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Li Z, Fang Y, Yang J, Chen H, Yang B, Wang Y. A green and efficient two-step enzymatic esterification-hydrolysis method for enrichment of c9,t11-CLA isomer based on a three-liquid-phase system. RSC Adv 2023; 13:26690-26699. [PMID: 37681044 PMCID: PMC10481123 DOI: 10.1039/d3ra02054a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 08/29/2023] [Indexed: 09/09/2023] Open
Abstract
A novel two-step enzymatic esterification-hydrolysis method that generates high-purity conjugated linoleic acid (CLA) isomers was developed. CLA was first partially purified by enzymatic esterification and then further purified by efficient, selective enzymatic hydrolysis in a three-liquid-phase system (TLPS). Compared with traditional two-step selective enzymatic esterification, this novel method produced highly pure cis-9, trans-11 (c9,t11)-CLA (96%) with high conversion (approx. 36%) and avoided complicated rehydrolysis and reesterification steps. The catalytic efficiency and selectivity of CLA ester enzymatic hydrolysis was greatly improved with TLPSs, as high-speed stirring provided a larger interface area for the reaction and product inhibition was effectively reduced by extraction of the product into other phases. Furthermore, the enzyme-enriched phase (liquid immobilization support) was effectively and economically reused more than 8 times because it contained more than 90% of the concentrated enzyme. Therefore, this novel enzymatic esterification-hydrolysis method can be considered ideal to produce high-purity fatty acid monomers.
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Affiliation(s)
- Zhigang Li
- School of Biology and Biological Engineering, South China University of Technology Guangzhou 510006 China
- Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology Guangzhou 510006 China
| | - Yinglin Fang
- School of Biology and Biological Engineering, South China University of Technology Guangzhou 510006 China
| | - Jiawei Yang
- School of Biology and Biological Engineering, South China University of Technology Guangzhou 510006 China
| | - Huayong Chen
- School of Biology and Biological Engineering, South China University of Technology Guangzhou 510006 China
| | - Bo Yang
- School of Biology and Biological Engineering, South China University of Technology Guangzhou 510006 China
| | - Yonghua Wang
- School of Food Science and Engineering, South China University of Technology Guangzhou 510641 China
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Li Z, Yang Z, Chen H, Chen H, Yang B, Wang Y. A highly efficient and recoverable enzymatic method for removing phospholipids from soybean oil via an ionic liquid-based three-liquid-phase. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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3
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Zhang H, Smith E, Zhang W, Zhou A. Inkjet printed microfluidic paper-based analytical device (μPAD) for glucose colorimetric detection in artificial urine. Biomed Microdevices 2019; 21:48. [DOI: 10.1007/s10544-019-0388-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Wu L, Rathi B, Chen Y, Wu X, Liu H, Li J, Ming A, Han G. Characterization of immobilized tyrosinase - an enzyme that is stable in organic solvent at 100 °C. RSC Adv 2018; 8:39529-39535. [PMID: 35558031 PMCID: PMC9090894 DOI: 10.1039/c8ra07559j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 11/02/2018] [Indexed: 12/16/2022] Open
Abstract
Tyrosinase is a copper-containing enzyme present in plant and animal tissues, which catalyzes the production of melanin and other pigments. In organic solvent, tyrosinase can convert N-acetyl-l-tyrosine ethyl ester (insoluble in aqueous) to a derivative of l-dopamine (a drug used for the treatment of Parkinson's disease). Thus, the performances of tyrosinase in organic solvent have attracted scientific attention since 1980. In this work, we investigated the stability of immobilized tyrosinase at high temperature in anhydrous organic solvent. Triethylaminoethyl cellulose (TEAE-Cellulose) performed the best out of six immobilization platforms. The dry immobilized tyrosinase became extremely thermostable in organic solvent, and the half-life of the dry immobilized tyrosinase in organic solvent is strongly related to the polarity of the organic solvent than their log P value. The immobilized tyrosinase loses its activity instantaneously in aqueous solution at 100 °C, but it keeps enzymatic activity within 10 min in hydrophilic methanol and over one month in hydrophobic hexane (log P: 4.66, non-polar) even incubating at 100 °C. This research provides valuable information for the design of new biocatalysts. Immobilized tyrosinase in hexane can withstand 100 °C over one week, and the half-life of the dry immobilized tyrosinase in organic solvent is strongly related to the polarity of the organic solvent.![]()
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Affiliation(s)
- Lidong Wu
- Key Laboratory of Control of Quality and Safety for Aquatic Products, Ministry of Agriculture, Chinese Academy of Fishery Sciences Beijing 100141 China.,Department of Chemistry, Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA +16172533556
