo. Bioprocess Biosyst Eng 2015; 38:1033-43. [DOI: 10.1007/s00449-014-1345-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 12/19/2014] [Indexed: 12/01/2022]
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20
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Huang Z, Zeng CC, Liu HP, Li LJ. Realtime Monitoring of Xylitol Fermentation by Micro-Raman Spectroscopy. ANAL LETT 2014. [DOI: 10.1080/00032719.2014.928883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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Mohamad NL, Mustapa Kamal SM, Mokhtar MN. Xylitol Biological Production: A Review of Recent Studies. FOOD REVIEWS INTERNATIONAL 2014. [DOI: 10.1080/87559129.2014.961077] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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22
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Zhu T, Li P, Wang X, Yang W, Chang H, Ma S. Optimization of formic acid hydrolysis of corn cob in xylose production. KOREAN J CHEM ENG 2014. [DOI: 10.1007/s11814-014-0073-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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23
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Strain Isolation and Study on Process Parameters for Xylose-to-Xylitol Bioconversion. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.2478/v10133-010-0013-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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24
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Zhang J, Zhang B, Wang D, Gao X, Hong J. Xylitol production at high temperature by engineered Kluyveromyces marxianus. BIORESOURCE TECHNOLOGY 2013; 152:192-201. [PMID: 24291795 DOI: 10.1016/j.biortech.2013.10.109] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 10/24/2013] [Accepted: 10/29/2013] [Indexed: 05/24/2023]
Abstract
Several recombinant Kluyveromyces marxianus strains were constructed through overexpressing the Neurospora crassa xylose reductase genes. YZJ015, which maintained the original xylitol dehydrogenase gene, produced xylitol with the highest productivity (1.49 g L(-1) h(-1)) from 100 g L(-1) xylose at 42 °C. Even at 45 °C, YZJ015 was still able to produce 60.03 g L(-1) xylitol from 100 g L(-1) xylose with a productivity of 1.25 g L(-1)h(-1). In addition, for 20 rounds of cell recycling at 42 °C, YZJ015 produced 71.35 g L(-1) xylitol from 100 g L(-1) xylose with a productivity of 4.43 g L(-1) h(-1) per cycle. YZJ017, in which the xylitol dehydrogenase gene was disrupted, produced 100.02 g L(-1) xylitol at a yield of 1.01 g g(-1) from 100 g L(-1) xylose with 40 g L(-1) glycerol as co-substrate at 42 °C. These engineered strains provide an excellent foundation for xylitol production at elevated temperatures.
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Affiliation(s)
- Jia Zhang
- School of Life Science, University of Science and Technology of China, Hefei, Anhui 230027, PR China; Hefei National Laboratory for Physical Science at the Microscale, Hefei, Anhui 230026, PR China
| | - Biao Zhang
- School of Life Science, University of Science and Technology of China, Hefei, Anhui 230027, PR China; Hefei National Laboratory for Physical Science at the Microscale, Hefei, Anhui 230026, PR China
| | - Dongmei Wang
- School of Life Science, University of Science and Technology of China, Hefei, Anhui 230027, PR China
| | - Xiaolian Gao
- School of Life Science, University of Science and Technology of China, Hefei, Anhui 230027, PR China; Department of Biology and Biochemistry, University of Houston, Houston, TX 77004-5001, USA; Hefei National Laboratory for Physical Science at the Microscale, Hefei, Anhui 230026, PR China
| | - Jiong Hong
- School of Life Science, University of Science and Technology of China, Hefei, Anhui 230027, PR China; Hefei National Laboratory for Physical Science at the Microscale, Hefei, Anhui 230026, PR China.
