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Jonidi Shariatzadeh F, Logsetty S, Liu S. Ultrasensitive Nanofiber Biosensor: Rapid In Situ Chromatic Detection of Bacteria for Healthcare Innovation. ACS APPLIED BIO MATERIALS 2024; 7:2378-2388. [PMID: 38502803 DOI: 10.1021/acsabm.4c00038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Rapid detection of bacterial presence in skin wounds is crucial to prevent the transition from acute to chronic wounds and the onset of systemic infections. Current methods for detecting infections, particularly at low concentrations (<1.0 × 105 CFU/cm2), often require complex technologies and direct sampling, which can be invasive and time-consuming. Addressing this gap, we introduce a colorimetric nanofibrous biosensor enabling real-time in situ monitoring of bacterial concentrations in wounds. This biosensor employs a colorimetric hemicyanine dye (HCy) probe, which changes color in response to bacterial lipase, a common secretion in infected wounds. To enhance the biosensor's sensitivity, we incorporated two key materials science strategies: aligning the nanofibers to promote efficient bacterial attachment and localization and integrating Tween 80, a surfactant, within the nanofiber matrix. This combination of physical and chemical cues results in a notable increase in lipase activity. The cross-aligned core-shell nanofibers, embedded with Tween 80 and HCy, demonstrate an immediate and distinct color change when exposed to as low as 3.0 × 104 CFU/cm2 of common pathogens such as Pseudomonas aeruginosa and MRSA. Significantly, the presence of Tween 80 amplifies the colorimetric response, making visual detection more straightforward and four times more pronounced. Our nanobiosensor design facilitates the detection of low-concentration bacterial infections in situ without the need to remove wound dressings. This advancement marks a significant step forward in real-time wound monitoring, offering a practical tool for the early detection of clinical bacterial infections.
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Affiliation(s)
| | - Sarvesh Logsetty
- Departments of Surgery and Psychiatry, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba R3E 3P5, Canada
| | - Song Liu
- Biomedical Engineering, Faculty of Engineering, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
- Department of Biosystems Engineering, Faculty of Agricultural and Food Sciences, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
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2
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Umbelopsis (Mucoromycota) from Patagonia, Argentina: identification, phylogenetic analysis, and expression profiling of lipase activity and lipid accumulation in selected isolates. Mycol Prog 2023. [DOI: 10.1007/s11557-023-01866-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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3
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Deng Y, Wang X, Xu H, Liu C, Li R, Zhang Y, Qu C, Miao J. Optimization of κ-Selenocarrageenase Production by Pseudoalteromonas sp. Xi13 and Its Immobilization. Molecules 2022; 27:molecules27227716. [PMID: 36431814 PMCID: PMC9694495 DOI: 10.3390/molecules27227716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/31/2022] [Accepted: 10/31/2022] [Indexed: 11/12/2022] Open
Abstract
The bioenzymatic production of selenium oligosaccharides addresses the problems resulting from high molecular weight and poor water solubility of κ-selenocarrageenan, and lays foundation for its application as adjuvant drugs for cancer treatment and food additive. κ-selenocarrageenase extracted from Pseudoalteromonas sp. Xi13 can degrade κ-selenocarrageenan to selenium oligosaccharides. The maximum optimized κ-selenocarrageenase activity using Response Surface Methodology (RSM) was increased by 1.4 times, reaching 8.416 U/mL. To expand applications of the κ-selenocarrageenase in industry, the preparation conditions of it in either lyophilized or immobilized form were investigated. The activity recovery rate of the lyophilized enzyme was >70%, while that of the immobilized enzyme was 62.83%. However, the immobilized κ-selenocarrageenase exhibits good stability after being reused four times, with 58.28% of residual activity. The selenium content of κ-selenocarrageenan oligosaccharides degraded by the immobilized κ-selenocarrageenase was 47.06 µg/g, 8.3% higher than that degraded by the lyophilized enzyme. The results indicate that the immobilized κ-selenocarrageenase is suitable for industrial applications and has commercial potential.
