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Fibriana F, Upaichit A, Cheirsilp B. Promoting Magnusiomyces spicifer AW2 Cell-Bound Lipase Production by Co-culturing with Staphylococcus hominis AUP19 and Its Application in Solvent-Free Biodiesel Synthesis. Curr Microbiol 2023; 80:307. [PMID: 37515625 DOI: 10.1007/s00284-023-03394-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 06/28/2023] [Indexed: 07/31/2023]
Abstract
Yeast-bacterium interaction has recently been investigated to benefit the production of cell-bound lipases (CBLs). Staphylococcus hominis AUP19 supported the growth of Magnusiomyces spicifer AW2 in a palm oil mill effluent (POME) medium to produce CBLs through a bioremediation approach, including oil and grease (O&G) and chemical oxygen demand (COD) removals. This research used the yeast-bacterium co-culture to optimize CBLs and cell biomass (CBM) productions through bioremediation using the statistical Plackett-Burman design and response surface methodology-central composite design. The CBLs were finally applied in biodiesel synthesis. The CBM of 13.8 g/L with CBLs activity at 3391 U/L was achieved after incubation at room temperature (RT, 30 ± 2 °C) for 140 h in 50% POME medium, pH 7.0, containing 1.23% (w/v) ammonium sulfate. Bacterium promoted yeast growth to achieve bioremediation with 87.9% O&G removal and 84.5% COD removal. Time course study showed that the CBLs activity was highest at 24 h cultivation (4103 U/L) and retained 80% and 60% of activities at 4 °C and RT after 5 weeks of storage. The CBLs application successfully yielded 77.3% biodiesel from oleic acid (esterification) and 86.4% biodiesel from palm oil (transesterification) within 72 h in solvent-free systems. This study highlights that yeast-bacterium co-culture and POME should receive more attention for potential low-cost CBLs production through bioremediation, i.e., O&G and COD removals, while the CBLs as biocatalysts are promising for significant contribution to an effective strategy for economic green biodiesel production.
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Affiliation(s)
- Fidia Fibriana
- International Program of Biotechnology, Molecular Biotechnology Laboratory, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand
- Faculty of Mathematics and Natural Sciences, Universitas Negeri Semarang, Semarang, Central Java, 50229, Indonesia
| | - Apichat Upaichit
- International Program of Biotechnology, Molecular Biotechnology Laboratory, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand.
- Center of Excellence in Innovative Biotechnology for Sustainable Utilization of Bioresources, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand.
| | - Benjamas Cheirsilp
- Center of Excellence in Innovative Biotechnology for Sustainable Utilization of Bioresources, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand
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2
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Ma D, Li Y, Chen C, Fan S, Zhou Y, Deng F, Zhao L. Microbial succession and its correlation with the dynamics of volatile compounds involved in fermented minced peppers. Front Nutr 2022; 9:1041608. [DOI: 10.3389/fnut.2022.1041608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Accepted: 10/03/2022] [Indexed: 11/13/2022] Open
Abstract
Fermented minced peppers are a traditional fermented food that has a unique flavor due to various microbial communities involved in fermentation. Understanding the changes in microbial communities and volatile components of fermented minced peppers is particularly important to unveil the formation of unique flavor of fermented peppers. In this study, the microbial communities and volatile compounds in fermented minced pepper was analyzed by high-throughput sequencing and GC-MS, as well as their underlying correlations were also established. Results indicated that 17 genera were identified as dominant microorganisms in the fermentation of minced pepper, accompanied by the detection of 64 volatile compounds. Further hierarchical clustering analysis (HCA) displayed that dynamic change of volatile metabolites were involved in the fermentation process, where alkane volatile components were mainly generated in the early stage (3–5 days), and alcohols volatile components were in the middle stage (7–17 days), while ester volatile components were mainly produced in both the early stage (3–5 days) and last stage (17–20 days). Bidirectional orthogonal partial least squares (O2PLS) analysis revealed that 11 genera were core functional microorganisms of fermented minced pepper. Cladosporium and Hansenpora were significantly correlated with the formation of 9 and 6 volatiles, respectively. These findings provide new insights into aroma profile variation of fermented minced peppers and underlying mechanism of characteristic aroma formation during fermentation.
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Abstract
Lipases are efficient enzymes with promising applications in the nutraceutical and food industry, as they can offer high yields, pure products under achievable reaction conditions, and are an environmentally friendly option. This review addresses the production of high-value-added compounds such as fatty acid esters, with the potential to be used as flavoring agents or antioxidant and antimicrobial agents, as well as structured lipids that offer specific functional properties that do not exist in nature, with important applications in different food products, and pharmaceuticals. In addition, the most recent successful cases of reactions with lipases to produce modified compounds for food and nutraceuticals are reported.
