1
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Wang ZD, Wang BT, Jin L, Ruan HH, Jin FJ. Implications of carbon catabolite repression for Aspergillus-based cell factories: A review. Biotechnol J 2024; 19:e2300551. [PMID: 38403447 DOI: 10.1002/biot.202300551] [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: 10/11/2023] [Revised: 12/19/2023] [Accepted: 12/26/2023] [Indexed: 02/27/2024]
Abstract
Carbon catabolite repression (CCR) is a global regulatory mechanism that allows organisms to preferentially utilize a preferred carbon source (usually glucose) by suppressing the expression of genes associated with the utilization of nonpreferred carbon sources. Aspergillus is a large genus of filamentous fungi, some species of which have been used as microbial cell factories for the production of organic acids, industrial enzymes, pharmaceuticals, and other fermented products due to their safety, substrate convenience, and well-established post-translational modifications. Many recent studies have verified that CCR-related genetic alterations can boost the yield of various carbohydrate-active enzymes (CAZymes), even under CCR conditions. Based on these findings, we emphasize that appropriate regulation of the CCR pathway, especially the expression of the key transcription factor CreA gene, has great potential for further expanding the application of Aspergillus cell factories to develop strains for industrial CAZymes production. Further, the genetically modified CCR strains (chassis hosts) can also be used for the production of other useful natural products and recombinant proteins, among others. We here review the regulatory mechanisms of CCR in Aspergillus and its direct application in enzyme production, as well as its potential application in organic acid and pharmaceutical production to illustrate the effects of CCR on Aspergillus cell factories.
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Affiliation(s)
- Zhen-Dong Wang
- College of Ecology and Environment, Nanjing Forestry University, Nanjing, China
| | - Bao-Teng Wang
- College of Ecology and Environment, Nanjing Forestry University, Nanjing, China
| | - Long Jin
- College of Ecology and Environment, Nanjing Forestry University, Nanjing, China
| | - Hong-Hua Ruan
- College of Ecology and Environment, Nanjing Forestry University, Nanjing, China
| | - Feng-Jie Jin
- College of Ecology and Environment, Nanjing Forestry University, Nanjing, China
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2
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Corbu VM, Gheorghe-Barbu I, Dumbravă AȘ, Vrâncianu CO, Șesan TE. Current Insights in Fungal Importance-A Comprehensive Review. Microorganisms 2023; 11:1384. [PMID: 37374886 DOI: 10.3390/microorganisms11061384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 05/20/2023] [Accepted: 05/22/2023] [Indexed: 06/29/2023] Open
Abstract
Besides plants and animals, the Fungi kingdom describes several species characterized by various forms and applications. They can be found in all habitats and play an essential role in the excellent functioning of the ecosystem, for example, as decomposers of plant material for the cycling of carbon and nutrients or as symbionts of plants. Furthermore, fungi have been used in many sectors for centuries, from producing food, beverages, and medications. Recently, they have gained significant recognition for protecting the environment, agriculture, and several industrial applications. The current article intends to review the beneficial roles of fungi used for a vast range of applications, such as the production of several enzymes and pigments, applications regarding food and pharmaceutical industries, the environment, and research domains, as well as the negative impacts of fungi (secondary metabolites production, etiological agents of diseases in plants, animals, and humans, as well as deteriogenic agents).
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Affiliation(s)
- Viorica Maria Corbu
- Genetics Department, Faculty of Biology, University of Bucharest, 060101 Bucharest, Romania
- Research Institute of the University of Bucharest-ICUB, 91-95 Spl. Independentei, 050095 Bucharest, Romania
| | - Irina Gheorghe-Barbu
- Research Institute of the University of Bucharest-ICUB, 91-95 Spl. Independentei, 050095 Bucharest, Romania
- Department of Microbiology and Immunology, Faculty of Biology, University of Bucharest, 060101 Bucharest, Romania
| | - Andreea Ștefania Dumbravă
- Department of Microbiology and Immunology, Faculty of Biology, University of Bucharest, 060101 Bucharest, Romania
| | - Corneliu Ovidiu Vrâncianu
- Research Institute of the University of Bucharest-ICUB, 91-95 Spl. Independentei, 050095 Bucharest, Romania
- Department of Microbiology and Immunology, Faculty of Biology, University of Bucharest, 060101 Bucharest, Romania
| | - Tatiana Eugenia Șesan
- Department of Microbiology and Immunology, Faculty of Biology, University of Bucharest, 060101 Bucharest, Romania
- Academy of Agricultural Sciences and Forestry, 61 Bd. Mărăşti, District 1, 011464 Bucharest, Romania
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3
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Low pH Stress Enhances Gluconic Acid Accumulation with Enzymatic Hydrolysate as Feedstock Using Gluconobacter oxydans. FERMENTATION-BASEL 2023. [DOI: 10.3390/fermentation9030278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
Abstract
Gluconic acid has been increasingly in demand in recent years due to the wide applications in the food, healthcare and construction industries. Plant-derived biomass is rich in biopolymers that comprise glucose as the monomeric unit, which provide abundant feedstock for gluconic acid production. Gluconobacter oxydans can rapidly and incompletely oxidize glucose to gluconic acid and it is regarded as ideal industrial microorganism. Once glucose is depleted, the gluconic acid will be further bio-oxidized to 2-ketogluconic acid by Gluconobacter oxydans. The endpoint is difficult to be controlled, especially in an industrial fermentation process. In this study, it was found that the low pH environment (2.5~3.5) could limit the further metabolism of gluconic acid and that it resulted in a yield over 95%. Therefore, the low pH stress strategy for efficiently producing gluconic acid from biomass-derived glucose was put forward and investigated with enzymatic hydrolysate. As a result, 98.8 g/L gluconic acid with a yield of 96% could be obtained from concentrated corncob enzymatic hydrolysate that initially contained 100 g/L glucose with 1.4 g/L cells loading of Gluconobacter oxydans. In addition, the low pH stress strategy could effectively control end-point and decrease the risk of microbial contamination. Overall, this strategy provides a potential for industrial gluconic acid production from lignocellulosic materials.
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4
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Valorisation of Corncob Residue towards the Sustainable Production of Glucuronic Acid. Catalysts 2022. [DOI: 10.3390/catal12121603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The production of glucuronic acid (GA) directly from actual biomass via chemocatalysis is of great significance to the effective valorisation of biomass for a sustainable future. Herein, we have developed a one-step strategy for the conversion of cellulose in corncob residue into GA with the cooperation of Au/CeO2 and maleic acid, achieving a 60.3% yield. Experimental and density functional theory (DFT) results show that maleic acid is effective in the fractionation of cellulose from corncob residue and the depolymerisation of cellulose fragments to glucose, on account of the good capacity for proton migration. Au/CeO2 is responsible for the selective oxidation of glucose to GA, in which the formation of glucaric acid is restrained, due to the weak capacity of Au/CeO2 on the proton transfer without the occurrence of the ring-opening reaction of glucose. Therefore, the relay catalysis of Au/CeO2 and maleic acid enables the production of GA via the complex cascade reactions. This work may provide insight regarding the conversion of actual biomass to targeted products.
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5
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Ojewumi ME, Emetere ME, Obanla OR, Babatunde DE, Adimekwe EG. Bio-Conversion of Waste Paper Into Fermentable Sugars—A Review. FRONTIERS IN CHEMICAL ENGINEERING 2022. [DOI: 10.3389/fceng.2022.926400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Pollution generated by solid waste has become a massive source of concern worldwide as the amount of waste being generated has become overwhelming. Waste paper contributes significantly to the overall solid municipal waste being generated daily and with control methods that are equally bad for the environment or just plain ineffective; better, effective, and environmentally friendly control solutions are required. This study reviews the use of various microorganisms as they aid in the control of waste papers in an environmentally conscious way. In addition to being an environmentally friendly solution to the issue of solid waste paper pollution, it is also a prominent source of renewable energy in the conversion of paper into fermentable sugars for the production of bio-ethanol. This review examines the vital revolution in the enzymatic hydrolysis of paper to sugar. Salient challenges that involve bioconversion were highlighted and a few solutions were suggested.
