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Hanko EKR, Valdehuesa KNG, Verhagen KJA, Chromy J, Stoney RA, Chua J, Yan C, Roubos JA, Schmitz J, Breitling R. Carboxylic acid reductase-dependent biosynthesis of eugenol and related allylphenols. Microb Cell Fact 2023; 22:238. [PMID: 37980525 PMCID: PMC10656918 DOI: 10.1186/s12934-023-02246-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 11/07/2023] [Indexed: 11/20/2023] Open
Abstract
BACKGROUND (Hydroxy)cinnamyl alcohols and allylphenols, including coniferyl alcohol and eugenol, are naturally occurring aromatic compounds widely utilised in pharmaceuticals, flavours, and fragrances. Traditionally, the heterologous biosynthesis of (hydroxy)cinnamyl alcohols from (hydroxy)cinnamic acids involved CoA-dependent activation of the substrate. However, a recently explored alternative pathway involving carboxylic acid reductase (CAR) has proven efficient in generating the (hydroxy)cinnamyl aldehyde intermediate without the need for CoA activation. In this study, we investigated the application of the CAR pathway for whole-cell bioconversion of a range of (hydroxy)cinnamic acids into their corresponding (hydroxy)cinnamyl alcohols. Furthermore, we sought to extend the pathway to enable the production of a variety of allylphenols and allylbenzene. RESULTS By screening the activity of several heterologously expressed enzymes in crude cell lysates, we identified the combination of Segniliparus rugosus CAR (SrCAR) and Medicago sativa cinnamyl alcohol dehydrogenase (MsCAD2) as the most efficient enzymatic cascade for the two-step reduction of ferulic acid to coniferyl alcohol. To optimise the whole-cell bioconversion in Escherichia coli, we implemented a combinatorial approach to balance the gene expression levels of SrCAR and MsCAD2. This optimisation resulted in a coniferyl alcohol yield of almost 100%. Furthermore, we extended the pathway by incorporating coniferyl alcohol acyltransferase and eugenol synthase, which allowed for the production of eugenol with a titre of up to 1.61 mM (264 mg/L) from 3 mM ferulic acid. This improvement in titre surpasses previous achievements in the field employing a CoA-dependent coniferyl alcohol biosynthesis pathway. Our study not only demonstrated the successful utilisation of the CAR pathway for the biosynthesis of diverse (hydroxy)cinnamyl alcohols, such as p-coumaryl alcohol, caffeyl alcohol, cinnamyl alcohol, and sinapyl alcohol, from their corresponding (hydroxy)cinnamic acid precursors but also extended the pathway to produce allylphenols, including chavicol, hydroxychavicol, and methoxyeugenol. Notably, the microbial production of methoxyeugenol from sinapic acid represents a novel achievement. CONCLUSION The combination of SrCAR and MsCAD2 enzymes offers an efficient enzymatic cascade for the production of a wide array of (hydroxy)cinnamyl alcohols and, ultimately, allylphenols from their respective (hydroxy)cinnamic acids. This expands the range of value-added molecules that can be generated using microbial cell factories and creates new possibilities for applications in industries such as pharmaceuticals, flavours, and fragrances. These findings underscore the versatility of the CAR pathway, emphasising its potential in various biotechnological applications.
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Affiliation(s)
- Erik K R Hanko
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Kris Niño G Valdehuesa
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Koen J A Verhagen
- dsm-firmenich, Science & Research, P.O. Box 1, Delft, 2600 MA, The Netherlands
| | - Jakub Chromy
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Ruth A Stoney
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Jeremy Chua
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Cunyu Yan
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK
| | - Johannes A Roubos
- dsm-firmenich, Science & Research, P.O. Box 1, Delft, 2600 MA, The Netherlands
| | - Joep Schmitz
- dsm-firmenich, Science & Research, P.O. Box 1, Delft, 2600 MA, The Netherlands
| | - Rainer Breitling
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK.
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Yiakoumetti A, Hanko EKR, Zou Y, Chua J, Chromy J, Stoney RA, Valdehuesa KNG, Connolly JA, Yan C, Hollywood KA, Takano E, Breitling R. Expanding flavone and flavonol production capabilities in Escherichia coli. Front Bioeng Biotechnol 2023; 11:1275651. [PMID: 37920246 PMCID: PMC10619664 DOI: 10.3389/fbioe.2023.1275651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 10/04/2023] [Indexed: 11/04/2023] Open
Abstract
Flavones and flavonols are important classes of flavonoids with nutraceutical and pharmacological value, and their production by fermentation with recombinant microorganisms promises to be a scalable and economically favorable alternative to extraction from plant sources. Flavones and flavonols have been produced recombinantly in a number of microorganisms, with Saccharomyces cerevisiae typically being a preferred production host for these compounds due to higher yields and titers of precursor compounds, as well as generally improved ability to functionally express cytochrome P450 enzymes without requiring modification to improve their solubility. Recently, a rapid prototyping platform has been developed for high-value compounds in E. coli, and a number of gatekeeper (2S)-flavanones, from which flavones and flavonols can be derived, have been produced to high titers in E. coli using this platform. In this study, we extended these metabolic pathways using the previously reported platform to produce apigenin, chrysin, luteolin and kaempferol from the gatekeeper flavonoids naringenin, pinocembrin and eriodictyol by the expression of either type-I flavone synthases (FNS-I) or type-II flavone synthases (FNS-II) for flavone biosynthesis, and by the expression of flavanone 3-dioxygenases (F3H) and flavonol synthases (FLS) for the production of the flavonol kaempferol. In our best-performing strains, titers of apigenin and kaempferol reached 128 mg L-1 and 151 mg L-1 in 96-DeepWell plates in cultures supplemented with an additional 3 mM tyrosine, though titers for chrysin (6.8 mg L-1) from phenylalanine, and luteolin (5.0 mg L-1) from caffeic acid were considerably lower. In strains with upregulated tyrosine production, apigenin and kaempferol titers reached 80.2 mg L-1 and 42.4 mg L-1 respectively, without the further supplementation of tyrosine beyond the amount present in the rich medium. Notably, the highest apigenin, chrysin and luteolin titers were achieved with FNS-II enzymes, suggesting that cytochrome P450s can show competitive performance compared with non-cytochrome P450 enzymes in prokaryotes for the production of flavones.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Rainer Breitling
- Manchester Institute of Biotechnology, School of Chemistry, Faculty of Science and Engineering, University of Manchester, Manchester, United Kingdom
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Bañares AB, Valdehuesa KNG, Ramos KRM, Nisola GM, Lee WK, Chung WJ. Correction to: A pH-responsive genetic sensor for the dynamic regulation of D-xylonic acid accumulation in Escherichia coli. Appl Microbiol Biotechnol 2020; 104:2273-2274. [PMID: 31950218 DOI: 10.1007/s00253-020-10362-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
In the published version, the y-axis data of Fig. 3c was incorrectly inserted (OD600 instead of D-xylonate (g L-1) and the x-axes of Figs. 3b, 3d, 3e and 3f ended at 48 h instead of 72 h. See the correct Fig. 3 below.
