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Ibenegbu CC, Leak DJ. Simultaneous saccharification and ethanologenic fermentation (SSF) of waste bread by an amylolytic Parageobacillus thermoglucosidasius strain TM333. Microb Cell Fact 2022; 21:251. [PMID: 36443865 PMCID: PMC9702664 DOI: 10.1186/s12934-022-01971-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 11/14/2022] [Indexed: 11/29/2022] Open
Abstract
The starch in waste bread (WB) from industrial sandwich production was directly converted to ethanol by an amylolytic, ethanologenic thermophile (Parageobacillus thermoglucosidasius strain TM333) under 5 different simultaneous saccharification and fermentation (SSF) regimes. Crude α-amylase from TM333 was used alone or in the presence of amyloglucosidase (AMG), a starch monomerizing enzyme used in industry, with/without prior gelatinisation/liquefaction treatments and P. thermoglucosidasius TM333 fermentation compared with Saccharomyces cerevisiae as a control. Results suggest that TM333 can ferment WB using SSF with yields of 94-100% of theoretical (based on all sugars in WB) in 48 h without the need for AMG addition or any form of heat pre-treatment. This indicates that TM333 can transport and ferment all of the malto-oligosaccharides generated by its α-amylase. In the yeast control experiments, addition of AMG together with the crude α-amylase was necessary for full fermentation over the same time period. This suggests that industrial fermentation of WB starch to bio-ethanol or other products using an enhanced amylolytic P. thermoglucosidasius strain could offer significant cost savings compared to alternatives requiring enzyme supplementation.
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Affiliation(s)
| | - David J. Leak
- grid.7340.00000 0001 2162 1699Department of Biology & Biochemistry, University of Bath, Bath, BA2 7AY UK ,Chipsboard UK Ltd, Unit 5 Matrix Court, Middleton Grove, Leeds, LS11 5WB UK
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Sena RO, Carneiro C, Moura MVH, Brêda GC, Pinto MCC, Fé LXSGM, Fernandez-Lafuente R, Manoel EA, Almeida RV, Freire DMG, Cipolatti EP. Application of Rhizomucor miehei lipase-displaying Pichia pastoris whole cell for biodiesel production using agro-industrial residuals as substrate. Int J Biol Macromol 2021; 189:734-743. [PMID: 34455007 DOI: 10.1016/j.ijbiomac.2021.08.173] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 08/13/2021] [Accepted: 08/20/2021] [Indexed: 11/19/2022]
Abstract
This work aimed the application of a new biocatalyst for biodiesel production from residual agro-industrial fatty acids. A recombinant Pichia pastoris displaying lipase from Rhizomucor miehei (RML) on the cell surface, using the PIR-1 anchor system, were prepared using glycerol as the carbon source. The biocatalyst, named RML-PIR1 showed optimum temperature of 45 °C (74.0 U/L). The stability tests resulted in t1/2 of 3.49 and 2.15 h at 40 and 45 °C, respectively. RML-PIR1 was applied in esterification reactions using industrial co-products as substrates, palm fatty acid distillate (PFAD) and soybean fatty acid distillate (SFAD). The highest productivity was observed for SFAD after 48 h presenting 79.1% of conversion using only 10% of biocatalyst and free-solvent system. This is about ca. eight times higher than commercial free RML in the same conditions. The stabilizing agents study revealed that the treatment using glutaraldehyde (GA) and poly(ethylene glycol) (PEG) enabled increased stability and reuse of biocatalyst. It was observed by SEM analysis that the treatment modified the cell morphology. RML-PIR1-GA presented 87.9% of the initial activity after 6 reuses, whilst the activity of unmodified RML-PIR decreased by 40% after the first use. These results were superior to those obtained in the literature, making this new biocatalyst promising for biotechnological applications, such as the production of biofuels on a large scale.
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Affiliation(s)
- Raphael Oliveira Sena
- Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, 21941-909 Rio de Janeiro, Brazil
| | - Candida Carneiro
- Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, 21941-909 Rio de Janeiro, Brazil
| | - Marcelo Victor Holanda Moura
- Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, 21941-909 Rio de Janeiro, Brazil; SENAI Innovation Institute for Biosynthetics and Fibers, SENAI CETIQT, Rio de Janeiro, Brazil
| | - Gabriela Coelho Brêda
- Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, 21941-909 Rio de Janeiro, Brazil
| | - Martina C C Pinto
- Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, 21941-909 Rio de Janeiro, Brazil; Chemical Engineering Program, COPPE, Federal University of Rio de Janeiro, 68502, Rio de Janeiro, RJ 21941-972, Brazil
| | | | - Roberto Fernandez-Lafuente
- Department of Biocatalysis, ICP-CSIC, Campus UAM-CSIC, Cantoblanco, 28049 Madrid, Spain; Center of Excellence in Bionanoscience Research, External Scientific Advisory Academic, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Evelin Andrade Manoel
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Federal University of Rio de Janeiro, 21941-170 Rio de Janeiro, Brazil
| | - Rodrigo Volcan Almeida
- Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, 21941-909 Rio de Janeiro, Brazil.
| | - Denise Maria Guimarães Freire
- Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, 21941-909 Rio de Janeiro, Brazil.
| | - Eliane Pereira Cipolatti
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Federal University of Rio de Janeiro, 21941-170 Rio de Janeiro, Brazil; Department of Biochemical Process Technology, Rio de Janeiro State University, São Francisco Xavier, 524 Maracanã, Rio de Janeiro, Brazil.