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6
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Ma Y, Li B, Zhang X, Wang C, Chen W. Production of Gluconic Acid and Its Derivatives by Microbial Fermentation: Process Improvement Based on Integrated Routes. Front Bioeng Biotechnol 2022; 10:864787. [PMID: 35651548 PMCID: PMC9149244 DOI: 10.3389/fbioe.2022.864787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 04/14/2022] [Indexed: 11/13/2022] Open
Abstract
Gluconic acid (GA) and its derivatives, as multifunctional biological chassis compounds, have been widely used in the food, medicine, textile, beverage and construction industries. For the past few decades, the favored production means of GA and its derivatives are microbial fermentation using various carbon sources containing glucose hydrolysates due to high-yield GA production and mature fermentation processes. Advancements in improving fermentation process are thriving which enable more efficient and economical industrial fermentation to produce GA and its derivatives, such as the replacement of carbon sources with agro-industrial byproducts and integrated routes involving genetically modified strains, cascade hydrolysis or micro- and nanofiltration in a membrane unit. These efforts pave the way for cheaper industrial fermentation process of GA and its derivatives, which would expand the application and widen the market of them. This review summarizes the recent advances, points out the existing challenges and provides an outlook on future development regarding the production of GA and its derivatives by microbial fermentation, aiming to promote the combination of innovative production of GA and its derivatives with industrial fermentation in practice.
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Affiliation(s)
- Yan Ma
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Bing Li
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Xinyue Zhang
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
| | - Chao Wang
- Dongcheng District Center for Disease Control and Prevention, Beijing, China
- *Correspondence: Chao Wang, ; Wei Chen,
| | - Wei Chen
- School of Marine Science and Engineering, Qingdao Agricultural University, Qingdao, China
- *Correspondence: Chao Wang, ; Wei Chen,
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7
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Binczarski MJ, Malinowska J, Stanishevsky A, Severino CJ, Yager R, Cieslak M, Witonska IA. A Model Procedure for Catalytic Conversion of Waste Cotton into Useful Chemicals. MATERIALS 2021; 14:ma14081981. [PMID: 33920963 PMCID: PMC8071283 DOI: 10.3390/ma14081981] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 03/30/2021] [Accepted: 04/12/2021] [Indexed: 11/16/2022]
Abstract
Cotton is grown in about 90 countries and accounts for 24% of the fibers used in the global production of textiles. In 2018/2019, 25.8 Mt of cotton were produced around the world. Since this natural product consists mainly of cellulose, it can be used as a raw material in the so-called “sugar economy”. This paper discusses a model procedure for thermally assisted acidic hydrolysis of cotton into glucose and subsequent oxidation of the glucose into calcium gluconate over Pd-Au/SiO2 catalyst. In the first step, H2SO4 was used as a catalyst for hydrolysis. The cotton hydrolysates were neutralized using CaCO3 and applied as a substrate in the second step, where glucose was oxidized over Pd-Au/SiO2 prepared by ultrasound assisted co-impregnation. With the appropriate Au/Pd molar ratio, small crystallites of palladium and gold were created which were active and selective towards the formation of gluconate ions. This approach to the transformation of glucose represents as a viable alternative to biological processes using fungal and bacterial species, which are sensitive to the presence of inhibitors such as furfurals and levulinic acid in hydrolysates.
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Affiliation(s)
- Michal J. Binczarski
- Institute of General and Ecological Chemistry, Lodz University of Technology, 116 Zeromskiego Street, 90-924 Lodz, Poland; (M.J.B.); (J.M.)
| | - Justyna Malinowska
- Institute of General and Ecological Chemistry, Lodz University of Technology, 116 Zeromskiego Street, 90-924 Lodz, Poland; (M.J.B.); (J.M.)
| | - Andrei Stanishevsky
- Department of Physics, University of Alabama at Birmingham, 1300 University Blvd., Birmingham, AL 35294, USA; (A.S.); (C.J.S.); (R.Y.)
| | - Courtney J. Severino
- Department of Physics, University of Alabama at Birmingham, 1300 University Blvd., Birmingham, AL 35294, USA; (A.S.); (C.J.S.); (R.Y.)
| | - Riley Yager
- Department of Physics, University of Alabama at Birmingham, 1300 University Blvd., Birmingham, AL 35294, USA; (A.S.); (C.J.S.); (R.Y.)
| | - Malgorzata Cieslak
- ŁUKASIEWICZ Research Network—Textile Institute, Department of Textile Chemical Technologies, 118 Gdanska Street, 90-520 Lodz, Poland;
| | - Izabela A. Witonska
- Institute of General and Ecological Chemistry, Lodz University of Technology, 116 Zeromskiego Street, 90-924 Lodz, Poland; (M.J.B.); (J.M.)
- Correspondence: ; Tel.: +48-42-631-3094
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8
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Sandu MP, Kovtunov MA, Gromov NV, Kurzina IA. Effects of external parameters and mass-transfer on the glucose oxidation process catalyzed by Pd–Bi/Al 2O 3. NEW J CHEM 2021. [DOI: 10.1039/d1nj04103g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work describes the effect of reaction parameters on glucose oxidation in the presence of a Pd3 : Bi1/Al2O3 catalyst.
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Affiliation(s)
- Mariya P. Sandu
- National Research Tomsk State University, 36 Prospekt Lenina, 634050, Tomsk, Russia
- Siberian State Medical University, 2 Moskovsky Trakt, 634050, Tomsk, Russia
| | - Mikhail A. Kovtunov
- National Research Tomsk State University, 36 Prospekt Lenina, 634050, Tomsk, Russia
| | - Nikolay V. Gromov
- Boreskov Institute of Catalysis SB RAS, 5 Prospekt Lavrentieva, 630090, Novosibirsk, Russia
| | - Irina A. Kurzina
- National Research Tomsk State University, 36 Prospekt Lenina, 634050, Tomsk, Russia
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9
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Swine manure valorization in fabrication of nutrition and energy. Appl Microbiol Biotechnol 2020; 104:9921-9933. [PMID: 33074416 DOI: 10.1007/s00253-020-10963-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 10/08/2020] [Accepted: 10/12/2020] [Indexed: 12/11/2022]
Abstract
Renewable energy can boost the growing population's need and rapid budgetary development. To reduce fossil fuel consumption is the initial purpose of renewable and sustainable energy, producing valuable bio-based products. The fermenters, using for pretreatment of swine manure, and involvement of swine carcasses are reported to enhance organic loading rate followed by improved biogas yield on household digesters. The compositions such as animal residues, pathogenic microbes, pharmaceutical residues and nutrient compositions including undigested feed are still confused. Therefore, it is mandatory to optimize and stabilize anaerobic practice and digestate filtration purification for consequential fertilizer consumption. The effective bio-methane recovery from energy-rich compounds is challenging due to slow degradation procedures. The pretreatment procedure could enhance lipid depolymerization and improve anaerobic fermentation. This article deeply focuses on biodegradation of swine manure. The components of this manure were evaluated and established several approaches to improve biogas production. Furthermore, recycling of co-digestates was discussed in detail as fertilizer consumption including hygienic aspects of manure and pretreatment strategies of biomass residues. KEY POINTS: • Co-digestion of manure and carcasses enhance bio-methane production. • Removel of ammonia from biogas digester may improve bio-methane gas. • A strong antimicrobial influence has been reported on biogas production.