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4
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Catalytically active membranes for esterification: A review. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2022.03.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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5
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Applicability of mesoporous silica type SBA-15 as feasible support for the immobilization of Yarrowia lipolytica lipase and Candida antarctica lipase B. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2022. [DOI: 10.1007/s43153-021-00218-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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6
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Shrimp protected from a virus by feed containing yeast with a surface-displayed viral binding protein. J Biotechnol 2021; 342:45-53. [PMID: 34619240 DOI: 10.1016/j.jbiotec.2021.09.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 09/07/2021] [Accepted: 09/23/2021] [Indexed: 10/20/2022]
Abstract
Recombinant Pichia pastoris biomass surface-expressing the viral binding protein PmRab7 (YSD-PmRab7) was prepared by fed-batch, aerobic fermentation with methanol induction for 48 h. By cell based ELISA assay, immunofluorescence and flow cytometry, 45% of the YSD-PmRab7 cells were positive for PmRab7. Freeze dried YSD-PmRab7 cells were added to formulated shrimp feed pellets at 0.25 g and 0.5 g per g feed and fed to 2 shrimp groups for 7 days prior to challenge with white spot syndrome virus (WSSV). Controls consisted of 1 shrimp group fed normal pellets and one fed pellets containing P. pastoris carrying an empty gene cassette. At 10 days post challenge, survival in the two control groups was 6.7 ± 6.6%, while it was 26.7 ± 6.6% in the 0.25 g YSD-PmRab7 group and significantly higher (p < 0.05) in the 0.5 g YSD-PmRab7 group at 46.7 ± 10.1%. Nested PCR assays and histopathological analysis revealed significantly lower WSSV replication levels in the 0.5 g YSD-PmRab7 group. The results indicated potential for development of YSD-PmRab7 cells as an oral prophylactic against WSSV in shrimp.
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7
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Expression and characterization of a CALB-type lipase from Sporisorium reilianum SRZ2 and its potential in short-chain flavor ester synthesis. Front Chem Sci Eng 2020. [DOI: 10.1007/s11705-019-1889-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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8
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Chacón MG, Kendrick EG, Leak DJ. Engineering Escherichia coli for the production of butyl octanoate from endogenous octanoyl-CoA. PeerJ 2019; 7:e6971. [PMID: 31304053 PMCID: PMC6610577 DOI: 10.7717/peerj.6971] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 04/18/2019] [Indexed: 11/20/2022] Open
Abstract
Medium chain esters produced from fruits and flowering plants have a number of commercial applications including use as flavour and fragrance ingredients, biofuels, and in pharmaceutical formulations. These esters are typically made via the activity of an alcohol acyl transferase (AAT) enzyme which catalyses the condensation of an alcohol and an acyl-CoA. Developing a microbial platform for medium chain ester production using AAT activity presents several obstacles, including the low product specificity of these enzymes for the desired ester and/or low endogenous substrate availability. In this study, we engineered Escherichia coli for the production of butyl octanoate from endogenously produced octanoyl-CoA. This was achieved through rational protein engineering of an AAT enzyme from Actinidia chinensis for improved octanoyl-CoA substrate specificity and metabolic engineering of E. coli fatty acid metabolism for increased endogenous octanoyl-CoA availability. This resulted in accumulation of 3.3 + 0.1 mg/L butyl octanoate as the sole product from E. coli after 48 h. This study represents a preliminary examination of the feasibility of developing E. coli platforms for the synthesis single medium chain esters from endogenous fatty acids.
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Affiliation(s)
- Micaela G Chacón
- Department of Biology and Biochemistry, University of Bath, Bath, England
| | | | - David J Leak
- Department of Biology and Biochemistry, University of Bath, Bath, England
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9
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Zhu T, Sun H, Wang M, Li Y. Pichia pastoris
as a Versatile Cell Factory for the Production of Industrial Enzymes and Chemicals: Current Status and Future Perspectives. Biotechnol J 2019; 14:e1800694. [DOI: 10.1002/biot.201800694] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 04/19/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Taicheng Zhu
- CAS Key Laboratory of Microbial Physiological and Metabolic EngineeringState Key Laboratory of Microbial ResourcesInstitute of MicrobiologyChinese Academy of SciencesBeijing 100101 P. R. China
| | - Hongbing Sun
- Tianjin Institute of Industrial BiotechnologyChinese Academy of SciencesTianjin 300308 China
| | - Meiyu Wang
- CAS Key Laboratory of Microbial Physiological and Metabolic EngineeringState Key Laboratory of Microbial ResourcesInstitute of MicrobiologyChinese Academy of SciencesBeijing 100101 P. R. China
- University of Chinese Academy of SciencesBeijing 100190 China
| | - Yin Li
- CAS Key Laboratory of Microbial Physiological and Metabolic EngineeringState Key Laboratory of Microbial ResourcesInstitute of MicrobiologyChinese Academy of SciencesBeijing 100101 P. R. China
- Tianjin Institute of Industrial BiotechnologyChinese Academy of SciencesTianjin 300308 China
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de Souza CEC, Ribeiro BD, Coelho MAZ. Characterization and Application of Yarrowia lipolytica Lipase Obtained by Solid-State Fermentation in the Synthesis of Different Esters Used in the Food Industry. Appl Biochem Biotechnol 2019; 189:933-959. [DOI: 10.1007/s12010-019-03047-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 05/10/2019] [Indexed: 10/26/2022]
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11
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Virus-like organosilica nanoparticles for lipase immobilization: Characterization and biocatalytic applications. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2019.01.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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12
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Brämer C, Schreiber S, Scheper T, Beutel S. Continuous purification of Candida antarctica lipase B using 3-membrane adsorber periodic counter-current chromatography. Eng Life Sci 2018; 18:414-424. [PMID: 32624922 PMCID: PMC6999568 DOI: 10.1002/elsc.201700159] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 03/23/2018] [Accepted: 03/26/2018] [Indexed: 01/02/2023] Open
Abstract
Batch chromatography has several disadvantages, such as insufficient utilization of the capacity of the resin, high buffer consumption and discontinuity. Considering the high costs for downstream processing, a continuously working chromatographic system with three membrane adsorber units was designed, tested and put into operation. The basic principle of the setup is periodic counter-current chromatography (PCCC). The PCCC system was used for capturing and purifying Candida antarctica lipase B (CalB) directly from cell lysate in one single unit operation. The best purification result was achieved by means of anion-exchange chromatography. The dynamic binding capacity with Sartobind® Q 75 amounted to 4.2 mg (56 g/cm2). After transferring the method to the 3MA-PCCC, 0.22 g CalB (73 U/mg) were obtained from 0.9 L E. coli lysate within 6 h and a recovery of 80%. Compared to the batch process, the productivity could be increased by 36% and the buffer consumption could be reduced by about 20%. Although the purification of CalB from lysate by means of anion-exchange chromatography was not selective and quantitative using the 3MA-PCCC device, it could be shown that the concept of the system was successfully implemented and led to a significant improvement of CalB purification.