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Affiliation(s)
- Angelo B Bañares
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, 17058, Gyeonggi-do, Republic of Korea
| | - Kris Niño G Valdehuesa
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, 17058, Gyeonggi-do, Republic of Korea
| | - Kristine Rose M Ramos
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, 17058, Gyeonggi-do, Republic of Korea
| | - Grace M Nisola
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, 17058, Gyeonggi-do, Republic of Korea
| | - Won-Keun Lee
- Division of Bioscience and Bioinformatics, Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, 17058, Gyeonggi-do, Republic of Korea.
| | - Wook-Jin Chung
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, 17058, Gyeonggi-do, Republic of Korea.
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Bañares AB, Valdehuesa KNG, Ramos KRM, Nisola GM, Lee WK, Chung WJ. A pH-responsive genetic sensor for the dynamic regulation of D-xylonic acid accumulation in Escherichia coli. Appl Microbiol Biotechnol 2020; 104:2097-2108. [PMID: 31900554 DOI: 10.1007/s00253-019-10297-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 11/28/2019] [Accepted: 12/03/2019] [Indexed: 11/25/2022]
Abstract
The xylose oxidative pathway (XOP) is continuously gaining prominence as an alternative for the traditional pentose assimilative pathways in prokaryotes. It begins with the oxidation of D-xylose to D-xylonic acid, which is further converted to α-ketoglutarate or pyruvate + glycolaldehyde through a series of enzyme reactions. The persistent drawback of XOP is the accumulation of D-xylonic acid intermediate that causes culture media acidification. This study addresses this issue through the development of a novel pH-responsive synthetic genetic controller that uses a modified transmembrane transcription factor called CadCΔ. This genetic circuit was tested for its ability to detect extracellular pH and to control the buildup of D-xylonic acid in the culture media. Results showed that the pH-responsive genetic sensor confers dynamic regulation of D-xylonic acid accumulation, which adjusts with the perturbation of culture media pH. This is the first report demonstrating the use of a pH-responsive transmembrane transcription factor as a transducer in a synthetic genetic circuit that was designed for XOP. This may serve as a benchmark for the development of other genetic controllers for similar pathways that involve acidic intermediates.
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Affiliation(s)
- Angelo B Bañares
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, 17058, Gyeonggi-do, Republic of Korea
| | - Kris Niño G Valdehuesa
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, 17058, Gyeonggi-do, Republic of Korea
| | - Kristine Rose M Ramos
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, 17058, Gyeonggi-do, Republic of Korea
| | - Grace M Nisola
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, 17058, Gyeonggi-do, Republic of Korea
| | - Won-Keun Lee
- Division of Bioscience and Bioinformatics, Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, 17058, Gyeonggi-do, Republic of Korea.
| | - Wook-Jin Chung
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, 17058, Gyeonggi-do, Republic of Korea.
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Bañares AB, Valdehuesa KNG, Ramos KRM, Nisola GM, Lee WK, Chung WJ. Discovering a novel d-xylonate-responsive promoter: the PyjhI-driven genetic switch towards better 1,2,4-butanetriol production. Appl Microbiol Biotechnol 2019; 103:8063-8074. [DOI: 10.1007/s00253-019-10073-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 07/11/2019] [Accepted: 07/31/2019] [Indexed: 01/12/2023]
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López-Goñi I, Giner-Lamia J, Álvarez-Ordoñez A, Benitez-Páez A, Claessen D, Cortesao M, de Toro M, García-Ruano D, Granato ET, Kovács ÁT, Romalde JL, Sana TG, Sánchez-Angulo M, Sangari FJ, Smits WK, Sturm T, Thomassin JL, Valdehuesa KNG, Zapotoczna M. #EUROmicroMOOC: using Twitter to share trends in Microbiology worldwide. FEMS Microbiol Lett 2019; 366:5521206. [DOI: 10.1093/femsle/fnz141] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 06/19/2019] [Indexed: 11/12/2022] Open
Abstract
ABSTRACT
Twitter is one of the most popular social media networks that, in recent years, has been increasingly used by researchers as a platform to share science and discuss ongoing work. Despite its popularity, Twitter is not commonly used as a medium to teach science. Here, we summarize the results of #EUROmicroMOOC: the first worldwide Microbiology Massive Open Online Course taught in English using Twitter. Content analytics indicated that more than 3 million users saw posts with the hashtag #EUROmicroMOOC, which resulted in over 42 million Twitter impressions worldwide. These analyses demonstrate that free Microbiology MOOCs shared on Twitter are valuable educational tools that reach broad audiences throughout the world. We also describe our experience teaching an entire Microbiology course using Twitter and provide recommendations when using social media to communicate science to a broad audience.