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25
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Wang Y, Yuan B, Ji Y, Li H. Hydrolysis of hemicellulose to produce fermentable monosaccharides by plasma acid. Carbohydr Polym 2013; 97:518-22. [DOI: 10.1016/j.carbpol.2013.05.017] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Revised: 03/23/2013] [Accepted: 05/09/2013] [Indexed: 11/27/2022]
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26
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Misra S, Raghuwanshi S, Gupta P, Saxena R. Examine growth inhibition pattern and lactic acid production in Streptococcus mutans using different concentrations of xylitol produced from Candida tropicalis by fermentation. Anaerobe 2012; 18:273-9. [DOI: 10.1016/j.anaerobe.2012.03.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Revised: 02/03/2012] [Accepted: 03/07/2012] [Indexed: 11/15/2022]
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27
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Chen WH, Xu YY, Hwang WS, Wang JB. Pretreatment of rice straw using an extrusion/extraction process at bench-scale for producing cellulosic ethanol. BIORESOURCE TECHNOLOGY 2011; 102:10451-10458. [PMID: 21958526 DOI: 10.1016/j.biortech.2011.08.118] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2011] [Revised: 08/28/2011] [Accepted: 08/29/2011] [Indexed: 05/31/2023]
Abstract
A combination of a twin-screw extrusion and an acid-catalyzed hot water extraction process performed at a bench-scale was used to prepare high monomeric xylose hydrolysate for cellulosic production. The influences of the screw speed (30-150 rpm), barrel temperature (80-160 °C) and corresponding specific mechanical energy of the extruder on the structural properties of the pretreated rice straw, sugar concentration and conversion were investigated. The optimal condition for the extrusion step was determined to be 40 rpm with 3% H2SO4 at 120 °C; the optimal condition for the extraction step was determined to be 130 °C for 20 min. After the pretreatment at the optimal condition, 83.7% of the xylan was converted to monomeric xylose, and the concentration reached levels of 53.7 g/L. Finally, after the subsequent enzymatic hydrolysis, an 80% yield of the total saccharification was obtained.
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Affiliation(s)
- Wen-Hua Chen
- Cellulosic Ethanol Program, Institute of Nuclear Energy Research, Taoyuan, Taiwan, ROC.
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28
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Ling H, Cheng K, Ge J, Ping W. Statistical optimization of xylitol production from corncob hemicellulose hydrolysate by Candida tropicalis HDY-02. N Biotechnol 2011; 28:673-8. [DOI: 10.1016/j.nbt.2010.05.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2009] [Revised: 04/19/2010] [Accepted: 05/04/2010] [Indexed: 10/19/2022]
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29
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García-Diéguez C, Salgado JM, Roca E, Domínguez JM. Kinetic modelling of the sequential production of lactic acid and xylitol from vine trimming wastes. Bioprocess Biosyst Eng 2011; 34:869-78. [DOI: 10.1007/s00449-011-0537-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Accepted: 03/16/2011] [Indexed: 10/18/2022]
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30
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Huang CF, Jiang YF, Guo GL, Hwang WS. Development of a yeast strain for xylitol production without hydrolysate detoxification as part of the integration of co-product generation within the lignocellulosic ethanol process. BIORESOURCE TECHNOLOGY 2011; 102:3322-9. [PMID: 21095119 DOI: 10.1016/j.biortech.2010.10.111] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2010] [Revised: 10/20/2010] [Accepted: 10/21/2010] [Indexed: 05/24/2023]
Abstract
The present study verified an applicable technology of xylitol bioconversion as part of the integration of co-product generation within second-generation bioethanol processes. A newly isolated yeast strain, Candida tropicalis JH030, was shown to have a capacity for xylitol production from hemicellulosic hydrolysate without detoxification. The yeast gives a promising xylitol yield of 0.71 g(p) g(s)(-1) from non-detoxified rice straw hydrolysate that had been prepared by the dilute acid pretreatment under severe conditions. The yeast's capacity was also found to be practicable with various other raw materials, such as sugarcane bagasse, silvergrass, napiergrass and pineapple peel. The lack of a need to hydrolysate detoxification enhances the potential of this newly isolated yeast for xylitol production and this, in turn, has the capacity to improve economics of lignocellulosic ethanol production.
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Affiliation(s)
- Chiung-Fang Huang
- Cellulosic Ethanol Project, Institute of Nuclear Energy Research, Taoyuan County, Taiwan, ROC
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31
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Ji XJ, Huang H, Nie ZK, Qu L, Xu Q, Tsao GT. Fuels and chemicals from hemicellulose sugars. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2011; 128:199-224. [PMID: 22249365 DOI: 10.1007/10_2011_124] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Industrial processes of lignocellulosic material have made use of only the hexose component of the cellulose fraction. Pentoses and some minor hexoses present in the hemicellulose fraction, which may represent as much as 40% of lignocellulosic biomass, have in most cases been wasted. The lack of good methods for utilization of hemicellulose sugars is a key obstacle hindering the development of lignocellulose-based ethanol and other biofuels. In this chapter, we focus on the utilization of hemicellulose sugars, the structure of hemicellulose and its hydrolysis, and the biochemistry and process technology involved in their conversion to valuable fuels and chemicals.