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Affiliation(s)
- Chantal Brämer
- Institute of Technical ChemistryGottfried Wilhelm Leibniz University of HanoverHanoverGermany
| | - Sarah Schreiber
- Institute of Technical ChemistryGottfried Wilhelm Leibniz University of HanoverHanoverGermany
| | - Thomas Scheper
- Institute of Technical ChemistryGottfried Wilhelm Leibniz University of HanoverHanoverGermany
| | - Sascha Beutel
- Institute of Technical ChemistryGottfried Wilhelm Leibniz University of HanoverHanoverGermany
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13
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Zhang K, Pan Z, Diao Z, Liang S, Han S, Zheng S, Lin Y. Kinetic resolution of sec -alcohols catalysed by Candida antarctica lipase B displaying Pichia pastoris whole-cell biocatalyst. Enzyme Microb Technol 2018; 110:8-13. [DOI: 10.1016/j.enzmictec.2017.11.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 11/05/2017] [Accepted: 11/13/2017] [Indexed: 11/30/2022]
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14
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Zhang K, Lin Y, Diao ZJ, Zhang WH, Zheng SP, Liang SL, Han SY. Enzymatic Process Enhances the Flavour Profile and Increases the Proportion of Esters in Citrus Essential Oils. Chem Biodivers 2017; 14. [DOI: 10.1002/cbdv.201700187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 06/30/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Kun Zhang
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering; School of Biology and Biological Engineering; South China University of Technology; Guangzhou 510006 P. R. China
| | - Ying Lin
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering; School of Biology and Biological Engineering; South China University of Technology; Guangzhou 510006 P. R. China
| | - Zhou-Jian Diao
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering; School of Biology and Biological Engineering; South China University of Technology; Guangzhou 510006 P. R. China
| | - Wei-Hua Zhang
- Guangzhou Suntas Flavour & Fragrance Co. Ltd.; Guangzhou Guangdong 510006 P. R. China
| | - Sui-Ping Zheng
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering; School of Biology and Biological Engineering; South China University of Technology; Guangzhou 510006 P. R. China
| | - Shu-Li Liang
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering; School of Biology and Biological Engineering; South China University of Technology; Guangzhou 510006 P. R. China
| | - Shuang-Yan Han
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering; School of Biology and Biological Engineering; South China University of Technology; Guangzhou 510006 P. R. China
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15
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Enhanced synthesis of isoamyl acetate using liquid-gas biphasic system by the transesterification reaction of isoamyl alcohol obtained from fusel oil. BIOTECHNOL BIOPROC E 2017. [DOI: 10.1007/s12257-016-0616-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Improving the catalytic characteristics of lipase-displaying yeast cells by hydrophobic modification. Bioprocess Biosyst Eng 2017; 40:1689-1699. [DOI: 10.1007/s00449-017-1824-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 07/30/2017] [Indexed: 10/19/2022]
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17
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Kirdi R, Akacha NB, Bejaoui H, Messaoudi Y, Romano D, Molinari F, Gargouri M. Mycelium-bound lipase from Aspergillus oryzae as efficient biocatalyst for cis-3-hexen-1-yl acetate synthesis in organic solvent. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2017. [DOI: 10.1016/j.bcab.2017.01.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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18
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Pan Z, Jin S, Zhang X, Zheng S, Han S, Pan L, Lin Y. Biocatalytic behavior of a new Aspergillus niger whole-cell biocatalyst with high operational stability during the synthesis of green biosolvent isopropyl esters. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcatb.2016.05.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Thermomyces lanuginosus lipase-catalyzed synthesis of natural flavor esters in a continuous flow microreactor. 3 Biotech 2016; 6:24. [PMID: 28330099 PMCID: PMC4711288 DOI: 10.1007/s13205-015-0355-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Accepted: 12/24/2015] [Indexed: 12/17/2022] Open
Abstract
Enzymatic catalysis is considered to be among the most environmental friendly processes for the synthesis of fine chemicals. In this study, lipase from Thermomyces lanuginosus (Lecitase Ultra™) was used to catalyze the synthesis of flavor esters, i.e., methyl butanoate and methyl benzoate by esterification of the acids with methanol in a microfluidic system. Maximum reaction rates of 195 and 115 mM min−1 corresponding to catalytic efficiencies (kcat/KM) of 0.30 and 0.24 min−1 mM−1 as well as yield conversion of 54 and 41 % were observed in methyl butanoate and methyl benzoate synthesis, respectively. Catalytic turnover (kcat) was higher for methyl butanoate synthesis. Rate of synthesis and yield decreased with increasing flow rates. For both esters, increase in microfluidic flow rate resulted in increased advective transport over molecular diffusion and reaction rate, thus lower conversion. In microfluidic synthesis using T. lanuginosus lipase, the following reaction conditions were 40 °C, flow rate 0.1 mL min−1, and 123 U g−1 enzyme loading found to be the optimum operating limits. The work demonstrated the application of enzyme(s) in a microreactor system for the synthesis of industrially important esters.