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Affiliation(s)
- I López-Goñi
- Departamento de Microbiología y Parasitología, Universidad de Navarra, E-31080 Pamplona, Spain
| | - J Giner-Lamia
- Centro de Biotecnología y Genómica de Plantas (CBGP, UPM-INIA), Universidad Politécnica de Madrid (UPM), Campus Montegancedo-UPM, E-28223 Pozuelo de Alarcón, Madrid,Spain
- Departamento de Biotecnología-Biología Vegetal, ETSIAAB, UPM, Ciudad Universitaria, E-28040 Madrid, Spain
| | - A Álvarez-Ordoñez
- Departamento de Higiene y Tecnología de los Alimentos, Instituto de Ciencia y Tecnología de los Alimentos, Universidad de León, E-24071 León, Spain
| | - Alfonso Benitez-Páez
- Institute of Agrochemistry and Food Technology IATA-CSIC. C/Catedràtic Agustín Escardino Benlloch, 7, E-46980 Paterna-Valencia, Spain
| | - D Claessen
- Intitute of Biology, Leiden University, NL-2333 Leiden, the Netherlands
| | - M Cortesao
- German Aerospace Center (DLR), D-51147 Cologne, Germany
| | - M de Toro
- Fundacion Rioja Salud, E-26006 Logroño, Spain
| | - D García-Ruano
- Institute of Functional Biology and Genomics, USAL–CSIC, University of Salamanca, E-37002 Salamanca, Spain
| | - E T Granato
- Department of Zoology, University of Oxford, OX1 3SZ Oxford, United Kingdom
| | - Á T Kovács
- DTU Bioengineering, Bacterial Interactions and Evolution group,1 Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - J L Romalde
- Departamento de Microbiología y Parasitología, CIBUS-Facultad de Biología, Universidade de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - T G Sana
- Department of Microbiology and Immunology, Stanford University, Stanford, CA 94305, USA
| | - M Sánchez-Angulo
- Departamento de Producción Vegetal y Microbiología, University of Miguel Hernández, E-03202 Elche, Spain
| | - F J Sangari
- Instituto de Biomedicina y Biotecnología de Cantabria (IBBTEC) CSIC-University of Cantabria and Department of Molecular Biology, University of Cantabria, E-39011 Santander, Spain
| | - W K Smits
- Department of Medical Microbiology, Leiden University Medical Center, NL-2300 RC Leiden, the Netherlands
| | - T Sturm
- Cabrillo College, Aptos, CA 95003, USA
| | - J L Thomassin
- Biochemistry of Macromolecular Interactions Unit, Department of Structural Biology and Chemistry, Institut Pasteur, 28 rue du Dr. Roux, Paris F-75724 France
| | - K N G Valdehuesa
- Department of Energy Science and Technology, Myongji University, 03674 South Korea
| | - M Zapotoczna
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland
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Cabulong RB, Valdehuesa KNG, Bañares AB, Ramos KRM, Nisola GM, Lee WK, Chung WJ. Improved cell growth and biosynthesis of glycolic acid by overexpression of membrane-bound pyridine nucleotide transhydrogenase. J Ind Microbiol Biotechnol 2018; 46:159-169. [PMID: 30554290 DOI: 10.1007/s10295-018-2117-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 11/27/2018] [Indexed: 01/07/2023]
Abstract
The non-conventional D-xylose metabolism called the Dahms pathway which only requires the expression of at least three enzymes to produce pyruvate and glycolaldehyde has been previously engineered in Escherichia coli. Strains that rely on this pathway exhibit lower growth rates which were initially attributed to the perturbed redox homeostasis as evidenced by the lower intracellular NADPH concentrations during exponential growth phase. NADPH-regenerating systems were then tested to restore the redox homeostasis. The membrane-bound pyridine nucleotide transhydrogenase, PntAB, was overexpressed and resulted to a significant increase in biomass and glycolic acid titer and yield. Furthermore, expression of PntAB in an optimized glycolic acid-producing strain improved the growth and product titer significantly. This work demonstrated that compensating for the NADPH demand can be achieved by overexpression of PntAB in E. coli strains assimilating D-xylose through the Dahms pathway. Consequently, increase in biomass accumulation and product concentration was also observed.
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Affiliation(s)
- Rhudith B Cabulong
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 170-58, South Korea
| | - Kris Niño G Valdehuesa
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 170-58, South Korea
| | - Angelo B Bañares
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 170-58, South Korea
| | - Kristine Rose M Ramos
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 170-58, South Korea
| | - Grace M Nisola
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 170-58, South Korea
| | - Won-Keun Lee
- Division of Bioscience and Bioinformatics, Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 170-58, South Korea.
| | - Wook-Jin Chung
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 170-58, South Korea.
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Valdehuesa KNG, Ramos KRM, Nisola GM, Bañares AB, Cabulong RB, Lee WK, Liu H, Chung WJ. Everyone loves an underdog: metabolic engineering of the xylose oxidative pathway in recombinant microorganisms. Appl Microbiol Biotechnol 2018; 102:7703-7716. [PMID: 30003296 DOI: 10.1007/s00253-018-9186-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 06/19/2018] [Accepted: 06/20/2018] [Indexed: 11/25/2022]
Abstract
The D-xylose oxidative pathway (XOP) has recently been employed in several recombinant microorganisms for growth or for the production of several valuable compounds. The XOP is initiated by D-xylose oxidation to D-xylonolactone, which is then hydrolyzed into D-xylonic acid. D-Xylonic acid is then dehydrated to form 2-keto-3-deoxy-D-xylonic acid, which may be further dehydrated then oxidized into α-ketoglutarate or undergo aldol cleavage to form pyruvate and glycolaldehyde. This review introduces a brief discussion about XOP and its discovery in bacteria and archaea, such as Caulobacter crescentus and Haloferax volcanii. Furthermore, the current advances in the metabolic engineering of recombinant strains employing the XOP are discussed. This includes utilization of XOP for the production of diols, triols, and short-chain organic acids in Escherichia coli, Saccharomyces cerevisiae, and Corynebacterium glutamicum. Improving the D-xylose uptake, growth yields, and product titer through several metabolic engineering techniques bring some of these recombinant strains close to industrial viability. However, more developments are still needed to optimize the XOP pathway in the host strains, particularly in the minimization of by-product formation.
