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Cox R, Narisetty V, Castro E, Agrawal D, Jacob S, Kumar G, Kumar D, Kumar V. Fermentative valorisation of xylose-rich hemicellulosic hydrolysates from agricultural waste residues for lactic acid production under non-sterile conditions. WASTE MANAGEMENT (NEW YORK, N.Y.) 2023; 166:336-345. [PMID: 37209430 DOI: 10.1016/j.wasman.2023.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 05/02/2023] [Accepted: 05/08/2023] [Indexed: 05/22/2023]
Abstract
Lactic acid (LA) is a platform chemical with diverse industrial applications. Presently, commercial production of LA is dominated by microbial fermentation using sugary or starch-based feedstocks. Research pursuits emphasizing towards sustainable production of LA using non-edible and renewable feedstocks have accelerated the use of lignocellulosic biomass (LCB). The present study focuses on the valorisation of xylose derived from sugarcane bagasse (SCB) and olive pits (OP) through hydrothermal and dilute acid pretreatment, respectively. The xylose-rich hydrolysate obtained was used for LA production by homo-fermentative and thermophilic Bacillus coagulans DSM2314 strain under non-sterile conditions. The fed-batch mode of fermentation resulted in maximum LA titers of 97.8, 52.4 and 61.3 g/L with a yield of 0.77, 0.66 and 0.71 g/g using pure xylose, xylose-rich SCB and OP hydrolysates, respectively. Further, a two-step aqueous two-phase system (ATPS) extraction technique was employed for the separation and recovery of LA accumulated on pure and crude xylose. The LA recovery was 45 - 65% in the first step and enhanced to 80-90% in the second step.The study demonstrated an efficient integrated biorefinery approach to valorising the xylose-rich stream for cost-effective LA production and recovery.
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Affiliation(s)
- Rylan Cox
- School of Aerospace, Transport and Manufacturing, Cranfield University, Cranfield MK43 0AL, UK
| | - Vivek Narisetty
- School of Water, Energy and Environment, Cranfield University, Cranfield MK43 0AL, UK
| | - Eulogio Castro
- Department of Chemical, Environmental and Materials Engineering, Universidad de Jaén, Campus LasLagunillas, 23071 Jaén, Spain
| | - Deepti Agrawal
- Biochemistry and Biotechnology Area, Material Resource Efficiency Division, CSIR-Indian Institute of Petroleum, Mohkampur, Dehradun 248005, India
| | - Samuel Jacob
- Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603203, India
| | - Gopalakrishnan Kumar
- School of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Deepak Kumar
- Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, Syracuse, NY 13210, USA
| | - Vinod Kumar
- School of Water, Energy and Environment, Cranfield University, Cranfield MK43 0AL, UK; Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India.
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Enterococcus faecium s6 Enabled Efficient Homofermentative Lactic Acid Production from Xylan-Derived Sugars. FERMENTATION-BASEL 2022. [DOI: 10.3390/fermentation8030134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A thermotolerant Enterococcus faecium s6 strain exhibited homoferementative lactic acid (LA) production at high xylose concentration (≥50 g/L). In batch fermentation at 45 °C and controlled pH of 6.5, strain E. faecium s6 produced up to 72.9 g/L of LA with a yield of 0.99 g/g-consumed xylose and productivity of 1.74 g/L.h from 75 g/L xylose. An increased LA concentration and productivities with high yields were obtained in repeated batch fermentation that was conducted for 24 runs. In this mode, the strain could produce LA up 81.1 g/L within 5 h fermentation at a high productivity of 13.5 g/L.h and a yield of 1.02 g/g-consumed xylose. The strain was unable to consume birchwood xylan as sole carbon source. However, it could efficiently utilize xylooligosaccharides of xylobiose, xylotriose, xylotetraose, xylopentaose, and xylohexaose. The intracellular xylosidase activity was induced by xylose. Using xylooligosaccharide (50 g/L)/xylose (5 g/L) mixtures, the strain was able to produce maximum LA at 48.2 g/L within 120 h at a yield of 1.0 g/g-consumed sugar and productivity of 0.331 g/L.h. These results indicate that E. faecium s6 is capable of directly utilizing xylan-hydrolyzate and will enable the development of a feasible and economical approach to the production of LA from hemicellulosic hydrolysate.
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Esquivel-Hernández DA, García-Pérez JS, López-Pacheco IY, Iqbal HMN, Parra-Saldívar R. Resource recovery of lignocellulosic biomass waste into lactic acid - Trends to sustain cleaner production. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 301:113925. [PMID: 34731961 DOI: 10.1016/j.jenvman.2021.113925] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 09/16/2021] [Accepted: 10/07/2021] [Indexed: 02/08/2023]
Abstract
Biomass waste generation concerns regulatory authorities to develop novel methods to sustain biotransformation processes. Particularly, lactic acid (LA) is a bulk commodity chemical used in diverse industries and holds a growing global market demand. Recently, lignocellulosic waste biomass is preferred for LA bio-production because of its non-edible and inexpensive nature. However, the information about new pretreatment methods for lignocellulosic feedstock, and novel strains capable to produce LA through fermentation is limited. Therefore, this review highlights the advancement of pretreatments methods of lignocellulosic biomass and biotransformation. Herein, we first briefly explored the main sources of lignocellulosic waste biomass, then we explored their latest advances in pretreatment processes particularly supercritical fluid extraction, and microwave-assisted extraction. Approaches for bioconversion were also analyzed, such as consolidated bioprocessing (CBP), simultaneous saccharification and fermentation (SSF), separate hydrolysis fermentation (SHF), among other alternatives. Also, new trends and approaches were documented, such as metagenomics to find novel strains of microorganisms and the use of recombinant strategies for the creation of new strains. Finally, we developed a holistic and sustainable perspective based on novel microbial ecology tools such as next-gen sequencing, bioinformatics, and metagenomics. All these shed light on the needs to culture powerful microbial isolates, co-cultures, and mixed consortia to improve fermentation processes with the aim of optimizing cultures and feedstock pretreatments.
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Affiliation(s)
- Diego A Esquivel-Hernández
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey, 64849, Mexico; Departamento de Microbiologia Molecular, Instituto de Biotecnologia, Universidad Nacional Autónoma de México (UNAM), Cuernavaca, Morelos, Mexico
| | - J Saúl García-Pérez
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey, 64849, Mexico
| | - Itzel Y López-Pacheco
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey, 64849, Mexico
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey, 64849, Mexico.
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Ingle AT, Fortney NW, Walters KA, Donohue TJ, Noguera DR. Mixed Acid Fermentation of Carbohydrate-Rich Dairy Manure Hydrolysate. Front Bioeng Biotechnol 2021; 9:724304. [PMID: 34414173 PMCID: PMC8370043 DOI: 10.3389/fbioe.2021.724304] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 07/20/2021] [Indexed: 01/04/2023] Open
Abstract
Dairy manure (DM) is an abundant agricultural residue that is largely composed of lignocellulosic biomass. The aim of this study was to investigate if carbon derived from DM fibers can be recovered as medium-chain fatty acids (MCFAs), which are mixed culture fermentation products of economic interest. DM fibers were subjected to combinations of physical, enzymatic, chemical, and thermochemical pretreatments to evaluate the possibility of producing carbohydrate-rich hydrolysates suitable for microbial fermentation by mixed cultures. Among the pretreatments tested, decrystalization dilute acid pretreatment (DCDA) produced the highest concentrations of glucose and xylose, and was selected for further experiments. Bioreactors fed DCDA hydrolysate were operated. Acetic acid and butyric acid comprised the majority of end products during operation of the bioreactors. MCFAs were transiently produced at a maximum concentration of 0.17 mg CODMCFAs/mg CODTotal. Analyses of the microbial communities in the bioreactors suggest that lactic acid bacteria, Megasphaera, and Caproiciproducens were involved in MCFA and C4 production during DCDA hydrolysate metabolism.