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20
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Li M, Yang LR, Xu G, Wu JP. Cloning and characterization of a novel lipase from Stenotrophomonas maltophilia GS11: The first member of a new bacterial lipase family XVI. J Biotechnol 2016; 228:30-36. [PMID: 27117245 DOI: 10.1016/j.jbiotec.2016.04.034] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 04/18/2016] [Accepted: 04/19/2016] [Indexed: 12/24/2022]
Abstract
Bacterial lipases are an important group of enzymes that offer enormous potential in organic synthesis, and there is considerable interest in identifying and developing novel bacterial lipases. In previous studies, strains of the genus Stenotrophomonas were proved to be potential source of lipases, but there is little genetic information describing lipase from the genus Stenotrophomonas. We have cloned and characterized a novel lipase (LipSM54), the first lipase described from the genus Stenotrophomonas. Enzymatic study showed that LipSM54 was a cold-active, solvent-tolerant and alkaline lipase. Using bioinformatics tools, LipSM54 was found to be related only to several putative lipases from different bacterial origins, none of which could be assigned to any previously described bacterial lipase family. LipSM54 and these related putative lipases share four conserved motifs around the catalytic residues. These motifs clearly distinguish them from the known bacterial lipase families. Consequently, LipSM54 is the first characterized member of the novel bacterial lipase family.
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Affiliation(s)
- Mu Li
- Key Laboratory of Environment Correlative Dietology, Huazhong Agricultural University, Ministry of Education, Wuhan, 430070, Hubei, People's Republic of China; College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, People's Republic of China; Institute of Bioengineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, People's Republic of China
| | - Li-Rong Yang
- Institute of Bioengineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, People's Republic of China
| | - Gang Xu
- Institute of Bioengineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, People's Republic of China
| | - Jian-Ping Wu
- Institute of Bioengineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, People's Republic of China.
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21
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Wang P, He J, Sun Y, Reynolds M, Zhang L, Han S, Liang S, Sui H, Lin Y. Display of fungal hydrophobin on the Pichia pastoris cell surface and its influence on Candida antarctica lipase B. Appl Microbiol Biotechnol 2016; 100:5883-95. [PMID: 26969039 DOI: 10.1007/s00253-016-7431-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 01/31/2016] [Accepted: 02/29/2016] [Indexed: 11/28/2022]
Abstract
To modify the Pichia pastoris cell surface, two classes of hydrophobins, SC3 from Schizophyllum commune and HFBI from Trichoderma reesei, were separately displayed on the cell wall. There was an observable increase in the hydrophobicity of recombinant strains. Candida antarctica lipase B (CALB) was then co-displayed on the modified cells, generating strains GS115/SC3-61/CALB-51 and GS115/HFBI-61/CALB-51. Interestingly, the hydrolytic and synthetic activities of strain GS115/HFBI-61/CALB-51 increased by 37 and 109 %, respectively, but decreased by 26 and 43 %, respectively, in strain GS115/SC3-61/CALB-51 compared with the hydrophobin-minus recombinant strain GS115/CALB-GCW51. The amount of glycerol by-product from the transesterification reaction adsorbed on the cell surface was significantly decreased following hydrophobin modification, removing the glycerol barrier and allowing substrates to access the active sites of lipases. Electron micrographs indicated that the cell wall structures of both recombinant strains appeared altered, including changes to the inner glucan layer and outer mannan layer. These results suggest that the display of hydrophobins can change the surface structure and hydrophobic properties of P. pastoris and affect the catalytic activities of CALB displayed on the surface of P. pastoris cells.
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Affiliation(s)
- Pan Wang
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Jie He
- Wadsworth Center, New York State Department of Health, Albany, NY, 12201, USA
| | - Yufei Sun
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou, 510006, People's Republic of China.,Department of Biological and Chemical Engineering, Guangxi University of Technology, Donghuan Rd., Liuzhou, 545006, People's Republic of China
| | - Matthew Reynolds
- Wadsworth Center, New York State Department of Health, Albany, NY, 12201, USA
| | - Li Zhang
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Shuangyan Han
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Shuli Liang
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Haixin Sui
- Wadsworth Center, New York State Department of Health, Albany, NY, 12201, USA.,Department of Biomedical Sciences, School of Public Health, University at Albany, Albany, NY, 12201, USA
| | - Ying Lin
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou, 510006, People's Republic of China.
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22
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Zhuang S, Fu J, Powell C, Huang J, Xia Y, Yan R. Production of medium-chain volatile flavour esters in Pichia pastoris whole-cell biocatalysts with extracellular expression of Saccharomyces cerevisiae acyl-CoA:ethanol O-acyltransferase Eht1 or Eeb1. SPRINGERPLUS 2015; 4:467. [PMID: 26357598 PMCID: PMC4556718 DOI: 10.1186/s40064-015-1195-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Accepted: 07/29/2015] [Indexed: 11/10/2022]
Abstract
Medium-chain volatile flavour esters are important molecules since they have extensive applications in food, fragrance, cosmetic, paint and coating industries, which determine different characteristics of aroma or taste in commercial products. Biosynthesis of these compounds by alcoholysis is catalyzed by acyl-CoA:ethanol O-acyltransferases Eht1 or Eeb1 in Saccharomyces cerevisiae. In this study, these two yeast enzymes were selected to explore their preparations as the form of whole cell biocatalysts for the production of volatile flavour esters. Here, the novel whole cell biocatalysts Pichia pastoris yeasts with functional extracellular expression of Eht1 or Eeb1 were constructed. Flavour production was established through an integrated process with coupled enzyme formation and ester biosynthesis in the recombinant yeasts in one pot, leading to the formation of volatile C6–C14 methyl and ethyl esters from wort medium. Interestingly, there is no significant difference between P. pastoris-EHT1 and P. pastoris-EEB1 in substrate preference during flavour biosynthesis, indicating a similar role of Eht1 and Eeb1 in P. pastoris cells, in contradiction with previous findings in S. cerevisiae to some extent. Consequently the study not only provides a greater understanding of these two enzymes in a heterogeneous host, but also demonstrated the positive effect of the recombinant Eht1 and Eeb1 in ester formation by P. pastoris live cells, potentially paving the way towards achieving efficient production of volatile flavour by an integrated biocatalytic system composed of recombinant enzyme production and flavour biosynthesis.