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Alsammar H, Delneri D. An update on the diversity, ecology and biogeography of the Saccharomyces genus. FEMS Yeast Res 2021; 20:5810663. [PMID: 32196094 PMCID: PMC7150579 DOI: 10.1093/femsyr/foaa013] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 03/19/2020] [Indexed: 12/14/2022] Open
Abstract
Saccharomyces cerevisiae is the most extensively studied yeast and, over the last century, provided insights on the physiology, genetics, cellular biology and molecular mechanisms of eukaryotes. More recently, the increase in the discovery of wild strains, species and hybrids of the genus Saccharomyces has shifted the attention towards studies on genome evolution, ecology and biogeography, with the yeast becoming a model system for population genomic studies. The genus currently comprises eight species, some of clear industrial importance, while others are confined to natural environments, such as wild forests devoid from human domestication activities. To date, numerous studies showed that some Saccharomyces species form genetically diverged populations that are structured by geography, ecology or domestication activity and that the yeast species can also hybridize readily both in natural and domesticated environments. Much emphasis is now placed on the evolutionary process that drives phenotypic diversity between species, hybrids and populations to allow adaptation to different niches. Here, we provide an update of the biodiversity, ecology and population structure of the Saccharomyces species, and recapitulate the current knowledge on the natural history of Saccharomyces genus.
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Affiliation(s)
- Haya Alsammar
- Department of Biological Sciences, Faculty of Science, Kuwait University, P. O. Box 5969, Safat 13060, Kuwait
| | - Daniela Delneri
- Manchester Institute of Biotechnology, Faculty of Biology Medicine and Health, The University of Manchester, Manchester, M1 7DN, UK
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Production and Characterization of Whole-Cell Rhizopus oryzae CCT3759 to be Applied as Biocatalyst in Vegetable Oils Hydrolysis. Catal Letters 2021. [DOI: 10.1007/s10562-021-03622-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Utilization of over-ripened fruit (waste fruit) for the eco-friendly production of ethanol. ACTA ACUST UNITED AC 2021; 34:270-276. [PMID: 33564216 PMCID: PMC7862972 DOI: 10.1007/s42535-020-00185-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 08/04/2020] [Accepted: 08/07/2020] [Indexed: 11/18/2022]
Abstract
This research was carried out to produce ethanol for use as a sanitizer in today’s COVID-19 pandemic situation, via cost-effective and eco-friendly techniques. The waste of seasonal fruit, i.e. apple, grape and Indian blueberry, was used in the study. Saccharomyces cerevisiae (baker’s yeast) was used with KMnO4 (5%), sucrose (47 g) and urea (1.5 g) for the fermentation process. All the selected overripe fruits were analyzed for variations in parameters including specific gravity, pH, temperature and concentration during complete fermentation for ethanol production. After complete fermentation, it was clear that the use of Indian blueberry at a temperature of 33 °C, specific gravity of 0.875 and pH value of 5.2 yielded the highest ethanol concentration of 6.5%. The concentration of ethanol obtained from grape samples was 5.23% at 30 °C with specific gravity of 0.839 and pH 4.3. Lastly, the ethanol concentration obtained from apple waste was about 4.52% at 32 °C with specific gravity of 0.880 and pH of 4.7 pH. The FTIR curve of each sample shows an absorbance peak in a wave number range of 3000 cm−1 to 3500 cm−1, which indicates the absence of alcohol in the samples after fermentation.
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Carrillo-Nieves D, Saldarriaga-Hernandez S, Gutiérrez-Soto G, Rostro-Alanis M, Hernández-Luna C, Alvarez AJ, Iqbal HMN, Parra-Saldívar R. Biotransformation of agro-industrial waste to produce lignocellulolytic enzymes and bioethanol with a zero waste. BIOMASS CONVERSION AND BIOREFINERY 2020. [DOI: 10.1007/s13399-020-00738-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Next generation industrial biotechnology based on extremophilic bacteria. Curr Opin Biotechnol 2018; 50:94-100. [DOI: 10.1016/j.copbio.2017.11.016] [Citation(s) in RCA: 186] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 11/24/2017] [Accepted: 11/27/2017] [Indexed: 01/13/2023]
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Codato CB, Martini C, Ceccato-Antonini SR, Bastos RG. Ethanol production from Dekkera bruxellensis in synthetic media with pentose. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2018. [DOI: 10.1590/0104-6632.20180351s20160475] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Struszczyk-Świta K, Stańczyk Ł, Szczęsna-Antczak M, Antczak T. Scale-up of PUF-immobilized fungal chitosanase-lipase preparation production. Prep Biochem Biotechnol 2017; 47:909-917. [PMID: 28816606 DOI: 10.1080/10826068.2017.1365240] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Mucor circinelloides IBT-83 mycelium that exhibits both lipolytic (AL) and chitosanolytic (ACH) activities was immobilized into polyurethane foam in a 30 L laboratory fermenter. The process of immobilization was investigated in terms of the carrier porosity, its type, amount, and shape, location inside the fermenter, mixing, and aeration parameters during the culture, as well as downstream processing operations. The selected conditions allowed for immobilization of approximately 7 g of defatted and dried mycelium in 1 g of carrier, i.e., seven times more than achievable in 1 L shake-flasks. Enzymatic preparation obtained by this method exhibited both the chitosanolytic (ACH 432.5 ± 6.8 unit/g) and lipolytic (AL 150.0 ± 9.3 U/g) activities. The immobilized preparation was successfully used in chitosan hydrolysis to produce chitooligosaccharides and low molecular weight chitosan, as well as in waste fats degradation and in esters synthesis in nonaqueous media. It was found that the half-life of immobilized preparations stored at room temperature is on average of 200 days.