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Affiliation(s)
- Kris Niño G Valdehuesa
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 17058, Republic of Korea
| | - Kristine Rose M Ramos
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 17058, Republic of Korea
| | - Grace M Nisola
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 17058, Republic of Korea
| | - Angelo B Bañares
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 17058, Republic of Korea
| | - Rhudith B Cabulong
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 17058, Republic of Korea
| | - Won-Keun Lee
- Division of Bioscience and Bioinformatics, Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 17058, Republic of Korea
| | - Huaiwei Liu
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao, 266237, People's Republic of China.
| | - Wook-Jin Chung
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 17058, Republic of Korea.
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Valdehuesa KNG, Nisola GM, Lee SP, Anonas AV, Tuuguu E, Galera MM, Cho E, Chung WJ. Removal of odorous compounds emitted from a food-waste composting facility in Korea using a pilot-scale scrubber. J Environ Sci Health A Tox Hazard Subst Environ Eng 2018; 53:1094-1101. [PMID: 29842847 DOI: 10.1080/10934529.2018.1474586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Monitoring and control of odorous compound emissions have been enforced by the Korean government since 2005. One of the point sources for these emissions was from food waste composting facilities. In this study, a pilot-scale scrubber installed in a composting facility was evaluated for its performance in the removal of malodorous compounds. The exhaust stream contained ammonia and methylamine as the major odorants detected by the threshold odor test and various instrumental techniques (GC-FID, FPD, MS and HPLC/UV). For the scrubber operation, the column was randomly packed with polypropylene Hi-Rex 200, while aqueous sulfuric acid was selected as the scrubbing solution. To achieve 95% removal, the scrubber must be operated by using H2SO4 solution with pH at < 6.5, liquid to gas ratio > 4.5, gas loading rate < 1750 m3/m3-hr and contact time < 0.94 s. The scrubber performance was further evaluated by determining the mass transfer coefficients and then monitoring for 355 days of operation. The pilot-scale scrubber maintained > 95% ammonia and methylamine removal efficiencies despite the fluctuations in the inlet (from composting facility exhaust stream) concentration. The optimum operating conditions and scrubber performance indicators determined in this study provides a basis for the design of a plant-scale scrubber for treatment of composting facility gas emissions.
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Affiliation(s)
- Kris Niño G Valdehuesa
- a Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST) , Myongji University , Nam-dong, Cheoin-gu, Yongin-si , Gyeonggi-do , South Korea
| | - Grace M Nisola
- a Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST) , Myongji University , Nam-dong, Cheoin-gu, Yongin-si , Gyeonggi-do , South Korea
| | - Seong-Poong Lee
- a Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST) , Myongji University , Nam-dong, Cheoin-gu, Yongin-si , Gyeonggi-do , South Korea
| | - Alex V Anonas
- a Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST) , Myongji University , Nam-dong, Cheoin-gu, Yongin-si , Gyeonggi-do , South Korea
| | - Enkhdul Tuuguu
- a Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST) , Myongji University , Nam-dong, Cheoin-gu, Yongin-si , Gyeonggi-do , South Korea
| | - Melvin M Galera
- a Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST) , Myongji University , Nam-dong, Cheoin-gu, Yongin-si , Gyeonggi-do , South Korea
| | - Eulsaeng Cho
- a Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST) , Myongji University , Nam-dong, Cheoin-gu, Yongin-si , Gyeonggi-do , South Korea
| | - Wook-Jin Chung
- a Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST) , Myongji University , Nam-dong, Cheoin-gu, Yongin-si , Gyeonggi-do , South Korea
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Valdehuesa KNG, Ramos KRM, Moron LS, Lee I, Nisola GM, Lee WK, Chung WJ. Draft Genome Sequence of Newly Isolated Agarolytic Bacteria Cellulophaga omnivescoria sp. nov. W5C Carrying Several Gene Loci for Marine Polysaccharide Degradation. Curr Microbiol 2018. [PMID: 29536113 DOI: 10.1007/s00284-018-1467-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The continued research in the isolation of novel bacterial strains is inspired by the fact that native microorganisms possess certain desired phenotypes necessary for recombinant microorganisms in the biotech industry. Most studies have focused on the isolation and characterization of strains from marine ecosystems as they present a higher microbial diversity than other sources. In this study, a marine bacterium, W5C, was isolated from red seaweed collected from Yeosu, South Korea. The isolate can utilize several natural polysaccharides such as agar, alginate, carrageenan, and chitin. Genome sequence and comparative genomics analyses suggest that strain W5C belongs to a novel species of the Cellulophaga genus, from which the name Cellulophaga omnivescoria sp. nov. is proposed. Its genome harbors 3,083 coding sequences and 146 carbohydrate-active enzymes (CAZymes). Compared to other reported Cellulophaga species, the genome of W5C contained a higher proportion of CAZymes (4.7%). Polysaccharide utilization loci (PUL) for agar, alginate, and carrageenan were identified in the genome, along with other several putative PULs. These PULs are excellent sources for discovering novel hydrolytic enzymes and pathways with unique characteristics required for biorefinery applications, particularly in the utilization of marine renewable biomass. The type strain is JCM 32108T (= KCTC 13157BPT).