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Affiliation(s)
- Abel T Ingle
- Department of Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, WI, United States
| | - Nathaniel W Fortney
- Wisconsin Energy Institute, University of Wisconsin-Madison, Madison, WI, United States.,Great Lakes Bioenergy Research Center, Madison, WI, United States
| | - Kevin A Walters
- Wisconsin Energy Institute, University of Wisconsin-Madison, Madison, WI, United States.,Great Lakes Bioenergy Research Center, Madison, WI, United States.,Department of Bacteriology, University of Wisconsin-Madison, Madison, WI, United States
| | - Timothy J Donohue
- Wisconsin Energy Institute, University of Wisconsin-Madison, Madison, WI, United States.,Great Lakes Bioenergy Research Center, Madison, WI, United States.,Department of Bacteriology, University of Wisconsin-Madison, Madison, WI, United States
| | - Daniel R Noguera
- Department of Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, WI, United States.,Wisconsin Energy Institute, University of Wisconsin-Madison, Madison, WI, United States.,Great Lakes Bioenergy Research Center, Madison, WI, United States
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Hoheneder R, Fitz E, Bischof RH, Russmayer H, Ferrero P, Peacock S, Sauer M. Efficient conversion of hemicellulose sugars from spent sulfite liquor into optically pure L-lactic acid by Enterococcus mundtii. BIORESOURCE TECHNOLOGY 2021; 333:125215. [PMID: 33964599 DOI: 10.1016/j.biortech.2021.125215] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 04/19/2021] [Accepted: 04/20/2021] [Indexed: 06/12/2023]
Abstract
Spent sulfite liquor (SSL), a waste stream from wood pulp production, has great potential as carbon source for future industrial fermentations. In the present study, SSL was separated into a hemicellulose derived sugar syrup (HDSS) and a lignosulfonic fraction by simulated moving bed chromatography. The recovery of SSL sugars in the HDSS was 89% and the fermentation inhibitors furfural, 5-hydroxymethylfurfural and acetic acid were removed by 98.7%, 60.5% and 75.5%, respectively. The obtained sugars have been converted to L-lactic acid, a building block for bioplastics, by fermentation with the lactic acid bacterium Enterococcus mundtii DSM4838. Batch fermentations on HDSS produced up to 56.3 g/L L-lactic acid. Simultaneous conversion of pentose and hexose sugars during fed-batch fermentation of wildtype E. mundtii led to 87.9 g/L optically pure (>99%) L-lactic acid, with maximum productivities of 3.25 g/L.h and yields approaching 1.00 g/g during feeding phase from HDSS as carbon source.
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Affiliation(s)
- R Hoheneder
- Department of Wood Chemistry & Biotechnology, Wood Kplus - Kompetenzzentrum Holz GmbH, c/o Muthgasse 18, 1190 Vienna, Austria; Institute of Microbiology and Microbial Biotechnology, Department of Biotechnology, BOKU-University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190 Vienna, Austria
| | - E Fitz
- Department of Wood Chemistry & Biotechnology, Wood Kplus - Kompetenzzentrum Holz, c/o Werkstraße 2, 4860 Lenzing, Austria
| | - R H Bischof
- Lenzing Aktiengesellschaft, Werkstraße 2, 4860 Lenzing, Austria
| | - H Russmayer
- Institute of Microbiology and Microbial Biotechnology, Department of Biotechnology, BOKU-University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190 Vienna, Austria
| | - P Ferrero
- Amalgamated Research LLC, 2531 Orchard Drive East, Twin Falls, ID 83301, United States
| | - S Peacock
- Amalgamated Research LLC, 2531 Orchard Drive East, Twin Falls, ID 83301, United States
| | - M Sauer
- Institute of Microbiology and Microbial Biotechnology, Department of Biotechnology, BOKU-University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190 Vienna, Austria.
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Efficient Co-Utilization of Biomass-Derived Mixed Sugars for Lactic Acid Production by Bacillus coagulans Azu-10. FERMENTATION-BASEL 2021. [DOI: 10.3390/fermentation7010028] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Lignocellulosic and algal biomass are promising substrates for lactic acid (LA) production. However, lack of xylose utilization and/or sequential utilization of mixed-sugars (carbon catabolite repression, CCR) from biomass hydrolysates by most microorganisms limits achievable titers, yields, and productivities for economical industry-scale production. This study aimed to design lignocellulose-derived substrates for efficient LA production by a thermophilic, xylose-utilizing, and inhibitor-resistant Bacillus coagulans Azu-10. This strain produced 102.2 g/L of LA from 104 g/L xylose at a yield of 1.0 g/g and productivity of 3.18 g/L/h. The CCR effect and LA production were investigated using different mixtures of glucose (G), cellobiose (C), and/or xylose (X). Strain Azu-10 has efficiently co-utilized GX and CX mixture without CCR; however, total substrate concentration (>75 g/L) was the only limiting factor. The strain completely consumed GX and CX mixture and homoferemnatively produced LA up to 76.9 g/L. On the other hand, fermentation with GC mixture exhibited obvious CCR where both glucose concentration (>25 g/L) and total sugar concentration (>50 g/L) were the limiting factors. A maximum LA production of 50.3 g/L was produced from GC mixture with a yield of 0.93 g/g and productivity of 2.09 g/L/h. Batch fermentation of GCX mixture achieved a maximum LA concentration of 62.7 g/L at LA yield of 0.962 g/g and productivity of 1.3 g/L/h. Fermentation of GX and CX mixture was the best biomass for LA production. Fed-batch fermentation with GX mixture achieved LA production of 83.6 g/L at a yield of 0.895 g/g and productivity of 1.39 g/L/h.
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Ahmad A, Banat F, Taher H. Comparative study of lactic acid production from date pulp waste by batch and cyclic-mode dark fermentation. WASTE MANAGEMENT (NEW YORK, N.Y.) 2021; 120:585-593. [PMID: 33176940 DOI: 10.1016/j.wasman.2020.10.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 10/20/2020] [Accepted: 10/20/2020] [Indexed: 06/11/2023]
Abstract
Biowaste valorization into lactic acid (LA) by treatment with indigenous microbiota has recently gained considerable attention. LA production from date pulp waste provides an opportunity for resource recovery, reduces environmental issues, and possibly turns biomass into wealth. This study aimed to compare the performance of batch and cyclic fermentation processes in LA production with and without enzymatic pretreatment. The fermentation studies were conducted in the absence of an external inoculum source (relying on indigenous microbiota) and without the addition of nutrients. The highest LA volumetric productivity (3.56 g/liter/day), yield (0.07 g/g-TS), and concentration (21.66 g/L) were attained with enzymatic pretreated date pulp in the cyclic-mode fermentation at the optimized conditions. The productivity rate of LA was enhanced in the cyclic-mode as compared to the batch process. Enzymatic pretreatment increased the digestibility of cellulose that led to higher LA yield. An Artificial Neural Network model was developed to optimize the process parameters and to predict the LA concentration from date pulp waste in both fermentation processes. The main advantage of the ANN approach is the ability to perform quick predictions without resource-consuming experiments. The model predicted optimal conditions well and demonstrated good agreement between experimental and predicted data.
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Affiliation(s)
- Ashfaq Ahmad
- Department of Chemical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates.
| | - Fawzi Banat
- Department of Chemical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates.
| | - Hanifa Taher
- Department of Chemical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates
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Transcriptome profile of carbon catabolite repression in an efficient l-(+)-lactic acid-producing bacterium Enterococcus mundtii QU25 grown in media with combinations of cellobiose, xylose, and glucose. PLoS One 2020; 15:e0242070. [PMID: 33201910 PMCID: PMC7671544 DOI: 10.1371/journal.pone.0242070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 10/26/2020] [Indexed: 11/19/2022] Open
Abstract
Enterococcus mundtii QU25, a non-dairy lactic acid bacterium of the phylum Firmicutes, is capable of simultaneously fermenting cellobiose and xylose, and is described as a promising strain for the industrial production of optically pure l-lactic acid (≥ 99.9%) via homo-fermentation of lignocellulosic hydrolysates. Generally, Firmicutes bacteria show preferential consumption of sugar (usually glucose), termed carbon catabolite repression (CCR), while hampering the catabolism of other sugars. In our previous study, QU25 exhibited apparent CCR in a glucose-xylose mixture phenotypically, and transcriptional repression of the xylose operon encoding initial xylose metabolism genes, likely occurred in a CcpA-dependent manner. QU25 did not exhibit CCR phenotypically in a cellobiose-xylose mixture. The aim of the current study is to elucidate the transcriptional change associated with the simultaneous utilization of cellobiose and xylose. To this end, we performed RNA-seq analysis in the exponential growth phase of E. mundtii QU25 cells grown in glucose, cellobiose, and/or xylose as either sole or co-carbon sources. Our transcriptomic data showed that the xylose operon was weakly repressed in cells grown in a cellobiose-xylose mixture compared with that in cells grown in a glucose-xylose mixture. Furthermore, the gene expression of talC, the sole gene encoding transaldolase, is expected to be repressed by CcpA-mediated CCR. QU25 metabolized xylose without using transaldolase, which is necessary for homolactic fermentation from pentoses using the pentose-phosphate pathway. Hence, the metabolism of xylose in the presence of cellobiose by QU25 may have been due to 1) sufficient amounts of proteins encoded by the xylose operon genes for xylose metabolism despite of the slight repression of the operon, and 2) bypassing of the pentose-phosphate pathway without the TalC activity. Accordingly, we have determined the targets of genetic modification in QU25 to metabolize cellobiose, xylose and glucose simultaneously for application of the lactic fermentation from lignocellulosic hydrolysates.