| | - Brijesh Rathi
- Department of Chemistry, Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA +16172533556.,Laboratory for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College University of Delhi Delhi 110007 India
| | - Yi Chen
- Department of Chemistry, Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA +16172533556
| | - Xiuhong Wu
- Department of Chemistry, Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA +16172533556
| | - Huan Liu
- Key Laboratory of Control of Quality and Safety for Aquatic Products, Ministry of Agriculture, Chinese Academy of Fishery Sciences Beijing 100141 China
| | - Jincheng Li
- Key Laboratory of Control of Quality and Safety for Aquatic Products, Ministry of Agriculture, Chinese Academy of Fishery Sciences Beijing 100141 China
| | - Anjie Ming
- Smart Sensing R&D Center, Institute of Microelectronics, Chinese Academy of Science Beijing 100029 China
| | - Gang Han
- Key Laboratory of Control of Quality and Safety for Aquatic Products, Ministry of Agriculture, Chinese Academy of Fishery Sciences Beijing 100141 China
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Talukder MMR, Shiong SCS. Stabilization of Chromobacterium viscosum Lipase (CVL) Against Ultrasound Inactivation by the Pretreatment with Polyethylene Glycol (PEG). Appl Biochem Biotechnol 2015; 177:1742-52. [PMID: 26373941 DOI: 10.1007/s12010-015-1850-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 09/09/2015] [Indexed: 11/30/2022]
Abstract
Although ultrasound has been used to accelerate many enzymatic reactions, the low stability of enzymes in such a system still remains a critical issue, limiting its industrial application. Here, we have reported that polyethylene glycol (PEG) pretreatment stabilized Chromobacterium viscosum lipase (CVL) in ultrasound-assisted water-isooctane emulsion. PEGs of different molecular weights and concentrations were used to pretreat CVL, and the pretreated lipase activities for olive oil hydrolysis were investigated at different ultrasonic powers. The best result was attained with PEG400 at 100 mg/ml for a lipase concentration of 0.02 mg/ml and an ultrasonic power of 106 W. The half-life time of PEG400-treated lipase at 106 W was 54 min, a 27-fold higher than that attained using untreated lipase. Circular dichroism (CD) spectra suggested that PEG increased the rigidity of CVL structure, which favored the lipase stability against ultrasound inactivation. These results have important implications for the exploitation of ultrasound in biocatalytic process.
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Affiliation(s)
- Md Mahabubur Rahman Talukder
- Institute of Chemical and Engineering Sciences, Singapore, Singapore. .,Department of Industrial Biotechnology, Institute of Chemical and Engineering Sciences, 1 Pesek Road, Jurong Island, Singapore, 627833, Singapore.
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Three New Cutinases from the Yeast Arxula adeninivorans That Are Suitable for Biotechnological Applications. Appl Environ Microbiol 2015; 81:5497-510. [PMID: 26048925 DOI: 10.1128/aem.00894-15] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Accepted: 05/29/2015] [Indexed: 02/06/2023] Open
Abstract
The genes ACUT1, ACUT2, and ACUT3, encoding cutinases, were selected from the genomic DNA of Arxula adeninivorans LS3. The alignment of the amino acid sequences of these cutinases with those of other cutinases or cutinase-like enzymes from different fungi showed that they all had a catalytic S-D-H triad with a conserved G-Y-S-Q-G domain. All three genes were overexpressed in A. adeninivorans using the strong constitutive TEF1 promoter. Recombinant 6× His (6h)-tagged cutinase 1 protein (p) from A. adeninivorans LS3 (Acut1-6hp), Acut2-6hp, and Acut3-6hp were produced and purified by immobilized-metal ion affinity chromatography and biochemically characterized using p-nitrophenyl butyrate as the substrate for standard activity tests. All three enzymes from A. adeninivorans were active from pH 4.5 to 6.5 and from 20 to 30°C. They were shown to be unstable under optimal reaction conditions but could be stabilized using organic solvents, such as polyethylene glycol 200 (PEG 200), isopropanol, ethanol, or acetone. PEG 200 (50%, vol/vol) was found to be the best stabilizing agent for all of the cutinases, and acetone greatly increased the half-life and enzyme activity (up to 300% for Acut3-6hp). The substrate spectra for Acut1-6hp, Acut2-6hp, and Acut3-6hp were quite similar, with the highest activity being for short-chain fatty acid esters of p-nitrophenol and glycerol. Additionally, they were found to have polycaprolactone degradation activity and cutinolytic activity against cutin from apple peel. The activity was compared with that of the 6× His-tagged cutinase from Fusarium solani f. sp. pisi (FsCut-6hp), also expressed in A. adeninivorans, as a positive control. A fed-batch cultivation of the best Acut2-6hp-producing strain, A. adeninivorans G1212/YRC102-ACUT2-6H, was performed and showed that very high activities of 1,064 U ml(-1) could be achieved even with a nonoptimized cultivation procedure.