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Affiliation(s)
- Katarzyna Struszczyk-Świta
- a Faculty of Biotechnology and Food Sciences, Institute of Technical Biochemistry , Lodz University of Technology , Lodz , Poland
| | - Łukasz Stańczyk
- a Faculty of Biotechnology and Food Sciences, Institute of Technical Biochemistry , Lodz University of Technology , Lodz , Poland
| | - Mirosława Szczęsna-Antczak
- a Faculty of Biotechnology and Food Sciences, Institute of Technical Biochemistry , Lodz University of Technology , Lodz , Poland
| | - Tadeusz Antczak
- a Faculty of Biotechnology and Food Sciences, Institute of Technical Biochemistry , Lodz University of Technology , Lodz , Poland
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Jahnke JP, Benyamin MS, Sumner JJ, Mackie DM. Using Reverse Osmosis Membranes to Couple Direct Ethanol Fuel Cells with Ongoing Fermentations. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b02915] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Justin P. Jahnke
- U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20740, United States
| | - Marcus S. Benyamin
- U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20740, United States
| | - James J. Sumner
- U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20740, United States
| | - David M. Mackie
- U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20740, United States
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13
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Jahnke JP, Hoyt T, LeFors HM, Sumner JJ, Mackie DM. Aspergillus oryzae-Saccharomyces cerevisiae Consortium Allows Bio-Hybrid Fuel Cell to Run on Complex Carbohydrates. Microorganisms 2016; 4:microorganisms4010010. [PMID: 27681904 PMCID: PMC5029515 DOI: 10.3390/microorganisms4010010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 01/19/2016] [Accepted: 01/26/2016] [Indexed: 11/16/2022] Open
Abstract
Consortia of Aspergillus oryzae and Saccharomyces cerevisiae are examined for their abilities to turn complex carbohydrates into ethanol. To understand the interactions between microorganisms in consortia, Fourier-transform infrared spectroscopy is used to follow the concentrations of various metabolites such as sugars (e.g., glucose, maltose), longer chain carbohydrates, and ethanol to optimize consortia conditions for the production of ethanol. It is shown that with proper design A. oryzae can digest food waste simulants into soluble sugars that S. cerevisiae can ferment into ethanol. Depending on the substrate and conditions used, concentrations of 13% ethanol were achieved in 10 days. It is further shown that a direct alcohol fuel cell (FC) can be coupled with these A. oryzae-enabled S. cerevisiae fermentations using a reverse osmosis membrane. This “bio-hybrid FC” continually extracted ethanol from an ongoing consortium, enhancing ethanol production and allowing the bio-hybrid FC to run for at least one week. Obtained bio-hybrid FC currents were comparable to those from pure ethanol—water mixtures, using the same FC. The A. oryzae–S. cerevisiae consortium, coupled to a bio-hybrid FC, converted food waste simulants into electricity without any pre- or post-processing.
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Affiliation(s)
- Justin P Jahnke
- Army Research Laboratory, 2800 Powder Mill Road, Adelphi, MD 20740, USA.
| | - Thomas Hoyt
- Army Research Laboratory, 2800 Powder Mill Road, Adelphi, MD 20740, USA.
| | - Hannah M LeFors
- Army Research Laboratory, 2800 Powder Mill Road, Adelphi, MD 20740, USA.
| | - James J Sumner
- Army Research Laboratory, 2800 Powder Mill Road, Adelphi, MD 20740, USA.
| | - David M Mackie
- Army Research Laboratory, 2800 Powder Mill Road, Adelphi, MD 20740, USA.
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15
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Odjadjare EC, Mutanda T, Olaniran AO. Potential biotechnological application of microalgae: a critical review. Crit Rev Biotechnol 2015; 37:37-52. [DOI: 10.3109/07388551.2015.1108956] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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16
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Dong SJ, Yi CF, Li H. Changes of Saccharomyces cerevisiae cell membrane components and promotion to ethanol tolerance during the bioethanol fermentation. Int J Biochem Cell Biol 2015; 69:196-203. [PMID: 26515124 DOI: 10.1016/j.biocel.2015.10.025] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 09/28/2015] [Accepted: 10/23/2015] [Indexed: 10/22/2022]
Abstract
During bioethanol fermentation process, Saccharomyces cerevisiae cell membrane might provide main protection to tolerate accumulated ethanol, and S. cerevisiae cells might also remodel their membrane compositions or structure to try to adapt to or tolerate the ethanol stress. However, the exact changes and roles of S. cerevisiae cell membrane components during bioethanol fermentation still remains poorly understood. This study was performed to clarify changes and roles of S. cerevisiae cell membrane components during bioethanol fermentation. Both cell diameter and membrane integrity decreased as fermentation time lasting. Moreover, compared with cells at lag phase, cells at exponential and stationary phases had higher contents of ergosterol and oleic acid (C18:1) but lower levels of hexadecanoic (C16:0) and palmitelaidic (C16:1) acids. Contents of most detected phospholipids presented an increase tendency during fermentation process. Increased contents of oleic acid and phospholipids containing unsaturated fatty acids might indicate enhanced cell membrane fluidity. Compared with cells at lag phase, cells at exponential and stationary phases had higher expressions of ACC1 and HFA1. However, OLE1 expression underwent an evident increase at exponential phase but a decrease at following stationary phase. These results indicated that during bioethanol fermentation process, yeast cells remodeled membrane and more changeable cell membrane contributed to acquiring higher ethanol tolerance of S. cerevisiae cells. These results highlighted our knowledge about relationship between the variation of cell membrane structure and compositions and ethanol tolerance, and would contribute to a better understanding of bioethanol fermentation process and construction of industrial ethanologenic strains with higher ethanol tolerance.
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Affiliation(s)
- Shi-Jun Dong
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, People's Republic of China
| | - Chen-Feng Yi
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, People's Republic of China
| | - Hao Li
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, People's Republic of China.