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Affiliation(s)
- Kris Niño G Valdehuesa
- Department of Energy Science and Technology, Energy and Environment Fusion Technology Center, Myongji University, Yongin, Gyeonggi-do, South Korea
| | - Kristine Rose M Ramos
- Department of Energy Science and Technology, Energy and Environment Fusion Technology Center, Myongji University, Yongin, Gyeonggi-do, South Korea
| | - Llewelyn S Moron
- Department of Energy Science and Technology, Energy and Environment Fusion Technology Center, Myongji University, Yongin, Gyeonggi-do, South Korea
- Biology Department, College of Science, De La Salle University, Manila, Philippines
| | - Imchang Lee
- School of Biological Sciences, Seoul National University, Seoul, South Korea
| | - Grace M Nisola
- Department of Energy Science and Technology, Energy and Environment Fusion Technology Center, Myongji University, Yongin, Gyeonggi-do, South Korea
| | - Won-Keun Lee
- Division of Bioscience and Bioinformatics, Myongji University, Yongin, Gyeonggi-do, South Korea
| | - Wook-Jin Chung
- Department of Energy Science and Technology, Energy and Environment Fusion Technology Center, Myongji University, Yongin, Gyeonggi-do, South Korea.
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Nisola GM, Valdehuesa KNG, Anonas AV, Ramos KRM, Lee WK, Chung WJ. Performance evaluation of poly-urethane foam packed-bed chemical scrubber for the oxidative absorption of NH 3 and H 2S gases. J Environ Sci Health A Tox Hazard Subst Environ Eng 2018; 53:25-32. [PMID: 29035626 DOI: 10.1080/10934529.2017.1366243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The feasibility of open-pore polyurethane (PU) foam as packing material for wet chemical scrubber was tested for NH3 and H2S removals. The foam is inexpensive, light-weight, highly porous (low pressure drop) and provides large surface area per unit volume, which are desirable properties for enhanced gas/liquid mass transfer. Conventional HCl/HOCl (for NH3) and NaOH/NaOCl (for H2S) scrubbing solutions were used to absorb and oxidize the gases. Assessment of the wet chemical scrubbers reveals that pH and ORP levels are important to maintain the gas removal efficiencies >95%. A higher re-circulation rate of scrubbing solutions also proved to enhance the performance of the NH3 and H2S columns. Accumulation of salts was confirmed by the gradual increase in total dissolved solids and conductivity values of scrubbing solutions. The critical elimination capacities at >95% gas removals were found to be 5.24 g NH3-N/m3-h and 17.2 g H2S-S/m3-h at an empty bed gas residence time of 23.6 s. Negligible pressure drops (< 4 mm H2O) after continuous operation demonstrate the suitability of PU as a practical packing material in wet chemical scrubbers for NH3 and H2S removals from high-volume dilute emissions.
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Affiliation(s)
- Grace M Nisola
- a Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST) , Myongji University , Nam-dong, Cheoin-gu, Yongin-si , Gyeonggi-do , Republic of Korea
| | - Kris Niño G Valdehuesa
- a Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST) , Myongji University , Nam-dong, Cheoin-gu, Yongin-si , Gyeonggi-do , Republic of Korea
| | - Alex V Anonas
- a Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST) , Myongji University , Nam-dong, Cheoin-gu, Yongin-si , Gyeonggi-do , Republic of Korea
| | - Kristine Rose M Ramos
- a Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST) , Myongji University , Nam-dong, Cheoin-gu, Yongin-si , Gyeonggi-do , Republic of Korea
| | - Won-Keun Lee
- b Myongji University, Division of Bioscience and Bioinformatics , Yongin City , Gyeonggi-do , South Korea
| | - Wook-Jin Chung
- a Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST) , Myongji University , Nam-dong, Cheoin-gu, Yongin-si , Gyeonggi-do , Republic of Korea
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Ramos KRM, Valdehuesa KNG, Maza PAMM, Nisola GM, Lee WK, Chung WJ. Overexpression and characterization of a novel α-neoagarobiose hydrolase and its application in the production of D-galactonate from Gelidium amansii. Process Biochem 2017. [DOI: 10.1016/j.procbio.2017.08.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Ramos KRM, Valdehuesa KNG, Nisola GM, Lee WK, Chung WJ. Identification and characterization of a thermostable endolytic β-agarase Aga2 from a newly isolated marine agarolytic bacteria Cellulophaga omnivescoria W5C. N Biotechnol 2017; 40:261-267. [PMID: 28962879 DOI: 10.1016/j.nbt.2017.09.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 08/22/2017] [Accepted: 09/25/2017] [Indexed: 12/21/2022]
Abstract
Research on the enzymatic breakdown of seaweed-derived agar has recently gained attention due to the progress in green technologies for marine biomass utilization. The enzymes known as agarases catalyze the cleavage of glycosidic bonds within the polysaccharide. In this study, a new β-agarase, Aga2, was identified from Cellulophaga omnivescoria W5C. Aga2 is one of four putative agarases from the W5C genome, and it belongs to the glycoside hydrolase 16 family. It was shown to be exclusive to the Cellulophaga genus. Agarase activity assays showed that Aga2 is an endolytic-type β-agarase that produces tetrameric and hexameric neoagaro-oligosaccharides, with optimum activity at 45°C and pH 8.0. Zinc ions slightly enhanced its activity while manganese ions had inhibitory effects even at very low concentrations. Aga2 has a Km of 2.59mgmL-1 and Vmax of 275.48Umg-1. The Kcat is 1.73×102s-1, while the Kcat/Km is 8.04×106s-1M-1. Aga2 also showed good thermostability at 45°C and above, and retained >90% of its activity after repeated freeze-thaw cycles. Bioinformatic analysis of its amino acid sequence revealed that intrinsic properties of the protein (e.g. presence of certain dipeptides and the relative volume occupied by aliphatic amino acids) and tertiary structural elements (e.g. presence of salt bridges, hydrophobic interactions and H-bonding) contributed to its thermostability.