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Zhang Z, Li Y, Zhang J, Peng N, Liang Y, Zhao S. High-Titer Lactic Acid Production by Pediococcus acidilactici PA204 from Corn Stover through Fed-Batch Simultaneous Saccharification and Fermentation. Microorganisms 2020; 8:microorganisms8101491. [PMID: 32998448 PMCID: PMC7600695 DOI: 10.3390/microorganisms8101491] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 09/18/2020] [Accepted: 09/22/2020] [Indexed: 12/21/2022] Open
Abstract
Lignocellulose comprised of cellulose and hemicellulose is one of the most abundant renewable feedstocks. Lactic acid bacteria have the ability to ferment sugar derived from lignocellulose. In this study, Pediococcus acidilactici PA204 is a lactic acid bacterium with a high tolerance of temperature and high-efficiency utilization of xylose. We developed a fed-batch simultaneous saccharification and fermentation (SSF) process at 37 °C (pH 6.0) using the 30 FPU (filter paper units)/g cellulase and 20 g/L corn steep powder in a 5 L bioreactor to produce lactic acid (LA). The titer, yield, and productivity of LA produced from 12% (w/w) NaOH-pretreated and washed stover were 92.01 g/L, 0.77 g/g stover, and 1.28 g/L/h, respectively, and those from 15% NaOH-pretreated and washed stover were 104.11 g/L, 0.69 g/g stover, and 1.24 g/L/h, respectively. This study develops a feasible fed-batch SSF process for LA production from corn stover and provides a promising candidate strain for high-titer and -yield lignocellulose-derived LA production.
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Affiliation(s)
- Zhenting Zhang
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Z.Z.); (Y.L.); (J.Z.); (N.P.); (Y.L.)
| | - Yanan Li
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Z.Z.); (Y.L.); (J.Z.); (N.P.); (Y.L.)
| | - Jianguo Zhang
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Z.Z.); (Y.L.); (J.Z.); (N.P.); (Y.L.)
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China
| | - Nan Peng
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Z.Z.); (Y.L.); (J.Z.); (N.P.); (Y.L.)
| | - Yunxiang Liang
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Z.Z.); (Y.L.); (J.Z.); (N.P.); (Y.L.)
| | - Shumiao Zhao
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (Z.Z.); (Y.L.); (J.Z.); (N.P.); (Y.L.)
- Correspondence: ; Tel.: +86-27-8728-1267; Fax: +86-27-8728-0670
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Efe D. Potential Plant Growth-Promoting Bacteria with Heavy Metal Resistance. Curr Microbiol 2020; 77:3861-3868. [PMID: 32960302 DOI: 10.1007/s00284-020-02208-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 09/09/2020] [Indexed: 11/30/2022]
Abstract
Plant growth-promoting (PGP) bacteria commonly have many strategies to cope with heavy metal toxicity. Heavy metal-resistant PGP bacteria can be used to improve the growth of plants in heavy metal contaminated soils. In this study, the soil samples were collected from the lead-zinc mineral deposits in Gümüşhane Province, Turkey. Nine bacterial isolates were obtained on the nutrient agar medium supplemented with 100 mg/mL zinc and lead. All of the isolates were screened in terms of plant growth-promoting characteristics including production of indole-3-acetic acid and siderophore, nitrogen fixation and phosphate solubilisation. Nine bacteria were identified as Bacillus cereus, Bacillus atrophaeus, Bacillus pumilus, Bacillus amyloliquefaciens, Bacillus tropicus, Bacillus subtilis, Bacillus halotolerans, Bacillus vallismortis, and Enterococcus mundtii by classical and 16S rDNA-PCR assays. In addition, these isolates were evaluated for their response to three heavy metals (lead, zinc, copper) dominant in the soil samples and minimal inhibitory concentration (MIC) of the heavy metals was determined with plate dilution method. Consequently, the bacterial isolates in this study possess plant growth-promoting traits and can ameliorate heavy metal contaminated soil. E. mundtii was reported to be found in heavy metal contaminated soil for the first time. This study is the first report about PGP characteristics (IAA production and phosphate solubilisation) of B. vallismortis.
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Affiliation(s)
- Derya Efe
- Department of Medicinal and Aromatic Plants, Espiye Vocational School, Giresun University, 28000, Giresun, Turkey.
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11
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Wang Y, Chan KL, Abdel-Rahman MA, Sonomoto K, Leu SY. Dynamic simulation of continuous mixed sugar fermentation with increasing cell retention time for lactic acid production using Enterococcus mundtii QU 25. BIOTECHNOLOGY FOR BIOFUELS 2020; 13:112. [PMID: 32607127 PMCID: PMC7318410 DOI: 10.1186/s13068-020-01752-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 06/15/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND The simultaneous and effective conversion of both pentose and hexose in fermentation is a critical and challenging task toward the lignocellulosic economy. This study aims to investigate the feasibility of an innovative co-fermentation process featuring with a cell recycling unit (CF/CR) for mixed sugar utilization. A l-lactic acid-producing strain Enterococcus mundtii QU 25 was applied in the continuous fermentation process, and the mixed sugars were utilized at different productivities after the flowing conditions were changed. A mathematical model was constructed with the experiments to optimize the biological process and clarify the cell metabolism through kinetics analysis. The structured model, kinetic parameters, and achievement of the fermentation strategy shall provide new insights toward whole sugar fermentation via real-time monitoring for process control and optimization. RESULTS Significant carbon catabolite repression in co-fermentation using a glucose/xylose mixture was overcome by replacing glucose with cellobiose, and the ratio of consumed pentose to consumed hexose increased significantly from 0.096 to 0.461 by mass. An outstanding product concentration of 65.2 g L-1 and productivity of 13.03 g L-1 h-1 were achieved with 50 g L-1 cellobiose and 30 g L-1 xylose at an optimized dilution rate of 0.2 h-1, and the cell retention time gradually increased. Among the total lactic acid production, xylose contributed to more than 34% of the mixed sugars, which was close to the related contents in agricultural residuals. The model successfully simulated the transition of sugar consumption, cell growth, and lactic acid production among the batch, continuous process, and CF/CR systems. CONCLUSION Cell retention time played a critical role in balancing pentose and hexose consumption, cell decay, and lactic acid production in the CF/CR process. With increasing cell concentration, consumption of mixed sugars increased with the productivity of the final product; hence, the impact of substrate inhibition was reduced. With the validated parameters, the model showed the highest accuracy simulating the CF/CR process, and significantly longer cell retention times compared to hydraulic retention time were tested.
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Affiliation(s)
- Ying Wang
- Department of Biological Science, College of Life Sciences, Sichuan Normal University, Chengdu, 610101 Sichuan China
- Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Ka-Lai Chan
- Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Mohamed Ali Abdel-Rahman
- Laboratory of Microbial Technology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Motooka, Nishi‐ku, Fukuoka, Japan
- Botany and Microbiology Department, Faculty of Science (Boys), Al-Azhar University, PN:11884, Nasr City, Cairo, Egypt
| | - Kenji Sonomoto
- Laboratory of Microbial Technology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Motooka, Nishi‐ku, Fukuoka, Japan
| | - Shao-Yuan Leu
- Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Kowloon, Hong Kong
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12
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Ajala EO, Olonade YO, Ajala MA, Akinpelu GS. Lactic Acid Production from Lignocellulose – A Review of Major Challenges and Selected Solutions. CHEMBIOENG REVIEWS 2020. [DOI: 10.1002/cben.201900018] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Elijah Olawale Ajala
- University of IlorinDepartment of Chemical Engineering P.M.B. 1515 Ilorin Nigeria
- University of IlorinUnilorin Sugar Research Institute Ilorin Nigeria
| | | | - Mary Adejoke Ajala
- University of IlorinDepartment of Chemical Engineering P.M.B. 1515 Ilorin Nigeria
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Nabeta K, Watanabe S, Chibazakura T, Zendo T, Sonomoto K, Shimizu-Kadota M, Yoshikawa H. Constitutive expression of phosphoketolase, a key enzyme for metabolic shift from homo- to heterolactic fermentation in Enterococcus mundtii QU 25. BIOSCIENCE OF MICROBIOTA FOOD AND HEALTH 2019; 38:111-114. [PMID: 31384523 PMCID: PMC6663511 DOI: 10.12938/bmfh.18-030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 04/15/2019] [Indexed: 11/05/2022]
Abstract
Phosphoketolase (PK) is responsible for heterolactic fermentation; however, the PK gene of Enterococcus mundtii QU 25, xfpA, is transcribed constitutively, even under homolactic fermentation conditions. In order to deduce the regulatory mechanisms of PK activity in QU 25, XfpA levels in QU 25 cells under hetero- and homolactic fermentation conditions were tested using western blotting. The results showed that the XfpA protein expression was similar under both conditions and that the expression products formed complexes, most likely homodimers, indicating that the regulation of PK activity is downstream of translation.
