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Cheng L, Peng L, Li X, Xu L, Chen J, Zhu Y, Wei Y, Wei X. Co-occurrence network and functional profiling of the bacterial community in the industrial pile fermentation of Qingzhuan tea: Understanding core functional bacteria. Food Chem 2024; 454:139658. [PMID: 38810451 DOI: 10.1016/j.foodchem.2024.139658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 05/07/2024] [Accepted: 05/11/2024] [Indexed: 05/31/2024]
Abstract
The distinct quality of Qingzhuan tea is greatly influenced by the bacterial community but was poorly characterized. Therefore, this study investigated the Co-occurrence network and functional profiling of the bacterial community, with special attention paid to core functional bacteria in the industrial pile fermentation. Microbiomics analysis indicated that Klebsiella and Pantoea dominated raw tea leaves, and were rapidly replaced by Pseudomonas in pile fermentation, but substituted mainly by Burkholderia and Saccharopolyspora in final fermented tea. Bacterial taxa were grouped into 7 modules with the dominant in module I, III, and IV, which were involved in flavor formation and biocontrol production. Functional profiling revealed that "penicillin and cephalosporin biosynthesis" increased in pile fermentation. Twelve bacterial genera were identified as core functional bacteria, in which Klebsiella, Pantoea, and Pseudomonas also dominated the pile fermentation. This work would provide theoretical basis for its chemical biofortification and quality improvement by controlling bacterial communities.
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Affiliation(s)
- Lizeng Cheng
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Lanlan Peng
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Xin Li
- Instrumental Analysis Center, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Lurong Xu
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Junhai Chen
- Hubei Zhaoliqiao Tea Factory Co. Ltd., Xianning 437318, PR China
| | - Yuzhi Zhu
- Hubei Qingzhuan Tea Industry Development Group Co. Ltd., Xianning 437000, PR China
| | - Yanxiang Wei
- Hubei Zhaoliqiao Tea Factory Co. Ltd., Xianning 437318, PR China
| | - Xinlin Wei
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, PR China.
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2
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Mbaye B, Wasfy RM, Alou MT, Borentain P, Gerolami R, Dufour JC, Million M. A catalog of ethanol-producing microbes in humans. Future Microbiol 2024; 19:697-714. [PMID: 38700288 PMCID: PMC11259083 DOI: 10.2217/fmb-2023-0250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 02/13/2024] [Indexed: 05/05/2024] Open
Abstract
Aim: Endogenous ethanol production emerges as a mechanism of nonalcoholic steatohepatitis, obesity, diabetes and auto-brewery syndrome. Methods: To identify ethanol-producing microbes in humans, we used the NCBI taxonomy browser and the PubMed database with an automatic query and manual verification. Results: 85 ethanol-producing microbes in human were identified. Saccharomyces cerevisiae, Candida and Pichia were the most represented fungi. Enterobacteriaceae was the most represented bacterial family with mainly Escherichia coli and Klebsiella pneumoniae. Species of the Lachnospiraceae and Clostridiaceae family, of the Lactobacillales order and of the Bifidobacterium genus were also identified. Conclusion: This catalog will help the study of ethanol-producing microbes in human in the pathophysiology, diagnosis, prevention and management of human diseases associated with endogenous ethanol production.
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Affiliation(s)
- Babacar Mbaye
- Aix Marseille Université, AP-HM, MEPHI, Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
| | - Reham Magdy Wasfy
- Aix Marseille Université, AP-HM, MEPHI, Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
| | - Maryam Tidjani Alou
- Aix Marseille Université, AP-HM, MEPHI, Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
| | - Patrick Borentain
- Department of Hepatology, La Timone University Hospital, AP-HM, Marseille, France
| | - Rene Gerolami
- Aix Marseille Université, AP-HM, MEPHI, Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
- Department of Hepatology, La Timone University Hospital, AP-HM, Marseille, France
| | - Jean-Charles Dufour
- INSERM, IRD, SESSTIM, Sciences Economiques & Sociales de la Santé & Traitement de l'Information Médicale, ISSPAM, Aix Marseille University, 13385 Marseille, France
- APHM, Hôpital de la Timone, Service Biostatistique et Technologies de l'Information et de la Communication, 13385 Marseille, France
| | - Matthieu Million
- Aix Marseille Université, AP-HM, MEPHI, Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
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Bakirdogen G, Selcuk E, Sahkulubey Kahveci EL, Ozbek T, Derman S, Kahveci MU. Fabrication of poly(β-amino ester) and hyaluronic acid based pH responsive nanocomplex as an antibiotic release system. Int J Biol Macromol 2024; 258:129060. [PMID: 38159698 DOI: 10.1016/j.ijbiomac.2023.129060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 12/18/2023] [Accepted: 12/24/2023] [Indexed: 01/03/2024]
Abstract
World Health Organization (WHO) warns about antimicrobial resistance (AMR) considered as the most serious threats to global health, food security, and development. There are various efforts for elimination of this serious issue. These efforts include education of individuals, new policies, development of new antimicrobials and new materials for effective delivery. Novel drug delivery systems with ability of local and on-demand delivery are one of the promising approaches for prevention of AMR. In this regard, a pH-responsive antibiotic delivery system based on pH-responsive poly(β-amino ester) (PBAE) and enzyme responsive hyaluronic acid (HA). The polymeric nanocomplexes were obtained via electrostatic complexation of PBAE and HA in the presence of a model antibiotics, colistin and vancomycin. The particle sizes at pH 7.4 were determined in the range of 131-730 nm and 120-400 nm by DLS and STEM, respectively. When pH was switched from 7.4 to 5.5, the hydrodynamic diameter increased 2.5-32 fold. The drug release performances were tested using FITC-labeled antibiotics via fluorescence spectroscopy. The nanocomplexes released the drugs more at pH 5.5 compared to pH 7.4. Antibacterial activity of the system was evaluated on various bacteria. The nanocomplex loaded with the antibiotics exhibited significantly greater efficacy against E. coli and S. aureus.
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Affiliation(s)
- Gulsah Bakirdogen
- Yildiz Technical University, Davutpasa Campus, Faculty of Chemical and Metallurgical Engineering, Department of Bioengineering, Esenler, 34220, Istanbul, Turkey
| | - Emine Selcuk
- Yildiz Technical University, Davutpasa Campus, Department of Molecular Biology and Genetics, General Biology, Esenler, 34220, Istanbul, Turkey
| | - Elif L Sahkulubey Kahveci
- Yildiz Technical University, Davutpasa Campus, Faculty of Chemical and Metallurgical Engineering, Department of Bioengineering, Esenler, 34220, Istanbul, Turkey
| | - Tulin Ozbek
- Yildiz Technical University, Davutpasa Campus, Department of Molecular Biology and Genetics, General Biology, Esenler, 34220, Istanbul, Turkey
| | - Serap Derman
- Yildiz Technical University, Davutpasa Campus, Faculty of Chemical and Metallurgical Engineering, Department of Bioengineering, Esenler, 34220, Istanbul, Turkey.
| | - Muhammet U Kahveci
- Istanbul Technical University, Faculty of Science and Letters, Department of Chemistry, Maslak, Sariyer, 34467, Istanbul, Turkey.