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Affiliation(s)
- Yashan Deng
- Department of Pharmaceutical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Xixi Wang
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Hui Xu
- Department of Pharmaceutical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Cui Liu
- Department of Pharmaceutical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Ran Li
- Department of Pharmaceutical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Yuanyuan Zhang
- Department of Pharmaceutical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
- State Key Laboratory Base for Eco-Chemical Engineering in College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
- Correspondence: (J.M.); (Y.Z.); Tel.: +86-532-88967430 (J.M.); +86-532-13153275509 (Y.Z.)
| | - Changfeng Qu
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
- Marine Natural Products R&D Laboratory, Qingdao Key Laboratory, Qingdao 266061, China
| | - Jinlai Miao
- Key Laboratory of Marine Eco-Environmental Science and Technology, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
- Marine Natural Products R&D Laboratory, Qingdao Key Laboratory, Qingdao 266061, China
- Correspondence: (J.M.); (Y.Z.); Tel.: +86-532-88967430 (J.M.); +86-532-13153275509 (Y.Z.)
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Fu Q, Liu X, He D, Li X, Li C, Du M, Wang Y, Long S, Wang D. Rhamnolipid increases H 2S generation from waste activated sludge anaerobic fermentation: An overlooked concern. WATER RESEARCH 2022; 221:118742. [PMID: 35752095 DOI: 10.1016/j.watres.2022.118742] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 04/25/2022] [Accepted: 06/11/2022] [Indexed: 06/15/2023]
Abstract
Rhamnolipid (RL), one representative biosurfactant, is widely regarded as an economically feasible and environmentally beneficial additive to improve fermentation efficiency and resource recovery from waste activated sludge (WAS). However, its potentially detrimental impact on WAS fermentation such as H2S generation was overlooked previously. This study therefore aims to fill the gap through exploring whether and how the presence of RL affects H2S generation from WAS anaerobic fermentation. Experimental results showed that when RL increased from 0 to 40 mg/g total suspended solids (TSS), the cumulative H2S yield enhanced from 323.6 × 10-4 to 620.3 × 10-4 mg/g volatile suspended solids (VSS). Mechanism analysis showed that RL reduced WAS surface tension, which benefited transformations of organic sulfurs (e.g., aliphatic-S and sulfoxide) and inorganic sulfate from solid to liquid phase. The presence of RL not only reduced the ratio of α-helix/(β-sheet + random coil) and damaged the hydrogen bonding networks of organic sulfurs but also promoted substrate surface charges and cell membrane permeability. These facilitated the contact between hydrolase and organic sulfurs, thereby increasing sulfide production from organic sulfurs hydrolysis. Further investigations showed that RL promoted the expression of key genes (e.g., aprA/B and dsrA/B) involved in the dissimilatory sulfate reduction, which accelerated the reaction of adenosine 5'-phosphosulfate (APS)→ sulfite→ sulfide. Meanwhile, RL inhibited the corresponding key genes such as CysH, and Sir, responsible for assimilatory sulfate reduction (APS→3'-phosphoadenosine-5'phosphosulfate→organosulfur), which reduced substrate competition in favor of H2S production from dissimilatory sulfate reduction. Besides, RL decreased the fermentation pH, which benefited the transformation of HS- to H2S.