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Ramani G, Meera B, Rajendhran J, Gunasekaran P. Transglycosylating glycoside hydrolase family 1 β-glucosidase from Penicillium funiculosum NCL1: Heterologous expression in Escherichia coli and characterization. Biochem Eng J 2015. [DOI: 10.1016/j.bej.2015.03.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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18
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Cui FX, Zhang RM, Liu HQ, Wang YF, Li H. Metabolic responses to Lactobacillus plantarum contamination or bacteriophage treatment in Saccharomyces cerevisiae using a GC–MS-based metabolomics approach. World J Microbiol Biotechnol 2015; 31:2003-13. [DOI: 10.1007/s11274-015-1949-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 09/15/2015] [Indexed: 12/01/2022]
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Immobilization of acetyl xylan esterase on modified graphite oxide and utilization to peracetic acid production. BIOTECHNOL BIOPROC E 2015. [DOI: 10.1007/s12257-014-0298-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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20
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Efficient co-displaying and artificial ratio control of α-amylase and glucoamylase on the yeast cell surface by using combinations of different anchoring domains. Appl Microbiol Biotechnol 2014; 99:1655-63. [PMID: 25432675 DOI: 10.1007/s00253-014-6250-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 11/16/2014] [Accepted: 11/18/2014] [Indexed: 10/24/2022]
Abstract
Recombinant yeast strains that display heterologous amylolytic enzymes on their cell surface via the glycosylphosphatidylinositol (GPI)-anchoring system are considered as promising biocatalysts for direct ethanol production from starchy materials. For the effective hydrolysis of these materials, the ratio optimization of multienzyme activity displayed on the cell surface is important. In this study, we have presented a ratio control system of multienzymes displayed on the yeast cell surface by using different GPI-anchoring domains. The novel gene cassettes for the cell-surface display of Streptococcus bovis α-amylase and Rhizopus oryzae glucoamylase were constructed using the Saccharomyces cerevisiae SED1 promoter and two different GPI-anchoring regions derived from Saccharomyces cerevisiae SED1 or SAG1. These gene cassettes were integrated into the Saccharomyces cerevisiae genome in different combinations. Then, the cell-surface α-amylase and glucoamylase activities and ethanol productivity of these recombinant strains were evaluated. The combinations of the gene cassettes of these enzymes affected the ratio of cell-surface α-amylase and glucoamylase activities and ethanol productivity of the recombinant strains. The highest ethanol productivity from raw starch was achieved by the strain harboring one α-amylase gene cassette carrying the SED1-anchoring region and two glucoamylase gene cassettes carrying the SED1-anchoring region (BY-AASS/GASS/GASS). This strain yielded 22.5 ± 0.6 g/L of ethanol from 100 g/L of raw starch in 120 h of fermentation.
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Kim SB, Park C, Kim SW. Process design and evaluation of production of bioethanol and β-lactam antibiotic from lignocellulosic biomass. BIORESOURCE TECHNOLOGY 2014; 172:194-200. [PMID: 25262428 DOI: 10.1016/j.biortech.2014.09.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 09/03/2014] [Accepted: 09/05/2014] [Indexed: 06/03/2023]
Abstract
To design biorefinery processes producing bioethanol from lignocellulosic biomass with dilute acid pretreatment, biorefinery processes were simulated using the SuperPro Designer program. To improve the efficiency of biomass use and the economics of biorefinery, additional pretreatment processes were designed and evaluated, in which a combined process of dilute acid and aqueous ammonia pretreatments, and a process of waste media containing xylose were used, for the production of 7-aminocephalosporanic acid. Finally, the productivity and economics of the designed processes were compared.
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Affiliation(s)
- Sung Bong Kim
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul 136-701, Republic of Korea.
| | - Chulhwan Park
- Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-Ro, Nowon-Gu, Seoul 139-701, Republic of Korea.
| | - Seung Wook Kim
- Department of Chemical and Biological Engineering, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul 136-701, Republic of Korea.
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22
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Andrade GSS, Carvalho AKF, Romero CM, Oliveira PC, de Castro HF. Mucor circinelloides whole-cells as a biocatalyst for the production of ethyl esters based on babassu oil. Bioprocess Biosyst Eng 2014; 37:2539-48. [PMID: 24958521 DOI: 10.1007/s00449-014-1231-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Accepted: 05/28/2014] [Indexed: 11/24/2022]
Abstract
The intracellular lipase production by Mucor circinelloides URM 4182 was investigated through a step-by-step strategy to attain immobilized whole-cells with high lipase activity. Physicochemical parameters, such as carbon and nitrogen sources, inoculum size and aeration, were studied to determine the optimum conditions for both lipase production and immobilization in polyurethane support. Olive oil and soybean peptone were found to be the best carbon and nitrogen sources, respectively, to enhance the intracellular lipase activity. Low inoculum level and poor aeration rate also provided suitable conditions to attain high lipase activity (64.8 ± 0.8 U g(-1)). The transesterification activity of the immobilized whole- cells was assayed and optimal reaction conditions for the ethanolysis of babassu oil were determined by experimental design. Statistical analysis showed that M. circinelloides whole-cells were able to produce ethyl esters at all tested conditions, with the highest yield attained (98.1 %) at 35 °C using an 1:6 oil-to-ethanol molar ratio. The biocatalyst operational stability was also assayed in a continuous packed bed reactor (PBR) charged with glutaraldehyde (GA) and Aliquat-treated cells revealing half-life of 43.0 ± 0.5 and 20.0 ± 0.8 days, respectively. These results indicate the potential of immobilized M. circinelloides URM 4182 whole-cells as a low-cost alternative to conventional biocatalysts in the production of ethyl esters from babassu oil.
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Affiliation(s)
- Grazielle S S Andrade
- Science and Technology Institute, Federal University of Alfenas, Poços de Caldas, Minas Gerais, Brazil,
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Vincent M, Pometto AL, van Leeuwen JH. Ethanol production via simultaneous saccharification and fermentation of sodium hydroxide treated corn stover using Phanerochaete chrysosporium and Gloeophyllum trabeum. BIORESOURCE TECHNOLOGY 2014; 158:1-6. [PMID: 24561994 DOI: 10.1016/j.biortech.2014.01.083] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Revised: 01/16/2014] [Accepted: 01/20/2014] [Indexed: 06/03/2023]
Abstract
Ethanol was produced via the simultaneous saccharification and fermentation (SSF) of dilute sodium hydroxide treated corn stover. Saccharification was achieved by cultivating either Phanerochaete chrysosporium or Gloeophyllum trabeum on the treated stover, and fermentation was then performed by using either Saccharomyces cerevisiae or Escherichia coli K011. Ethanol production was highest on day 3 for the combination of G. trabeum and E. coli K011 at 6.68 g/100g stover, followed by the combination of P. chrysosporium and E. coli K011 at 5.00 g/100g stover. SSF with S. cerevisiae had lower ethanol yields, ranging between 2.88 g/100g stover at day 3 (P. chrysosporium treated stover) and 3.09 g/100g stover at day 4 (G. trabeum treated stover). The results indicated that mild alkaline pretreatment coupled with fungal saccharification offers a promising bioprocess for ethanol production from corn stover without the addition of commercial enzymes.