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4
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Kim B, Park AR, Song CW, Song H, Kim JC. Biological Control Efficacy and Action Mechanism of Klebsiella pneumoniae JCK-2201 Producing Meso-2,3-Butanediol Against Tomato Bacterial Wilt. Front Microbiol 2022; 13:914589. [PMID: 35910601 PMCID: PMC9333516 DOI: 10.3389/fmicb.2022.914589] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 06/15/2022] [Indexed: 11/13/2022] Open
Abstract
Bacterial wilt caused by Ralstonia solanacearum is a fatal disease that affects the production of tomatoes and many other crops worldwide. As an effective strategy to manage bacterial wilt, biological control agents using plant growth-promoting rhizobacteria (PGPR) are being developed. In this study, we screened 2,3-butanediol (BDO)-producing PGPR to control tomato bacterial wilt and investigated the action mechanism of the disease control agent. Of the 943 strains isolated from soil, Klebsiella pneumoniae strain JCK-2201 produced the highest concentration of 2,3-BDO. The culture broth of K. pneumoniae JCK-2201 did not show any direct activity on R. solanacearum in vitro, but a 100-fold dilution effectively controlled tomato bacterial wilt with a control value of 77% in vivo. Fermentation utilizing K. pneumoniae JCK-2201 was optimized to produce 48 g/L of meso-2,3-BDO, which is 50% of the sucrose conversion efficiency. In addition, the control efficacy and mechanism of meso-2,3-BDO produced by JCK-2201 in tomato bacterial wilt were determined by comparative analysis with Bacillus licheniformis DSM13 producing meso-2,3-BDO and B. licheniformis DSM13 ΔalsS that did not produce 2,3-BDO, as the step of converting pyruvate to α-acetolactate was omitted. Tomato seedlings treated with the K. pneumoniae JCK-2201 (500-fold dilution) and B. licheniformis DSM13 (100-fold dilution) culture broth produced meso-2,3-BDO that significantly reduced R. solanacearum-induced disease severity with control values of 55% and 63%, respectively. The formulated meso-2,3-BDO 9% soluble concentrate (SL; 1,000-fold dilution) showed 87% control against tomato bacterial wilt in the field condition. Klebsiella pneumoniae JCK-2201 and B. licheniformis DSM13 treatment induced the expression of plant defense marker genes, such as LePR1, LePR2, LePR5, LePR3, and PI-II, in the salicylic acid and jasmonic acid signaling pathways at 4 days after inoculation. These results show that 2,3-BDO-producing bacteria and 2,3-BDO are potential biological control agents that act through induction of resistance for controlling tomato bacterial wilt.
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Affiliation(s)
- Bora Kim
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Science, Chonnam National University, Gwangju, South Korea
| | - Ae Ran Park
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Science, Chonnam National University, Gwangju, South Korea
| | - Chan Woo Song
- Research and Department Center, GS Caltex Corporation, Daejeon, South Korea
| | - Hyohak Song
- Research and Department Center, GS Caltex Corporation, Daejeon, South Korea
| | - Jin-Cheol Kim
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Science, Chonnam National University, Gwangju, South Korea
- *Correspondence: Jin-Cheol Kim,
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5
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Zhang C, Zhou X, Tong T, Ge J. Acetic acid acting as a signaling molecule in the quorum sensing system increases 2,3-butanediol production in Saccharomyces cerevisiae. Prep Biochem Biotechnol 2021; 52:487-497. [PMID: 34431753 DOI: 10.1080/10826068.2021.1966800] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
2,3-Butanediol (2,3-BD) has been extensively used in chemical syntheses. This study aimed to explore acetic acid as a signaling molecule that activates a quorum sensing (QS) system to promote the production of 2,3-BD. The yield of 2,3-BD is proportional to the cell density. Saccharomyces cerevisiae W141 does not produce 2,3-BD when the cell density is lower than the threshold concentration (OD600 nm = 10 or cell density 4.4 × 108 CFU/mL). When 1.5 g/L acetic acid is added, the yield of 2,3-BD is 3.01 ± 0.04 g/L. Subsequently, S. cerevisiae W141 was cocultured with Acetobacter pasteurianus Huniang 1.01 under the optimal conditions, the acetic acid production was increased by 76.7% and 30.6% compared with the original strain and the strain cultivated with 1.5 g/L acetic acid, and the yield of 2,3-BD was increased by 81.9% and 3.3%, respectively. This difference is due to the activity of acetyl lactic acid synthase (ILV2) and 2,3-BD dehydrogenase (BDH1), as the relative expression of the ilv2 and bdh1 genes is increased. The results showed that the biosynthesis of 2,3-BD was regulated by acetic acid as a signaling molecule. S. cerevisiae is a promising host for producing 2,3-BD for industrial applications.
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Affiliation(s)
- Chi Zhang
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin, China.,Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin, China
| | - Xiaohang Zhou
- College of Basic Medicine, Mudanjiang Medical University, Mudanjiang, China
| | - Tianqi Tong
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin, China.,Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin, China
| | - Jingping Ge
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin, China.,Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin, China
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6
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Li Q, Jin Y, Jiang R, Xu Y, Zhang Y, Luo Y, Huang J, Wang K, Liu Z. Dynamic changes in the metabolite profile and taste characteristics of Fu brick tea during the manufacturing process. Food Chem 2020; 344:128576. [PMID: 33223295 DOI: 10.1016/j.foodchem.2020.128576] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 11/01/2020] [Accepted: 11/03/2020] [Indexed: 12/24/2022]
Abstract
Fu brick tea is a typical post-fermentation tea known for its special flavor and health benefits. Liquid chromatography-mass spectrometry, and sensory evaluation with multivariate analysis were used to characterize the dynamic changes in metabolite profile and taste characteristics. Seventy-one compounds were identified as critical metabolites, catechins, flavonoids, phenolic acids, terpenoids and others. During the manufacturing process, these compounds exhibited sharp fluctuations in content, the intensities of astringency, bitterness, and sourness of the tea materials reduced greatly, but the mellow intensity increased sharply. Several catechins and phenolic acids were positively related to the 'astringent', 'bitter', and 'sour' tastes attributes. The fungal genera, Aspergillus, Candida, unclassified_o_Hypocreales, unclassified_o_Saccharomycetales and Wallemia and the bacterial genus, Klebsiella, were identified as core functional microorganisms linked to the metabolic variations during the process. Overall, these findings provided a more comprehensive understanding of the formation of the sensory characteristics in Fu brick tea during the manufacturing process.