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Affiliation(s)
- Xiao-Jun Ji
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, No. 5 Xinmofan Rd., Nanjing, 210009, China
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de Arruda PV, de Cássia Lacerda Brambilla Rodrigu R, da Silva DDV, de Almeida Felipe MDG. Evaluation of hexose and pentose in pre-cultivation of Candida guilliermondii on the key enzymes for xylitol production in sugarcane hemicellulosic hydrolysate. Biodegradation 2010; 22:815-22. [DOI: 10.1007/s10532-010-9397-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Accepted: 07/21/2010] [Indexed: 10/19/2022]
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33
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The Optimization of Dilute Acid Hydrolysis of Cotton Stalk in Xylose Production. Appl Biochem Biotechnol 2010; 163:313-25. [DOI: 10.1007/s12010-010-9040-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2009] [Accepted: 07/12/2010] [Indexed: 11/29/2022]
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Zhang YHP, Sun J, Zhong JJ. Biofuel production by in vitro synthetic enzymatic pathway biotransformation. Curr Opin Biotechnol 2010; 21:663-9. [PMID: 20566280 DOI: 10.1016/j.copbio.2010.05.005] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2010] [Revised: 05/18/2010] [Accepted: 05/27/2010] [Indexed: 10/19/2022]
Abstract
Cell-free synthetic pathway biotransformation (SyPaB) is the implementation of complicated biochemical reactions by in vitro assembling a number of enzymes or their complexes and coenzymes. Assembly of numerous enzymes without cellular membrane, gene regulation, or undesired pathway can circumvent some of the obstacles to modifying living microorganisms. Several synthetic pathways for the production of liquid biofuels--alcohols and hydrocarbon precursors (polyols) as well as gaseous biofuel--hydrogen have been presented. The present constraints to SyPaB include the lack of stable enzymes as Lego-like building blocks, the different optimal reaction conditions for individual enzyme, and the use of costly labile coenzymes. It is expected that high-yield SyPaB will be an important platform for producing low-cost biofuels and biochemicals.
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Affiliation(s)
- Y-H Percival Zhang
- Biological Systems Engineering Department, 210-A Seitz Hall, Blacksburg, VA 24061, USA.
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35
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Integrated production of xylitol and ethanol using corncob. Appl Microbiol Biotechnol 2010; 87:411-7. [PMID: 20424835 DOI: 10.1007/s00253-010-2612-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2010] [Revised: 04/06/2010] [Accepted: 04/09/2010] [Indexed: 10/19/2022]
Abstract
Xylitol production from corncob hemicellulose is a popular process in China. Microbial conversion of xylose to xylitol, as a biological process with many advantages, has drawn increasing attention. As a by-product from the manufacturing of xylitol, corncob cellulosic residues are produced in very large amounts and represent an environmental problem. As a result, considering the large amount of xylitol production in China, the conversion of corncob cellulosic residues has become a widespread issue having to be tackled. After the hemicellulose in corncob has been hydrolyzed for xylitol production, the corncob cellulosic residue is porous and can easily be hydrolyzed by cellulases into glucose and further converted to ethanol, another high-added-value chemical. Based on the latest technology advancements in xylitol, cellulase, and ethanol production, the integrated production of ethanol from corncob cellulosic residues appears as a promising way to improve the profit of the whole xylitol production process.
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Cheng KK, Zhang JA, Ling HZ, Ping WX, Huang W, Ge JP, Xu JM. Optimization of pH and acetic acid concentration for bioconversion of hemicellulose from corncobs to xylitol by Candida tropicalis. Biochem Eng J 2009. [DOI: 10.1016/j.bej.2008.09.012] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Sampaio FC, de Faria JT, Coimbra JSR, Lopes Passos FM, Converti A, Minin LA. Xylose reductase activity in Debaryomyces hansenii UFV-170 cultivated in semi-synthetic medium and cotton husk hemicellulose hydrolyzate. Bioprocess Biosyst Eng 2009; 32:747-54. [PMID: 19184115 DOI: 10.1007/s00449-009-0299-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2008] [Accepted: 01/09/2009] [Indexed: 11/29/2022]
Abstract
To develop a new enzymatic xylose-to-xylitol conversion, deeper knowledge on the regulation of xylose reductase (XR) is needed. To this purpose, a new strain of Debaryomyces hansenii (UFV-170), which proved a promising xylitol producer, was cultivated in semi-synthetic media containing different carbon sources, specifically three aldo-hexoses (D-glucose, D-galactose and D-mannose), a keto-hexose (D-fructose), a keto-pentose (D-xylose), three aldo-pentoses (D-arabinose, L-arabinose and D-ribose), three disaccharides (maltose, lactose and sucrose) and a pentitol (xylitol). The best substrate was lactose on which cell concentration reached about 20 g l(-1) dry weight (DW), while the highest specific growth rates (0.58-0.61 h(-1)) were detected on lactose, D-mannose, D-glucose and D-galactose. The highest specific activity of XR (0.24 U mg(-1)) was obtained in raw extracts of cells grown on D-xylose and harvested in the stationary growth phase. When grown on cotton husk hemicellulose hydrolyzates, cells exhibited XR activities five to seven times higher than on semi-synthetic media.