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Affiliation(s)
- Kristine Rose M Ramos
- Energy and Environment Fusion Technology Center (E(2)FTC), Department of Energy Science and Technology (DEST), Myongji University, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Kris Niño G Valdehuesa
- Energy and Environment Fusion Technology Center (E(2)FTC), Department of Energy Science and Technology (DEST), Myongji University, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Grace M Nisola
- Energy and Environment Fusion Technology Center (E(2)FTC), Department of Energy Science and Technology (DEST), Myongji University, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Won-Keun Lee
- Division of Bioscience and Bioinformatics, Myongji University, Yongin-si, Gyeonggi-do, Republic of Korea.
| | - Wook-Jin Chung
- Energy and Environment Fusion Technology Center (E(2)FTC), Department of Energy Science and Technology (DEST), Myongji University, Yongin-si, Gyeonggi-do, Republic of Korea.
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Cabulong RB, Valdehuesa KNG, Ramos KRM, Nisola GM, Lee WK, Lee CR, Chung WJ. Enhanced yield of ethylene glycol production from d-xylose by pathway optimization in Escherichia coli. Enzyme Microb Technol 2016; 97:11-20. [PMID: 28010767 DOI: 10.1016/j.enzmictec.2016.10.020] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Revised: 10/07/2016] [Accepted: 10/30/2016] [Indexed: 12/01/2022]
Abstract
The microbial production of renewable ethylene glycol (EG) has been gaining attention recently due to its growing importance in chemical and polymer industries. EG has been successfully produced biosynthetically from d-xylose through several novel pathways. The first report on EG biosynthesis employed the Dahms pathway in Escherichia coli wherein 71% of the theoretical yield was achieved. This report further improved the EG yield by implementing metabolic engineering strategies. First, d-xylonic acid accumulation was reduced by employing a weak promoter which provided a tighter control over Xdh expression. Second, EG yield was further improved by expressing the YjgB, which was identified as the most suitable aldehyde reductase endogenous to E. coli. Finally, cellular growth, d-xylose consumption, and EG yield were further increased by blocking a competing reaction. The final strain (WTXB) was able to reach up to 98% of the theoretical yield (25% higher as compared to the first study), the highest reported value for EG production from d-xylose.
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Affiliation(s)
- Rhudith B Cabulong
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E(2)FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 170-58, South Korea
| | - Kris Niño G Valdehuesa
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E(2)FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 170-58, South Korea
| | - Kristine Rose M Ramos
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E(2)FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 170-58, South Korea
| | - Grace M Nisola
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E(2)FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 170-58, South Korea
| | - Won-Keun Lee
- Division of Bioscience and Bioinformatics, Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 170-58, South Korea
| | - Chang Ro Lee
- Division of Bioscience and Bioinformatics, Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 170-58, South Korea
| | - Wook-Jin Chung
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E(2)FTC), Myongji University, Myongji-ro 116, Cheoin-gu, Yongin, Gyeonggi-do, 170-58, South Korea.
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Valdehuesa KNG, Lee WK, Ramos KRM, Cabulong RB, Choi J, Liu H, Nisola GM, Chung WJ. Identification of aldehyde reductase catalyzing the terminal step for conversion of xylose to butanetriol in engineered Escherichia coli. Bioprocess Biosyst Eng 2015; 38:1761-72. [PMID: 26048478 DOI: 10.1007/s00449-015-1417-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 05/18/2015] [Indexed: 12/19/2022]
Abstract
Biosynthetic pathways for the production of biofuels often rely on inherent aldehyde reductases (ALRs) of the microbial host. These native ALRs play vital roles in the success of the microbial production of 1,3-propanediol, 1,4-butanediol, and isobutanol. In the present study, the main ALR for 1,2,4-butanetriol (BT) production in Escherichia coli was identified. Results of real-time PCR analysis for ALRs in EWBT305 revealed the increased expression of adhP, fucO, adhE, and yqhD genes during BT production. The highest increase of expression was observed up to four times in yqhD. Singular deletion of adhP, fucO, or adhE gene showed marginal differences in BT production compared to that of the parent strain, EWBT305. Remarkably, yqhD gene deletion (KBTA4 strain) almost completely abolished BT production while its re-introduction (wild-type gene with its native promoter) on a low copy plasmid restored 75 % of BT production (KBTA4-2 strain). This suggests that yqhD gene is the main ALR of the BT pathway. In addition, KBTA4 showed almost no NADPH-dependent ALR activity, but was also restored upon re-introduction of the yqhD gene (KBTA4-2 strain). Therefore, the required ALR activity to complete the BT pathway was mainly contributed by YqhD. Increased gene expression and promiscuity of YqhD were both found essential factors to render YqhD as the key ALR for the BT pathway.