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Affiliation(s)
- Shiwen Zhuang
- School of Life Sciences, Tianjin University, Tianjin, China.,National Food Institute, Technical University of Denmark, 2800 Kg. Lyngby, Denmark
| | - Junshu Fu
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Chris Powell
- Division of Food Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Nottinghamshire, UK
| | - Jinhai Huang
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Yihe Xia
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Ruixiang Yan
- School of Life Sciences, Tianjin University, Tianjin, China
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Borrelli GM, Trono D. Recombinant Lipases and Phospholipases and Their Use as Biocatalysts for Industrial Applications. Int J Mol Sci 2015; 16:20774-840. [PMID: 26340621 PMCID: PMC4613230 DOI: 10.3390/ijms160920774] [Citation(s) in RCA: 195] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 07/17/2015] [Accepted: 08/11/2015] [Indexed: 11/29/2022] Open
Abstract
Lipases and phospholipases are interfacial enzymes that hydrolyze hydrophobic ester linkages of triacylglycerols and phospholipids, respectively. In addition to their role as esterases, these enzymes catalyze a plethora of other reactions; indeed, lipases also catalyze esterification, transesterification and interesterification reactions, and phospholipases also show acyltransferase, transacylase and transphosphatidylation activities. Thus, lipases and phospholipases represent versatile biocatalysts that are widely used in various industrial applications, such as for biodiesels, food, nutraceuticals, oil degumming and detergents; minor applications also include bioremediation, agriculture, cosmetics, leather and paper industries. These enzymes are ubiquitous in most living organisms, across animals, plants, yeasts, fungi and bacteria. For their greater availability and their ease of production, microbial lipases and phospholipases are preferred to those derived from animals and plants. Nevertheless, traditional purification strategies from microbe cultures have a number of disadvantages, which include non-reproducibility and low yields. Moreover, native microbial enzymes are not always suitable for biocatalytic processes. The development of molecular techniques for the production of recombinant heterologous proteins in a host system has overcome these constraints, as this allows high-level protein expression and production of new redesigned enzymes with improved catalytic properties. These can meet the requirements of specific industrial process better than the native enzymes. The purpose of this review is to give an overview of the structural and functional features of lipases and phospholipases, to describe the recent advances in optimization of the production of recombinant lipases and phospholipases, and to summarize the information available relating to their major applications in industrial processes.
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Affiliation(s)
- Grazia M Borrelli
- Consiglio per la Ricerca in Agricoltura e l'Analisi dell'Economia Agraria, Centro di Ricerca per la Cerealicoltura, S.S. 673 Km 25, 200-71122 Foggia, Italy.
| | - Daniela Trono
- Consiglio per la Ricerca in Agricoltura e l'Analisi dell'Economia Agraria, Centro di Ricerca per la Cerealicoltura, S.S. 673 Km 25, 200-71122 Foggia, Italy.
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Guo D, Xu Y, Kang Y, Han S, Zheng S. Synthesis of octyl-β-D-glucopyranoside catalyzed by Thai rosewood β-glucosidase-displaying Pichia pastoris in an aqueous/organic two-phase system. Enzyme Microb Technol 2015; 85:90-7. [PMID: 26920486 DOI: 10.1016/j.enzmictec.2015.07.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 07/15/2015] [Accepted: 07/23/2015] [Indexed: 11/19/2022]
Abstract
We explored the ability of a Thai rosewood β-glucosidase-displaying P. pastoris whole-cell biocatalyst (Pp-DCBGL) system to synthesize alkyl β-D-glucosides. The primary investigation centered on the synthesis of octyl-β-D-glucopyranoside (octyl-glu, OG). OG could be synthesized through reverse hydrolysis reaction with very low efficiency. Then, OG was synthesized between BG and octanol by a transglycosylation reaction. In a 2-ml reaction system, OG was synthesized with a conversion rate of 51.1% in 3h when 5 mg/ml BG was utilized as the glucosyl donor under optimized conditions. And, even after being reused four times, the Pp-DCBGL was relatively stable. Additionally, a 500-ml-scale reaction system was conducted in a 2-L stirred reactor with a conversion rate of 47.5% in 1.5 h. Moreover, the conversion rate did not decrease after the whole-cell catalyst was reused two times. In conclusion, Pp-DCBGL has high reaction efficiency and operational stability, which is a powerful biocatalyst available for industrial synthesis.
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Affiliation(s)
- DongHeng Guo
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
| | - YanShan Xu
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
| | - YaJun Kang
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China
| | - ShuangYan Han
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China.
| | - SuiPing Zheng
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, China.