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Affiliation(s)
- Qin Li
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan 410128, PR China; National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan 410128, PR China; Collaborative Innovation Centre of Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan 410128, PR China.
| | - Youlan Jin
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan 410128, PR China.
| | - Ronggang Jiang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan 410128, PR China.
| | - Yongquan Xu
- Tea Research Institute Chinese Academy of Agricultural Sciences, Key Laboratory of Tea Biology and Resources Utilization, Ministry of Agriculture, 9 South Meiling Road, Hangzhou 310008, China.
| | - Yiyang Zhang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan 410128, PR China.
| | - Yu Luo
- Institute of Soil and Water Resources and Environmental Sciences, Zhejiang University, Hangzhou, Zhejiang 3100058, PR China.
| | - Jianan Huang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan 410128, PR China; Collaborative Innovation Centre of Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan 410128, PR China.
| | - Kunbo Wang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan 410128, PR China; National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan 410128, PR China; Collaborative Innovation Centre of Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan 410128, PR China.
| | - Zhonghua Liu
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan 410128, PR China; National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan 410128, PR China; Collaborative Innovation Centre of Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, Hunan 410128, PR China.
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7
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Mitrea L, Vodnar DC. Klebsiella pneumoniae-A Useful Pathogenic Strain for Biotechnological Purposes: Diols Biosynthesis under Controlled and Uncontrolled pH Levels. Pathogens 2019; 8:pathogens8040293. [PMID: 31835652 PMCID: PMC6963399 DOI: 10.3390/pathogens8040293] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/18/2019] [Accepted: 12/10/2019] [Indexed: 02/07/2023] Open
Abstract
Despite being a well-known human pathogen, Klebsiella pneumoniae plays a significant role in the biotechnology field, being considered as a microbial cell factory in terms of valuable chemical biosynthesis. In this work, Klebsiella pneumoniae DSMZ 2026 was investigated for its potential to biosynthesize 1,3-propanediol (PDO) and 2,3-butanediol (BDO) during batch fermentation under controlled and uncontrolled pH levels. The bacterial strain was cultivated at a bioreactor level, and it was inoculated in 2 L of specific mineral broth containing 50 g/L of glycerol as the main carbon source. The process was conducted under anaerobic conditions at 37 °C and 180 RPM (rotations per minute) for 24 h. The effect of pH oscillation on the biosynthesis of PDO and BDO was investigated. Samples were taken every 3 h and specific tests were performed: pH measurement, main substrate consumption, PDO and BDO production. The cell morphology was analyzed on both solid and liquid media. After 24 h of cultivation, the maximum concentrations of PDO and BDO were 28.63 ± 2.20 g/L and 18.10 ± 1.10 g/L when the pH value was maintained at 7. Decreased concentrations of PDO and BDO were achieved (11.08 ± 0.14 g/L and 7.35 ± 0.00 g/L, respectively) when the pH level was not maintained at constant values. Moreover, it was identified the presence of other metabolites (lactic, citric, and succinic acids) in the cultivation media at the beginning of the process, after 12 h and 24 h of cultivation.
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8
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Wu Q, Wei D, Dong L, Liu Y, Ren C, Liu Q, Chen C, Chen J, Pei J. Variation in the microbial community contributes to the improvement of the main active compounds of Magnolia officinalis Rehd. et Wils in the process of sweating. Chin Med 2019; 14:45. [PMID: 31660061 PMCID: PMC6806532 DOI: 10.1186/s13020-019-0267-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 10/10/2019] [Indexed: 12/25/2022] Open
Abstract
Background Magnolia officinalis Rehd. et Wils, commonly called Houpo, has been used for thousands of years in China as a traditional herbal medicine. The primary processing of Houpo requires sweating treatment, which is a special drying process and is considered to be an essential embodiment of high quality and genuine medicinal materials. The sweating of Houpo leads to peculiar changes in the microbial community structure and the content of main active substances (magnolol, honokiol, syringin and magnoflorine). Variation in the microbial community was considered the cause of the change in content of active substances of Houpo, although the microbial taxa responsible for the improvement of content remain unidentified. Methods In this study, we used MiSeq high-throughput sequencing methods for partial bacterial 16S rRNA and 18S rRNA gene sequences to compare the bacterial and fungal community structures at different timepoints in the process of sweating. The content of the main active substances (magnolol, honokiol, syringin and magnoflorine) were determined by high-performance liquid chromatography analysis to evaluate the effects of sweating. UPLC-Q-Extractive Orbitrap mass spectrometry (UPLC-QE Orbitrap MS) was used to detection of differential metabolites of unsweated Houpo before and after co-culture with core bacterial solutions. Results In this study, the total contents of magnolol (MG) and honokiol (HK) were significantly increased at 4 dp (dp for day PM sample), up to 3.75%, and the contents of syringin (SG) and magnoflorine (MF) were as high as 0.12% and 0.06%, respectively. Bacterial abundance and diversity were higher in the early stage (0 day-2 da; da for day AM sample) than in the later stage (4-5 dp), while fungal abundance was more obvious in the later stage than in the early stage. Positive correlation coefficients revealed that the relative abundance of Enterobacter (P < 0.05), Klebsiella (P < 0.05), Weissella (P < 0.05), Bacillus (P < 0.05) and Candida (P < 0.05) would be conducive to improving the quality of Houpo. Negative correlation coefficients revealed that the relative abundance of Actinomycetospora, Singulisphaera, Mucilaginibacter, Deinococcus, Gemmatirosa, Methylobacterium, Sphingomonas, Hymenobacter, Halomonas and Capnobotryella could be a potential antagonist for the decrease in the quality of Houpo. After co-culture of single core strain and unsweated Houpo, there was no significant difference in the four main active components, but there were other metabolites with significant difference. Conclusions Our findings reveal that sweating increased the content of the main active compounds, promoted the relative abundance of potentially beneficial microbes, decreased the abundance of potentially harmful microbes, the core functional genera group together, forming a core microbiome, these genera are dominant across the different stages of the sweating process and contribute to the quality development of the characteristics of Houpo. Meanwhile, this study presented a clear scope for potential beneficial microbes that improve the quality of Houpo.