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10
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Qin Y, Li Q, Luo F, Fu Y, He H. One-step purification of two novel thermotolerant β-1,4-glucosidases from a newly isolated strain of Fusarium chlamydosporum HML278 and their characterization. AMB Express 2020; 10:182. [PMID: 33030626 PMCID: PMC7544787 DOI: 10.1186/s13568-020-01116-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 09/24/2020] [Indexed: 01/07/2023] Open
Abstract
A newly identified cellulase-producing Fusarium chlamydosporum HML278 was cultivated under solid-state fermentation of sugarcane bagasse, and two new β-glucosides enzymes (BG FH1, BG FH2) were recovered from fermentation solution by modified non-denaturing active gel electrophoresis and gel filtration chromatography. SDS-PAGE analysis showed that the molecular weight of BG FH1 and BG FH2 was 93 kDa and 52 kDa, respectively, and the enzyme activity was 5.6 U/mg and 11.5 U/mg, respectively. The optimal reaction temperature of the enzymes was 60 ℃, and the enzymes were stable with a temperature lower than 70 ℃. The optimal pH of the purified enzymes was 6.0, and the enzymes were stable between pH 4–10. Km and Vmax values were 2.76 mg/mL and 20.6 U/mg for pNPG, respectively. Thin-layer chromatography and high-performance liquid chromatography analysis showed that BG FH1and BG FH2 had hydrolysis activity toward cellobiose and could hydrolyze cellobiose into glucose. In addition, both enzymes exhibited transglycoside activity, which could use glucose to synthesize cellobiose and cellotriose, and preferentially synthesize alcohol. In conclusion, our study demonstrated that F. chlamydosporum HML278 produces heat-resistant β-glucosidases with both hydrolytic activity and transglycosidic activity, and these β-glucosidases have potential application in bioethanol and papermaking industries.
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11
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Jiang T, Yuan Y, Liu S, Hunt AJ, Tan G. Deposition of Palladium Nanoparticles by the Coating of the Carbonaceous Layer from Wastepaper-Derived Bio-Oil. ACS OMEGA 2020; 5:16021-16029. [PMID: 32656423 PMCID: PMC7346257 DOI: 10.1021/acsomega.0c01437] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 06/11/2020] [Indexed: 06/11/2023]
Abstract
A highly active and recyclable Pd-deposited catalyst has been successfully prepared for the Heck reaction. Bio-oil liquid, a byproduct from the microwave pyrolysis of wastepaper, is employed to immobilize palladium nanoparticles on a solid support. FTIR, GC, and NMR results indicate the self-polymerization feature of bio-oil, thus giving rise to a uniform carbonaceous layer coated around the surface of the catalyst. Characteristic analysis of the catalyst indicates that palladium nanoparticles are well-dispersed on the parent SBA-15 solid substrate, which is attributed to the carbonaceous layer that is derived from bio-oil carbonization, allowing a high catalytic performance as a heterogeneous catalyst for the Heck reaction. The as-synthesized catalyst demonstrates remarkable recyclability with firm deposition of palladium nanoparticles on the solid support and could be reused without a dramatic decrease in catalytic activity.
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Affiliation(s)
- Tengyao Jiang
- Department
of Civil and Architectural Engineering, University of Wyoming, 1000 E. University Avenue, Dept. 3295, Laramie, Wyoming 82071, United States
- Green
Chemistry Centre of Excellence, Department of Chemistry, University of York, York YO10 5DD, UK
| | - Yuan Yuan
- Green
Chemistry Centre of Excellence, Department of Chemistry, University of York, York YO10 5DD, UK
- Marine
Agriculture Research Center, Tobacco Research
Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Sijia Liu
- Department
of Civil and Architectural Engineering, University of Wyoming, 1000 E. University Avenue, Dept. 3295, Laramie, Wyoming 82071, United States
| | - Andrew J. Hunt
- Green
Chemistry Centre of Excellence, Department of Chemistry, University of York, York YO10 5DD, UK
| | - Gang Tan
- Department
of Civil and Architectural Engineering, University of Wyoming, 1000 E. University Avenue, Dept. 3295, Laramie, Wyoming 82071, United States
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12
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Zhao T, Tashiro Y, Sonomoto K. Smart fermentation engineering for butanol production: designed biomass and consolidated bioprocessing systems. Appl Microbiol Biotechnol 2019; 103:9359-9371. [PMID: 31720773 DOI: 10.1007/s00253-019-10198-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 10/08/2019] [Accepted: 10/15/2019] [Indexed: 12/18/2022]
Abstract
There is a renewed interest in acetone-butanol-ethanol (ABE) fermentation from renewable substrates for the sustainable and environment-friendly production of biofuel and platform chemicals. However, the ABE fermentation is associated with several challenges due to the presence of heterogeneous components in the renewable substrates and the intrinsic characteristics of ABE fermentation process. Hence, there is a need to select optimal substrates and modify their characteristics suitable for the ABE fermentation process or microbial strain. This "designed biomass" can be used to establish the consolidated bioprocessing systems. As there are very few reports on designed biomass, the main objectives of this review are to summarize the main challenges associated with ABE fermentation from renewable substrates and to introduce feasible strategies for designing the substrates through pretreatment and hydrolysis technologies as well as through the establishment of consolidated bioprocessing systems. This review offers new insights on improving the efficiency of ABE fermentation from designed renewable substrates.
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Affiliation(s)
- Tao Zhao
- 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.,Energy-rich Compounds Production by Photosynthetic Carbon Fixation Research Center, College of Life Science, Qingdao Agricultural University, No. 700 Changcheng Road, Chengyang District, Qingdao, 266109, China
| | - Yukihiro Tashiro
- Laboratory of Soil and Environmental Microbiology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.,Laboratory of Microbial Environmental Protection, Tropical Microbiology Unit, Center for International Education and Research of Agriculture, Faculty of Agriculture, 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.
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13
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Emerging technologies for the pretreatment of lignocellulosic materials for bio-based products. Appl Microbiol Biotechnol 2019; 104:455-473. [DOI: 10.1007/s00253-019-10158-w] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 09/19/2019] [Accepted: 09/24/2019] [Indexed: 10/25/2022]
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14
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Kumar A, Chaturvedi AK, Yadav K, Arunkumar KP, Malyan SK, Raja P, Kumar R, Khan SA, Yadav KK, Rana KL, Kour D, Yadav N, Yadav AN. Fungal Phytoremediation of Heavy Metal-Contaminated Resources: Current Scenario and Future Prospects. RECENT ADVANCEMENT IN WHITE BIOTECHNOLOGY THROUGH FUNGI 2019. [DOI: 10.1007/978-3-030-25506-0_18] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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15
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Tian X, Shen Y, Zhuang Y, Zhao W, Hang H, Chu J. Kinetic analysis of sodium gluconate production by Aspergillus niger with different inlet oxygen concentrations. Bioprocess Biosyst Eng 2018; 41:1697-1706. [PMID: 30062601 DOI: 10.1007/s00449-018-1993-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 07/25/2018] [Indexed: 11/27/2022]
Abstract
To further understand fermentation kinetics of sodium gluconate (SG) production by Aspergillus niger with different inlet oxygen concentrations, logistic model for cell growth and two-step models for SG production and glucose consumption were established. The results demonstrated that the maximum specific growth rate (µm) presented exponential relationship with inlet oxygen concentration and the maximum biomass (Xm) exhibited linear increase. In terms of SG production, two-step model with Luedeking-Piret equation during growth phase and oxygen-dependent equation during stationary phase could well fit the experimental data. Notably, high inlet oxygen concentration exponentially improved SG yield (YP/S), whereas biomass yield to glucose (YX/S) and cell maintenance coefficient (m) were almost independent on inlet oxygen concentration, indicating that high oxygen supply enhancing SG synthesis not only functioning as a substrate directly, but also regulating glucose metabolism towards SG formation. Finally, the applicability and predictability of the proposed models were further validated by additional experiments.