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Affiliation(s)
- Keisuke Nabeta
- Department of Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Satoru Watanabe
- Department of Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Taku Chibazakura
- Department of Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Takeshi Zendo
- Laboratory of Microbial Technology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kenji Sonomoto
- Laboratory of Microbial Technology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Mariko Shimizu-Kadota
- Department of Environmental Systems Sciences, Musashino University, 3-3-3 Ariake, Koto-ku, Tokyo 135-8181, Japan.,Department of Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Hirofumi Yoshikawa
- Department of Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan.,NODAI Genome Research Center, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
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14
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Abdel-Rahman MA, Hassan SED, Azab MS, Mahin AA, Gaber MA. High Improvement in Lactic Acid Productivity by New Alkaliphilic Bacterium Using Repeated Batch Fermentation Integrated with Increased Substrate Concentration. BIOMED RESEARCH INTERNATIONAL 2019; 2019:7212870. [PMID: 30792995 PMCID: PMC6354166 DOI: 10.1155/2019/7212870] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 11/22/2018] [Accepted: 01/06/2019] [Indexed: 11/25/2022]
Abstract
Optically pure lactic acid (LA) is an important chemical platform that has a wide range of industrial and biotechnological applications. Improved parameters for cost effective LA production are of great interest for industrial developments. In the present study, an alkaliphilic lactic acid bacterium, BoM 1-2, was selected among 369 newly obtained bacterial isolates. It was characterized using API 50 CHL kit and identified as Enterococcus hirae BoM 1-2 by 16S rRNA gene sequence analysis. Efficient polymer-grade L-lactic acid production was achieved at pH 9.0 and 40°C. In batch fermentation strategy using 20 g L-1 glucose, 19.6 g L-1 lactic acid was obtained with volumetric productivity of 2.18 g L-1 h-1. While using 100 g L-1 glucose, 96.0 g L-1 lactic acid was obtained with volumetric productivity of 1.07 g L-1 h-1. The highest lactic acid concentration of 180.6 g L-1 was achieved in multipulse fed batch strategy with volumetric productivity of 0.65 g L-1 h-1. To achieve higher productivity, repeated fermentation processes were applied using the two different strategies. In the first strategy, the lactic acid productivity was increased from 1.97 g L-1 h-1 to 4.48 g L-1 h-1 when the total of 10 repeated runs were carried out using 60 g L-1 glucose, but lactic acid productivity decreased to 2.95 g L-1 h-1 using 100 g L-1 glucose. In second strategy, repeated fermentation coupled with gradual increase in glucose concentration from 40 to 100 g L-1 was conducted for 24 runs. A dramatic increase in LA productivity up to 39.9 g L-1 h-1 (18-fold compared to first run) was achieved using 40 g L-1 glucose while volumetric productivity ranging between 24.8 and 29.9 g L-1 h-1 was achieved using 60-100 g L-1 glucose.
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Affiliation(s)
- Mohamed Ali Abdel-Rahman
- Botany and Microbiology Department, Faculty of Science (Boys), Al-Azhar University, P.N.:11884, Nasr City, Cairo, Egypt
| | - Saad El-Din Hassan
- Botany and Microbiology Department, Faculty of Science (Boys), Al-Azhar University, P.N.:11884, Nasr City, Cairo, Egypt
| | - Mohamed Salah Azab
- Botany and Microbiology Department, Faculty of Science (Boys), Al-Azhar University, P.N.:11884, Nasr City, Cairo, Egypt
| | - Abdullah-Al- Mahin
- Microbiology and Industrial Irradiation Division (MIID), Institute of Food and Radiation Biology (IFRB), Atomic Energy Research Establishment (AERE), Ganakbari, Savar, Dhaka-1349, Bangladesh
| | - Mahmoud Ali Gaber
- Botany and Microbiology Department, Faculty of Science (Boys), Al-Azhar University, P.N.:11884, Nasr City, Cairo, Egypt
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15
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Cooper-Bribiesca B, Navarro-Ocaña A, Díaz-Ruiz G, Aguilar-Osorio G, Rodríguez-Sanoja R, Wacher C. Lactic Acid Fermentation of Arabinoxylan From Nejayote by Streptococcus infantarius ssp. infantarius 25124 Isolated From Pozol. Front Microbiol 2018; 9:3061. [PMID: 30619147 PMCID: PMC6305286 DOI: 10.3389/fmicb.2018.03061] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 11/27/2018] [Indexed: 01/01/2023] Open
Abstract
Streptococcus infantarius ssp. infantarius 25124 (Sii-25124) is a lactic acid bacterium (LAB) isolated from pozol, a refreshing beverage prepared by suspending fermented nixtamal (a thermal and alkali-treated maize dough) in water. Although Lactobacillus are the predominant strains in fermented doughs, such as sourdoughs, and non-nixtamalized fermented maize foods, the pozol microbiota is markedly different. This may be the result of the nixtamalization process, which could act as a selective force of some strains. Sii-25124 has been reported as the main amylolytic LAB in pozol; starch is the primary carbon source on nixtamal since monosaccharides and disaccharides are lost during nixtamalization; however, non-amylolytic LAB counts are higher than amylolytic LAB in pozol after 24-h fermentation suggesting that another carbon source is being used by the former bacteria. Hemicellulose (arabinoxylan in maize) becomes available via nixtamalization and is subsequently metabolized by LAB. The aim of this work was to determine whether this bacterium is able to use arabinoxylan as the only carbon source in a defined medium containing arabinoxylan extracted from either nejayote (wash water produced during nixtamal preparation), or beechwood xylan. Xylanase activity in the presence of nejayote arabinoxylan (135.8 ± 48.7 IU/mg protein) was higher than that of beechwood (62.5 ± 19.8 IU/mg protein). Other enzymatic activities, such as arabinofuranosidase and acetyl esterase, were also detected, suggesting the adaptation of the bacterium studied to nixtamal dough. It was concluded that Streptococcus infantarius 25124 isolated from pozol was able to use arabinoxylans, which are present in nixtamal dough, so fermentation does not depend exclusively on free sugars and starch.