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Affiliation(s)
- Qinahua Wu
- State Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu, 611137 Sichuan China.,2Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137 Sichuan China
| | - Dan Wei
- State Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu, 611137 Sichuan China.,2Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137 Sichuan China
| | - Linlin Dong
- 3Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700 China
| | - Yuping Liu
- State Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu, 611137 Sichuan China.,2Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137 Sichuan China
| | - Chaoxiang Ren
- State Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu, 611137 Sichuan China.,2Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137 Sichuan China
| | - Qianqian Liu
- State Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu, 611137 Sichuan China.,2Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137 Sichuan China
| | - Cuiping Chen
- State Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu, 611137 Sichuan China.,2Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137 Sichuan China
| | - Jiang Chen
- State Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu, 611137 Sichuan China.,2Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137 Sichuan China
| | - Jin Pei
- State Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu, 611137 Sichuan China.,2Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137 Sichuan China
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9
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Li Q, Li Y, Luo Y, Zhang Y, Chen Y, Lin H, Wang K, Huang J, Liu Z. Shifts in diversity and function of the bacterial community during the manufacture of Fu brick tea. Food Microbiol 2019; 80:70-76. [DOI: 10.1016/j.fm.2019.01.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 12/29/2018] [Accepted: 01/05/2019] [Indexed: 02/01/2023]
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10
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Recent Advances in the Metabolic Engineering of Klebsiella pneumoniae: A Potential Platform Microorganism for Biorefineries. BIOTECHNOL BIOPROC E 2019. [DOI: 10.1007/s12257-018-0346-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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11
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Li Q, Chai S, Li Y, Huang J, Luo Y, Xiao L, Liu Z. Biochemical Components Associated With Microbial Community Shift During the Pile-Fermentation of Primary Dark Tea. Front Microbiol 2018; 9:1509. [PMID: 30042750 PMCID: PMC6048958 DOI: 10.3389/fmicb.2018.01509] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 06/18/2018] [Indexed: 12/27/2022] Open
Abstract
Primary dark tea is used as raw material for compressed dark tea, such as Fu brick tea, Hei brick tea, Hua brick tea, and Qianliang tea. Pile-fermentation is the key process for the formation of the characteristic properties of primary dark tea, during which the microorganism plays an important role. In this study, the changes of major chemical compounds, enzyme activities, microbial diversity, and their correlations were explored during the pile-fermentation process. Our chemical and enzymatic analysis showed that the contents of the major compounds were decreased, while the activities of polyphenol oxidase, cellulase, and pectinase were increased during this process, except peroxidase activity that could not be generated from microbial communities in primary dark tea. The genera Cyberlindnera, Aspergillus, Uwebraunia, and Unclassified Pleosporales of fungus and Klebsiella, Lactobacillus of bacteria were predominant in the early stage of the process, but only Cyberlindnera and Klebsiella were still dominated in the late stage and maintained a relatively constant until the end of the process. The amino acid was identified as the important abiotic factor in shaping the microbial community structure of primary dark tea ecosystem. Network analysis revealed that the microbial taxa were grouped into five modules and seven keystone taxa were identified. Most of the dominant genera were mainly distributed into module III, which indicated that this module was important for the pile-fermentation process of primary dark tea. In addition, bidirectional orthogonal partial least squares (O2PLS) analysis revealed that the fungi made more contributions to the formation of the characteristic properties of primary dark tea than bacteria during the pile-fermentation process. Furthermore, 10 microbial genera including Cyberlindnera, Aspergillus, Eurotium, Uwebraunia, Debaryomyces, Lophiostoma, Peltaster, Klebsiella, Aurantimonas, and Methylobacterium were identified as core functional genera for the pile-fermentation of primary dark tea. This study provides useful information for improving our understanding on the formation mechanism of the characteristic properties of primary dark tea during the pile-fermentation process.
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Affiliation(s)
- Qin Li
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China.,Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, Hunan Agricultural University, Changsha, China.,National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, China.,Collaborative Innovation Centre of Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, China
| | - Shuo Chai
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China
| | - Yongdi Li
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China
| | - Jianan Huang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China.,Collaborative Innovation Centre of Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, China
| | - Yu Luo
- Institute of Soil and Water Resources and Environmental Sciences, Zhejiang University, Hangzhou, China
| | - Lizheng Xiao
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China.,National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, China
| | - Zhonghua Liu
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, China.,Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, Hunan Agricultural University, Changsha, China.,National Research Center of Engineering Technology for Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, China.,Collaborative Innovation Centre of Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, China
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12
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Moon SK, Kim DK, Park JM, Min J, Song H. Development of a semi-continuous two-stage simultaneous saccharification and fermentation process for enhanced 2,3-butanediol production by Klebsiella oxytoca. Lett Appl Microbiol 2018; 66:300-305. [PMID: 29315769 DOI: 10.1111/lam.12845] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 12/12/2017] [Accepted: 12/13/2017] [Indexed: 11/28/2022]
Abstract
Klebsiella oxytoca naturally produces a large amount of 2,3-butanediol (2,3-BD), a promising chemical with wide industrial applications, along with various by-products. Previously, we have developed a metabolically engineered K. oxytoca ΔldhA ΔpflB strain to reduce the formation of by-products. To improve 2,3-BD productivity and examine the stability of K. oxytoca ΔldhA ΔpflB strain for industrial application, a semi-continuous two-stage simultaneous saccharification and fermentation (STSSF) process was developed. The STSSF with the K. oxytoca ΔldhA ΔpflB mutant using cassava as a carbon source could produce 108 ± 3·73 g(2,3-BD) l-1 with a yield of 0·45 g(2,3-BD) g(glucose)-1 and a productivity of 3·00 g(2,3-BD) l-1 h-1 . No apparent changes in the final titre, yield and productivity of 2,3-BD were observed for up to 20 cycles of STSSF. Also, microbial contamination and spontaneous mutation of the host strain with potential detrimental effects on fermentation efficiency did not occur during the whole fermentation period. These results strongly underpin that the K. oxytoca ΔldhA ΔpflB mutant is stable and that the STSSF process is commercially exploitable. SIGNIFICANCE AND IMPACT OF THE STUDY There is growing interest in the production of 2,3-butanediol (2,3-BD) from renewable resources by microbial fermentation because of its wide applications to specialty and commodity chemical industries. Klebsiella oxytoca usually produces 2,3-BD as a major end product during the fermentation of carbohydrates. This is the first study to provide a high-efficiency simultaneous saccharification and 2,3-BD fermentation process. Also, this study proves the stability of a metabolically engineered 2,3-BD overproducing K. oxytoca strain for industrial application.
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Affiliation(s)
- S-K Moon
- Department of Bioprocess Engineering, Chonbuk National University, Jeonju, Korea.,Changhae Advanced Institute of Technology, Changhae Ethanol Co., Ltd., Jeonju, Korea
| | - D-K Kim
- Research and Development Center, GS Caltex Corporation, Daejeon, Korea
| | - J M Park
- Research and Development Center, GS Caltex Corporation, Daejeon, Korea
| | - J Min
- Department of Bioprocess Engineering, Chonbuk National University, Jeonju, Korea
| | - H Song
- Research and Development Center, GS Caltex Corporation, Daejeon, Korea
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13
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Park JH, Choi MA, Kim YJ, Kim YC, Chang YK, Jeong KJ. Engineering of Klebsiella oxytoca for production of 2,3-butanediol via simultaneous utilization of sugars from a Golenkinia sp. hydrolysate. BIORESOURCE TECHNOLOGY 2017; 245:1386-1392. [PMID: 28601394 DOI: 10.1016/j.biortech.2017.05.111] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 05/17/2017] [Accepted: 05/18/2017] [Indexed: 06/07/2023]
Abstract
The Klebsiella oxytoca was engineered to produce 2,3-butanediol (2,3-BDO) simultaneously utilizing glucose and galactose obtained from a Golenkinia sp. hydrolysate. For efficient uptake of galactose at a high concentration of glucose, Escherichia coli galactose permease (GalP) was introduced, and the expression of galP under a weak-strength promoter resulted in simultaneous consumption of galactose and glucose. Next, to improve the sugar consumption, a gene encoding methylglyoxal synthase (MgsA) known as an inhibitor of multisugar metabolism was deleted, and the mgsA-null mutant showed much faster consumption of both sugars than the wild-type strain did. Finally, we demonstrated that the engineered K. oxytoca could utilize sugar extracts from a Golenkinia sp. hydrolysate and successfully produces 2,3-BDO.