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Affiliation(s)
- Xiwei Tian
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, P.O. box 329, Shanghai, 200237, People's Republic of China
| | - Yuting Shen
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, P.O. box 329, Shanghai, 200237, People's Republic of China
| | - Yingping Zhuang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, P.O. box 329, Shanghai, 200237, People's Republic of China
| | - Wei Zhao
- Shan Dong Fuyang Biological Technology Co., ltd, Dezhou, China
| | - Haifeng Hang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, P.O. box 329, Shanghai, 200237, People's Republic of China.
| | - Ju Chu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, P.O. box 329, Shanghai, 200237, People's Republic of China.
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16
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Polyurethane elastomer composites reinforced with waste natural cellulosic fibers from office paper in thermal properties. Carbohydr Polym 2018; 197:385-394. [PMID: 30007627 DOI: 10.1016/j.carbpol.2018.06.036] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 05/12/2018] [Accepted: 06/06/2018] [Indexed: 11/27/2022]
Abstract
Polyurethane elastomer (PUE) composites were synthesized with a low additive content of waste natural cellulosic fibers from office paper. A new technology combining prepolymer method with physical blending and modification was adopted. The results showed that cellulosic fibers were covalently bonded to polyurethane molecular chains and served as a cross-linking agent making the degree of phase separation decrease. Even so, the lowest additive content of cellulosic fibers (1 wt%) in this work could make polyurethane still hold a certain degree of phase separation. Besides, thermal stability of polyurethane was improved from 288 to around 300 °C even at the low cellulosic fibers content. PUE with 3% cellulosic fibers had the better interfacial compatibility between cellulosic fibers and polyurethane causing the greater thermal reinforcement. PUE with 4% and 5% cellulosic fibers had the worse interfacial compatibility generating the better damping capacity indicating that cellulosic fibers could improve damping performance of polyurethane, especially polyurethane with 5 wt% fibers. It meant that cellulosic fibers had a potential application in damping materials.
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17
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Han X, Liu G, Pan Y, Song W, Qu Y. Consolidated bioprocessing for sodium gluconate production from cellulose using Penicillium oxalicum. BIORESOURCE TECHNOLOGY 2018; 251:407-410. [PMID: 29258710 DOI: 10.1016/j.biortech.2017.12.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 12/09/2017] [Accepted: 12/11/2017] [Indexed: 06/07/2023]
Abstract
The feasibility of consolidated bioprocessing for sodium gluconate production from cellulose was studied. A recombinant strain named z19 was constructed from Penicillium oxalicum wild-type strain 114-2 for simultaneous expression of glucose oxidase and catalase from Aspergillus niger. While keeping a cellulolytic ability similar with that of 114-2, z19 secreted certain amounts of glucose oxidase and catalase. Fed-batch and two-stage temperature control strategy (0-120 h, 30 °C; 120-192 h, 45 °C) was utilized for sodium gluconate production from cellulose (filter paper power), with 13.54 g/L of sodium gluconate obtained at the end of the fermentation. The results provide an alternative route for producing sodium gluconate from cellulose in a one-pot reaction.
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Affiliation(s)
- Xiaolong Han
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China; School of Life Science, Qufu Normal University, Qufu 273165, China
| | - Guodong Liu
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China
| | - Yunjun Pan
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China; National Glycoengineering Research Center, Shandong University, Jinan 250100, China
| | - Wenxia Song
- School of Life Science, Qufu Normal University, Qufu 273165, China
| | - Yinbo Qu
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China; National Glycoengineering Research Center, Shandong University, Jinan 250100, China.
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18
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Han X, Liu G, Song W, Qu Y. Production of sodium gluconate from delignified corn cob residue by on-site produced cellulase and co-immobilized glucose oxidase and catalase. BIORESOURCE TECHNOLOGY 2018; 248:248-257. [PMID: 28716292 DOI: 10.1016/j.biortech.2017.06.109] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 06/13/2017] [Accepted: 06/14/2017] [Indexed: 06/07/2023]
Abstract
The production of sodium gluconate by enzymatic catalysis of delignified corn cob residue (DCCR) hydrolysate was studied. Penicillium oxalicum I1-13 was used for the production of cellulase with high β-glucosidase activity. A fed-batch saccharification process was developed to obtain high yields of glucose. At the end of hydrolysis, the concentration of glucose reached 145.80g/L. Glucose oxidase and catalase were co-immobilized to catalyze DCCR hydrolysate to produce sodium gluconate. Under the optimum conditions, 166.87g/L sodium gluconate was obtained after 56h of reaction, with a yield of 98.24%. The immobilized enzymes could still maintain more than 60% of the activity after repeated use for 6 times. This study provides a potential route for the production of valuable chemicals by enzymatic conversion of lignocellulosic materials.
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Affiliation(s)
- Xiaolong Han
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China
| | - Guodong Liu
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China
| | - Wenxia Song
- School of Life Science, Qufu Normal University, Qufu 273165, China
| | - Yinbo Qu
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
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19
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Liu X, Tian X, Hang H, Zhao W, Wang Y, Chu J. Influence of initial glucose concentration on seed culture of sodium gluconate production by Aspergillus niger. BIORESOUR BIOPROCESS 2017. [DOI: 10.1186/s40643-017-0185-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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20
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Lei W, Fang C, Zhou X, Yin Q, Pan S, Yang R, Liu D, Ouyang Y. Cellulose nanocrystals obtained from office waste paper and their potential application in PET packing materials. Carbohydr Polym 2017; 181:376-385. [PMID: 29253986 DOI: 10.1016/j.carbpol.2017.10.059] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 09/19/2017] [Accepted: 10/16/2017] [Indexed: 11/17/2022]
Abstract
Annually a tremendous amount of office waste paper (OWP) is discarded creating environmental pollution. Therefore, how to make this paper from waste to wealth and use it in new approaches have become a meaningful and challenging work. In this work, OWP being a cellulose rich biomass was employed for the production of cellulose nanocrystals (CNCs) by acid hydrolysis with different acid concentrations but without subjecting OWP to alkali and bleaching treatments. The testing results showed that CNCs prepared using sulfuric acid concentration of 59% with respect to OWP had the highest crystallinity and this concentration was the transition concentration for the production of opaque CNCs film with convoluted nanofibers to transparent one with orientated nanofibers. Besides, CNCs prepared using acid concentration of 65% coated on PET sheet not only had a better water vapor barrier property but also was on a par with the transparency of PET, which was hopeful to be used as coating materials in packaging materials.