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Affiliation(s)
- Qizi Fu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Xuran Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Dandan He
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Xuemei Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Chenxi Li
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Mingting Du
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Yan Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Sha Long
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Dongbo Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
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Sánchez DA, Alnoch RC, Tonetto GM, Krieger N, Ferreira ML. Immobilization and bioimprinting strategies to enhance the performance in organic medium of the metagenomic lipase LipC12. J Biotechnol 2021; 342:13-27. [PMID: 34634391 DOI: 10.1016/j.jbiotec.2021.09.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 09/21/2021] [Accepted: 09/29/2021] [Indexed: 11/15/2022]
Abstract
The present work evaluates the immobilization of LipC12 on different supports in tandem with bioimprinting technique, in order to improve its activity and stability in organic medium. Oleic acid was selected as the bioimprinting molecule. The immobilized LipC12 was applied in the synthesis of pentyl oleate by esterification reaction and in the production of fatty acids, mono, and diglycerides via hydrolysis of triacylglycerols, in n-heptane reaction media. For all immobilized lipase preparations, an increase in the conversion of oleic acid to pentyl oleate was observed when immobilization in tandem with bioimprinting treatment was carried out versus immobilization without bioimprinting. The highest conversions were achieved using LipC12 immobilized on hydrophobic supports. The reuse potential of the immobilized preparations was evaluated. The preparations were used in eight successive cycles of esterification reactions and the best results were obtained for LipC12 immobilized on Immobead 150 and chitosan. The activity for the hydrolysis of soybean oil was improved by bioimprinting treatment only for LipC12 immobilized on commercial polypropylene and Accurel MP-1000. LipC12 immobilized on hydrophilic supports or on Immobead150 could be used to hydrolyze tricaprylin to obtain diglycerides with a high proportion of 1,2-diglycerides in reaction times as short as 30 min.
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Affiliation(s)
- Daniel Alberto Sánchez
- Departamento de Ingeniería Química, Universidad Nacional del Sur (UNS), Planta Piloto de Ingeniería, Química - PLAPIQUI (UNS-CONICET), Bahía Blanca 8000, Argentina.
| | - Robson Carlos Alnoch
- Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14040-901, São Paul, Brazil; Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Cx. P. 19046 Centro Politécnico, Curitiba 81531-980, Paraná, Brazil
| | - Gabriela Marta Tonetto
- Departamento de Ingeniería Química, Universidad Nacional del Sur (UNS), Planta Piloto de Ingeniería, Química - PLAPIQUI (UNS-CONICET), Bahía Blanca 8000, Argentina
| | - Nadia Krieger
- Departamento de Química, Universidade Federal do Paraná, Cx. P. 19081 Centro Politécnico, Curitiba 81531-980, Paraná, Brazil
| | - María Lujan Ferreira
- Departamento de Química, Universidad Nacional del Sur (UNS), Planta Piloto de Ingeniería, Química - PLAPIQUI (UNS-CONICET), Bahía Blanca 8000, Argentina
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6
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Estrada-Valenzuela D, Ramos-Sánchez VH, Zaragoza-Galán G, Espinoza-Hicks JC, Bugarin A, Chávez-Flores D. Lipase Assisted ( S)-Ketoprofen Resolution from Commercially Available Racemic Mixture. Pharmaceuticals (Basel) 2021; 14:ph14100996. [PMID: 34681221 PMCID: PMC8541352 DOI: 10.3390/ph14100996] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 09/24/2021] [Accepted: 09/26/2021] [Indexed: 11/16/2022] Open
Abstract
Ketoprofen is a commercially available drug sold as a racemic mixture that belongs to the family of non-steroidal anti-inflammatory drugs known as profens. It has been demonstrated (in vitro) that (S)-ketoprofen is around 160 times more potent than its enantiomer (R)-ketoprofen, while accumulation of (R)-ketoprofen can cause serious side effects, such as dyspepsia, gastrointestinal ulceration/bleeding, pain, salt and fluid retention, and hypertension. In this work, four commercially available lipases were systematically assessed. Parameters such as conversion, enantiomeric excess, and enantioselectivity were considered. Among them, and by evaluating lipase load, temperature, solvent, and alcohol, Candida rugosa lipase exhibited the best results in terms of enantioselectivity E = 185 ((S)-enantiopreference) with esterification conversions of c = 47% (out of 50%) and enantiomeric excess of 99%. The unreacted (R)-enantiomer was recovered by liquid-liquid extraction and racemized under basic media, which was recycled as starting material. Finally, the (S)-alkyl ketoprofen ester was successfully enzymatically hydrolyzed to the desired (S)-ketoprofen with c = 98.5% and 99% ee. This work demonstrated the benefit and efficiency of using Candida rugosa lipase to kinetically resolve racemic ketoprofen by an environmentally friendly protocol and with the recycling of the undesired (R)-ketoprofen.