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Affiliation(s)
- Jong Hyun Park
- Department of Chemical and Biomolecular Engineering, BK21 Plus Program, KAIST, 291 Daehak-ro Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Min Ah Choi
- Department of Chemical and Biomolecular Engineering, BK21 Plus Program, KAIST, 291 Daehak-ro Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Yong Jae Kim
- Department of Chemical and Biomolecular Engineering, BK21 Plus Program, KAIST, 291 Daehak-ro Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Yeu-Chun Kim
- Department of Chemical and Biomolecular Engineering, BK21 Plus Program, KAIST, 291 Daehak-ro Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Yong Keun Chang
- Department of Chemical and Biomolecular Engineering, BK21 Plus Program, KAIST, 291 Daehak-ro Yuseong-gu, Daejeon 34141, Republic of Korea; Advanced Biomass R&D Center (ABC), 291 Daehak-ro Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Ki Jun Jeong
- Department of Chemical and Biomolecular Engineering, BK21 Plus Program, KAIST, 291 Daehak-ro Yuseong-gu, Daejeon 34141, Republic of Korea; Advanced Biomass R&D Center (ABC), 291 Daehak-ro Yuseong-gu, Daejeon 34141, Republic of Korea; Institutes for the BioCentury (KIB), KAIST, 291 Daehak-ro Yuseong-gu, Daejeon 34141, Republic of Korea.
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14
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Lee SJ, Thapa LP, Lee JH, Choi HS, Kim SB, Park C, Kim SW. Stimulation of 2,3-butanediol production by upregulation of alsR gene transcription level with acetate addition in Enterobacter aerogenes ATCC 29007. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.09.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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15
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Kim DK, Park JM, Song H, Chang YK. Kinetic modeling of substrate and product inhibition for 2,3-butanediol production by Klebsiella oxytoca. Biochem Eng J 2016. [DOI: 10.1016/j.bej.2016.06.021] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Chan S, Jantama SS, Kanchanatawee S, Jantama K. Process Optimization on Micro-Aeration Supply for High Production Yield of 2,3-Butanediol from Maltodextrin by Metabolically-Engineered Klebsiella oxytoca. PLoS One 2016; 11:e0161503. [PMID: 27603922 PMCID: PMC5014425 DOI: 10.1371/journal.pone.0161503] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Accepted: 08/05/2016] [Indexed: 11/19/2022] Open
Abstract
An optimization process with a cheap and abundant substrate is considered one of the factors affecting the price of the production of economical 2,3-Butanediol (2,3-BD). A combination of the conventional method and response surface methodology (RSM) was applied in this study. The optimized levels of pH, aeration rate, agitation speed, and substrate concentration (maltodextrin) were investigated to determine the cost-effectiveness of fermentative 2,3-BD production by metabolically-engineered Klebsiella oxytoca KMS005. Results revealed that pH, aeration rate, agitation speed, and maltodextrin concentration at levels of 6.0, 0.8 vvm, 400 rpm, and 150 g/L respectively were the optimal conditions. RSM also indicated that the agitation speed was the most influential parameter when either agitation and aeration interaction or agitation and substrate concentration interaction played important roles for 2,3-BD production by the strain from maltodextrin. Under interim fed-batch fermentation, 2,3-BD concentration, yield, and productivity were obtained at 88.1±0.2 g/L, 0.412±0.001 g/g, and 1.13±0.01 g/L/h respectively within 78 h.
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Affiliation(s)
- Sitha Chan
- Metabolic Engineering Research Unit, School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology, 111 University Ave., Suranaree Sub-district, Muang District, Nakhon Ratchasima, 30000, Thailand
| | - Sirima Suvarnakuta Jantama
- Division of Biopharmacy, Faculty of Pharmaceutical Sciences, Ubon Ratchathani University, Warinchamrap, Ubon Ratchathani, 34190, Thailand
| | - Sunthorn Kanchanatawee
- Metabolic Engineering Research Unit, School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology, 111 University Ave., Suranaree Sub-district, Muang District, Nakhon Ratchasima, 30000, Thailand
| | - Kaemwich Jantama
- Metabolic Engineering Research Unit, School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology, 111 University Ave., Suranaree Sub-district, Muang District, Nakhon Ratchasima, 30000, Thailand
- * E-mail:
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17
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Metabolic engineering of Klebsiella pneumoniae and in silico investigation for enhanced 2,3-butanediol production. Biotechnol Lett 2016; 38:975-82. [DOI: 10.1007/s10529-016-2062-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Accepted: 02/02/2016] [Indexed: 11/26/2022]
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18
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Lee SJ, Lee JH, Yang X, Kim SB, Lee JH, Yoo HY, Park C, Kim SW. Phenolic compounds: Strong inhibitors derived from lignocellulosic hydrolysate for 2,3-butanediol production by Enterobacter aerogenes. Biotechnol J 2015; 10:1920-8. [PMID: 26479290 DOI: 10.1002/biot.201500090] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Revised: 07/22/2015] [Accepted: 10/14/2015] [Indexed: 11/07/2022]
Abstract
Lignocellulosic biomass are attractive feedstocks for 2,3-butanediol production due to their abundant supply and low price. During the hydrolysis of lignocellulosic biomass, various byproducts are formed and their effects on 2,3-butanediol production were not sufficiently studied compared to ethanol production. Therefore, the effects of compounds derived from lignocellulosic biomass (weak acids, furan derivatives and phenolics) on the cell growth, the 2,3-butanediol production and the enzymes activity involved in 2,3-butanediol production were evaluated using Enterobacter aerogenes ATCC 29007. The phenolic compounds showed the most toxic effects on cell growth, 2,3-butanediol production and enzyme activity, followed by furan derivatives and weak acids. The significant effects were not observed in the presence of acetic acid and formic acid. Also, feasibility of 2,3-butanediol production from lignocellulosic biomass was evaluated using Miscanthus as a feedstock. In the fermentation of Miscanthus hydrolysate, 11.00 g/L of 2,3-butanediol was obtained from 34.62 g/L of reducing sugar. However, 2,3-butanediol was not produced when the concentration of total phenolic compounds in the hydrolysate increased to more than 1.5 g/L. The present study provides useful information to develop strategies for biological production of 2,3-butanediol and to establish biorefinery for biochemicals from lignocellulosic biomass.