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Ananphongmanee V, Srisala J, Sritunyalucksana K, Boonchird C. Yeast Surface Display of Two Proteins Previously Shown to Be Protective Against White Spot Syndrome Virus (WSSV) in Shrimp. PLoS One 2015; 10:e0128764. [PMID: 26083446 PMCID: PMC4471349 DOI: 10.1371/journal.pone.0128764] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Accepted: 05/01/2015] [Indexed: 12/11/2022] Open
Abstract
Cell surface display using the yeasts Saccharomyces cerevisiae and Pichia pastoris has been extensively developed for application in bioindustrial processes. Due to the rigid structure of their cell walls, a number of proteins have been successfully displayed on their cell surfaces. It was previously reported that the viral binding protein Rab7 from the giant tiger shrimp Penaeus monodon (PmRab7) and its binding partner envelope protein VP28 of white spot syndrome virus (WSSV) could independently protect shrimp against WSSV infection. Thus, we aimed to display these two proteins independently on the cell surfaces of 2 yeast clones with the ultimate goal of using a mixture of the two clones as an orally deliverable, antiviral agent to protect shrimp against WSSV infection. PmRab7 and VP28 were modified by N-terminal tagging to the C-terminal half of S. cerevisiae α-agglutinin. DNA fragments, harboring fused-gene expression cassettes under control of an alcohol oxidase I (AOX1) promoter were constructed and used to transform the yeast cells. Immunofluorescence microscopy with antibodies specific to both proteins demonstrated that mutated PmRab7 (mPmRab7) and partial VP28 (pVP28) were localized on the cell surfaces of the respective clones, and fluorescence intensity for each was significantly higher than that of control cells by flow cytometry. Enzyme-linked immunosorbant assay (ELISA) using cells displaying mPmRab7 or pVP28 revealed that the binding of specific antibodies for each was dose-dependent, and could be saturated. In addition, the binding of mPmRab7-expressing cells with free VP28, and vice versa was dose dependent. Binding between the two surface-expressed proteins was confirmed by an assay showing agglutination between cells expressing complementary mPmRab7 and pVP28. In summary, our genetically engineered P. pastoris can display biologically active mPmRab7 and pVP28 and is now ready for evaluation of efficacy in protecting shrimp against WSSV by oral administration.
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Affiliation(s)
| | - Jiraporn Srisala
- Shrimp-Virus Interaction Laboratory (ASVI), National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Bangkok, Thailand
- Center of Excellence for Shrimp Molecular Biology and Biotechnology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Kallaya Sritunyalucksana
- Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok, Thailand
- Shrimp-Virus Interaction Laboratory (ASVI), National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), Bangkok, Thailand
- Center of Excellence for Shrimp Molecular Biology and Biotechnology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Chuenchit Boonchird
- Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok, Thailand
- * E-mail:
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Smith MR, Khera E, Wen F. Engineering Novel and Improved Biocatalysts by Cell Surface Display. Ind Eng Chem Res 2015; 54:4021-4032. [PMID: 29056821 PMCID: PMC5647830 DOI: 10.1021/ie504071f] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Biocatalysts, especially enzymes, have the ability to catalyze reactions with high product selectivity, utilize a broad range of substrates, and maintain activity at low temperature and pressure. Therefore, they represent a renewable, environmentally friendly alternative to conventional catalysts. Most current industrial-scale chemical production processes using biocatalysts employ soluble enzymes or whole cells expressing intracellular enzymes. Cell surface display systems differ by presenting heterologous enzymes extracellularly, overcoming some of the limitations associated with enzyme purification and substrate transport. Additionally, coupled with directed evolution, cell surface display is a powerful platform for engineering enzymes with enhanced properties. In this review, we will introduce the molecular and cellular principles of cell surface display and discuss how it has been applied to engineer enzymes with improved properties as well as to develop surface-engineered microbes as whole-cell biocatalysts.
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Affiliation(s)
- Mason R. Smith
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Eshita Khera
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Fei Wen
- Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States
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Guo D, Jin Z, Xu Y, Wang P, Lin Y, Han S, Zheng S. Scaling-up the synthesis of myristate glucose ester catalyzed by a CALB-displaying Pichia pastoris whole-cell biocatalyst. Enzyme Microb Technol 2015; 75-76:30-6. [PMID: 26047913 DOI: 10.1016/j.enzmictec.2015.04.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 04/08/2015] [Accepted: 04/08/2015] [Indexed: 10/23/2022]
Abstract
The novel whole-cell biocatalyst Candida antarctica lipase B displaying-Pichia pastoris (Pp-CALB) is characterized by its low preparation cost and could be an alternative to the commercial immobilized Candida antarctica lipase B (CALB). This study addresses the feasibility of using Pp-CALB in large scale glucose fatty acid esters production. 1,2-O-Isopropylidene-α-D-glucofuranose (IpGlc) was used as the acyl acceptor to overcome the low solubility of glucose in an organic solvent and to avoid the addition of toxic co-solvents. IpGlc significantly improved the Pp-CALB catalyzing esterification efficiency when using long chain fatty acids as the acyl donor. Under the preferred operating conditions (50 °C, 40 g/L molecular sieve dosage and 200 rpm mixing intensity), 60.5% of IpGlc converted to 6-O-myristate-1, 2-O-isopropylidene-α-D-glucofuranose (C14-IpGlc) after a 96-h reaction in a 2-L stirred reactor. In a 5-L pilot scale test, Pp-CALB also showed a similar substrate conversion rate of 55.4% and excellent operational stability. After C14-IpGlc was collected, 70% trifluoroacetic acid was adopted to hydrolyze C14-IpGlc to myristate glucose ester (C14-Glc) with a high yield of 95.3%. In conclusion, Pp-CALB is a powerful biocatalyst available for industrial synthesis, and this study describes an applicable and economical process for the large scale production of myristate glucose ester.