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Peng X, Yuan XZ, Liu H, Zeng GM, Chen XH. Degradation of Polycyclic Aromatic Hydrocarbons (PAHs) by Laccase in Rhamnolipid Reversed Micellar System. Appl Biochem Biotechnol 2015; 176:45-55. [PMID: 25637508 DOI: 10.1007/s12010-015-1508-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Accepted: 01/21/2015] [Indexed: 12/01/2022]
Abstract
Rhamnolipid was applied to degrade anthracene and pyrene in reversed micelles. The parameters in degradation were optimized for the purpose of improving degradation rates. The proper amount of rhamnolipid (RL) used for degrading anthracene was 0.065 mM, while 0.075 mM for pyrene. However, reaction time for degrading both anthracene and pyrene was 48 h. The optimum water content, pH, laccase concentration, polycyclic aromatic hydrocarbon (PAH) initial concentration, and volume ratio of n-hexanol to isooctane for both were found out. The highest degradation rates of anthracene and pyrene were 37.52 and 25.58%, respectively. Although the degradation rates were not higher than the results previous literatures reported, this method was of novelty and provided guidance in application in degrading PAHs by reversed micellar system, especially for biosurfactant-based reversed micelles.
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Affiliation(s)
- Xin Peng
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China,
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8
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A Review of the Role of Amphiphiles in Biomass to Ethanol Conversion. APPLIED SCIENCES-BASEL 2013. [DOI: 10.3390/app3020396] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Eckard AD, Muthukumarappan K, Gibbons W. Enzyme recycling in a simultaneous and separate saccharification and fermentation of corn stover: a comparison between the effect of polymeric micelles of surfactants and polypeptides. BIORESOURCE TECHNOLOGY 2013; 132:202-209. [PMID: 23411449 DOI: 10.1016/j.biortech.2013.01.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Revised: 12/30/2012] [Accepted: 01/04/2013] [Indexed: 06/01/2023]
Abstract
The efficacy of enzyme recycling in simultaneous (SSF) and separate (SHF) saccharification and fermentation of corn stover was evaluated with the use of novel enzyme stabilizers of casein, Tween20 and polymeric micelles (PMs) of polyethylene glycol (PEG)-casein and PEG-Tween20. Amphiphiles were added to maximize the percentage of enzyme remaining in fermented liquor that could be recycled twice back into the process. With no additive, in SHF the ethanol yield was declined by 64.0% and 80.0% after the first and second recycling, respectively. Application of PMs of PEG-casein in one cycle of SHF significantly improved the theoretical ethanol yield from 0.49 ± 0.00 to 0.91 ± 0.00 g/g compared to when only casein (0.66 ± 0.00 g/g), Tween 20 (0.53 ± 0.00 g/g) and Tween 20-PEG (0.77 ± 0.08 g/g) were used. PMs of PEG-Tween and PEG-casein also improved enzyme recycling, such that the ethanol yield was improved by 50% and 108% beyond that obtained with Tween and casein, respectively.
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Affiliation(s)
- Anahita Dehkhoda Eckard
- Department of Agricultural and Biosystems Engineering, 1400 North Campus Drive, South Dakota State University, Brookings, SD 57007, USA.
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Analysis of casein biopolymers adsorption to lignocellulosic biomass as a potential cellulase stabilizer. J Biomed Biotechnol 2012; 2012:745181. [PMID: 23118515 PMCID: PMC3481958 DOI: 10.1155/2012/745181] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Accepted: 07/03/2012] [Indexed: 11/17/2022] Open
Abstract
Although lignocellulosic materials have a good potential to substitute current feedstocks used for ethanol production, conversion of these materials to fermentable sugars is still not economical through enzymatic hydrolysis. High cost of cellulase has prompted research to explore techniques that can prevent from enzyme deactivation. Colloidal proteins of casein can form monolayers on hydrophobic surfaces that alleviate the de-activation of protein of interest. Scanning electron microscope (SEM), fourier transform infrared spectroscopy (FT-IR), capillary electrophoresis (CE), and Kjeldahl and BSA protein assays were used to investigate the unknown mechanism of action of induced cellulase activity during hydrolysis of casein-treated biomass. Adsorption of casein to biomass was observed with all of the analytical techniques used and varied depending on the pretreatment techniques of biomass. FT-IR analysis of amides I and II suggested that the substructure of protein from casein or skim milk were deformed at the time of contact with biomass. With no additive, the majority of one of the cellulase mono-component, 97.1 ± 1.1, was adsorbed to CS within 24 h, this adsorption was irreversible and increased by 2% after 72 h. However, biomass treatment with skim-milk and casein reduced the adsorption to 32.9% ± 6.0 and 82.8% ± 6.0, respectively.