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Affiliation(s)
- Sang Jun Lee
- Department of Chemical and Biological Engineering, Korea University, Seoul, Republic of Korea
| | - Ju Hun Lee
- Department of Chemical and Biological Engineering, Korea University, Seoul, Republic of Korea
| | - Xiaoguang Yang
- Department of Chemical and Biological Engineering, Korea University, Seoul, Republic of Korea
| | - Sung Bong Kim
- Department of Chemical and Biological Engineering, Korea University, Seoul, Republic of Korea
| | - Ja Hyun Lee
- Department of Chemical and Biological Engineering, Korea University, Seoul, Republic of Korea
| | - Hah Young Yoo
- Department of Chemical and Biological Engineering, Korea University, Seoul, Republic of Korea
| | - Chulhwan Park
- Department of Chemical Engineering, Kwangwoon University, Seoul, Republic of Korea.
| | - Seung Wook Kim
- Department of Chemical and Biological Engineering, Korea University, Seoul, Republic of Korea.
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19
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Enhanced production of (R,R)-2,3-butanediol by metabolically engineered Klebsiella oxytoca. ACTA ACUST UNITED AC 2015; 42:1419-25. [DOI: 10.1007/s10295-015-1648-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 06/22/2015] [Indexed: 10/23/2022]
Abstract
Abstract
Microbial fermentation produces a racemic mixture of 2,3-butanediol ((R,R)-BD, (S,S)-BD, and meso-BD), and the compositions and physiochemical properties vary from microorganism to microorganism. Although the meso form is much more difficult to transport and store because of its higher freezing point than those of the optically active forms, most microorganisms capable of producing 2,3-BD mainly yield meso-2,3-BD. Thus, we developed a metabolically engineered (R,R)-2,3-BD overproducing strain using a Klebsiella oxytoca ΔldhA ΔpflB strain, which shows an outstanding 2,3-BD production performance with more than 90 % of the meso form. A budC gene encoding 2,3-BD dehydrogenase in the K. oxytoca ΔldhA ΔpflB strain was replaced with an exogenous gene encoding (R,R)-2,3-BD dehydrogenase from Paenibacillus polymyxa (K. oxytoca ΔldhA ΔpflB ΔbudC::PBDH strain), and then its expression level was further amplified with using a pBBR1MCS plasmid. The fed-batch fermentation of the K. oxytoca ΔldhA ΔpflB ΔbudC::PBDH (pBBR-PBDH) strain with intermittent glucose feeding allowed the production of 106.7 g/L of (R,R)-2,3-BD [meso-2,3-BD, 9.3 g/L], with a yield of 0.40 g/g and a productivity of 3.1 g/L/h, which should be useful for the industrial application of 2,3-BD.
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20
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Cho S, Kim T, Woo HM, Lee J, Kim Y, Um Y. Enhanced 2,3-Butanediol Production by Optimizing Fermentation Conditions and Engineering Klebsiella oxytoca M1 through Overexpression of Acetoin Reductase. PLoS One 2015; 10:e0138109. [PMID: 26368397 PMCID: PMC4569360 DOI: 10.1371/journal.pone.0138109] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 08/26/2015] [Indexed: 12/28/2022] Open
Abstract
Microbial production of 2,3-butanediol (2,3-BDO) has been attracting increasing interest because of its high value and various industrial applications. In this study, high production of 2,3-BDO using a previously isolated bacterium Klebsiella oxytoca M1 was carried out by optimizing fermentation conditions and overexpressing acetoin reductase (AR). Supplying complex nitrogen sources and using NaOH as a neutralizing agent were found to enhance specific production and yield of 2,3-BDO. In fed-batch fermentations, 2,3-BDO production increased with the agitation speed (109.6 g/L at 300 rpm vs. 118.5 g/L at 400 rpm) along with significantly reduced formation of by-product, but the yield at 400 rpm was lower than that at 300 rpm (0.40 g/g vs. 0.34 g/g) due to acetoin accumulation at 400 rpm. Because AR catalyzing both acetoin reduction and 2,3-BDO oxidation in K. oxytoca M1 revealed more than 8-fold higher reduction activity than oxidation activity, the engineered K. oxytoca M1 overexpressing the budC encoding AR was used in fed-batch fermentation. Finally, acetoin accumulation was significantly reduced by 43% and enhancement of 2,3-BDO concentration (142.5 g/L), yield (0.42 g/g) and productivity (1.47 g/L/h) was achieved compared to performance with the parent strain. This is by far the highest titer of 2,3-BDO achieved by K. oxytoca strains. This notable result could be obtained by finding favorable fermentation conditions for 2,3-BDO production as well as by utilizing the distinct characteristic of AR in K. oxytoca M1 revealing the nature of reductase.
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Affiliation(s)
- Sukhyeong Cho
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - Taeyeon Kim
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
- Interdisciplinary Program in Agriculture Biotechnology, College of Agriculture and Life science, Seoul National University, Seoul, Republic of Korea
| | - Han Min Woo
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
- Clean Energy and Chemical Engineering, Korea University of Science and Technology, Daejeon, Republic of Korea
| | - Jinwon Lee
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, Republic of Korea
| | - Yunje Kim
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - Youngsoon Um
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
- Clean Energy and Chemical Engineering, Korea University of Science and Technology, Daejeon, Republic of Korea
- * E-mail:
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21
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Jantama K, Polyiam P, Khunnonkwao P, Chan S, Sangproo M, Khor K, Jantama SS, Kanchanatawee S. Efficient reduction of the formation of by-products and improvement of production yield of 2,3-butanediol by a combined deletion of alcohol dehydrogenase, acetate kinase-phosphotransacetylase, and lactate dehydrogenase genes in metabolically engineered Klebsiella oxytoca in mineral salts medium. Metab Eng 2015; 30:16-26. [PMID: 25895450 DOI: 10.1016/j.ymben.2015.04.004] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Revised: 03/18/2015] [Accepted: 04/08/2015] [Indexed: 11/24/2022]
Abstract
Klebsiella oxytoca KMS005 (∆adhE∆ackA-pta∆ldhA) was metabolically engineered to improve 2,3-butanediol (BDO) yield. Elimination of alcohol dehydrogenase E (adhE), acetate kinase A-phosphotransacetylase (ackA-pta), and lactate dehydrogenase A (ldhA) enzymes allowed BDO production as a primary pathway for NADH re-oxidation, and significantly reduced by-products. KMS005 was screened for the efficient glucose utilization by metabolic evolution. KMS005-73T improved BDO production at a concentration of 23.5±0.5 g/L with yield of 0.46±0.02 g/g in mineral salts medium containing 50 g/L glucose in a shake flask. KMS005-73T also exhibited BDO yields of about 0.40-0.42 g/g from sugarcane molasses, cassava starch, and maltodextrin. During fed-batch fermentation, KMS005-73T produced BDO at a concentration, yield, and overall and specific productivities of 117.4±4.5 g/L, 0.49±0.02 g/g, 1.20±0.05 g/Lh, and 27.2±1.1 g/gCDW, respectively. No acetoin, lactate, and formate were detected, and only trace amounts of acetate and ethanol were formed. The strain also produced the least by-products and the highest BDO yield among other Klebsiella strains previously developed.