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Affiliation(s)
- Daniela Estrada-Valenzuela
- Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Circuito Universitario, Chihuahua 31125, Mexico; (D.E.-V.); (V.H.R.-S.); (G.Z.-G.); (J.C.E.-H.)
| | - Víctor H. Ramos-Sánchez
- Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Circuito Universitario, Chihuahua 31125, Mexico; (D.E.-V.); (V.H.R.-S.); (G.Z.-G.); (J.C.E.-H.)
| | - Gerardo Zaragoza-Galán
- Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Circuito Universitario, Chihuahua 31125, Mexico; (D.E.-V.); (V.H.R.-S.); (G.Z.-G.); (J.C.E.-H.)
| | - Jose C. Espinoza-Hicks
- Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Circuito Universitario, Chihuahua 31125, Mexico; (D.E.-V.); (V.H.R.-S.); (G.Z.-G.); (J.C.E.-H.)
| | - Alejandro Bugarin
- Department of Chemistry & Physics, Florida Gulf Coast University, Fort Myers, FL 33965, USA
- Correspondence: (A.B.); (D.C.-F.)
| | - David Chávez-Flores
- Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Circuito Universitario, Chihuahua 31125, Mexico; (D.E.-V.); (V.H.R.-S.); (G.Z.-G.); (J.C.E.-H.)
- Correspondence: (A.B.); (D.C.-F.)
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7
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Zhang P, Chen J, Sun B, Sun C, Xu W, Tang K. Enhancement of the catalytic efficiency of Candida antarctica lipase A in enantioselective hydrolysis through immobilization onto a hydrophobic MOF support. Biochem Eng J 2021. [DOI: 10.1016/j.bej.2021.108066] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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Hu A, Cheng X, Wang C, Kang L, Chen P, He Q, Zhang G, Ye J, Zhou S. Extracellular polymeric substances trigger an increase in redox mediators for enhanced sludge methanogenesis. ENVIRONMENTAL RESEARCH 2020; 191:110197. [PMID: 32919968 DOI: 10.1016/j.envres.2020.110197] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 05/26/2020] [Accepted: 08/27/2020] [Indexed: 06/11/2023]
Abstract
Artificial redox mediators can be employed to improve the electron transfer efficiency during sludge methanogenesis, whereas these artificial redox mediators have possible deficiencies, such as high cost and non-biodegradability. For large-scale commercial applications, more cost-effective and environmentally friendly alternatives should be developed. Herein, the potential of extracellular polymeric substances (EPS) as natural redox mediators to improve methanogenesis was investigated. Compared to the control test without EPS addition, the methane (CH4) production yield was increased by 83.5 ± 2.4% with an EPS dosage of 0.50 g/L and the lag phase duration was shortened by 45.6 ± 7.0%, along with the enhanced sludge dewaterability. Spectroelectrochemical measurements implied that EPS addition notably changed the intensities of different redox-active groups, which decreased the charge transfer resistance and enhanced the extracellular electron transfer efficiency. These redox-active groups were mainly from the solubilization and hydrolysis of sludge protein due to increased protease activities, thereby leading to a higher acetate concentration during the acidification step. Further investigation showed that EPS addition also improved the activities of both acetotrophic and hydrogenotrophic methanogens, as indicated by a higher abundance of alpha subunit of methyl coenzyme M reductase (mcrA) genes, enhancing CH4 production. This work provides an innovative strategy for improving sludge anaerobic digestion with efficient additives.