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Affiliation(s)
- Barbara Cooper-Bribiesca
- Departamento de Alimentos y Biotecnología, Facultad de Química, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Arturo Navarro-Ocaña
- Departamento de Alimentos y Biotecnología, Facultad de Química, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Gloria Díaz-Ruiz
- Departamento de Alimentos y Biotecnología, Facultad de Química, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Guillermo Aguilar-Osorio
- Departamento de Alimentos y Biotecnología, Facultad de Química, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Romina Rodríguez-Sanoja
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - Carmen Wacher
- Departamento de Alimentos y Biotecnología, Facultad de Química, Universidad Nacional Autónoma de México, Mexico City, Mexico
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16
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Hatti-Kaul R, Chen L, Dishisha T, Enshasy HE. Lactic acid bacteria: from starter cultures to producers of chemicals. FEMS Microbiol Lett 2018; 365:5087731. [DOI: 10.1093/femsle/fny213] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 08/29/2018] [Indexed: 12/26/2022] Open
Affiliation(s)
- Rajni Hatti-Kaul
- Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, Box 124, SE-221 00 Lund, Sweden
| | - Lu Chen
- Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, Box 124, SE-221 00 Lund, Sweden
| | - Tarek Dishisha
- Department of Microbiology and Immunology, Faculty of Pharmacy, Beni-Suef University, 62511 Beni-Suef, Egypt
| | - Hesham El Enshasy
- Institute of Bioproduct Development (IBD), Universiti Teknologi Malaysia (UTM), 81 310 Skudai, Johor, Malaysia
- City of Scientific Research and Technology Applications, New Burg Al Arab, Alexandria, Egypt
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17
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Cizeikiene D, Juodeikiene G, Damasius J. Use of wheat straw biomass in production of L-lactic acid applying biocatalysis and combined lactic acid bacteria strains belonging to the genus Lactobacillus. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2018. [DOI: 10.1016/j.bcab.2018.06.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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18
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Free lactic acid production under acidic conditions by lactic acid bacteria strains: challenges and future prospects. Appl Microbiol Biotechnol 2018; 102:5911-5924. [DOI: 10.1007/s00253-018-9092-4] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 05/10/2018] [Accepted: 05/10/2018] [Indexed: 11/27/2022]
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19
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Liang X, Sun C, Chen B, Du K, Yu T, Luang-In V, Lu X, Shao Y. Insect symbionts as valuable grist for the biotechnological mill: an alkaliphilic silkworm gut bacterium for efficient lactic acid production. Appl Microbiol Biotechnol 2018; 102:4951-4962. [DOI: 10.1007/s00253-018-8953-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 02/12/2018] [Accepted: 03/14/2018] [Indexed: 11/29/2022]
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20
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Shahab RL, Luterbacher JS, Brethauer S, Studer MH. Consolidated bioprocessing of lignocellulosic biomass to lactic acid by a synthetic fungal-bacterial consortium. Biotechnol Bioeng 2018; 115:1207-1215. [DOI: 10.1002/bit.26541] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 12/11/2017] [Accepted: 01/05/2018] [Indexed: 12/17/2022]
Affiliation(s)
- Robert L. Shahab
- Laboratory of Sustainable and Catalytic Processing; Institute of Chemical Sciences and Engineering; École Polytechnique Fédérale de Lausanne (EPFL); Lausanne Switzerland
- Laboratory of Biofuels and Biochemicals; School of Agricultural, Forest and Food Sciences; Bern University of Applied Sciences (BFH); Zollikofen Switzerland
| | - Jeremy S. Luterbacher
- Laboratory of Sustainable and Catalytic Processing; Institute of Chemical Sciences and Engineering; École Polytechnique Fédérale de Lausanne (EPFL); Lausanne Switzerland
| | - Simone Brethauer
- Laboratory of Biofuels and Biochemicals; School of Agricultural, Forest and Food Sciences; Bern University of Applied Sciences (BFH); Zollikofen Switzerland
| | - Michael H. Studer
- Laboratory of Biofuels and Biochemicals; School of Agricultural, Forest and Food Sciences; Bern University of Applied Sciences (BFH); Zollikofen Switzerland
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21
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Huang D, Liu J, Qi Y, Yang K, Xu Y, Feng L. Synergistic hydrolysis of xylan using novel xylanases, β-xylosidases, and an α-L-arabinofuranosidase from Geobacillus thermodenitrificans NG80-2. Appl Microbiol Biotechnol 2017; 101:6023-6037. [PMID: 28616644 DOI: 10.1007/s00253-017-8341-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 03/29/2017] [Accepted: 05/08/2017] [Indexed: 01/01/2023]
Abstract
Lignocellulosic biomass from various types of wood has become a renewable resource for production of biofuels and biobased chemicals. Because xylan is the major component of wood hemicelluloses, highly efficient enzymes to enhance xylan hydrolysis can improve the use of lignocellulosic biomass. In this study, a xylanolytic gene cluster was identified from the crude oil-degrading thermophilic strain Geobacillus thermodenitrificans NG80-2. The enzymes involved in xylan hydrolysis, which include two xylanases (XynA1, XynA2), three β-xylosidases (XynB1, XynB2, XynB3), and one α-L-arabinofuranosidase (AbfA), have many unique features, such as high pH tolerance, high thermostability, and a broad substrate range. The three β-xylosidases were highly resistant to inhibition by product (xylose) accumulation. Moreover, the combination of xylanase, β-xylosidase, and α-L-arabinofuranosidase exhibited the largest synergistic action on xylan degradation (XynA2, XynB1, and AbfA on oat spelt or beechwood xylan; XynA2, XynB3, and AbfA on birchwood xylan). We have demonstrated that the proposed enzymatic cocktail almost completely converts complex xylan to xylose and arabinofuranose and has great potential for use in the conversion of plant biomass into biofuels and biochemicals.
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Affiliation(s)
- Di Huang
- TEDA Institute of Biological Sciences and Biotechnology, Tianjin Economic-Technological Development Area (TEDA), Nankai University, 23 Hongda Street, Tianjin, 300457, People's Republic of China.
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Tianjin, 300071, People's Republic of China.
- Tianjin Key Laboratory of Microbial Functional Genomics, Tianjin, 300457, People's Republic of China.
- SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300071, People's Republic of China.
| | - Jia Liu
- TEDA Institute of Biological Sciences and Biotechnology, Tianjin Economic-Technological Development Area (TEDA), Nankai University, 23 Hongda Street, Tianjin, 300457, People's Republic of China
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Tianjin, 300071, People's Republic of China
| | - Yanfei Qi
- TEDA Institute of Biological Sciences and Biotechnology, Tianjin Economic-Technological Development Area (TEDA), Nankai University, 23 Hongda Street, Tianjin, 300457, People's Republic of China
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Tianjin, 300071, People's Republic of China
| | - Kexin Yang
- TEDA Institute of Biological Sciences and Biotechnology, Tianjin Economic-Technological Development Area (TEDA), Nankai University, 23 Hongda Street, Tianjin, 300457, People's Republic of China
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Tianjin, 300071, People's Republic of China
| | - Yingying Xu
- TEDA Institute of Biological Sciences and Biotechnology, Tianjin Economic-Technological Development Area (TEDA), Nankai University, 23 Hongda Street, Tianjin, 300457, People's Republic of China
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Tianjin, 300071, People's Republic of China
| | - Lu Feng
- TEDA Institute of Biological Sciences and Biotechnology, Tianjin Economic-Technological Development Area (TEDA), Nankai University, 23 Hongda Street, Tianjin, 300457, People's Republic of China.
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Tianjin, 300071, People's Republic of China.
- Tianjin Key Laboratory of Microbial Functional Genomics, Tianjin, 300457, People's Republic of China.
- SynBio Research Platform, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin, 300071, People's Republic of China.
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22
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Gezae Daful A, Görgens JF. Techno-economic analysis and environmental impact assessment of lignocellulosic lactic acid production. Chem Eng Sci 2017. [DOI: 10.1016/j.ces.2016.12.054] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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23
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Biorefinery-Based Lactic Acid Fermentation: Microbial Production of Pure Monomer Product. SYNTHESIS, STRUCTURE AND PROPERTIES OF POLY(LACTIC ACID) 2017. [DOI: 10.1007/12_2016_11] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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24
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Abdel-Rahman MA, Sonomoto K. Opportunities to overcome the current limitations and challenges for efficient microbial production of optically pure lactic acid. J Biotechnol 2016; 236:176-92. [DOI: 10.1016/j.jbiotec.2016.08.008] [Citation(s) in RCA: 114] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 08/11/2016] [Indexed: 10/21/2022]
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25
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Biotechnological production of enantiomerically pure d-lactic acid. Appl Microbiol Biotechnol 2016; 100:9423-9437. [DOI: 10.1007/s00253-016-7843-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 09/04/2016] [Accepted: 09/07/2016] [Indexed: 12/13/2022]
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26
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Abdel-Rahman MA, Tashiro Y, Zendo T, Sakai K, Sonomoto K. Highly efficient l-lactic acid production from xylose in cell recycle continuous fermentation using Enterococcus mundtii QU 25. RSC Adv 2016. [DOI: 10.1039/c5ra27579b] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
We report an effective cell recycling continuous fermentation of xylose to l-lactic acid with high concentration, productivity, and yield using strain QU 25. pH was found to affect the yield and corn steep liquor as feeding medium enhanced the yield.