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Affiliation(s)
- Kris Niño G Valdehuesa
- Department of Energy Science and Technology (DEST), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Yongin City, Gyeonggi-do, Republic of Korea
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Ramos KRM, Valdehuesa KNG, Liu H, Nisola GM, Lee WK, Chung WJ. Combining De Ley-Doudoroff and methylerythritol phosphate pathways for enhanced isoprene biosynthesis from D-galactose. Bioprocess Biosyst Eng 2014; 37:2505-13. [PMID: 24928200 DOI: 10.1007/s00449-014-1228-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 05/25/2014] [Indexed: 01/17/2023]
Abstract
An engineered Escherichia coli strain was developed for enhanced isoprene production using D-galactose as substrate. Isoprene is a valuable compound that can be biosynthetically produced from pyruvate and glyceraldehyde-3-phosphate (G3P) through the methylerythritol phosphate pathway (MEP). The Leloir and De Ley-Doudoroff (DD) pathways are known existing routes in E. coli that can supply the MEP precursors from D-galactose. The DD pathway was selected as it is capable of supplying equimolar amounts of pyruvate and G3P simultaneously. To exclusively direct D-galactose toward the DD pathway, an E. coli ΔgalK strain with blocked Leloir pathway was used as the host. To obtain a fully functional DD pathway, a dehydrogenase encoding gene (gld) was recruited from Pseudomonas syringae to catalyze D-galactose conversion to D-galactonate. Overexpressions of endogenous genes known as MEP bottlenecks, and a heterologous gene, were conducted to enhance and enable isoprene production, respectively. Growth test confirmed a functional DD pathway concomitant with equimolar generation of pyruvate and G3P, in contrast to the wild-type strain where G3P was limiting. Finally, the engineered strain with combined DD-MEP pathway exhibited the highest isoprene production. This suggests that the equimolar pyruvate and G3P pools resulted in a more efficient carbon flux toward isoprene production. This strategy provides a new platform for developing improved isoprenoid producing strains through the combined DD-MEP pathway.
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Affiliation(s)
- Kristine Rose M Ramos
- Department of Energy and Biotechnology (DEB), Energy and Environment Fusion Technology Center (E2FTC), Myongji University, 116 Myongji-ro, Cheoin-gu, Yongin-si, Gyeonggi-do, 449-728, Republic of Korea
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Liu H, Valdehuesa KNG, Ramos KRM, Nisola GM, Lee WK, Chung WJ. L-arabonate and D-galactonate production by expressing a versatile sugar dehydrogenase in metabolically engineered Escherichia coli. Bioresour Technol 2014; 159:455-459. [PMID: 24713235 DOI: 10.1016/j.biortech.2014.03.056] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Revised: 03/08/2014] [Accepted: 03/13/2014] [Indexed: 06/03/2023]
Abstract
The production of L-arabonate and D-galactonate employing a versatile l-arabinose dehydrogenase (AraDH) from Azospirillum brasilense is presented. The promiscuity of AraDH is manifested by its appreciable activity towards L-arabinose and D-galactose as substrates, and NAD(+) and NADP(+) as cofactors. The AraDH was introduced into an engineered Escherichia coli with inactive L-arabinose or D-galactose metabolism, resulting in strains EMA2 and EWG4, respectively. EMA2 produced 43.9 g L(-1)L-arabonate with a productivity of 1.22 g L(-1)h(-1) and 99.1% (mol/mol) yield. After methanol precipitation, 92.6% of L-arabonate potassium salt was recovered with a purity of 88.8%. Meanwhile, EWG4 produced 24.0 g L(-1)D-galactonate, which is 36% higher than that of the strain carrying the specific d-galactose dehydrogenase. Overall results reveal that the versatility of AraDH to efficiently catalyze the formation of L-arabonate and D-galactonate could be a useful tool in advancing industrial viability for sugar acids production.
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Affiliation(s)
- Huaiwei Liu
- Energy and Environment Fusion Technology Center (E(2)FTC), Department of Energy and Biotechnology (DEB), Myongji University, Yongin-si, Gyeonggi-do 449-728, Republic of Korea
| | - Kris Niño G Valdehuesa
- Energy and Environment Fusion Technology Center (E(2)FTC), Department of Energy and Biotechnology (DEB), Myongji University, Yongin-si, Gyeonggi-do 449-728, Republic of Korea
| | - Kristine Rose M Ramos
- Energy and Environment Fusion Technology Center (E(2)FTC), Department of Energy and Biotechnology (DEB), Myongji University, Yongin-si, Gyeonggi-do 449-728, Republic of Korea
| | - Grace M Nisola
- Energy and Environment Fusion Technology Center (E(2)FTC), Department of Energy and Biotechnology (DEB), Myongji University, Yongin-si, Gyeonggi-do 449-728, Republic of Korea
| | - Won-Keun Lee
- Division of Bioscience and Bioinformatics, Myongji University, Yongin-si, Gyeonggi-do 449-728, Republic of Korea
| | - Wook-Jin Chung
- Energy and Environment Fusion Technology Center (E(2)FTC), Department of Energy and Biotechnology (DEB), Myongji University, Yongin-si, Gyeonggi-do 449-728, Republic of Korea.
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Valdehuesa KNG, Liu H, Ramos KRM, Park SJ, Nisola GM, Lee WK, Chung WJ. Direct bioconversion of d-xylose to 1,2,4-butanetriol in an engineered Escherichia coli. Process Biochem 2014. [DOI: 10.1016/j.procbio.2013.10.002] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Liu H, Sun Y, Ramos KRM, Nisola GM, Valdehuesa KNG, Lee WK, Park SJ, Chung WJ. Combination of Entner-Doudoroff pathway with MEP increases isoprene production in engineered Escherichia coli. PLoS One 2013; 8:e83290. [PMID: 24376679 PMCID: PMC3869766 DOI: 10.1371/journal.pone.0083290] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Accepted: 11/11/2013] [Indexed: 11/18/2022] Open
Abstract
Embden-Meyerhof pathway (EMP) in tandem with 2-C-methyl-D-erythritol 4-phosphate pathway (MEP) is commonly used for isoprenoid biosynthesis in E. coli. However, this combination has limitations as EMP generates an imbalanced distribution of pyruvate and glyceraldehyde-3-phosphate (G3P). Herein, four glycolytic pathways—EMP, Entner-Doudoroff Pathway (EDP), Pentose Phosphate Pathway (PPP) and Dahms pathway were tested as MEP feeding modules for isoprene production. Results revealed the highest isoprene production from EDP containing modules, wherein pyruvate and G3P were generated simultaneously; isoprene titer and yield were more than three and six times higher than those of the EMP module, respectively. Additionally, the PPP module that generates G3P prior to pyruvate was significantly more effective than the Dahms pathway, in which pyruvate production precedes G3P. In terms of precursor generation and energy/reducing-equivalent supply, EDP+PPP was found to be the ideal feeding module for MEP. These findings may launch a new direction for the optimization of MEP-dependent isoprenoid biosynthesis pathways.