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Affiliation(s)
- Andong Hu
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Xiaoyuan Cheng
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Chao Wang
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Li Kang
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Piao Chen
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Qiuxiang He
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
| | - Guangming Zhang
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China
| | - Jie Ye
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China.
| | - Shungui Zhou
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, 350002, Fujian, China
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Shoja M, Minai-Tehrani D. Effect of Tween Type Non-Ionic Detergent on the Activity of Lipase of Pseudomonas aeruginosa. Cell Biochem Biophys 2020; 79:87-92. [PMID: 33000354 DOI: 10.1007/s12013-020-00946-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/21/2020] [Indexed: 11/29/2022]
Abstract
Pseudomonas aeruginosa is a Gram-negative and rod-shaped bacterium. It can use a variety of carbon sources and grow in different culture media. Its versatile extracellular enzymes give it the ability to grow on complex carbon sources. One of the most important enzymes of this bacterium is lipase, which is an extracellular enzyme. Lipases are one of the most useful enzymes in medicine and industry, especially in the detergent industry. In recent years, lipases have become an important component of detergent powders, so it is important to evaluate the performance of lipases in the presence of detergents. The aim of this study was to investigate the effect of non-ionic detergents Tween 20 and 80 on the activity of the Pseudomonas lipase. These detergents reduced Km and increased Vmax of the enzyme. The enzyme activity increased in the presence of these detergents at optimal pH and temperature. Conformational studies with the purified enzyme by fluorescence spectrophotometry showed that in the presence of Tween 20 and 80, there was a hypochromicity in emission peak of the enzyme, which indicated that the enzyme became less compact in vicinity of these detergents.
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Affiliation(s)
- Maryam Shoja
- BioResearch Lab, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran
| | - Dariush Minai-Tehrani
- BioResearch Lab, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran.
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10
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Lipase Catalysis in Presence of Nonionic Surfactants. Appl Biochem Biotechnol 2019; 191:744-762. [DOI: 10.1007/s12010-019-03212-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Accepted: 12/05/2019] [Indexed: 02/06/2023]
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11
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Mitsou E, Kalogianni EP, Georgiou D, Stamatis H, Xenakis A, Zoumpanioti M. Formulation and Structural Study of a Biocompatible Water-in-Oil Microemulsion as an Appropriate Enzyme Carrier: The Model Case of Horseradish Peroxidase. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:150-160. [PMID: 30521342 DOI: 10.1021/acs.langmuir.8b03124] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A novel biocompatible water-in-oil microemulsion was developed using nonionic surfactants and was investigated as a potential enzyme delivery system for pharmaceutical applications. The system was composed of isopropyl myristate/polysorbate 80 (Tween 80)/distilled monoglycerides/water/propylene glycol (PG), had a low total surfactant concentration (8.3% w/w), and was able to incorporate approximately 3% w/w aqueous phase containing horseradish peroxidase (HRP). Structural and activity aspects of the system were studied using a variety of techniques such as dynamic light scattering (DLS), electron paramagnetic resonance (EPR), and dynamic interfacial tension. The apparent hydrodynamic diameter of the empty droplets was calculated at about 37 nm. Different enzyme concentrations, ranging from 0.01 to 1.39 μM, were used for both DLS and EPR studies to effectively determine the localization of the macromolecule in the microemulsion. According to the results, for high enzyme concentrations, a participation of HRP in the surfactant monolayer of the microemulsion is evident. The number of reverse micelles in the microemulsion was defined by a theoretical model and was used to clarify how the enzyme concentration affects the number of empty and loaded reverse micelles. To assure that the system allows the enzyme to retain its catalytic activity, an oxidative reaction catalyzed by HRP was successfully carried out with the use of the model substrate 2,2'-azino-bis[3-ethylbenzothiazoline-6-sulfonic acid]. The influence of several parameters such as temperature, pH, and PG concentration was examined to optimize the reaction conditions, and a kinetic study was conducted revealing an ordered-Bi-Bi mechanism. Values of all kinetic parameters were determined. The release of the encapsulated enzyme was studied using an adequate receiver phase, revealing the effectiveness of the proposed microemulsion not only as a microreactor but also as a carrier for therapeutic biomolecules.