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Affiliation(s)
- Fábio Coelho Sampaio
- Food Technology Department, Federal University of Viçosa, Viçosa, Minas Gerais 36571-000, Brazil
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Sampaio FC, de Faria JT, Passos FML, Converti A, Minin LA. Optimal activity and thermostability of xylose reductase from Debaryomyces hansenii UFV-170. J Ind Microbiol Biotechnol 2008; 36:293-300. [PMID: 19037674 DOI: 10.1007/s10295-008-0498-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2008] [Accepted: 10/23/2008] [Indexed: 11/26/2022]
Abstract
Xylose reductase (XR) is the enzyme that catalyzes the first step of xylose metabolism. Although XRs from various yeasts have been characterized, little is known about this enzyme in Debaryomyces hansenii. In the present study, response surface analysis was used to determine the optimal conditions for D. hansenii UFV-170 XR activity. The influence of pH and temperature, ranging from 4.0 to 8.0 and from 25 to 55 degrees C, respectively, was evaluated by a 2(2) central composite design face-centered. The F-test (ANOVA) and the Student's t test were performed to evaluate the statistical significance of the model and the regression coefficients, respectively. The NADPH-dependent XR activity varied from 0.502 to 2.53 U mL(-1), corresponding to 0.07-0.352 U mg(-1), whereas the NADH-dependent one was almost negligible. The model predicted with satisfactory correlation (R (2) = 0.940) maximum volumetric activity of 2.27 U mL(-1) and specific activity of 0.300 U mg(-1) at pH 5.3 and 39 degrees C, which were fairly confirmed by additional tests performed under these conditions. The enzyme proved very stable at low temperature (4 degrees C), keeping its activity almost entirely after 360 min, which corresponded to the half-time at 39 degrees C. On the other hand, at temperatures >or=50 degrees C it was lost almost completely after only 20 min.
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Affiliation(s)
- Fábio C Sampaio
- Department of Food Technology, Federal University of Viçosa, Av. P. H. Rolfs s/n, Viçosa, Minas Gerais, 36571-000, Brazil
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Role of Glycerol Addition on Xylose-to-Xylitol Bioconversion by Candida guilliermondii. Curr Microbiol 2008; 58:274-8. [DOI: 10.1007/s00284-008-9321-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2008] [Revised: 10/19/2008] [Accepted: 10/20/2008] [Indexed: 11/25/2022]
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Mussatto SI, Dragone G, Roberto IC. Kinetic Behavior of Candida guilliermondii Yeast during Xylitol Production from Brewerapos;s Spent Grain Hemicellulosic Hydrolysate. Biotechnol Prog 2008; 21:1352-6. [PMID: 16080723 DOI: 10.1021/bp0501118] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Brewer's spent grain, the main byproduct of breweries, was hydrolyzed with dilute sulfuric acid to produce a hemicellulosic hydrolysate (containing xylose as the main sugar). The obtained hydrolysate was used as cultivation medium by Candidaguilliermondii yeast in the raw form (containing 20 g/L xylose) and after concentration (85 g/L xylose), and the kinetic behavior of the yeast during xylitol production was evaluated in both media. Assays in semisynthetic media were also performed to compare the yeast performance in media without toxic compounds. According to the results, the kinetic behavior of the yeast cultivated in raw hydrolysate was as effective as in semisynthetic medium containing 20 g/L xylose. However, in concentrated hydrolysate medium, the xylitol production efficiency was 30.6% and 42.6% lower than in raw hydrolysate and semisynthetic medium containing 85 g/L xylose, respectively. In other words, the xylose-to-xylitol bioconversion from hydrolysate medium was strongly affected when the initial xylose concentration was increased; however, similar behavior did not occur from semisynthetic media. The lowest efficiency of xylitol production from concentrated hydrolysate can be attributed to the high concentration of toxic compounds present in this medium, resulting from the hydrolysate concentration process.