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Abstract
Propolis (bee glue) is a resinous, sticky, dark-colored material produced by honeybees. Propolis today, due to its medicinal properties, is increasingly popular and is extensively used in food, beverages, and cosmetic products. Besides its numerous positive properties, propolis may also have adverse effects, such as, principally, allergic eczematous contact dermatitis in apiarists and in consumers with an allergic predisposition. In this study, we found appropriate conditions for removing caffeate esters, which are the main allergenic components, from raw propolis. The proposed method consists of the resuspension of propolis in a food grade solvent, followed by a biotransformation based on the cinnamoyl esterase activity of Lactobacillus helveticus. We showed that the reduction of caffeate esters by L. helveticus did not affect the content of flavonoids, which are the main bioactive molecules of propolis. Furthermore, we verified that the biotransformation of propolis did not cause a loss of antimicrobial activity. Finally, we demonstrated that the ability of L. helveticus to hydrolyze caffeate esters in propolis is strain specific. In conclusion, the proposed strategy is simple, employs food grade materials, and is effective in selectively removing allergenic molecules without affecting the bioactive fraction of propolis. This is the first study demonstrating that the allergenic caffeate esters of propolis can be eliminated by means of a bacterial biotransformation procedure.
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Biasutti MA, Abuin EB, Silber JJ, Correa NM, Lissi EA. Kinetics of reactions catalyzed by enzymes in solutions of surfactants. Adv Colloid Interface Sci 2008; 136:1-24. [PMID: 17706582 DOI: 10.1016/j.cis.2007.07.001] [Citation(s) in RCA: 141] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2006] [Revised: 06/30/2007] [Accepted: 07/02/2007] [Indexed: 11/20/2022]
Abstract
The effect of surfactants, both in water-in-oil microemulsions (hydrated reverse micelles) and aqueous solutions upon enzymatic processes is reviewed, with special emphasis on the effect of the surfactant upon the kinetic parameters of the process. Differences and similarities between processes taking place in aqueous and organic solvents are highlighted, and the main models currently employed to interpret the results are briefly discussed.
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Talukder MMR, Zaman MM, Hayashi Y, Wu JC, Kawanishi T. Thermostability of Cromobacterium viscosum lipase in AOT/isooctane reverse micelle. Appl Biochem Biotechnol 2007; 141:77-84. [PMID: 17625267 DOI: 10.1007/s12010-007-9211-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2006] [Revised: 04/20/2006] [Accepted: 04/22/2006] [Indexed: 11/26/2022]
Abstract
The thermostability of Cromobacterium viscosum lipase (EC 3.1.1.3) entrapped in AOT (sodium bis-[2-ethylhexyl] sulfosuccinate) reverse micelles was increased by the addition of short-chain polyethylene glycol (PEG 400). Two different approaches were considered: (1) the determination of half-life time and (2) the mechanistic analysis of deactivation kinetics. The half-life of lipase entrapped in AOT/isooctane reverse micelles with PEG 400 at 60 degrees C was 28 h, ninefold higher than that in reverse micelles without PEG 400. The lipase entrapped in both reverse micellar systems followed a series-type deactivation mechanism involving two first-order steps. The deactivation constant for the first step at 60 degrees C in PEG containing reverse micelles was 0.055 h!1, 11-fold lower than that in reverse micelles without PEG, whereas it remained almost constant for the second step. The inactivation energy of the lipase entrapped in reverse micelles with and without PEG 400 was 88.12 and 21.97 kJ/mol, respectively.
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Affiliation(s)
- M M R Talukder
- Institute of Chemical and Engineering Sciences, Jurong Island, Singapore.
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Activity of acetone-treated Chromobacterium viscosum lipase in AOT reverse micelles in the presence of low molecular weight polyethylene glycol. Biochem Eng J 2006. [DOI: 10.1016/j.bej.2005.02.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Enhanced activity and stability of Chromobacterium viscosum lipase in AOT reverse micellar systems by pretreatment with acetone. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.molcatb.2004.11.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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