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Affiliation(s)
- DongHeng Guo
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, PR China
| | - Zi Jin
- Pharmacy School, Wenzhou Medical University, Wenzhou 325035, PR China
| | - YanShan Xu
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, PR China
| | - Ping Wang
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, PR China
| | - Ying Lin
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, PR China
| | - ShuangYan Han
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, PR China.
| | - SuiPing Zheng
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, PR China.
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Ben Akacha N, Gargouri M. Microbial and enzymatic technologies used for the production of natural aroma compounds: Synthesis, recovery modeling, and bioprocesses. FOOD AND BIOPRODUCTS PROCESSING 2015. [DOI: 10.1016/j.fbp.2014.09.011] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Eby JM, Peretti SW. Performance in synthetic applications of a yeast surface display-based biocatalyst. RSC Adv 2015. [DOI: 10.1039/c5ra04039f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Organic synthesis with surface-displayed lipase: alkyl esters of fatty acids. Compared performance to commercial preparations. Catalyst is reusable and stable up to 50–60 °C. Kinetics of surface-displayed synthesis of butyl decanoate.
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Affiliation(s)
- J. M. Eby
- North Carolina State University
- Department of Chemical and Biomolecular Engineering
- Raleigh
- USA
| | - S. W. Peretti
- North Carolina State University
- Department of Chemical and Biomolecular Engineering
- Raleigh
- USA
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Eby JM, Peretti SW. Characterization, performance, and applications of a yeast surface display-based biocatalyst. RSC Adv 2015. [DOI: 10.1039/c4ra16304d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Yeast surface display (YSD) of two lipases. Measured expression level and copy number. Synthetic and hydrolytic activity comparable to commercial lipase. Cost analysis of YSD system vs. commercial formulations.
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Affiliation(s)
- J. M. Eby
- North Carolina State University
- Department of Chemical and Biomolecular Engineering
- Raleigh
- USA
| | - S. W. Peretti
- North Carolina State University
- Department of Chemical and Biomolecular Engineering
- Raleigh
- USA
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Yadav GD, Pawar SV. Novelty of immobilized enzymatic synthesis of 3-ethyl-1,3-oxazolidin-2-one using 2-aminoalcohol and dimethyl carbonate: Mechanism and kinetic modeling of consecutive reactions. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcatb.2014.08.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Displaying Candida antarctica lipase B on the cell surface of Aspergillus niger as a potential food-grade whole-cell catalyst. ACTA ACUST UNITED AC 2014; 41:711-20. [DOI: 10.1007/s10295-014-1410-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 01/23/2014] [Indexed: 12/20/2022]
Abstract
Abstract
Aspergillus niger is a recognized workhorse used to produce food processing enzymes because of its extraordinarily high protein-producing capacity. We have developed a new cell surface display system de novo in A. niger using expression elements from generally recognized as safe certified microorganisms. Candida antarctica lipase B (CALB), a widely used hydrolase, was fused to an endogenous cell wall mannoprotein, CwpA, and functionally displayed on the cell surface. Localization of CALB was confirmed by enzymatic assay and immunofluorescence analysis using laser scanning confocal microscopy. After induction by maltose for 45 h, the hydrolytic activity and synthesis activity of A. niger mycelium-surface displayed CALB (AN-CALB) reached 400 and 240 U/g dry cell, respectively. AN-CALB was successfully used as a whole-cell catalyst for the enzymatic production of ethyl esters from a series of fatty acids of different chain lengths and ethanol. In a solvent-free system, AN-CALB showed great synthetic activity and afforded high substrate mole conversions, which amounted to 87 % for ethyl hexanoate after 2 h, 89 % for ethyl laurate after 2 h, and 84 % for ethyl stearate after 3 h. These results suggested that CwpA can act as an efficient anchoring motif for displaying enzyme on A. niger, and AN-CALB is a robust, green, and cost-effective alternative food-grade whole-cell catalyst to commercial lipase.
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Jin Z, Zhang K, Zhang L, Zheng SP, Han SY, Lin Y. Quantification analysis of yeast-displayed lipase. Anal Biochem 2014; 450:46-8. [DOI: 10.1016/j.ab.2013.12.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2013] [Revised: 12/24/2013] [Accepted: 12/27/2013] [Indexed: 10/25/2022]
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Brault G, Shareck F, Hurtubise Y, Lépine F, Doucet N. Short-chain flavor ester synthesis in organic media by an E. coli whole-cell biocatalyst expressing a newly characterized heterologous lipase. PLoS One 2014; 9:e91872. [PMID: 24670408 PMCID: PMC3966760 DOI: 10.1371/journal.pone.0091872] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Accepted: 02/16/2014] [Indexed: 11/18/2022] Open
Abstract
Short-chain aliphatic esters are small volatile molecules that produce fruity and pleasant aromas and flavors. Most of these esters are artificially produced or extracted from natural sources at high cost. It is, however, possible to 'naturally' produce these molecules using biocatalysts such as lipases and esterases. A gene coding for a newly uncovered lipase was isolated from a previous metagenomic study and cloned into E. coli BL21 (DE3) for overexpression using the pET16b plasmid. Using this recombinant strain as a whole-cell biocatalyst, short chain esters were efficiently synthesized by transesterification and esterification reactions in organic media. The recombinant lipase (LipIAF5-2) showed good affinity toward glyceryl trioctanoate and the highest conversion yields were obtained for the transesterification of glyceryl triacetate with methanol. Using a simple cetyl-trimethylammonium bromide pretreatment increased the synthetic activity by a six-fold factor and the whole-cell biocatalyst showed the highest activity at 40°C with a relatively high water content of 10% (w/w). The whole-cell biocatalyst showed excellent tolerance to alcohol and short-chain fatty acid denaturation. Substrate affinity was equally effective with all primary alcohols tested as acyl acceptors, with a slight preference for methanol. The best transesterification conversion of 50 mmol glyceryl triacetate into isoamyl acetate (banana fragrance) provided near 100% yield after 24 hours using 10% biocatalyst loading (w/w) in a fluidized bed reactor, allowing recycling of the biocatalyst up to five times. These results show promising potential for an industrial approach aimed at the biosynthesis of short-chain esters, namely for natural flavor and fragrance production in micro-aqueous media.