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Affiliation(s)
- Solange I Mussatto
- Departamento de Biotecnologia, Faculdade de Engenharia Química de Lorena, Rodovia Itajubá-Lorena km 74,5, CEP: 12600-970, Lorena/SP, Brazil.
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Liaw WC, Chang WS, Chen KP, Chen YF, Chen CS. Xylitol fermentation by Candida subtropicalis WF79 immobilized in polyacrylic hydrogel films. KOREAN J CHEM ENG 2008. [DOI: 10.1007/s11814-008-0178-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Canilha L, Carvalho W, Felipe MDGA, de Almeida e Silva JB. Xylitol production from wheat straw hemicellulosic hydrolysate: hydrolysate detoxification and carbon source used for inoculum preparation. Braz J Microbiol 2008; 39:333-6. [PMID: 24031226 PMCID: PMC3768398 DOI: 10.1590/s1517-838220080002000025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2007] [Revised: 12/08/2007] [Accepted: 02/19/2008] [Indexed: 11/24/2022] Open
Abstract
Wheat straw hemicellulosic hydrolysate was used for xylitol bioproduction. The use of a xylose-containing medium to grow the inoculum did not favor the production of xylitol in the hydrolysate, which was submitted to a previous detoxification treatment with 2.5% activated charcoal for optimized removal of inhibitory compounds.
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Affiliation(s)
- Larissa Canilha
- Universidade de São Paulo, Escola de Engenharia de Lorena, Departamento de Biotecnologia, Lorena, SP, Brasil
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Zhang YHP. Reviving the carbohydrate economy via multi-product lignocellulose biorefineries. J Ind Microbiol Biotechnol 2008; 35:367-375. [PMID: 18180967 DOI: 10.1007/s10295-007-0293-6] [Citation(s) in RCA: 222] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2007] [Accepted: 12/04/2007] [Indexed: 11/27/2022]
Abstract
Before the industrial revolution, the global economy was largely based on living carbon from plants. Now the economy is mainly dependent on fossil fuels (dead carbon). Biomass is the only sustainable bioresource that can provide sufficient transportation fuels and renewable materials at the same time. Cellulosic ethanol production from less costly and most abundant lignocellulose is confronted with three main obstacles: (1) high processing costs (dollars /gallon of ethanol), (2) huge capital investment (dollars approximately 4-10/gallon of annual ethanol production capacity), and (3) a narrow margin between feedstock and product prices. Both lignocellulose fractionation technology and effective co-utilization of acetic acid, lignin and hemicellulose will be vital to the realization of profitable lignocellulose biorefineries, since co-product revenues would increase the margin up to 6.2-fold, where all purified lignocellulose co-components have higher selling prices (> approximately 1.0/kg) than ethanol ( approximately 0.5/kg of ethanol). Isolation of large amounts of lignocellulose components through lignocellulose fractionation would stimulate R&D in lignin and hemicellulose applications, as well as promote new markets for lignin- and hemicellulose-derivative products. Lignocellulose resource would be sufficient to replace significant fractionations (e.g., 30%) of transportation fuels through liquid biofuels, internal combustion engines in the short term, and would provide 100% transportation fuels by sugar-hydrogen-fuel cell systems in the long term.
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Affiliation(s)
- Y-H Percival Zhang
- Biological Systems Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061, USA.
- Institute for Critical Technology and Applied Science (ICTAS), Virginia Polytechnic Institute and State University, Blacksburg, VA, 24061, USA.
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Lu X, Zhang Y, Yang J, Liang Y. Enzymatic Hydrolysis of Corn Stover after Pretreatment with Dilute Sulfuric Acid. Chem Eng Technol 2007. [DOI: 10.1002/ceat.200700035] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Agblevor FA, Hames BR, Schell D, Chum HL. Analysis of biomass sugars using a novel HPLC method. Appl Biochem Biotechnol 2007; 136:309-26. [PMID: 17625236 DOI: 10.1007/s12010-007-9028-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2006] [Revised: 11/30/1999] [Accepted: 04/12/2006] [Indexed: 11/29/2022]
Abstract
The precise quantitative analysis of biomass sugars is a very important step in the conversion of biomass feedstocks to fuels and chemicals. However, the most accurate method of biomass sugar analysis is based on the gas chromatography analysis of derivatized sugars either as alditol acetates or trimethylsilanes. The derivatization method is time consuming but the alternative high-performance liquid chromatography (HPLC) method cannot resolve most sugars found in biomass hydrolysates. We have demonstrated for the first time that by careful manipulation of the HPLC mobile phase, biomass monomeric sugars (arabinose, xylose, fructose, glucose, mannose, and galactose) can be analyzed quantitatively and there is excellent baseline resolution of all the sugars. This method was demonstrated for standard sugars, pretreated corn stover liquid and solid fractions. Our method can also be used to analyze dimeric sugars (cellobiose and sucrose).