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Affiliation(s)
- Kaemwich Jantama
- Metabolic Engineering Research Unit, School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology, 111 University Avenue, Suranaree Sub-District, Muang District, 30000 Nakhon Ratchasima, Thailand.
| | - Pattharasedthi Polyiam
- Metabolic Engineering Research Unit, School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology, 111 University Avenue, Suranaree Sub-District, Muang District, 30000 Nakhon Ratchasima, Thailand
| | - Panwana Khunnonkwao
- Metabolic Engineering Research Unit, School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology, 111 University Avenue, Suranaree Sub-District, Muang District, 30000 Nakhon Ratchasima, Thailand
| | - Sitha Chan
- Metabolic Engineering Research Unit, School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology, 111 University Avenue, Suranaree Sub-District, Muang District, 30000 Nakhon Ratchasima, Thailand
| | - Maytawadee Sangproo
- Metabolic Engineering Research Unit, School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology, 111 University Avenue, Suranaree Sub-District, Muang District, 30000 Nakhon Ratchasima, Thailand
| | - Kirin Khor
- Metabolic Engineering Research Unit, School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology, 111 University Avenue, Suranaree Sub-District, Muang District, 30000 Nakhon Ratchasima, Thailand
| | - Sirima Suvarnakuta Jantama
- Division of Biopharmacy, Faculty of Pharmaceutical Sciences, Ubon Ratchathani University, Warinchamrap, Ubon Ratchathani 34190, Thailand
| | - Sunthorn Kanchanatawee
- Metabolic Engineering Research Unit, School of Biotechnology, Institute of Agricultural Technology, Suranaree University of Technology, 111 University Avenue, Suranaree Sub-District, Muang District, 30000 Nakhon Ratchasima, Thailand
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22
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Jeon S, Kim DK, Song H, Lee HJ, Park S, Seung D, Chang YK. 2,3-Butanediol recovery from fermentation broth by alcohol precipitation and vacuum distillation. J Biosci Bioeng 2014; 117:464-70. [DOI: 10.1016/j.jbiosc.2013.09.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Revised: 08/30/2013] [Accepted: 09/12/2013] [Indexed: 11/30/2022]
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23
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Identification of acetoin reductases involved in 2,3-butanediol pathway in Klebsiella oxytoca. J Biotechnol 2013; 172:59-66. [PMID: 24389066 DOI: 10.1016/j.jbiotec.2013.12.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 12/05/2013] [Accepted: 12/10/2013] [Indexed: 11/22/2022]
Abstract
The acetoin reductase (AR) of Klebsiella oxytoca is responsible for converting acetoin into 2,3-butanediol (2,3-BDO) during sugar fermentation. Deleting the AR encoding gene (budC) in the 2,3-BDO operon does not block production of 2,3-BDO, as another similar gene exists in addition to budC called diacetyl/acetoin reductase (dar) which shares 53% identity with budC. In the present study, both budC and dar of K. oxytoca were independently cloned and expressed in Escherichia coli along with budA (acetolactate decarboxylase) and budB (acetolactate synthase), which are responsible for converting pyruvate into acetoin. The recombinant E. coli expressing budABC and budAB-dar produced 2,3-BDO from glucose but E. coli expressing only budAB did not and produced acetoin alone. This demonstrates that Dar functions similar to BudC. Mutants of budC, dar, and both genes together were developed in K. oxytoca ΔldhA (lactate dehydrogenase). K. oxytoca ΔldhA ΔbudC Δdar, deficient in both AR genes, showed reduced 2,3-BDO concentration when compared to K. oxytoca ΔldhA and K. oxytoca ΔldhA ΔbudC by 84% and 69%, respectively. Interestingly, K. oxytoca ΔldhA Δdar resulted in a significant reduction in the reversible conversion of 2,3-BDO into acetoin than that of K. oxytoca ΔldhA, which was observed in a glucose depleted fermentation culture. In addition, we observed that Dar played a key role in dissimilation of 2,3-BDO in media containing 2,3-BDO alone.
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24
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Lee S, Kim B, Jeong D, Oh M, Um Y, Kim YR, Kim J, Lee J. Observation of 2,3-butanediol biosynthesis in Lys regulator mutated Klebsiella pneumoniae at gene transcription level. J Biotechnol 2013; 168:520-6. [DOI: 10.1016/j.jbiotec.2013.09.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 09/17/2013] [Accepted: 09/18/2013] [Indexed: 11/30/2022]
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25
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Kim SJ, Seo SO, Jin YS, Seo JH. Production of 2,3-butanediol by engineered Saccharomyces cerevisiae. BIORESOURCE TECHNOLOGY 2013; 146:274-281. [PMID: 23941711 DOI: 10.1016/j.biortech.2013.07.081] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 07/16/2013] [Accepted: 07/18/2013] [Indexed: 05/04/2023]
Abstract
In order to produce 2,3-butanediol (2,3-BD) with a high titer, it is necessary to engineer Saccharomyces cerevisiae by deleting the competing pathway and overexpressing the 2,3-BD biosynthetic pathway. A pyruvate decarboxylase (Pdc)-deficient mutant was constructed and evolved for rapid glucose consumption without ethanol production. Genome re-sequencing of the evolved strain (SOS4) revealed a point mutation (A81P) in MTH1 coding for a transcriptional regulator involved in glucose sensing, unlike the previously reported Pdc-deficient mutant which had internal deletion in MTH1. When alsS and alsD genes from Bacillus subtilis, and endogenous BDH1 gene were overexpressed in SOS4, the resulting strain (BD4) not only produced 2,3-BD efficiently, but also consumed glucose faster than the parental strain. In fed-batch fermentation with optimum aeration, 2,3-BD concentration increased up to 96.2 g/L. These results suggest that S. cerevisiae might be a promising host for producing 2,3-BD for industrial applications.
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Affiliation(s)
- Soo-Jung Kim
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, South Korea; Center for Food and Bioconvergence, Seoul National University, Seoul 151-921, South Korea
| | - Seung-Oh Seo
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Yong-Su Jin
- Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA; Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
| | - Jin-Ho Seo
- Department of Agricultural Biotechnology, Seoul National University, Seoul 151-921, South Korea; Center for Food and Bioconvergence, Seoul National University, Seoul 151-921, South Korea.