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Affiliation(s)
- Wanqing Lei
- School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an 710048, PR China
| | - Changqing Fang
- School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an 710048, PR China; Faculty of Printing, Packing Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, PR China.
| | - Xing Zhou
- School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an 710048, PR China; Faculty of Printing, Packing Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, PR China
| | - Qian Yin
- Faculty of Printing, Packing Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, PR China
| | - Shaofei Pan
- Faculty of Printing, Packing Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, PR China
| | - Rong Yang
- Faculty of Printing, Packing Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, PR China
| | - Donghong Liu
- Fuli Institute of Food Science, Zhejiang University, Hang Zhou 310058, PR China.
| | - Yun Ouyang
- Beijing Key Laboratory of Packaging and Printing New Technology & Key Laboratory of Printing Environmental Protection Technology, China Academy of Printing Technology, Beijing 100000, PR China
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21
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Oxygen-enriched fermentation of sodium gluconate by Aspergillus niger and its impact on intracellular metabolic flux distributions. Bioprocess Biosyst Eng 2017; 41:77-86. [DOI: 10.1007/s00449-017-1845-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 09/21/2017] [Indexed: 12/27/2022]
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22
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Gluconic acid: Properties, production methods and applications—An excellent opportunity for agro-industrial by-products and waste bio-valorization. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.08.028] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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23
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Lu F, Li C, Wang Z, Zhao W, Chu J, Zhuang Y, Zhang S. High efficiency cell-recycle continuous sodium gluconate production by Aspergillus niger using on-line physiological parameters association analysis to regulate feed rate rationally. BIORESOURCE TECHNOLOGY 2016; 220:433-441. [PMID: 27611026 DOI: 10.1016/j.biortech.2016.08.062] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 08/14/2016] [Accepted: 08/16/2016] [Indexed: 06/06/2023]
Abstract
In this paper, a system of cell-recycle continuous fermentation for sodium gluconate (SG) production by Aspergillus niger (A. niger) was established. Based on initial continuous fermentation result (100.0h) with constant feed rate, an automatic feedback strategy to regulate feed rate using on-line physiological parameters (OUR and DO) was proposed and applied successfully for the first time in the improved continuous fermentation (240.5h). Due to less auxiliary time, highest SG production rate (31.05±0.29gL(-1)h(-1)) and highest yield (0.984±0.067molmol(-1)), overall SG production capacity (975.8±5.8gh(-1)) in 50-L fermentor of improved continuous fermentation increased more than 300.0% compared to that of batch fermentation. Improvement of mass transfer and dispersed mycelia morphology were the two major reasons responsible for the high SG production rate. This system had been successfully applied to industrial fermentation and SG production was greatly improved.
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Affiliation(s)
- Fei Lu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, P.O. box 329, 130 Meilong Road, Shanghai 200237, China
| | - Chao Li
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, P.O. box 329, 130 Meilong Road, Shanghai 200237, China
| | - Zejian Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, P.O. box 329, 130 Meilong Road, Shanghai 200237, China
| | - Wei Zhao
- Shan Dong Fuyang Biological Technology Co., Ltd, China
| | - Ju Chu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, P.O. box 329, 130 Meilong Road, Shanghai 200237, China.
| | - Yingping Zhuang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, P.O. box 329, 130 Meilong Road, Shanghai 200237, China
| | - Siliang Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, P.O. box 329, 130 Meilong Road, Shanghai 200237, China
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24
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Feng J, Le D, Nguyen ST, Tan Chin Nien V, Jewell D, Duong HM. Silicacellulose hybrid aerogels for thermal and acoustic insulation applications. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.06.052] [Citation(s) in RCA: 122] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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25
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Ferreira JA, Mahboubi A, Lennartsson PR, Taherzadeh MJ. Waste biorefineries using filamentous ascomycetes fungi: Present status and future prospects. BIORESOURCE TECHNOLOGY 2016; 215:334-345. [PMID: 26996263 DOI: 10.1016/j.biortech.2016.03.018] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 02/26/2016] [Accepted: 03/01/2016] [Indexed: 05/11/2023]
Abstract
Filamentous ascomycetes fungi have had important roles in natural cycles, and are already used industrially for e.g. supplying of citric, gluconic and itaconic acids as well as many enzymes. Faster human activities result in higher consumption of our resources and producing more wastes. Therefore, these fungi can be explored to use their capabilities to convert back wastes to resources. The present paper reviews the capabilities of these fungi in growing on various residuals, producing lignocellulose-degrading enzymes and production of organic acids, ethanol, pigments, etc. Particular attention has been on Aspergillus, Fusarium, Neurospora and Monascus genera. Since various species are used for production of human food, their biomass can be considered for feed applications and so biomass compositional characteristics as well as aspects related to culture in bioreactor are also provided. The review has been further complemented with future research avenues.
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Affiliation(s)
- Jorge A Ferreira
- Swedish Centre for Resource Recovery, University of Borås, SE 50190 Borås, Sweden
| | - Amir Mahboubi
- Swedish Centre for Resource Recovery, University of Borås, SE 50190 Borås, Sweden
| | - Patrik R Lennartsson
- Swedish Centre for Resource Recovery, University of Borås, SE 50190 Borås, Sweden
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26
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Ajala EO, Ajala MA, Ogunniyi DS, Sunmonu MO. Kinetics of gluconic acid production and cell growth in a batch bioreactor by Aspergillus niger
using breadfruit hydrolysate. J FOOD PROCESS ENG 2016. [DOI: 10.1111/jfpe.12461] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- E. O. Ajala
- Department of Chemical Engineering; University of Ilorin; Ilorin Kwara State Nigeria
| | - M. A. Ajala
- Department of Chemical Engineering; Ladoke Akintola University of Technology; Ogbomoso Oyo State Nigeria
| | - D. S. Ogunniyi
- Department of Chemical Engineering; University of Ilorin; Ilorin Kwara State Nigeria
| | - M. O. Sunmonu
- Department of Food and Bioprocess Engineering; University of Ilorin; Ilorin Kwara State Nigeria
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27
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Zhang H, Zhang J, Bao J. High titer gluconic acid fermentation by Aspergillus niger from dry dilute acid pretreated corn stover without detoxification. BIORESOURCE TECHNOLOGY 2016; 203:211-9. [PMID: 26724553 DOI: 10.1016/j.biortech.2015.12.042] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 12/13/2015] [Accepted: 12/15/2015] [Indexed: 05/15/2023]
Abstract
This study reported a high titer gluconic acid fermentation using dry dilute acid pretreated corn stover (DDAP) hydrolysate without detoxification. The selected fermenting strain Aspergillus niger SIIM M276 was capable of inhibitor degradation thus no detoxification on pretreated corn stover was required. Parameters of gluconic acid fermentation in corn stover hydrolysate were optimized in flasks and in fermentors to achieve 76.67 g/L gluconic acid with overall yield of 94.91%. The sodium gluconate obtained from corn stover was used as additive for extending setting time of cement mortar and similar function was obtained with starch based sodium gluconate. This study provided the first high titer gluconic acid production from lignocellulosic feedstock with potential of industrial applications.
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Affiliation(s)
- Hongsen Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Jian Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Jie Bao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
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28
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Lu F, Wang Z, Zhao W, Chu J, Zhuang Y. A simple novel approach for real-time monitoring of sodium gluconate production by on-line physiological parameters in batch fermentation by Aspergillus niger. BIORESOURCE TECHNOLOGY 2016; 202:133-141. [PMID: 26706727 DOI: 10.1016/j.biortech.2015.11.077] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Revised: 11/27/2015] [Accepted: 11/28/2015] [Indexed: 06/05/2023]
Abstract
In this paper, approach for real-time monitoring of sodium gluconate (SG) fermentation was established for the first time by the equations which can calculate real-time key-parameters by on-line physiological data. Based on this approach, limiting factors were found out in initial fermentation F1 and then step-wise agitation increase and improved medium recipe were proposed in fermentation F2 and F3, respectively. The highest average SG production rate (16.58±0.91 g L(-1) h(-1)) was achieved in fermentation F3, which was 104.2% and 48.0% higher than those in fermentation F1 and F2, respectively. Meanwhile, due to shorter fermentation period (decreased from 34 h to 18.7 h), lower biomass (about 1.5 g L(-1)) and less by-product accumulation, the overall yield of 0.943±0.012 (mol mol(-1)) in fermentation F3 increased more than 16.0% compared to fermentation F1. This approach had been successfully applied to industrial fermentation and greatly improved SG production.