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Affiliation(s)
- Mohamed Ali Abdel-Rahman
- Laboratory of Microbial Technology
- Division of Systems Bioengineering
- Department of Bioscience and Biotechnology
- Faculty of Agriculture
- Graduate School
| | - Yukihiro Tashiro
- Laboratory of Soil and Environmental Microbiology
- Division of Systems Bioengineering
- Department of Bioscience and Biotechnology
- Faculty of Agriculture
- Graduate School
| | - Takeshi Zendo
- Laboratory of Microbial Technology
- Division of Systems Bioengineering
- Department of Bioscience and Biotechnology
- Faculty of Agriculture
- Graduate School
| | - Kenji Sakai
- Laboratory of Soil and Environmental Microbiology
- Division of Systems Bioengineering
- Department of Bioscience and Biotechnology
- Faculty of Agriculture
- Graduate School
| | - Kenji Sonomoto
- Laboratory of Microbial Technology
- Division of Systems Bioengineering
- Department of Bioscience and Biotechnology
- Faculty of Agriculture
- Graduate School
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27
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Probst M, Walter A, Dreschke G, Fornasier F, Pümpel T, Walde J, Insam H. End-product inhibition and acidification limit biowaste fermentation efficiency. BIORESOURCE TECHNOLOGY 2015; 198:540-549. [PMID: 26433150 DOI: 10.1016/j.biortech.2015.09.055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Revised: 09/11/2015] [Accepted: 09/12/2015] [Indexed: 06/05/2023]
Abstract
Converting waste to resource may mitigate environmental pollution and global resource limitation. The platform chemical lactic acid can be produced from biowaste and its liquid fraction after solid-liquid separation. A fermentation step for lactic acid production prior to the conversion of biowaste to methane and organic fertilizer would increase the biowaste's value. Despite the huge potential and promising results of the treatment procedure, the reasons for efficiency loss observed previously need to be addressed in order to pave the way for an up-scaling of the fermentation process. Therefore, biowaste was fermented applying pH control, acid extraction and glucose addition in order to counteract reasons such as acidification, end-product inhibition and carbon limitation, respectively. The fermentation was competitive compared to other renewable lactic acid production substrates and reached a maximum productivity of >5 g Clactic acidg(-1)Ch(-1) and a concentration exceeding 30 g L(-1). A combination of acidification and end-product inhibition was identified as major obstacle. Lactobacillus crispatus and its closest relatives were identified as key lactic acid producers within the process using Miseq Illumina sequencing.
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Affiliation(s)
- Maraike Probst
- Institute of Microbiology, University of Innsbruck, Technikerstraße 25d, 6020 Innsbruck, Austria.
| | - Andreas Walter
- Institute of Microbiology, University of Innsbruck, Technikerstraße 25d, 6020 Innsbruck, Austria
| | - Gilbert Dreschke
- Institute of Microbiology, University of Innsbruck, Technikerstraße 25d, 6020 Innsbruck, Austria
| | - Flavio Fornasier
- Consiglio per la Ricerca e la Sperimentazione in Agricoltura, Centro di Ricerca per lo Studio delle Relazioni tra Pianta e Suolo, Via Trieste 23, 34170 Gorizia, Italy
| | - Thomas Pümpel
- Institute of Microbiology, University of Innsbruck, Technikerstraße 25d, 6020 Innsbruck, Austria
| | - Janette Walde
- Department of Statistics, University of Innsbruck, Universitätsstraße 15, 6020 Innsbruck, Austria
| | - Heribert Insam
- Institute of Microbiology, University of Innsbruck, Technikerstraße 25d, 6020 Innsbruck, Austria
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28
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Fed-batch fermentation for enhanced lactic acid production from glucose/xylose mixture without carbon catabolite repression. J Biosci Bioeng 2015; 119:153-8. [DOI: 10.1016/j.jbiosc.2014.07.007] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Revised: 07/14/2014] [Accepted: 07/18/2014] [Indexed: 11/23/2022]
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29
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Yanase H, Araya-Kojima T, Shiwa Y, Watanabe S, Zendo T, Chibazakura T, Shimizu-Kadota M, Sonomoto K, Yoshikawa H. Transcriptional regulation of xylose utilization in Enterococcus mundtii QU 25. RSC Adv 2015. [DOI: 10.1039/c5ra15028k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In the xylose and/or glucose utilization by QU 25,the transcriptional regulation of related genes is involved in the catabolite repression,not in the metabolic shift between homo- and hetero-lactic fermentations.
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Affiliation(s)
- Hiroaki Yanase
- Department of Bioscience
- Tokyo University of Agriculture
- Tokyo 156-8502
- Japan
| | | | - Yuh Shiwa
- Genome Research Center
- NODAI Research Institute
- Tokyo University of Agriculture
- Tokyo 156-8502
- Japan
| | - Satoru Watanabe
- Department of Bioscience
- Tokyo University of Agriculture
- Tokyo 156-8502
- Japan
| | - Takeshi Zendo
- Laboratory of Microbial Technology
- Division of Systems Bioengineering
- Department of Bioscience and Biotechnology
- Faculty of Agriculture
- Graduate School
| | - Taku Chibazakura
- Department of Bioscience
- Tokyo University of Agriculture
- Tokyo 156-8502
- Japan
| | - Mariko Shimizu-Kadota
- Department of Environmental Sciences
- Musashino University
- Tokyo 135-8181
- Japan
- Department of Bioscience
| | - Kenji Sonomoto
- Laboratory of Microbial Technology
- Division of Systems Bioengineering
- Department of Bioscience and Biotechnology
- Faculty of Agriculture
- Graduate School
| | - Hirofumi Yoshikawa
- Department of Bioscience
- Tokyo University of Agriculture
- Tokyo 156-8502
- Japan
- Genome Research Center
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30
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Abdel-Rahman MA, Tashiro Y, Zendo T, Sakai K, Sonomoto K. Enterococcus faecium QU 50: a novel thermophilic lactic acid bacterium for high-yield l-lactic acid production from xylose. FEMS Microbiol Lett 2014; 362:1-7. [DOI: 10.1093/femsle/fnu030] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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31
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Matoba Y, Miyasako M, Matsuo K, Oda K, Noda M, Higashikawa F, Kumagai T, Sugiyama M. An alternative allosteric regulation mechanism of an acidophilic l-lactate dehydrogenase from Enterococcus mundtii 15-1A. FEBS Open Bio 2014; 4:834-47. [PMID: 25379380 PMCID: PMC4219987 DOI: 10.1016/j.fob.2014.08.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 08/28/2014] [Accepted: 08/28/2014] [Indexed: 10/28/2022] Open
Abstract
A plant-derived Enterococcus mundtii 15-1A, that has been previously isolated from Brassica rapa L. subsp. nipposinica (L.H. Bailey) Hanelt var. linearifolia by our group, possesses two kinds of l-lactate dehydrogenase (l-LDH): LDH-1 and LDH-2. LDH-1 was activated under low concentration of fluctose-1,6-bisphosphate (FBP) at both pH 5.5 and 7.5. Although LDH-2 was also activated under the low concentration of FBP at pH 5.5, a high concentration of FBP is necessary to activate it at pH 7.5. The present study shows the crystal structures of the acidophilic LDH-2 in a complex with and without FBP and NADH. Although the tertiary structure of the ligands-bound LDH-2 is similar to that of the active form of other bacterial l-LDHs, the structure without the ligands is different from that of any other previously determined l-LDHs. Major structural alterations between the two structures of LDH-2 were observed at two regions in one subunit. At the N-terminal parts of the two regions, the ligands-bound form takes an α-helical structure, while the form without ligands displays more disordered and extended structures. A vacuum-ultraviolet circular dichroism analysis showed that the α-helix content of LDH-2 in solution is approximately 30% at pH 7.5, which is close to that in the crystal structure of the form without ligands. A D241N mutant of LDH-2, which was created by us to easily form an α-helix at one of the two parts, exhibited catalytic activity even in the absence of FBP at both pH 5.5 and 7.5.
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Key Words
- Allosteric regulation
- B., Bacillus
- Bf., Bifidobacterium
- CD, circular dichroism
- Circular dichroism
- Crystal structure
- E., Escherichia
- Ec., Enterococcus
- FBP, fluctose-1,6-bisphosphate
- LAB, lactic acid bacteria
- LDH, lactate dehydrogenase
- Lactic acid bacteria
- Lb., Lactobacillus
- Lc., Lactococcus
- VUV, vacuum-ultraviolet
- l-Lactate dehydrogenase
- rms, root mean square
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Affiliation(s)
- Yasuyuki Matoba
- Department of Molecular Microbiology and Biotechnology, Graduate School of Biomedical & Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima 734-8551, Japan
| | - Masashi Miyasako
- Department of Molecular Microbiology and Biotechnology, Graduate School of Biomedical & Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima 734-8551, Japan
| | - Koichi Matsuo
- Hiroshima Synchrotron Radiation Center, Hiroshima University, Kagamiyama 2-313, Higashi-Hiroshima 739-0046, Japan
| | - Kosuke Oda
- Department of Molecular Microbiology and Biotechnology, Graduate School of Biomedical & Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima 734-8551, Japan
| | - Masafumi Noda
- Department of Molecular Microbiology and Biotechnology, Graduate School of Biomedical & Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima 734-8551, Japan
| | - Fumiko Higashikawa
- Department of Molecular Microbiology and Biotechnology, Graduate School of Biomedical & Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima 734-8551, Japan
| | - Takanori Kumagai
- Department of Molecular Microbiology and Biotechnology, Graduate School of Biomedical & Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima 734-8551, Japan
| | - Masanori Sugiyama
- Department of Molecular Microbiology and Biotechnology, Graduate School of Biomedical & Health Sciences, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima 734-8551, Japan
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Wang Y, Tashiro Y, Sonomoto K. Fermentative production of lactic acid from renewable materials: recent achievements, prospects, and limits. J Biosci Bioeng 2014; 119:10-8. [PMID: 25077706 DOI: 10.1016/j.jbiosc.2014.06.003] [Citation(s) in RCA: 153] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 06/02/2014] [Accepted: 06/03/2014] [Indexed: 01/26/2023]
Abstract
The development and implementation of renewable materials for the production of versatile chemical resources have gained considerable attention recently, as this offers an alternative to the environmental problems caused by the petroleum industry and the limited supply of fossil resources. Therefore, the concept of utilizing biomass or wastes from agricultural and industrial residues to produce useful chemical products has been widely accepted. Lactic acid plays an important role due to its versatile application in the food, medical, and cosmetics industries and as a potential raw material for the manufacture of biodegradable plastics. Currently, the fermentative production of optically pure lactic acid has increased because of the prospects of environmental friendliness and cost-effectiveness. In order to produce lactic acid with high yield and optical purity, many studies focus on wild microorganisms and metabolically engineered strains. This article reviews the most recent advances in the biotechnological production of lactic acid mainly by lactic acid bacteria, and discusses the feasibility and potential of various processes.