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Affiliation(s)
- F A Agblevor
- Biological Systems Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA.
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Sampaio FC, Torre P, Passos FML, de Moraes CA, Perego P, Converti A. Influence of inhibitory compounds and minor sugars on xylitol production by Debaryomyces hansenii. Appl Biochem Biotechnol 2007; 136:165-82. [PMID: 17496338 DOI: 10.1007/bf02686021] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2006] [Revised: 04/09/2006] [Accepted: 04/20/2006] [Indexed: 10/22/2022]
Abstract
To obtain in-depth information on the overall metabolic behavior of the new good xylitol producer Debaryomyces hansenii UFV-170, batch bioconversions were carried out using semisynthetic media with compositions simulating those of typical acidic hemicellulose hydrolysates of sugarcane bagasse. For this purpose, we used media containing glucose (4.3-6.5 g/L), xylose (60.1-92.1 g/L), or arabinose (5.9-9.2 g/L), or binary or ternary mixtures of them in either the presence or absence of typical inhibitors of acidic hydrolysates, such as furfural (1.0-5.0 g/L), hydroxymethylfurfural (0.01- 0.30 g/L), acetic acid (0.5-3.0 g/L), and vanillin (0.5-3.0 g/L). D. hansenii exhibited a good tolerance to high sugar concentrations as well as to the presence of inhibiting compounds in the fermentation media. It was able to produce xylitol only from xylose, arabitol from arabinose, and no glucitol from glucose. Arabinose metabolization was incomplete, while ethanol was mainly produced from glucose and, to a lesser less extent, from xylose and arabinose. The results suggest potential application of this strain in xyloseto- xylitol bioconversion from complex xylose media from lignocellulosic materials.
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Affiliation(s)
- Fábio C Sampaio
- Department of Microbiology, Instituto de Biotecnologia Aplicada à Agropecuária, Federal University of Viçosa, Av. P. H. Rolfs s/n, 36570-000 Viçosa, Minas Gerais, Brazil
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Xylitol production in a bubble column bioreactor: Influence of the aeration rate and immobilized system concentration. Process Biochem 2007. [DOI: 10.1016/j.procbio.2006.07.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Mussatto SI, Silva CJSM, Roberto IC. Fermentation performance of Candida guilliermondii for xylitol production on single and mixed substrate media. Appl Microbiol Biotechnol 2006; 72:681-6. [PMID: 16541249 DOI: 10.1007/s00253-006-0372-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2005] [Revised: 02/05/2006] [Accepted: 02/07/2006] [Indexed: 10/24/2022]
Abstract
Semidefined media fermentation simulating the sugar composition of hemicellulosic hydrolysates (around 85 g l(-1) xylose, 17 g l(-1) glucose, and 9 g l(-1) arabinose) was investigated to evaluate the glucose and arabinose influence on xylose-to-xylitol bioconversion by Candida guilliermondii. The results revealed that glucose reduced the xylose consumption rate by 30%. Arabinose did not affect the xylose consumption but its utilization by the yeast was fully repressed by both glucose and xylose sugars. Arabinose was only consumed when it was used as a single carbon source. Xylitol production was best when glucose was not present in the fermentation medium. On the other hand, the arabinose favored the xylitol yield (which attained 0.74 g g(-1) xylose consumed) and it did not interfere with xylitol volumetric productivity (Q(P) = 0.85 g g(-1)), the value of which was similar to that obtained with xylose alone.
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Affiliation(s)
- Solange I Mussatto
- Departamento de Biotecnologia, Faculdade de Engenharia Química de Lorena, Rodovia Itajubá-Lorena, km 74,5, Cx. Postal 116, Cep: 12600-970 Lorena, SP, Brazil.
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Tamburini E, Bernardi T, Granini M, Vaccari G. Separation and quantitative determination of aldoses and alditols by over-pressured layer chromatography (OPLC). JPC-J PLANAR CHROMAT 2006. [DOI: 10.1556/jpc.19.2006.1.2] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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