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Affiliation(s)
- Fei Lu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, P.O. Box 329, 130 Meilong Road, Shanghai 200237, China
| | - Zejian Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, P.O. Box 329, 130 Meilong Road, Shanghai 200237, China
| | - Wei Zhao
- Shan Dong Fuyang Biological Technology Co., Ltd, China
| | - Ju Chu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, P.O. Box 329, 130 Meilong Road, Shanghai 200237, China.
| | - Yingping Zhuang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, P.O. Box 329, 130 Meilong Road, Shanghai 200237, China
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29
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Osunkanmibi OB, Owolabi TO, Betiku E. Comparison of Artificial Neural Network and Response Surface Methodology Performance on Fermentation Parameters Optimization of Bioconversion of Cashew Apple Juice to Gluconic Acid. INTERNATIONAL JOURNAL OF FOOD ENGINEERING 2015. [DOI: 10.1515/ijfe-2015-0072] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The study examined the impact and interactions of cashew apple juice (CAJ) concentration, pH, NaNO3 concentration, inoculum size and time on gluconic acid (GA) production in a central composite design (CCD). The fermentation process and parameters involved were modeled and optimized using artificial neural network (ANN) and response surface methodology (RSM). The ANN model established the optimum levels as CAJ of 250 g/l, pH of 4.21, NaNO3 of 1.51 g/l, inoculum size of 2.87% volume and time of 24.41 h with an actual GA of 249.99 g/l. The optimum levels predicted by RSM model for the five independent variables were CAJ of 249 g/l, pH of 4.6, NaNO3 of 2.29 g/l, inoculum size of 3.95% volume, and time of 38.9 h with an actual GA of 246.34 g/l. The ANN model was superior to the RSM model in predicting GA production. The study demonstrated that CAJ could serve as the sole carbon source for GA production.
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30
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The reuse of wastepaper for the extraction of cellulose nanocrystals. Carbohydr Polym 2015; 118:165-9. [DOI: 10.1016/j.carbpol.2014.10.072] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Revised: 10/12/2014] [Accepted: 10/27/2014] [Indexed: 11/23/2022]
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31
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Ko KC, Lee JH, Han Y, Choi JH, Song JJ. A novel multifunctional cellulolytic enzyme screened from metagenomic resources representing ruminal bacteria. Biochem Biophys Res Commun 2013; 441:567-72. [DOI: 10.1016/j.bbrc.2013.10.120] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 10/22/2013] [Indexed: 11/26/2022]
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32
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Strategy for screening metagenomic resources for exocellulase activity using a robotic, high-throughput screening system. J Microbiol Methods 2013; 94:311-6. [DOI: 10.1016/j.mimet.2013.07.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 07/16/2013] [Accepted: 07/16/2013] [Indexed: 11/17/2022]
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33
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Kositchaiyong A, Rosarpitak V, Sombatsompop N. Antifungal properties and material characteristics of PVC and wood/PVC composites doped with carbamate-based fungicides. POLYM ENG SCI 2013. [DOI: 10.1002/pen.23672] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Apisit Kositchaiyong
- Division of Materials Technology, School of Energy, Environment and Materials; King Mongkut's University of Technology Thonburi (KMUTT), Polymer PROcessing and Flow (P-PROF) Research Group; Thungkru Bangkok 10140 Thailand
| | - Vichai Rosarpitak
- V.P. Wood Co., Ltd.; 25/5 Moo 4, Soi Suksawad 66, Bangmod, Thungkru Bangkok 10140 Thailand
| | - Narongrit Sombatsompop
- Division of Materials Technology, School of Energy, Environment and Materials; King Mongkut's University of Technology Thonburi (KMUTT), Polymer PROcessing and Flow (P-PROF) Research Group; Thungkru Bangkok 10140 Thailand
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34
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Park EY, Naruse K, Kato T. One-pot bioethanol production from cellulose by co-culture of Acremonium cellulolyticus and Saccharomyces cerevisiae. BIOTECHNOLOGY FOR BIOFUELS 2012; 5:64. [PMID: 22938388 PMCID: PMC3493283 DOI: 10.1186/1754-6834-5-64] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Accepted: 08/30/2012] [Indexed: 05/07/2023]
Abstract
BACKGROUND While the ethanol production from biomass by consolidated bioprocess (CBP) is considered to be the most ideal process, simultaneous saccharification and fermentation (SSF) is the most appropriate strategy in practice. In this study, one-pot bioethanol production, including cellulase production, saccharification of cellulose, and ethanol production, was investigated for the conversion of biomass to biofuel by co-culture of two different microorganisms such as a hyper cellulase producer, Acremonium cellulolyticus C-1 and an ethanol producer Saccharomyces cerevisiae. Furthermore, the operational conditions of the one-pot process were evaluated for maximizing ethanol concentration from cellulose in a single reactor. RESULTS Ethanol production from cellulose was carried out in one-pot bioethanol production process. A. cellulolyticus C-1 and S. cerevisiae were co-cultured in a single reactor. Cellulase producing-medium supplemented with 2.5 g/l of yeast extract was used for productions of both cellulase and ethanol. Cellulase production was achieved by A. cellulolyticus C-1 using Solka-Floc (SF) as a cellulase-inducing substrate. Subsequently, ethanol was produced with addition of both 10%(v/v) of S. cerevisiae inoculum and SF at the culture time of 60 h. Dissolved oxygen levels were adjusted at higher than 20% during cellulase producing phase and at lower than 10% during ethanol producing phase. Cellulase activity remained 8-12 FPU/ml throughout the one-pot process. When 50-300 g SF/l was used in 500 ml Erlenmeyer flask scale, the ethanol concentration and yield based on initial SF were as 8.7-46.3 g/l and 0.15-0.18 (g ethanol/g SF), respectively. In 3-l fermentor with 50-300 g SF/l, the ethanol concentration and yield were 9.5-35.1 g/l with their yields of 0.12-0.19 (g/g) respectively, demonstrating that the one-pot bioethanol production is a reproducible process in a scale-up bioconversion of cellulose to ethanol. CONCLUSION A. cellulolyticus cells produce cellulase using SF. Subsequently, the produced cellulase saccharifies the SF, and then liberated reducing sugars are converted to ethanol by S. cerevisiae. These reactions were carried out in the one-pot process with two different microorganisms in a single reactor, which does require neither an addition of extraneous cellulase nor any pretreatment of cellulose. Collectively, the one-pot bioethanol production process with two different microorganisms could be an alternative strategy for a practical bioethanol production using biomass.