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Affiliation(s)
- Micky Vincent
- Department of Molecular Biology, Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia; Department of Civil, Construction, and Environmental Engineering, Iowa State University, Ames, IA 50011, United States; Biorenewable Resources and Technology Program, Iowa State University, Ames, IA 50011, United States
| | - Anthony L Pometto
- Department of Food, Nutrition, and Packaging Sciences, Clemson University, Clemson, SC 29634, United States
| | - J Hans van Leeuwen
- Department of Civil, Construction, and Environmental Engineering, Iowa State University, Ames, IA 50011, United States; Biorenewable Resources and Technology Program, Iowa State University, Ames, IA 50011, United States; Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA 50011, United States; Department of Food Science and Human Nutrition, Iowa State University, Ames, IA 50011, United States.
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Görgens JF, Bressler DC, van Rensburg E. EngineeringSaccharomyces cerevisiaefor direct conversion of raw, uncooked or granular starch to ethanol. Crit Rev Biotechnol 2014; 35:369-91. [DOI: 10.3109/07388551.2014.888048] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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25
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Ekpeni LE, Nkem-Ekpeni FF, Benyounis KY, Aboderheeba AK, Stokes J, Olabi A. Yeast: A Potential Biomass Substrate for the Production of Cleaner Energy (Biogas). ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.egypro.2014.12.199] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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26
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Tiwari S, Jadhav S, Sharma M, Tiwari K. Fermentation of Waste Fruits for Bioethanol Production. ACTA ACUST UNITED AC 2013. [DOI: 10.3923/ajbs.2014.30.34] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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27
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Stergiou PY, Foukis A, Filippou M, Koukouritaki M, Parapouli M, Theodorou LG, Hatziloukas E, Afendra A, Pandey A, Papamichael EM. Advances in lipase-catalyzed esterification reactions. Biotechnol Adv 2013; 31:1846-59. [DOI: 10.1016/j.biotechadv.2013.08.006] [Citation(s) in RCA: 270] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Revised: 08/02/2013] [Accepted: 08/05/2013] [Indexed: 11/30/2022]
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28
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Ye P, Xu YJ, Han ZP, Hu PC, Zhao ZL, Lu XL, Ni HG. Probing effects of bile salt on lipase adsorption at air/solution interface by sum frequency generation vibrational spectroscopy. Biochem Eng J 2013. [DOI: 10.1016/j.bej.2013.07.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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29
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Holmes-Smith AS, Hollas AC, McLoskey D, Hungerford G. Viability of Saccharomyces cerevisiae incorporated within silica and polysaccharide hosts monitored via time-resolved fluorescence. Photochem Photobiol Sci 2013; 12:2186-94. [PMID: 24145860 DOI: 10.1039/c3pp50202c] [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
The viability of Saccharomyces cerevisiae in biocompatible polymers under different growth conditions and studied using time-resolved fluorescence techniques is presented. Two fluorophores, the viscosity sensitive probe 4-(4-(dimethylamino)styryl)-N-methyl-pyridiniumiodine (DASPMI) and the yeast viability stain 2-chloro-4-(2,3-dihydro-3-methyl-(benzo-1,3-thiazol-2-yl)-methylidene)-1-phenylquinolinium iodide (FUN-1) are used to elucidate information on the incorporated yeast cell viability. Variations in cell viscosity, which are indicative of the cell state, were obtained using DASPMI. Prior to observing FUN-1 in yeast cells using fluorescence lifetime imaging, its photophysics in solution and heterogeneous media were investigated. Time-resolved emission spectra were measured and analysed to associate lifetimes to the spectral emission. Preliminary results show that monitoring the fluorescence lifetime of FUN-1 may give a useful insight into cellular metabolism. The results indicate that both fluorophores may be used to monitor the entrapped yeast cell viability, which is important for in vitro studies and applications, such as that in the biofuel industry, where Saccharomyces cerevisiae are required to remain active in high ethanol environments.
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Affiliation(s)
- A Sheila Holmes-Smith
- School of Engineering and Built Environment, Glasgow Caledonian University, Cowcaddens Road, Glasgow, G4 0BA, UK.
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Ries L, Pullan ST, Delmas S, Malla S, Blythe MJ, Archer DB. Genome-wide transcriptional response of Trichoderma reesei to lignocellulose using RNA sequencing and comparison with Aspergillus niger. BMC Genomics 2013; 14:541. [PMID: 24060058 PMCID: PMC3750697 DOI: 10.1186/1471-2164-14-541] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Accepted: 08/06/2013] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND A major part of second generation biofuel production is the enzymatic saccharification of lignocellulosic biomass into fermentable sugars. Many fungi produce enzymes that can saccarify lignocellulose and cocktails from several fungi, including well-studied species such as Trichoderma reesei and Aspergillus niger, are available commercially for this process. Such commercially-available enzyme cocktails are not necessarily representative of the array of enzymes used by the fungi themselves when faced with a complex lignocellulosic material. The global induction of genes in response to exposure of T. reesei to wheat straw was explored using RNA-seq and compared to published RNA-seq data and model of how A. niger senses and responds to wheat straw. RESULTS In T. reesei, levels of transcript that encode known and predicted cell-wall degrading enzymes were very high after 24h exposure to straw (approximately 13% of the total mRNA) but were less than recorded in A. niger (approximately 19% of the total mRNA). Closer analysis revealed that enzymes from the same glycoside hydrolase families but different carbohydrate esterase and polysaccharide lyase families were up-regulated in both organisms. Accessory proteins which have been hypothesised to possibly have a role in enhancing carbohydrate deconstruction in A. niger were also uncovered in T. reesei and categories of enzymes induced were in general similar to those in A. niger. Similarly to A. niger, antisense transcripts are present in T. reesei and their expression is regulated by the growth condition. CONCLUSIONS T. reesei uses a similar array of enzymes, for the deconstruction of a solid lignocellulosic substrate, to A. niger. This suggests a conserved strategy towards lignocellulose degradation in both saprobic fungi. This study provides a basis for further analysis and characterisation of genes shown to be highly induced in the presence of a lignocellulosic substrate. The data will help to elucidate the mechanism of solid substrate recognition and subsequent degradation by T. reesei and provide information which could prove useful for efficient production of second generation biofuels.