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Affiliation(s)
- Ying Wang
- Laboratory of Microbial Technology, Division of Applied Molecular Microbiology and Biomass Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
| | - Yukihiro Tashiro
- Institute of Advanced Study, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan; Laboratory of Soil Microbiology, Division of Applied Molecular Microbiology and Biomass Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
| | - Kenji Sonomoto
- Laboratory of Microbial Technology, Division of Applied Molecular Microbiology and Biomass Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan; Laboratory of Functional Food Design, Department of Functional Metabolic Design, Bio-Architecture Centre, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan.
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Sakdaronnarong C, Srimarut N, Lucknakhul N, Na-songkla N, Jonglertjunya W. Two-step acid and alkaline ethanolysis/alkaline peroxide fractionation of sugarcane bagasse and rice straw for production of polylactic acid precursor. Biochem Eng J 2014. [DOI: 10.1016/j.bej.2014.02.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Shiwa Y, Yanase H, Hirose Y, Satomi S, Araya-Kojima T, Watanabe S, Zendo T, Chibazakura T, Shimizu-Kadota M, Yoshikawa H, Sonomoto K. Complete genome sequence of Enterococcus mundtii QU 25, an efficient L-(+)-lactic acid-producing bacterium. DNA Res 2014; 21:369-77. [PMID: 24568933 PMCID: PMC4131831 DOI: 10.1093/dnares/dsu003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Enterococcus mundtii QU 25, a non-dairy bacterial strain of ovine faecal origin, can ferment both cellobiose and xylose to produce l-lactic acid. The use of this strain is highly desirable for economical l-lactate production from renewable biomass substrates. Genome sequence determination is necessary for the genetic improvement of this strain. We report the complete genome sequence of strain QU 25, primarily determined using Pacific Biosciences sequencing technology. The E. mundtii QU 25 genome comprises a 3 022 186-bp single circular chromosome (GC content, 38.6%) and five circular plasmids: pQY182, pQY082, pQY039, pQY024, and pQY003. In all, 2900 protein-coding sequences, 63 tRNA genes, and 6 rRNA operons were predicted in the QU 25 chromosome. Plasmid pQY024 harbours genes for mundticin production. We found that strain QU 25 produces a bacteriocin, suggesting that mundticin-encoded genes on plasmid pQY024 were functional. For lactic acid fermentation, two gene clusters were identified—one involved in the initial metabolism of xylose and uptake of pentose and the second containing genes for the pentose phosphate pathway and uptake of related sugars. This is the first complete genome sequence of an E. mundtii strain. The data provide insights into lactate production in this bacterium and its evolution among enterococci.
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Affiliation(s)
- Yuh Shiwa
- Genome Research Center, NODAI Research Institute, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Hiroaki Yanase
- Department of Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Yuu Hirose
- Electronics-Inspired Interdisciplinary Research Institute (EIIRIS), Toyohashi University of Technology, Toyohashi 441-8580, Japan
| | - Shohei Satomi
- Laboratory of Microbial Technology, Division of Applied Molecular Microbiology and Biomass Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
| | - Tomoko Araya-Kojima
- Department of Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Satoru Watanabe
- Department of Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Takeshi Zendo
- Laboratory of Microbial Technology, Division of Applied Molecular Microbiology and Biomass Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
| | - Taku Chibazakura
- Department of Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Mariko Shimizu-Kadota
- Department of Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan Department of Environmental Science, Musashino University, 3-3-3 Ariake, Koto-ku, Tokyo 135-0063, Japan
| | - Hirofumi Yoshikawa
- Genome Research Center, NODAI Research Institute, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan Department of Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Kenji Sonomoto
- Laboratory of Microbial Technology, Division of Applied Molecular Microbiology and Biomass Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan
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Wang Y, Abdel-Rahman MA, Tashiro Y, Xiao Y, Zendo T, Sakai K, Sonomoto K. l-(+)-Lactic acid production by co-fermentation of cellobiose and xylose without carbon catabolite repression using Enterococcus mundtii QU 25. RSC Adv 2014. [DOI: 10.1039/c4ra02764g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We established an effective highl-lactic acid production system based on fed-batch bacterial cultures utilising lignocellulosic biomass-derived mixed sugars without carbon catabolite repression.
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Affiliation(s)
- Ying Wang
- Laboratory of Microbial Technology
- Division of Applied Molecular Microbiology and Biomass Chemistry
- Department of Bioscience and Biotechnology
- Faculty of Agriculture
- Graduate School
| | - Mohamed Ali Abdel-Rahman
- Laboratory of Microbial Technology
- Division of Applied Molecular Microbiology and Biomass Chemistry
- Department of Bioscience and Biotechnology
- Faculty of Agriculture
- Graduate School
| | - Yukihiro Tashiro
- Laboratory of Soil Microbiology
- Division of Applied Molecular Microbiology and Biomass Chemistry
- Department of Bioscience and Biotechnology
- Faculty of Agriculture
- Graduate School
| | - Yaotian Xiao
- Laboratory of Microbial Technology
- Division of Applied Molecular Microbiology and Biomass Chemistry
- Department of Bioscience and Biotechnology
- Faculty of Agriculture
- Graduate School
| | - Takeshi Zendo
- Laboratory of Microbial Technology
- Division of Applied Molecular Microbiology and Biomass Chemistry
- Department of Bioscience and Biotechnology
- Faculty of Agriculture
- Graduate School
| | - Kenji Sakai
- Laboratory of Soil Microbiology
- Division of Applied Molecular Microbiology and Biomass Chemistry
- Department of Bioscience and Biotechnology
- Faculty of Agriculture
- Graduate School
| | - Kenji Sonomoto
- Laboratory of Microbial Technology
- Division of Applied Molecular Microbiology and Biomass Chemistry
- Department of Bioscience and Biotechnology
- Faculty of Agriculture
- Graduate School
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Recent advances in lactic acid production by microbial fermentation processes. Biotechnol Adv 2013; 31:877-902. [DOI: 10.1016/j.biotechadv.2013.04.002] [Citation(s) in RCA: 607] [Impact Index Per Article: 55.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Revised: 04/14/2013] [Accepted: 04/15/2013] [Indexed: 11/18/2022]
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Yang X, Lai Z, Lai C, Zhu M, Li S, Wang J, Wang X. Efficient production of l-lactic acid by an engineered Thermoanaerobacterium aotearoense with broad substrate specificity. BIOTECHNOLOGY FOR BIOFUELS 2013; 6:124. [PMID: 23985133 PMCID: PMC3766646 DOI: 10.1186/1754-6834-6-124] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Accepted: 08/22/2013] [Indexed: 05/25/2023]
Abstract
BACKGROUND Efficient conversion of lignocellulosic biomass to optically pure lactic acid is a key challenge for the economical production of biodegradable poly-lactic acid. A recently isolated strain, Thermoanaerobacterium aotearoense SCUT27, is promising as an efficient lactic acid production bacterium from biomass due to its broad substrate specificity. Additionally, its strictly anaerobic and thermophilic characteristics suppress contamination from other microoragnisms. Herein, we report the significant improvements of concentration and yield in lactic acid production from various lignocellulosic derived sugars, achieved by the carbon flux redirection through homologous recombination in T. aotearoense SCUT27. RESULTS T. aotearoense SCUT27 was engineered to block the acetic acid formation pathway to improve the lactic acid production. The genetic manipulation resulted in 1.8 and 2.1 fold increase of the lactic acid yield using 10 g/L of glucose or 10 g/L of xylose as substrate, respectively. The maximum l-lactic acid yield of 0.93 g/g glucose with an optical purity of 99.3% was obtained by the engineered strain, designated as LA1002, from 50 g/L of substrate, which is very close to the theoretical value (1.0 g/g of glucose). In particular, LA1002 produced lactic acid at an unprecedented concentration up to 3.20 g/L using 10 g/L xylan as the single substrate without any pretreatment after 48 h fermentation. The non-sterilized fermentative production of l-lactic acid was also carried out, achieving values of 44.89 g/L and 0.89 g/g mixed sugar for lactic acid concentration and yield, respectively. CONCLUSIONS Blocking acetic acid formation pathway in T. aotearoense SCUT27 increased l-lactic acid production and yield dramatically. To our best knowledge, this is the best performance of fermentation on lactic acid production using xylan as the sole carbon source, considering the final concentration, yield and fermentation time. In addition, it should be mentioned that the performance of non-sterilized simultaneous fermentation from glucose and xylose was very close to that of normal sterilized cultivation. All these results used the mutant strain, LA1002, indicated that it is a new promising candidate for the effective production of optically pure l-lactic acid from lignocellulosic biomass.