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Affiliation(s)
- Evgenia Mitsou
- Institute of Biology, Medicinal Chemistry & Biotechnology , National Hellenic Research Foundation , 48, Vassileos Constantinou Avenue , 11635 Athens , Greece
- Laboratory of Biotechnology, Department of Biological Applications and Technologies , University of Ioannina , 45110 Ioannina , Greece
| | - Eleni P Kalogianni
- Department of Food Technology , Alexander Technological Educational Institute of Thessaloniki , P.O. Box 141, 57400 Thessaloniki , Greece
| | - Despoina Georgiou
- Department of Food Technology , Alexander Technological Educational Institute of Thessaloniki , P.O. Box 141, 57400 Thessaloniki , Greece
| | - Haralambos Stamatis
- Laboratory of Biotechnology, Department of Biological Applications and Technologies , University of Ioannina , 45110 Ioannina , Greece
| | - Aristotelis Xenakis
- Institute of Biology, Medicinal Chemistry & Biotechnology , National Hellenic Research Foundation , 48, Vassileos Constantinou Avenue , 11635 Athens , Greece
| | - Maria Zoumpanioti
- Institute of Biology, Medicinal Chemistry & Biotechnology , National Hellenic Research Foundation , 48, Vassileos Constantinou Avenue , 11635 Athens , Greece
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12
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Park S, Doan TTN, Koo YM, Oh KK, Lee SH. Ionic liquids as cosolvents for the lipase-catalyzed kinetic resolution of ketoprofen. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.09.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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13
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Zhang PL, Cheng Q, Xu W, Tang KW. Enzymatic Enantioselective Hydrolysis of 2-(3-Chlorophenyl) Propionic Acid Ester Enhanced by PEG: Experiment and Optimization. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b02377] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pan-Liang Zhang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, Hunan, China
| | - Qing Cheng
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, Hunan, China
| | - Weifeng Xu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, Hunan, China
| | - Ke-Wen Tang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, Hunan, China
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14
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Cloning, expression and characterization of the esterase estUT1 from Ureibacillus thermosphaericus which belongs to a new lipase family XVIII. Extremophiles 2018; 22:271-285. [PMID: 29330648 DOI: 10.1007/s00792-018-0996-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 12/23/2017] [Indexed: 10/18/2022]
Abstract
A new esterase gene from thermophilic bacteria Ureibacillus thermosphaericus was cloned into the pET32b vector and expressed in Escherichia coli BL21(DE3). Alignment of the estUT1 amino acid sequence revealed the presence of a novel canonical pentapeptide (GVSLG) and 41-47% identity to the closest family of the bacterial lipases XIII. Thus the esterase estUT1 from U. thermosphaericus was assigned as a member of the novel family XVIII. It also showed a strong activity toward short-chain esters (C2-C8), with the highest activity for C2. When p-nitrophenyl butyrate is used as a substrate, the temperature and pH optimum of the enzyme were 70-80 °C and 8.0, respectively. EstUT1 showed high thermostability and 68.9 ± 2.5% residual activity after incubation at 70 °C for 6 h. Homology modeling of the enzyme structure showed the presence of a putative catalytic triad Ser93, Asp192, and His222. The activity of estUT1 was inhibited by PMSF, suggesting that the serine residue is involved in the catalytic activity of the enzyme. The purified enzyme exhibited high stability in organic solvents. EstUT1 retained 85.8 ± 2.4% residual activity in 30% methanol at 50 °C for 6 h. Stability at high temperature and tolerance to organic solvents make estUT1 a promising enzyme for biotechnology application.