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Affiliation(s)
- Enoch Y Park
- Laboratory of Biotechnology, Integrated Bioscience Section, Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka, 422-8017, Japan
- Laboratory of Biotechnology, Faculty of Agriculture, Department of Applied Biological Chemistry, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka, 422-8017, Japan
| | - Kazuya Naruse
- Laboratory of Biotechnology, Faculty of Agriculture, Department of Applied Biological Chemistry, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka, 422-8017, Japan
| | - Tatsuya Kato
- Laboratory of Biotechnology, Faculty of Agriculture, Department of Applied Biological Chemistry, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka, 422-8017, Japan
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35
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Gitchaiwat A, Kositchaiyong A, Sombatsompop K, Prapagdee B, Isarangkura K, Sombatsompop N. Assessment and characterization of antifungal and antialgal performances for biocide-enhanced linear low-density polyethylene. J Appl Polym Sci 2012. [DOI: 10.1002/app.37675] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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36
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Chen H, Venditti RA, Jameel H, Park S. Enzymatic hydrolysis of recovered office printing paper with low enzyme dosages to produce fermentable sugars. Appl Biochem Biotechnol 2012; 166:1121-36. [PMID: 22286832 DOI: 10.1007/s12010-011-9498-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Accepted: 12/11/2011] [Indexed: 10/14/2022]
Affiliation(s)
- Hui Chen
- Department of Forest Biomaterials, North Carolina State University, Raleigh, NC 27695-8005, USA
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37
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Dubey AK, Gupta P, Garg N, Naithani S. Bioethanol production from waste paper acid pretreated hydrolyzate with xylose fermenting Pichia stipitis. Carbohydr Polym 2012. [DOI: 10.1016/j.carbpol.2012.01.004] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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38
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Wang X, Song A, Li L, Li X, Zhang R, Bao J. Effect of calcium carbonate in waste office paper on enzymatic hydrolysis efficiency and enhancement procedures. KOREAN J CHEM ENG 2010. [DOI: 10.1007/s11814-010-0365-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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39
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A novel bifunctional endo-/exo-type cellulase from an anaerobic ruminal bacterium. Appl Microbiol Biotechnol 2010; 89:1453-62. [PMID: 21046376 DOI: 10.1007/s00253-010-2949-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2010] [Revised: 10/03/2010] [Accepted: 10/08/2010] [Indexed: 11/27/2022]
Abstract
An anaerobic microorganism termed AN-C16-KBRB was isolated from the bovine rumen and demonstrated cellulolytic activity on a NB agar plate containing azo-carboxymethyl cellulose. The 16S rRNA gene of the strain was 98% similar to that of Clostridiaceae bacterium SK082 (AB298754) as the highest homology. A novel celEdx16 gene encoding a bifunctional endo-/exocellulase (CelEdx16) was cloned by the shotgun method from AN-C16-KBRB, and the enzyme was characterized. The celEdx16 gene had an open reading frame of 1,104-base pairs, which encoded 367 amino acids to yield a protein of molecular mass 40.4 kDa. The amino acid sequence was 53% identical to that of an endoglucanase from Clostridium thermocellum. CelEdx16 was overexpressed in Escherichia coli and purified using Ni-NTA affinity chromatography. The specific endocellulase and exocellulase activities of CelEdx16 were 15.9 and 3.6 x 10⁻² U mg⁻¹, respectively. The Michaelis-Menten constant (K (m) values) and the maximal reaction velocities (V(max) values) of CelEdx16 were 47.1 μM and 9.6 x 10⁻³ μmole min⁻¹ when endocellulase activity was measured and 106.3 μM and 2.1 x 10⁻⁵ μmol min⁻¹ when exocellulase activity was assessed. CelEdx16 was optimally active at pH 5.0 and 40 °C.
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Tang B, Pan H, Zhang Q, Ding L. Cloning and expression of cellulase gene EG1 from Rhizopus stolonifer var. reflexus TP-02 in Escherichia coli. BIORESOURCE TECHNOLOGY 2009; 100:6129-6132. [PMID: 19640700 DOI: 10.1016/j.biortech.2009.06.091] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2009] [Revised: 06/08/2009] [Accepted: 06/09/2009] [Indexed: 05/28/2023]
Abstract
A novel gene, EG encoding enzymes involved in carboxymethyl cellulose (CMC) degradation was isolated, sequenced from the filamentous fungus Rhizopus stolonifer var. reflexus TP-02, and expressed in Escherichia coli BL21. The results showed that the gene amplified from the cDNA of the strain could be classified as the family of endoglucanase. During the fermentation process, the maximum endoglucanase activity (i.e. 0.715 IU/ml) of the recombinant bacteria was obtained at 36 h. The SDS-PAGE analysis on purified samples showed that a band with apparent molecular weight of about 40 kDa was detected after staining with Coomassie brilliant blue.
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Affiliation(s)
- Bin Tang
- Department of Biochemical Engineering, Anhui University of Technology and Science, Wuhu 241000, China.
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Prasetyo J, Sumita S, Okuda N, Park EY. Response of cellulase activity in pH-controlled cultures of the filamentous fungus Acremonium cellulolyticus. Appl Biochem Biotechnol 2009; 162:52-61. [PMID: 19882113 PMCID: PMC2848724 DOI: 10.1007/s12010-009-8826-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2009] [Accepted: 10/14/2009] [Indexed: 11/02/2022]
Abstract
Cellulase production was investigated in pH-controlled cultures of Acremonium cellulolyticus. The response to culture pH was investigated for three cellulolytic enzymes, carbomethyl cellulase (CMCase), avicelase, and beta-glucosidase. Avicelase and beta-glucosidase showed similar profiles, with maximum activity in cultures at pH 5.5-6. The CMCase activity was highest in a pH 4 culture. At an acidic pH, the ratios of CMCase and avicelase activity to cellulase activity defined by filter paper unit were high, but at a neutral pH, the beta-glucosidase ratio was high. The pH 6.0 culture showed the highest cellulase activity within the range of pH 3.5-6.5 cultures. The saccharification activity from A. cellulolyticus was compared to those of the cellulolytic enzymes from other species. The A. cellulolyticus culture broth had a saccharification yield comparable to those of the Trichoderma enzymes GC220 and Cellulosin T2, under conditions with the same cellulase activity. The saccharification yields from Solka floc, Avicel, and waste paper, measured as the percent of released reducing sugar to dried substrate, were greater than 80% after 96 h of reaction. The yields were 16% from carboxymethylcellulose and 26% from wood chip refiner. Thus, the A. cellulolyticus enzymes were suitable for converting cellulolytic biomass to reducing sugars for biomass ethanol production. This study is a step toward the establishment of an efficient system to reutilize cellulolytic biomass.
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Affiliation(s)
- Joni Prasetyo
- Laboratory of Biotechnology, Integrated Bioscience Section, Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Shizuoka 422-8529, Japan
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Feng Y, Jiang JX, Zhu LW. Recent developments in activities, utilization and sources of cellulase. ACTA ACUST UNITED AC 2009. [DOI: 10.1007/s11632-009-0028-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Jun H, Bing Y, Keying Z, Xuemei D, Daiwen C. Strain improvement of Trichoderma reesei Rut C-30 for increased cellulase production. Indian J Microbiol 2009; 49:188-95. [PMID: 23100767 PMCID: PMC3450144 DOI: 10.1007/s12088-009-0030-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2008] [Accepted: 05/08/2009] [Indexed: 10/20/2022] Open
Abstract
The strain of Trichoderma reesei Rut C-30 was subjected to mutation after treatment with N-methyl-N'-nitro-N-nitrosoguanidine (NG) for 6 h followed by UV irradiation for 15 min. Successive mutants showed enhanced cellulase production, clear hydrolysis zone and rapid growth on Avicel-containing plate. Particularly, the mutant NU-6 showed approximately two-fold increases in activity of both FPA and CMCase in shake flask culture when grown on basal medium containing peptone (1%) and wheat bran (1%). The enzyme production was further optimized using eight different media. When a mixture of lactose and yeast cream was used as cellulase inducer, the mutant NU-6 yielded the highest enzyme and cell production with a FPase activity of 6.2 U ml(-1), a CMCase activity of 54.2 U ml(-1), a β-glucosidase activity of 0.39 U ml(-1), and a fungal biomass of 12.6 mg ml(-1). It deserved noting that the mutant NU-6 also secreted large amounts of xylanases (291.3 U ml(-1)). These results suggested that NU-6 should be an attractive producer for both cellulose and xylanase production.