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Affiliation(s)
- Xiaofeng Yang
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
| | - Zhicheng Lai
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
| | - Chaofeng Lai
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
| | - Muzi Zhu
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
| | - Shuang Li
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Jufang Wang
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
| | - Xiaoning Wang
- State Key Laboratory of Kidney, the Institute of Life Sciences, Chinese PLA General Hospital, Beijing 100853, China
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Waste valorization by biotechnological conversion into added value products. Appl Microbiol Biotechnol 2013; 97:6129-47. [DOI: 10.1007/s00253-013-5014-7] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Revised: 05/20/2013] [Accepted: 05/21/2013] [Indexed: 11/25/2022]
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Zhao J, Xu L, Wang Y, Zhao X, Wang J, Garza E, Manow R, Zhou S. Homofermentative production of optically pure L-lactic acid from xylose by genetically engineered Escherichia coli B. Microb Cell Fact 2013; 12:57. [PMID: 23758664 PMCID: PMC3693985 DOI: 10.1186/1475-2859-12-57] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Accepted: 05/21/2013] [Indexed: 12/03/2022] Open
Abstract
Background Polylactic acid (PLA), a biodegradable polymer, has the potential to replace (at least partially) traditional petroleum-based plastics, minimizing “white pollution”. However, cost-effective production of optically pure L-lactic acid is needed to achieve the full potential of PLA. Currently, starch-based glucose is used for L-lactic acid fermentation by lactic acid bacteria. Due to its competition with food resources, an alternative non-food substrate such as cellulosic biomass is needed for L-lactic acid fermentation. Nevertheless, the substrate (sugar stream) derived from cellulosic biomass contains significant amounts of xylose, which is unfermentable by most lactic acid bacteria. However, the microorganisms that do ferment xylose usually carry out heterolactic acid fermentation. As a result, an alternative strain should be developed for homofermentative production of optically pure L-lactic acid using cellulosic biomass. Results In this study, an ethanologenic Escherichia coli strain, SZ470 (ΔfrdBC ΔldhA ΔackA ΔpflB ΔpdhR ::pflBp6-acEF-lpd ΔmgsA), was reengineered for homofermentative production of L-lactic acid from xylose (1.2 mole xylose = > 2 mole L-lactic acid), by deleting the alcohol dehydrogenase gene (adhE) and integrating the L-lactate dehydrogenase gene (ldhL) of Pediococcus acidilactici. The resulting strain, WL203, was metabolically evolved further through serial transfers in screw-cap tubes containing xylose, resulting in the strain WL204 with improved anaerobic cell growth. When tested in 70 g L-1 xylose fermentation (complex medium), WL204 produced 62 g L-1 L-lactic acid, with a maximum production rate of 1.631 g L-1 h-1 and a yield of 97% based on xylose metabolized. HPLC analysis using a chiral column showed that an L-lactic acid optical purity of 99.5% was achieved by WL204. Conclusions These results demonstrated that WL204 has the potential for homofermentative production of L-lactic acid using cellulosic biomass derived substrates, which contain a significant amount of xylose.
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Affiliation(s)
- Jinfang Zhao
- Hubei Provincial Cooperative Innovation Center of Industrial Fermentation, Key Laboratory of Fermentation Engineering (Ministry of Education), College of Bioengineering, Hubei University of Technology, Wuhan 430068, PR China
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Conversion of acid hydrolysate of oil palm empty fruit bunch to L-lactic acid by newly isolated Bacillus coagulans JI12. Appl Microbiol Biotechnol 2013; 97:4831-8. [DOI: 10.1007/s00253-013-4788-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Revised: 01/16/2013] [Accepted: 02/17/2013] [Indexed: 10/27/2022]
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Ye L, Zhou X, Hudari MSB, Li Z, Wu JC. Highly efficient production of L-lactic acid from xylose by newly isolated Bacillus coagulans C106. BIORESOURCE TECHNOLOGY 2013; 132:38-44. [PMID: 23399496 DOI: 10.1016/j.biortech.2013.01.011] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Revised: 12/30/2012] [Accepted: 01/04/2013] [Indexed: 06/01/2023]
Abstract
Cost-effective production of optically pure lactic acid from lignocellulose sugars is commercially attractive but challenging. Bacillus coagulans C106 was isolated from environment and used to produce l-lactic acid from xylose at 50°C and pH 6.0 in mineral salts medium containing 1-2% (w/v) of yeast extract without sterilizing the medium before fermentation. In batch fermentation with 85g/L of xylose, lactic acid titer and productivity reached 83.6g/L and 7.5g/Lh, respectively. When fed-batch (120+80+60g/L) fermentation was applied, they reached 215.7g/L and 4.0g/Lh, respectively. In both cases, the lactic acid yield and optical purity reached 95% and 99.6%, respectively. The lactic acid titer and productivity on xylose are the highest among those ever reported. Ca(OH)2 was found to be a better neutralizing agent than NaOH in terms of its giving higher lactic acid titer (1.2-fold) and productivity (1.8-fold) under the same conditions.
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Affiliation(s)
- Lidan Ye
- Institute of Chemical and Engineering Sciences, Agency for Sciences, Technology and Research, 1 Pesek Road, Jurong Island, Singapore 627833, Singapore
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Abdel-Rahman MA, Tashiro Y, Zendo T, Sonomoto K. Improved lactic acid productivity by an open repeated batch fermentation system using Enterococcus mundtii QU 25. RSC Adv 2013. [DOI: 10.1039/c3ra00078h] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Ohnishi A, Hasegawa Y, Abe S, Bando Y, Fujimoto N, Suzuki M. Hydrogen fermentation using lactate as the sole carbon source: Solution for ‘blind spots’ in biofuel production. RSC Adv 2012. [DOI: 10.1039/c2ra20590d] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Abdel-Rahman MA, Tashiro Y, Sonomoto K. Lactic acid production from lignocellulose-derived sugars using lactic acid bacteria: overview and limits. J Biotechnol 2011; 156:286-301. [PMID: 21729724 DOI: 10.1016/j.jbiotec.2011.06.017] [Citation(s) in RCA: 264] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2011] [Revised: 05/31/2011] [Accepted: 06/17/2011] [Indexed: 10/18/2022]
Abstract
Lactic acid is an industrially important product with a large and rapidly expanding market due to its attractive and valuable multi-function properties. The economics of lactic acid production by fermentation is dependent on many factors, of which the cost of the raw materials is very significant. It is very expensive when sugars, e.g., glucose, sucrose, starch, etc., are used as the feedstock for lactic acid production. Therefore, lignocellulosic biomass is a promising feedstock for lactic acid production considering its great availability, sustainability, and low cost compared to refined sugars. Despite these advantages, the commercial use of lignocellulose for lactic acid production is still problematic. This review describes the "conventional" processes for producing lactic acid from lignocellulosic materials with lactic acid bacteria. These processes include: pretreatment of the biomass, enzyme hydrolysis to obtain fermentable sugars, fermentation technologies, and separation and purification of lactic acid. In addition, the difficulties associated with using this biomass for lactic acid production are especially introduced and several key properties that should be targeted for low-cost and advanced fermentation processes are pointed out. We also discuss the metabolism of lignocellulose-derived sugars by lactic acid bacteria.
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Affiliation(s)
- Mohamed Ali Abdel-Rahman
- Laboratory of Microbial Technology, Division of Applied Molecular Microbiology and Biomass Chemistry, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, Hakozaki, Higashi-ku, Fukuoka, Japan
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