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15
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Chen G, Wang J, Su Y, Zhu Y, Zhang G, Zhao H, Liu H, Yang Y, Nian R, Zhang H, Wei Y, Xian M. Pullulan production from synthetic medium by a new mutant of Aureobasidium pullulans. Prep Biochem Biotechnol 2017; 47:963-969. [PMID: 28718734 DOI: 10.1080/10826068.2017.1350979] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Pullulan with different molecular-weight could be applied in various fields. A UV-induced mutagenesis Aureobasidium pullulans UVMU6-1 was obtained from the strain A. pullulans CGMCC3.933 for the production of low-molecular-weight pullulan. First, the obtained polysaccharide from A. pullulans UVMU6-1 was purified and identified to be pullulan with thin-layer chromatography, Fourier transform infrared, and nuclear magnetic resonance. Then, culture medium and conditions for this strain were optimized by flask fermentation. Based on the optimized medium and culture conditions (pH 4, addition of 4 g/L Tween 80 for 96 hr of cultivation), continuously fermentation was performed. The highest pullulan production and dry biomass was 109 and 125 g/L after fermentation for 114 hr, respectively. The average productivity was about 1 g/L/hr, which was intensively higher than the previous reported. This study would lay foundations for the industrial production of pullulan.
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Affiliation(s)
- Guoqiang Chen
- a CAS Key Laboratory of Biobased Materials , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao , P. R. China.,b College of Life Science , Qingdao University , Qingdao , P. R. China
| | - Jiming Wang
- a CAS Key Laboratory of Biobased Materials , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao , P. R. China
| | - Yulong Su
- c Key Laboratory for Tobacco Gene Resources , Tobacco Research Institute, Chinese Academy of Agricultural Sciences , Qingdao , P. R. China
| | - Youshuang Zhu
- d School of Biological Science , Jining Medical University , Jining , P. R. China
| | - Ge Zhang
- a CAS Key Laboratory of Biobased Materials , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao , P. R. China.,c Key Laboratory for Tobacco Gene Resources , Tobacco Research Institute, Chinese Academy of Agricultural Sciences , Qingdao , P. R. China
| | - Hongwei Zhao
- a CAS Key Laboratory of Biobased Materials , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao , P. R. China
| | - Haobao Liu
- c Key Laboratory for Tobacco Gene Resources , Tobacco Research Institute, Chinese Academy of Agricultural Sciences , Qingdao , P. R. China
| | - Ying Yang
- a CAS Key Laboratory of Biobased Materials , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao , P. R. China
| | - Rui Nian
- a CAS Key Laboratory of Biobased Materials , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao , P. R. China
| | - Haibo Zhang
- a CAS Key Laboratory of Biobased Materials , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao , P. R. China
| | - Yuxi Wei
- b College of Life Science , Qingdao University , Qingdao , P. R. China
| | - Mo Xian
- a CAS Key Laboratory of Biobased Materials , Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao , P. R. China
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16
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Toledo MV, Briand LE. Relevance and bio-catalytic strategies for the kinetic resolution of ketoprofen towards dexketoprofen. Crit Rev Biotechnol 2017; 38:778-800. [PMID: 29124963 DOI: 10.1080/07388551.2017.1399249] [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: 10/18/2022]
Abstract
This review presents the most relevant investigations concerning the biocatalytic kinetic resolution of racemic ketoprofen to dexketoprofen for the last 22 years. The advantages related to the administration of the dex-enantiomer in terms of human health, the so called "chiral switch" in the pharmaceutical industry and the sustainability of biotransformations have been the driving forces to develop innovative technology to obtain dexketoprofen. In particular, the kinetic resolution of racemic ketoprofen through enantiomeric esterification and hydrolysis using lipases as biocatalysts are thoroughly revised and commented upon. In this context, the biocatalysts, acyl-acceptors (alcohols), reaction conditions, conversion, enantiomeric excess, and enantiomeric ratio among others are discussed. Moreover, the investigations concerning scaling up processes in order to obtain an optically pure enantiomer of the profen are presented. Finally, some guidelines about perspectives of the technology and research opportunities are given.