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Affiliation(s)
- Huaiwei Liu
- Energy and Environment Fusion Technology Center, Department of Energy and Biotechnology, Myongji University, Cheoin-gu, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Yuanzhang Sun
- Energy and Environment Fusion Technology Center, Department of Energy and Biotechnology, Myongji University, Cheoin-gu, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Kristine Rose M Ramos
- Energy and Environment Fusion Technology Center, Department of Energy and Biotechnology, Myongji University, Cheoin-gu, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Grace M Nisola
- Energy and Environment Fusion Technology Center, Department of Energy and Biotechnology, Myongji University, Cheoin-gu, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Kris Niño G Valdehuesa
- Energy and Environment Fusion Technology Center, Department of Energy and Biotechnology, Myongji University, Cheoin-gu, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Won-Keun Lee
- Division of Bioscience and Bioinformatics, Myongji University, Cheoin-gu, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Si Jae Park
- Energy and Environment Fusion Technology Center, Department of Energy and Biotechnology, Myongji University, Cheoin-gu, Yongin-si, Gyeonggi-do, Republic of Korea
| | - Wook-Jin Chung
- Energy and Environment Fusion Technology Center, Department of Energy and Biotechnology, Myongji University, Cheoin-gu, Yongin-si, Gyeonggi-do, Republic of Korea
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Valdehuesa KNG, Liu H, Nisola GM, Chung WJ, Lee SH, Park SJ. Recent advances in the metabolic engineering of microorganisms for the production of 3-hydroxypropionic acid as C3 platform chemical. Appl Microbiol Biotechnol 2013; 97:3309-21. [DOI: 10.1007/s00253-013-4802-4] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Revised: 02/19/2013] [Accepted: 02/20/2013] [Indexed: 01/28/2023]
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Liu H, Ramos KRM, Valdehuesa KNG, Nisola GM, Lee WK, Chung WJ. Biosynthesis of ethylene glycol in Escherichia coli. Appl Microbiol Biotechnol 2012; 97:3409-17. [PMID: 23233208 DOI: 10.1007/s00253-012-4618-7] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Revised: 10/31/2012] [Accepted: 11/23/2012] [Indexed: 11/26/2022]
Abstract
Ethylene glycol (EG) is an important platform chemical with steadily expanding global demand. Its commercial production is currently limited to fossil resources; no biosynthesis route has been delineated. Herein, a biosynthesis route for EG production from D-xylose is reported. This route consists of four steps: D-xylose → D-xylonate → 2-dehydro-3-deoxy-D-pentonate → glycoaldehyde → EG. Respective enzymes, D-xylose dehydrogenase, D-xylonate dehydratase, 2-dehydro-3-deoxy-D-pentonate aldolase, and glycoaldehyde reductase, were assembled. The route was implemented in a metabolically engineered Escherichia coli, in which the D-xylose → D-xylulose reaction was prevented by disrupting the D-xylose isomerase gene. The most efficient construct produced 11.7 g L(-1) of EG from 40.0 g L(-1) of D-xylose. Glycolate is a carbon-competing by-product during EG production in E. coli; blockage of glycoaldehyde → glycolate reaction was also performed by disrupting the gene encoding aldehyde dehydrogenase, but from this approach, EG productivity was not improved but rather led to D-xylonate accumulation. To channel more carbon flux towards EG than the glycolate pathway, further systematic metabolic engineering and fermentation optimization studies are still required to improve EG productivity.
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Affiliation(s)
- Huaiwei Liu
- Energy and Environment Fusion Technology Center (E2FTC), Department of Energy Science and Technology (DEST), Myongji University, Room 8807, Engineering College Building 2, San 38-2, Namdong, Cheoin-gu, Yongin, Gyeonggi 449-728, South Korea.
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Liu H, Valdehuesa KNG, Nisola GM, Ramos KRM, Chung WJ. High yield production of D-xylonic acid from D-xylose using engineered Escherichia coli. Bioresour Technol 2012; 115:244-248. [PMID: 21917451 DOI: 10.1016/j.biortech.2011.08.065] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2011] [Revised: 08/10/2011] [Accepted: 08/11/2011] [Indexed: 05/31/2023]
Abstract
An engineered Escherichia coli was constructed to produce D-xylonic acid, one of the top 30 high-value chemicals identified by US Department of Energy. The native pathway for D-xylose catabolism in E. coli W3110 was blocked by disrupting xylose isomerase (XI) and xylulose kinase (XK) genes. The native pathway for xylonic acid catabolism was also blocked by disrupting two genes both encoding xylonic acid dehydratase (yagE and yjhG). Through the introduction of a D-xylose dehydrogenase from Caulobacter crescentus, a D-xylonic acid producing E. coli was constructed. The recombinant E. coli produced up to 39.2 g L(-1) D-xylonic acid from 40 g L(-1) D-xylose in M9 minimal medium. The average productivity was as high as 1.09 g L(-1) h(-1) and no gluconic acid byproduct was produced. These results suggest that the engineered E. coli has a promising application for the industrial-scale production of D-xylonic acid.
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Affiliation(s)
- Huaiwei Liu
- Energy and Environment Fusion Technology Center (E2FTC), Myongji University, Yongin City, Gyeonggi Province, South Korea
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