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Affiliation(s)
- He Jun
- Institute of Animal Nutrition, Sichuan Agricultural University, Yaan, Sichuan, 625 014 P. R. China
- Key Laboratory of Animal Disease-Resistance Nutrition, Ministry of Education, Yaan, Sichuan, China
| | - Yu Bing
- Institute of Animal Nutrition, Sichuan Agricultural University, Yaan, Sichuan, 625 014 P. R. China
- Key Laboratory of Animal Disease-Resistance Nutrition, Ministry of Education, Yaan, Sichuan, China
| | - Zhang Keying
- Institute of Animal Nutrition, Sichuan Agricultural University, Yaan, Sichuan, 625 014 P. R. China
- Key Laboratory of Animal Disease-Resistance Nutrition, Ministry of Education, Yaan, Sichuan, China
| | - Ding Xuemei
- Institute of Animal Nutrition, Sichuan Agricultural University, Yaan, Sichuan, 625 014 P. R. China
- Key Laboratory of Animal Disease-Resistance Nutrition, Ministry of Education, Yaan, Sichuan, China
| | - Chen Daiwen
- Institute of Animal Nutrition, Sichuan Agricultural University, Yaan, Sichuan, 625 014 P. R. China
- Key Laboratory of Animal Disease-Resistance Nutrition, Ministry of Education, Yaan, Sichuan, China
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Chi Z, Chi Z, Zhang T, Liu G, Li J, Wang X. Production, characterization and gene cloning of the extracellular enzymes from the marine-derived yeasts and their potential applications. Biotechnol Adv 2009; 27:236-55. [DOI: 10.1016/j.biotechadv.2009.01.002] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2008] [Revised: 12/28/2008] [Accepted: 01/08/2009] [Indexed: 10/21/2022]
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Bioproducts from Aureobasidium pullulans, a biotechnologically important yeast. Appl Microbiol Biotechnol 2009; 82:793-804. [PMID: 19198830 DOI: 10.1007/s00253-009-1882-2] [Citation(s) in RCA: 141] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2008] [Revised: 01/18/2009] [Accepted: 01/19/2009] [Indexed: 10/21/2022]
Abstract
It has been well documented that Aureobasidium pullulans is widely distributed in different environments. Different strains of A. pullulans can produce amylase, proteinase, lipase, cellulase, xylanase, mannanase, transferases, pullulan, siderophore, and single-cell protein, and the genes encoding proteinase, lipase, cellulase, xylanase, and siderophore have been cloned and characterized. Therefore, like Aspergillus spp., it is a biotechnologically important yeast that can be used in different fields. So it is very important to sequence the whole genomic DNA of the yeast cells in order to find new more bioproducts and novel genes from this yeast.
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Zhou J, Wang YH, Chu J, Zhuang YP, Zhang SL, Yin P. Identification and purification of the main components of cellulases from a mutant strain of Trichoderma viride T 100-14. BIORESOURCE TECHNOLOGY 2008; 99:6826-33. [PMID: 18331790 DOI: 10.1016/j.biortech.2008.01.077] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2007] [Revised: 01/23/2008] [Accepted: 01/26/2008] [Indexed: 05/22/2023]
Abstract
A new mutant strain of fungus Trichoderma viride T 100-14 was cultivated on 1% microcrystalline cellulose (Avicel) for 120h and the resulting culture filtrate was prepared for protein identification and purification. To identify the predominant catalytic components, cellulases were separated by an adapted two-dimensional electrophoresis technique. The apparent major spots were identified by high performance liquid chromatography electrospray ionization mass (HPLC-ESI-MS). Seven of the components were previously known, i.e., the endoglucanases Cel7B (EG I), Cel12A (EG III), Cel61A (EG IV), the cellobiohydrolases Cel7A (CBH I), Cel6A (CBH II), Cel6B (CBH IIb) and the beta-glucosidase. The seven major components in the fermentation broth of T. viride T 100-14 probably constitute the essential enzymes for crystalline cellulose hydrolysis and they were further purified to electrophoretic homogeneity by a series of chromatography column. Hydrolysis studies of the purified elements revealed that three of the cellulases were classified as cellobiohydrolases due to their main activities on p-nitrophenyl-beta-d-cellobioside (pNPC). Three of the cellulases, with the abilities of hydrolyzing both carboxymethyl-cellulose (CMC) and Avicel indicate their endoglucanase activities. It deserved noting that the beta-glucosidase from the T 100-14 displayed an extremely high activity on p-nitrophenyl-beta-D-glycopyranoside (pNPG), which suggested it was a good candidate for the conversion of cellobiose to glucose.
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Affiliation(s)
- Jin Zhou
- State Key Laboratory of Bioreactor Engineering, National Research Center for Biotechnology (Shanghai), East China University of Science and Technology, Shanghai 200237, PR China
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Lee YJ, Kim BK, Lee BH, Jo KI, Lee NK, Chung CH, Lee YC, Lee JW. Purification and characterization of cellulase produced by Bacillus amyoliquefaciens DL-3 utilizing rice hull. BIORESOURCE TECHNOLOGY 2008; 99:378-86. [PMID: 17320379 DOI: 10.1016/j.biortech.2006.12.013] [Citation(s) in RCA: 162] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2006] [Revised: 12/06/2006] [Accepted: 12/06/2006] [Indexed: 05/14/2023]
Abstract
A microorganism hydrolyzing rice hull was isolated from soil and identified as Bacillus amyloliquefaciens by analysis of 16S rDNA and partial sequences of the gyrA gene, and named as B. amyloliquefaciens DL-3. With the analysis of SDS-PAGE, the molecular weight of the purified cellulase was estimated to be 54kDa. The purified cellulase hydrolyzed avicel, caboxymethylcellulose (CMC), cellobiose, beta-glucan and xylan, but not p-Nitrophenyl-beta-D-glucopyranoside (PNPG). Optimum temperature and pH for the CMCase activity of the purified cellulase were found to be 50 degrees C and pH 7.0, respectively. The CMCase activity was inhibited by some metal ions, N-bromosuccinimide and EDTA in the order of Hg(2+)>EDTA>Mn(2+)>N-bromosuccinimide>Ni(2+)>Pb(2+)>Sr(2+)>Co(2+)>K(+). The open reading frame of the cellulase from B. amyloliquefaciens DL-3 was found to encode a protein of 499 amino acids. The deduced amino acid sequence of the cellulase from B. amyloliquefaciens DL-3 showed high identity to cellulases from other Bacillus species, a modular structure containing a catalytic domain of the glycoside hydrolase family 5 (GH5), and a cellulose-binding module type 3 (CBM3).
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Affiliation(s)
- You-Jung Lee
- Department of Biotechnology, College of Natural Resources and Life Science, Dong-A University, Hadan-2 Dong 840, Saha-Gu, Busan, Republic of Korea
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Immobilized glucose oxidase as a catalyst to the conversion of glucose into gluconic acid using a membrane reactor. Enzyme Microb Technol 2007. [DOI: 10.1016/j.enzmictec.2006.07.039] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Singh OV, Kumar R. Biotechnological production of gluconic acid: future implications. Appl Microbiol Biotechnol 2007; 75:713-22. [PMID: 17525864 DOI: 10.1007/s00253-007-0851-x] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2006] [Revised: 01/16/2007] [Accepted: 01/21/2007] [Indexed: 10/23/2022]
Abstract
Gluconic acid (GA) is a multifunctional carbonic acid regarded as a bulk chemical in the food, feed, beverage, textile, pharmaceutical, and construction industries. The favored production process is submerged fermentation by Aspergillus niger utilizing glucose as a major carbohydrate source, which accompanied product yield of 98%. However, use of GA and its derivatives is currently restricted because of high prices: about US$ 1.20-8.50/kg. Advancements in biotechnology such as screening of microorganisms, immobilization techniques, and modifications in fermentation process for continuous fermentation, including genetic engineering programmes, could lead to cost-effective production of GA. Among alternative carbohydrate sources, sugarcane molasses, grape must show highest GA yield of 95.8%, and banana must may assist reducing the overall cost of GA production. These methodologies would open new markets and increase applications of GA.
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Affiliation(s)
- Om V Singh
- Department of Pediatrics, The Johns Hopkins School of Medicine, 600 N. Wolfe St., CMSC, 3-106, Baltimore, MD 21287, USA.
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