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26
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Park JM, Song H, Lee HJ, Seung D. In silico aided metabolic engineering of Klebsiella oxytoca and fermentation optimization for enhanced 2,3-butanediol production. J Ind Microbiol Biotechnol 2013; 40:1057-66. [PMID: 23779220 DOI: 10.1007/s10295-013-1298-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2013] [Accepted: 05/29/2013] [Indexed: 10/26/2022]
Abstract
Klebsiella oxytoca naturally produces a large amount of 2,3-butanediol (2,3-BD), a promising bulk chemical with wide industrial applications, along with various byproducts. In this study, the in silico gene knockout simulation of K. oxytoca was carried out for 2,3-BD overproduction by inhibiting the formation of byproducts. The knockouts of ldhA and pflB genes were targeted with the criteria of maximization of 2,3-BD production and minimization of byproducts formation. The constructed K. oxytoca ΔldhA ΔpflB strain showed higher 2,3-BD yields and higher final concentrations than those obtained from the wild-type and ΔldhA strains. However, the simultaneous deletion of both genes caused about a 50 % reduction in 2,3-BD productivity compared with K. oxytoca ΔldhA strain. Based on previous studies and in silico investigation that the agitation speed during 2,3-BD fermentation strongly affected cell growth and 2,3-BD synthesis, the effect of agitation speed on 2,3-BD production was investigated from 150 to 450 rpm in 5-L bioreactors containing 3-L culture media. The highest 2,3-BD productivity (2.7 g/L/h) was obtained at 450 rpm in batch fermentation. Considering the inhibition of acetoin for 2,3-BD production, fed-batch fermentations were performed using K. oxytoca ΔldhA ΔpflB strain to enhance 2,3-BD production. Altering the agitation speed from 450 to 350 rpm at nearly 10 g/L of acetoin during the fed-batch fermentation allowed for the production of 113 g/L 2,3-BD, with a yield of 0.45 g/g, and for the production of 2.1 g/L/h of 2,3-BD.
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Affiliation(s)
- Jong Myoung Park
- Research and Development Center, GS Caltex Corporation, 104-4 Munji-dong, Yuseong-gu, Daejeon, 305-380, Republic of Korea
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Park JM, Song H, Lee HJ, Seung D. Genome-scale reconstruction and in silico analysis of Klebsiella oxytoca for 2,3-butanediol production. Microb Cell Fact 2013; 12:20. [PMID: 23432904 PMCID: PMC3602198 DOI: 10.1186/1475-2859-12-20] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Accepted: 02/17/2013] [Indexed: 01/28/2023] Open
Abstract
Background Klebsiella oxytoca, a Gram-negative, rod-shaped, and facultative anaerobic bacterium, is one of the most promising 2,3-butanediol (2,3-BD) producers. In order to improve the metabolic performance of K. oxytoca as an efficient biofactory, it is necessary to assess its metabolic characteristics with a system-wide scope, and to optimize the metabolic pathways at a systems level. Provision of the complete genome sequence of K. oxytoca enabled the construction of genome-scale metabolic model of K. oxytoca and its in silico analyses. Results The genome-scale metabolic model of K. oxytoca was constructed using the annotated genome with biochemical and physiological information. The stoichiometric model, KoxGSC1457, is composed of 1,457 reactions and 1,099 metabolites. The model was further refined by applying biomass composition equations and comparing in silico results with experimental data based on constraints-based flux analyses. Then, the model was applied to in silico analyses to understand the properties of K. oxytoca and also to improve its capabilities for 2,3-BD production according to genetic and environmental perturbations. Firstly, in silico analysis, which tested the effect of augmenting the metabolic flux pool of 2,3-BD precursors, elucidated that increasing the pyruvate pool is primarily important for 2,3-BD synthesis. Secondly, we performed in silico single gene knockout simulation for 2,3-BD overproduction, and investigated the changes of the in silico flux solution space of a ldhA gene knockout mutant in comparison with that of the wild-type strain. Finally, the KoxGSC1457 model was used to optimize the oxygen levels during fermentation for 2,3-BD production. Conclusions The genome-scale metabolic model, KoxGSC1457, constructed in this study successfully investigated metabolic characteristics of K. oxytoca at systems level. The KoxGSC1457 model could be employed as an useful tool to analyze its metabolic capabilities, to predict its physiological responses according to environmental and genetic perturbations, and to design metabolic engineering strategies to improve its metabolic performance.
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Affiliation(s)
- Jong Myoung Park
- Research and Development Center, GS Caltex Corporation, 104-4 Munji-dong, Daejeon, 305-380, Republic of Korea
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Han SH, Lee JE, Park K, Park YC. Production of 2,3-butanediol by a low-acid producing Klebsiella oxytoca NBRF4. N Biotechnol 2013; 30:166-72. [DOI: 10.1016/j.nbt.2012.09.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2012] [Revised: 09/07/2012] [Accepted: 09/10/2012] [Indexed: 11/29/2022]
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Jung SG, Jang JH, Kim AY, Lim MC, Kim B, Lee J, Kim YR. Removal of pathogenic factors from 2,3-butanediol-producing Klebsiella species by inactivating virulence-related wabG gene. Appl Microbiol Biotechnol 2012; 97:1997-2007. [PMID: 22832986 DOI: 10.1007/s00253-012-4284-9] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2012] [Revised: 07/03/2012] [Accepted: 07/04/2012] [Indexed: 01/11/2023]
Abstract
Klebsiella species are the most extensively studied among a number of 2,3-butanediol (2,3-BDO)-producing microorganisms. The ability to metabolize a wide variety of substrates together with the ease of cultivation made this microorganisms particularly promising for the application in industrial-scale production of 2,3-BDO. However, the pathogenic characteristics of encapsulated Klebsiella species are considered to be an obstacle hindering their industrial applications. Here, we removed the virulence factors from three 2,3-BDO-producing strains, Klebsiella pneumoniae KCTC 2242, Klebsiella oxytoca KCTC1686, and K. oxytoca ATCC 43863 through site-specific recombination technique. We generated deletion mutation in wabG gene encoding glucosyltransferase which plays a key role in the synthesis of outer core lipopolysaccharides (LPS) by attaching the first outer core residue D-GalAp to the O-3 position of the L,D-HeppII residue. The morphologies and adhesion properties against epithelial cells were investigated, and the results indicated that the wabG mutant strains were devoid of the outer core LPS and lost the ability to retain capsular structure. The time profile of growth and 2,3-BDO production from K. pneumoniae KCTC 2242 and K. pneumoniae KCTC 2242 ΔwabG were analyzed in batch culture with initial glucose concentration of 70 g/l. The growth was not affected by disrupting wabG gene, but the production of 2,3-BDO decreased from 31.27 to 22.44 g/l in mutant compared with that of parental strain. However, the productions of acetoin and lactate from wabG mutant strain were negligible, whereas that from parental strain reached to ~5 g/l.
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Affiliation(s)
- Sung-Geun Jung
- Institute of Life Sciences and Resources & Department of Food Science and Biotechnology, College of Life Sciences, Kyung Hee University, Yongin 446-701, Republic of Korea
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