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Affiliation(s)
- Guillaume Brault
- INRS-Institut Armand-Frappier, Université du Québec, Laval, Québec, Canada
| | - François Shareck
- INRS-Institut Armand-Frappier, Université du Québec, Laval, Québec, Canada
| | - Yves Hurtubise
- Innu-Science Canada, Inc., Local 119, Trois-Rivières, Québec, Canada
| | - François Lépine
- INRS-Institut Armand-Frappier, Université du Québec, Laval, Québec, Canada
| | - Nicolas Doucet
- INRS-Institut Armand-Frappier, Université du Québec, Laval, Québec, Canada
- PROTEO, the Québec Network for Research on Protein Function, Structure, and Engineering, Québec, Canada
- GRASP, Groupe de Recherche Axé sur la Structure des Protéines, Québec, Canada
- * E-mail:
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Hu X, Chu J, Zhang S, Zhuang Y. Comparative performance of S-adenosyl-L-methionine biosynthesis and degradation in Pichia pastoris using different promoters and novel consumption inhibitors. Enzyme Microb Technol 2013; 55:94-9. [PMID: 24411450 DOI: 10.1016/j.enzmictec.2013.09.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 08/07/2013] [Accepted: 09/07/2013] [Indexed: 10/26/2022]
Abstract
The yeast Pichia pastoris is a widely used host for recombinant protein expression, and has recently been engineered for whole-cell biocatalysis. The inducible P(AOX) and constitutive P(GAP) promoters are commonly employed. In this study, the S-adenosyl-L-methionine (SAM) biosynthesis and degradation efficiency of two P. pastoris strains were compared, and novel inhibitors that suppress SAM degradation were characterized. The strains exhibited clear physiological differences. P(GAP)-Pichia showed higher transcription and activity of SAM synthetase, and the rapid cell growth led to higher levels of spermidine synthesis from SAM. In contrast, P(AOX)-Pichia synthesized higher levels of glutathione from SAM, and this strain responded to hydrogen peroxide formation during methanol utilization. Aristeromycin proved an efficient inhibitor of SAM degradation in P(AOX)-Pichia; 0.02 mg/L led to a 36.36% reduction in the ratio of glutathionine:SAM, and SAM accumulation was enhanced by 7.74% to 11.83 g/L. Ethanol was an even more efficient inhibitor of SAM consumption in P(GAP)-Pichia; 8 g/L resulted in a 73.68% decrease in the ratio of SPD:SAM, and SAM production was elevated by 54.55% to 0.17 g/L/h.
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Affiliation(s)
- Xiaoqing Hu
- Key Laboratory of Industrial Biotechnology of Ministry of Education, and State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Ju Chu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Siliang Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Yingping Zhuang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
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Synthesisof fructose laurate esters catalyzed by a CALB-displaying Pichia pastoris whole-cell biocatalyst in a non-aqueous system. BIOTECHNOL BIOPROC E 2013. [DOI: 10.1007/s12257-012-0511-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Jin Z, Han SY, Zhang L, Zheng SP, Wang Y, Lin Y. Combined utilization of lipase-displaying Pichia pastoris whole-cell biocatalysts to improve biodiesel production in co-solvent media. BIORESOURCE TECHNOLOGY 2013; 130:102-109. [PMID: 23306117 DOI: 10.1016/j.biortech.2012.12.020] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2012] [Revised: 11/30/2012] [Accepted: 12/05/2012] [Indexed: 06/01/2023]
Abstract
Lipase-displaying whole cells appear to be efficient biocatalysts because of their low preparation costs and simple recycling procedure. The combined utilization of Candida antarctica lipase B (CALB) and Rhizomucor miehei lipase (RML), separately displayed on Pichia pastoris whole cells, to produce biodiesel in co-solvent media was investigated. A response surface methodology incorporating a D-optimal design was employed to obtain the optimum reaction conditions for methyl ester (ME) synthesis. The synergistic effect of the two displayed lipases and the use of tert-butanol and isooctane as the co-solvent media were found to significantly improve the transesterification reaction. Scaled-up reactions using various types of feedstock were carried out in a 0.5-l stirred reactor under optimum conditions, affording ME yields over 90% in 12h. Moreover, the ME yields remained above 85% after 20 repeated batch cycles. In conclusion, this biocatalyst affords a promising route to efficient biodiesel production.
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Affiliation(s)
- Zi Jin
- Guangdong Key Laboratory of Fermentation and Enzyme Engineering, School of Bioscience and Bioengineering, South China University of Technology, Guangzhou 510006, PR China
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Quantitative evaluation of Candia antarctica lipase B displayed on the cell surface of a Pichia pastoris based on an FS anchor system. Biotechnol Lett 2012; 35:367-74. [DOI: 10.1007/s10529-012-1085-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2012] [Accepted: 11/01/2012] [Indexed: 10/27/2022]
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