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Affiliation(s)
- Laure Ries
- School of Biology, University of Nottingham, Nottingham NG7 2RD, UK
| | - Steven T Pullan
- School of Biology, University of Nottingham, Nottingham NG7 2RD, UK
| | - Stéphane Delmas
- School of Biology, University of Nottingham, Nottingham NG7 2RD, UK
- Université Pierre et Marie Curie (UPMC, Université Paris 06), Sorbonne Universités, UMR 7138, Systématique Adapation et Évolution, 75005 Paris, France
| | - Sunir Malla
- Deep Seq, Centre for Genetics and Genomics, Queen’s Medical Centre, University of Nottingham, Nottingham NG7 2UH, UK
| | - Martin J Blythe
- Deep Seq, Centre for Genetics and Genomics, Queen’s Medical Centre, University of Nottingham, Nottingham NG7 2UH, UK
| | - David B Archer
- School of Biology, University of Nottingham, Nottingham NG7 2RD, UK
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31
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Kim SB, Lee SJ, Lee JH, Jung YR, Thapa LP, Kim JS, Um Y, Park C, Kim SW. Pretreatment of rice straw with combined process using dilute sulfuric acid and aqueous ammonia. BIOTECHNOLOGY FOR BIOFUELS 2013; 6:109. [PMID: 23898802 PMCID: PMC3734028 DOI: 10.1186/1754-6834-6-109] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Accepted: 07/26/2013] [Indexed: 05/06/2023]
Abstract
BACKGROUND Use of lignocellulosic biomass has received attention lately because it can be converted into various versatile chemical compounds by biological processes. In this study, a two-step pretreatment with dilute sulfuric acid and aqueous ammonia was performed efficiently on rice straw to obtain fermentable sugar. The soaking in aqueous ammonia process was also optimized by a statistical method. RESULTS Response surface methodology was employed. The determination coefficient (R(2)) value was found to be 0.9607 and the coefficient of variance was 6.77. The optimal pretreatment conditions were a temperature of 42.75°C, an aqueous ammonia concentration of 20.93%, and a reaction time of 48 h. The optimal enzyme concentration for saccharification was 30 filter paper units. The crystallinity index was approximately 60.23% and the Fourier transform infrared results showed the distinct peaks of glucan. Ethanol production using Saccharomyces cerevisiae K35 was performed to verify whether the glucose saccharified from rice straw was fermentable. CONCLUSIONS The combined pretreatment using dilute sulfuric acid and aqueous ammonia on rice straw efficiently yielded fermentable sugar and achieved almost the same crystallinity index as that of α-cellulose.
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Affiliation(s)
- Sung Bong Kim
- Department of Chemical and Biological Engineering, Korea University, Seoul, 136-701, South Korea
| | - Sang Jun Lee
- Department of Chemical and Biological Engineering, Korea University, Seoul, 136-701, South Korea
| | - Ju Hun Lee
- Department of Chemical and Biological Engineering, Korea University, Seoul, 136-701, South Korea
| | - You Ree Jung
- Department of Chemical and Biological Engineering, Korea University, Seoul, 136-701, South Korea
| | - Laxmi Prasad Thapa
- Department of Chemical and Biological Engineering, Korea University, Seoul, 136-701, South Korea
| | - Jun Seok Kim
- Department of Chemical Engineering, Kyonggi University, Suwon 443-760, South Korea
| | - Youngsoon Um
- Clean Energy Research Center, Korea Institute of Science and Technology, Seoul 136-791, South Korea
| | - Chulhwan Park
- Department of Chemical Engineering, Kwangwoon University, Seoul 139-701, South Korea
| | - Seung Wook Kim
- Department of Chemical and Biological Engineering, Korea University, Seoul, 136-701, South Korea
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32
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Andrade GS, Freitas L, Oliveira PC, de Castro HF. Screening, immobilization and utilization of whole cell biocatalysts to mediate the ethanolysis of babassu oil. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcatb.2012.02.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Repeated fermentation from raw starch using Saccharomyces cerevisiae displaying both glucoamylase and α-amylase. Enzyme Microb Technol 2012; 50:343-7. [DOI: 10.1016/j.enzmictec.2012.03.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Revised: 03/12/2012] [Accepted: 03/12/2012] [Indexed: 11/21/2022]
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35
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Marques MP, Walshe K, Doyle S, Fernandes P, de Carvalho CC. Anchoring high-throughput screening methods to scale-up bioproduction of siderophores. Process Biochem 2012. [DOI: 10.1016/j.procbio.2011.11.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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Favaro L, Jooste T, Basaglia M, Rose SH, Saayman M, Görgens JF, Casella S, van Zyl WH. Designing industrial yeasts for the consolidated bioprocessing of starchy biomass to ethanol. Bioengineered 2012; 4:97-102. [PMID: 22989992 DOI: 10.4161/bioe.22268] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Consolidated bioprocessing (CBP), which integrates enzyme production, saccharification and fermentation into a one step process, is a promising strategy for the effective ethanol production from cheap lignocellulosic and starchy materials. CBP requires a highly engineered microbial strain able to both hydrolyze biomass with enzymes produced on its own and convert the resulting simple sugars into high-titer ethanol. Recently, heterologous production of cellulose and starch-degrading enzymes has been achieved in yeast hosts, which has realized direct processing of biomass to ethanol. However, essentially all efforts aimed at the efficient heterologous expression of saccharolytic enzymes in yeast have involved laboratory strains and much of this work has to be transferred to industrial yeasts that provide the fermentation capacity and robustness desired for large scale bioethanol production. Specifically, the development of an industrial CBP amylolytic yeast would allow the one-step processing of low-cost starchy substrates into ethanol. This article gives insight in the current knowledge and achievements on bioethanol production from starchy materials with industrial engineered S. cerevisiae strains.
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Affiliation(s)
- Lorenzo Favaro
- Department of Agronomy Food Natural Resources Animals and Environment (DAFNAE), University of Padova, Agripolis, Italy
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Gochev V, Montero G, Kostov G, Toscano L, Stoytcheva M, Krastanov A, Georgieva A. Nutritive Medium Engineering Enhanced Production of Extracellular Lipase by Trichoderma Longibrachiatum. BIOTECHNOL BIOTEC EQ 2012. [DOI: 10.5504/bbeq.2011.0138] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Affiliation(s)
- Velizar Gochev
- University of Plovdiv “Paisii Hilendarski”, Department of Biochemistry and Microbiology, Plovdiv, Bulgaria
| | | | - George Kostov
- University of Food Technologies, Department of Technology of Wine and Brewing, Plovdiv, Bulgaria
| | - Lydia Toscano
- Technological Institute of Mexicali, Mexicali, B.C., Mexico
| | | | - Albert Krastanov
- University of Food Technologies, Department of Biotechnology, Plovdiv, Bulgaria
| | - Atanaska Georgieva
- University of Plovdiv „Paisii Hilendarski”, Department of Mathematical Analysis, Plovdiv, Bulgaria
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38
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Klein M, Pulidindi IN, Perkas N, Meltzer-Mats E, Gruzman A, Gedanken A. Direct production of glucose from glycogen under microwave irradiation. RSC Adv 2012. [DOI: 10.1039/c2ra21066e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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39
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Kim SB, Lee JH, Oh KK, Lee SJ, Lee JY, Kim JS, Kim SW. Dilute acid pretreatment of barley straw and its saccharification and fermentation. BIOTECHNOL BIOPROC E 2011. [DOI: 10.1007/s12257-010-0305-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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40
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Jäger G, Girfoglio M, Dollo F, Rinaldi R, Bongard H, Commandeur U, Fischer R, Spiess AC, Büchs J. How recombinant swollenin from Kluyveromyces lactis affects cellulosic substrates and accelerates their hydrolysis. BIOTECHNOLOGY FOR BIOFUELS 2011; 4:33. [PMID: 21943248 PMCID: PMC3203333 DOI: 10.1186/1754-6834-4-33] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Accepted: 09/23/2011] [Indexed: 05/02/2023]
Abstract
BACKGROUND In order to generate biofuels, insoluble cellulosic substrates are pretreated and subsequently hydrolyzed with cellulases. One way to pretreat cellulose in a safe and environmentally friendly manner is to apply, under mild conditions, non-hydrolyzing proteins such as swollenin - naturally produced in low yields by the fungus Trichoderma reesei. To yield sufficient swollenin for industrial applications, the first aim of this study is to present a new way of producing recombinant swollenin. The main objective is to show how swollenin quantitatively affects relevant physical properties of cellulosic substrates and how it affects subsequent hydrolysis. RESULTS After expression in the yeast Kluyveromyces lactis, the resulting swollenin was purified. The adsorption parameters of the recombinant swollenin onto cellulose were quantified for the first time and were comparable to those of individual cellulases from T. reesei. Four different insoluble cellulosic substrates were then pretreated with swollenin. At first, it could be qualitatively shown by macroscopic evaluation and microscopy that swollenin caused deagglomeration of bigger cellulose agglomerates as well as dispersion of cellulose microfibrils (amorphogenesis). Afterwards, the effects of swollenin on cellulose particle size, maximum cellulase adsorption and cellulose crystallinity were quantified. The pretreatment with swollenin resulted in a significant decrease in particle size of the cellulosic substrates as well as in their crystallinity, thereby substantially increasing maximum cellulase adsorption onto these substrates. Subsequently, the pretreated cellulosic substrates were hydrolyzed with cellulases. Here, pretreatment of cellulosic substrates with swollenin, even in non-saturating concentrations, significantly accelerated the hydrolysis. By correlating particle size and crystallinity of the cellulosic substrates with initial hydrolysis rates, it could be shown that the swollenin-induced reduction in particle size and crystallinity resulted in high cellulose hydrolysis rates. CONCLUSIONS Recombinant swollenin can be easily produced with the robust yeast K. lactis. Moreover, swollenin induces deagglomeration of cellulose agglomerates as well as amorphogenesis (decrystallization). For the first time, this study quantifies and elucidates in detail how swollenin affects different cellulosic substrates and their hydrolysis.
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Affiliation(s)
- Gernot Jäger
- AVT-Aachener Verfahrenstechnik, Biochemical Engineering, RWTH Aachen University,
Worringerweg 1, D-52074 Aachen, Germany
| | - Michele Girfoglio
- Institute of Molecular Biotechnology, RWTH Aachen University, Worringerweg 1,
D-52074 Aachen, Germany
| | - Florian Dollo
- AVT-Aachener Verfahrenstechnik, Biochemical Engineering, RWTH Aachen University,
Worringerweg 1, D-52074 Aachen, Germany
| | - Roberto Rinaldi
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470
Mülheim an der Ruhr, Germany
| | - Hans Bongard
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470
Mülheim an der Ruhr, Germany
| | - Ulrich Commandeur
- Institute of Molecular Biotechnology, RWTH Aachen University, Worringerweg 1,
D-52074 Aachen, Germany
| | - Rainer Fischer
- Institute of Molecular Biotechnology, RWTH Aachen University, Worringerweg 1,
D-52074 Aachen, Germany
- Fraunhofer Institute for Molecular Biology and Applied Ecology (IME),
Forckenbeckstrasse 6, D-52074 Aachen, Germany
| | - Antje C Spiess
- AVT-Aachener Verfahrenstechnik, Enzyme Process Technology, RWTH Aachen University,
Worringerweg 1, D-52074 Aachen, Germany
| | - Jochen Büchs
- AVT-Aachener Verfahrenstechnik, Biochemical Engineering, RWTH Aachen University,
Worringerweg 1, D-52074 Aachen, Germany
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Cook C, Devoto A. Fuel from plant cell walls: recent developments in second generation bioethanol research. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2011; 91:1729-32. [PMID: 21681755 DOI: 10.1002/jsfa.4455] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
As bioethanol from sugarcane and wheat falls out of favour due to concerns about food security, research is ongoing into genetically engineering model plants and microorganisms to find the optimum cell wall structure for the ultimate second generation bioethanol crop. Charis Cook and Alessandra Devoto highlight here the progress made to tailor the plant cell wall to improve the accessibility of cellulose by acting on the regulation, the structure or the relative composition of other cell wall components to ultimately improve saccharification efficiency. They also consider possible side effects of cell wall modification and focus on the latest advances made to improve the efficiency of digestion of lignocellulosic materials by cell wall degrading microorganisms.
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Affiliation(s)
- Charis Cook
- Biological Sciences, Royal Holloway, University of London, Egham Hill, Egham, Surrey TW200EX, UK.
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42
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Zain MM, Kofli NT, Rozaimah S, Abdullah S. Immobilised Sarawak Malaysia yeast cells for production of bioethanol. Pak J Biol Sci 2011; 14:526-32. [PMID: 22032081 DOI: 10.3923/pjbs.2011.526.532] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Bioethanol production using yeast has become a popular topic due to worrying depleting worldwide fuel reserve. The aim of the study was to investigate the capability of Malaysia yeast strains isolated from starter culture used in traditional fermented food and alcoholic beverages in producing Bioethanol using alginate beads entrapment method. The starter yeast consists of groups of microbes, thus the yeasts were grown in Sabouraud agar to obtain single colony called ST1 (tuak) and ST3 (tapai). The growth in Yeast Potatoes Dextrose (YPD) resulted in specific growth of ST1 at micro = 0.396 h-1 and ST3 at micro = 0.38 h-1, with maximum ethanol production of 7.36 g L-1 observed using ST1 strain. The two strains were then immobilized using calcium alginate entrapment method producing average alginate beads size of 0.51 cm and were grown in different substrates; YPD medium and Local Brown Sugar (LBS) for 8 h in flask. The maximum ethanol concentration measured after 7 h were at 6.63 and 6.59 g L-1 in YPD media and 1.54 and 1.39 g L-1in LBS media for ST1 and ST3, respectively. The use of LBS as carbon source showed higher yield of product (Yp/s), 0.59 g g-1 compared to YPD, 0.25 g g-1 in ST1 and (Yp/s), 0.54 g g-1 compared to YPD, 0.24 g g-1 in ST3 . This study indicated the possibility of using local strains (STI and ST3) to produce bioethanol via immobilization technique with local materials as substrate.
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Affiliation(s)
- Masniroszaime Mohd Zain
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
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43
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Novel three-phase bioreactor concept for fatty acid alkyl ester production using R. oryzae as whole cell catalyst. World J Microbiol Biotechnol 2011. [DOI: 10.1007/s11274-011-0719-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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44
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Kim SB, Kim JS, Lee JH, Kang SW, Park C, Kim SW. Pretreatment of Rice Straw by Proton Beam Irradiation for Efficient Enzyme Digestibility. Appl Biochem Biotechnol 2011; 164:1183-91. [DOI: 10.1007/s12010-011-9204-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2010] [Accepted: 02/08/2011] [Indexed: 10/18/2022]
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45
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Jäger G, Wulfhorst H, Zeithammel EU, Elinidou E, Spiess AC, Büchs J. Screening of cellulases for biofuel production: Online monitoring of the enzymatic hydrolysis of insoluble cellulose using high-throughput scattered light detection. Biotechnol J 2010; 6:74-85. [DOI: 10.1002/biot.201000387] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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46
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Widiastuti H, Kim JY, Selvarasu S, Karimi IA, Kim H, Seo JS, Lee DY. Genome-scale modeling and in silico analysis of ethanologenic bacteria Zymomonas mobilis. Biotechnol Bioeng 2010; 108:655-65. [PMID: 20967753 DOI: 10.1002/bit.22965] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Revised: 08/23/2010] [Accepted: 09/24/2010] [Indexed: 01/25/2023]
Abstract
Bioethanol has been recognized as a potential alternative energy source. Among various ethanol-producing microbes, Zymomonas mobilis has acquired special attention due to its higher ethanol yield and tolerance. However, cellular metabolism in Z. mobilis remains unclear, hindering its practical application for bioethanol production. To elucidate such physiological characteristics, we reconstructed and validated a genome-scale metabolic network (iZM363) of Z. mobilis ATCC31821 (ZM4) based on its annotated genome and biochemical information. The phenotypic behaviors and metabolic states predicted by our genome-scale model were highly consistent with the experimental observations of Z. mobilis ZM4 strain growing on glucose as well as NMR-measured intracellular fluxes of an engineered strain utilizing glucose, fructose, and xylose. Subsequent comparative analysis with Escherichia coli and Saccharomyces cerevisiae as well as gene essentiality and flux coupling analyses have also confirmed the functional role of pdc and adh genes in the ethanologenic activity of Z. mobilis, thus leading to better understanding of this natural ethanol producer. In future, the current model could be employed to identify potential cell engineering targets, thereby enhancing the productivity of ethanol in Z. mobilis.
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Affiliation(s)
- Hanifah Widiastuti
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, Singapore
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Sarkar A, Ghosh SK, Pramanik P. Investigation of the catalytic efficiency of a new mesoporous catalyst SnO2/WO3 towards oleic acid esterification. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.molcata.2010.05.015] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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48
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Repeated batch fermentation from raw starch using a maltose transporter and amylase expressing diploid yeast strain. Appl Microbiol Biotechnol 2010; 87:109-15. [DOI: 10.1007/s00253-010-2487-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2010] [Revised: 01/28/2010] [Accepted: 01/30/2010] [Indexed: 10/19/2022]
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49
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Moniruzzaman M, Nakashima K, Kamiya N, Goto M. Recent advances of enzymatic reactions in ionic liquids. Biochem Eng J 2010. [DOI: 10.1016/j.bej.2009.10.002] [Citation(s) in RCA: 376] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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50
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Zheng MY, Wang AQ, Ji N, Pang JF, Wang XD, Zhang T. Transition metal-tungsten bimetallic catalysts for the conversion of cellulose into ethylene glycol. CHEMSUSCHEM 2010; 3:63-66. [PMID: 19998362 DOI: 10.1002/cssc.200900197] [Citation(s) in RCA: 117] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Affiliation(s)
- Ming-Yuan Zheng
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, P.O. Box 110, Dalian 116023, PR China
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