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Affiliation(s)
- María Victoria Toledo
- a Centro de Investigación y Desarrollo en Ciencias Aplicadas-Dr. Jorge J. Ronco (CINDECA) , Universidad Nacional de La Plata, CONICET , La Plata , Buenos Aires , Argentina
| | - Laura Estefanía Briand
- a Centro de Investigación y Desarrollo en Ciencias Aplicadas-Dr. Jorge J. Ronco (CINDECA) , Universidad Nacional de La Plata, CONICET , La Plata , Buenos Aires , Argentina
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17
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Koszelewski D, Paprocki D, Brodzka A, Ostaszewski R. Enzyme mediated kinetic resolution of δ-hydroxy-α,β-unsaturated esters as a route to optically active δ-lactones. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.tetasy.2017.05.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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18
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Gilani SL, Najafpour GD, Heydarzadeh HD, Moghadamnia A. Enantioselective synthesis of (S)-naproxen using immobilized lipase on chitosan beads. Chirality 2017; 29:304-314. [DOI: 10.1002/chir.22689] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 12/11/2016] [Accepted: 12/16/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Saeedeh L. Gilani
- Faculty of Chemical Engineering; Babol Noshirvani University of Technology; Babol Iran
| | - Ghasem D. Najafpour
- Faculty of Chemical Engineering; Babol Noshirvani University of Technology; Babol Iran
| | - Hamid D. Heydarzadeh
- Faculty of Petroleum and Petrochemical Engineering; Hakim Sabzevari University; Sabzevar Iran
| | - Aliakbar Moghadamnia
- Department of Pharmacology and Physiology, School of Medicine; Babol University of Medical Sciences; Babol Iran
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19
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Kim J, Seok SH, Hong E, Yoo TH, Seo MD, Ryu Y. Crystal structure and characterization of esterase Est25 mutants reveal improved enantioselectivity toward (S)-ketoprofen ethyl ester. Appl Microbiol Biotechnol 2016; 101:2333-2342. [PMID: 27915377 DOI: 10.1007/s00253-016-7989-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 09/25/2016] [Accepted: 11/05/2016] [Indexed: 11/25/2022]
Abstract
Esterases comprise a group of enzymes that catalyze the cleavage and synthesis of ester bonds. They are important in biotechnological applications owing to their enantioselectivity, regioselectivity, broad substrate specificity, and the fact that they do not require cofactors. In a previous study, we isolated the esterase Est25 from a metagenomic library. Est25 showed catalytic activity toward the (R,S)-ketoprofen ethyl ester but had low enantioselectivity toward the (S)-ketoprofen ethyl ester. Because (S)-ketoprofen has stronger anti-inflammatory effects and fewer side effects than (R)-ketoprofen, enantioselectivity of this esterase is important. In this study, we generated Est25 mutants with improved enantioselectivity toward the (S)-ketoprofen ethyl ester; improved enantioselectivity of mutants was established by analysis of their crystal structures. The enantioselectivity of mutants was influenced by substitution of Phe72 and Leu255. Substituting these residues changed the size of the binding pocket and the entrance hole that leads to the active site. The enantioselectivity of Est25 (E = 1.1 ± 0.0) was improved in the mutants F72G (E = 1.9 ± 0.2), L255W (E = 16.1 ± 1.1), and F72G/L255W (E = 60.1 ± 0.5). Finally, characterization of Est25 mutants was performed by determining the optimum reaction conditions, thermostability, effect of additives, and substrate specificity after substituting Phe72 and Leu255.
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Affiliation(s)
- Jinyeong Kim
- Department of Molecular Science and Technology, Ajou University, Suwon, 16499, South Korea
| | | | - Eunsoo Hong
- Department of Molecular Science and Technology, Ajou University, Suwon, 16499, South Korea
| | - Tae Hyeon Yoo
- Department of Molecular Science and Technology, Ajou University, Suwon, 16499, South Korea
| | - Min-Duk Seo
- Department of Molecular Science and Technology, Ajou University, Suwon, 16499, South Korea. .,College of Pharmacy, Ajou University, Suwon, 16499, South Korea.
| | - Yeonwoo Ryu
- Department of Molecular Science and Technology, Ajou University, Suwon, 16499, South Korea.
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20
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Nielsen CK, Kjems J, Mygind T, Snabe T, Meyer RL. Effects of Tween 80 on Growth and Biofilm Formation in Laboratory Media. Front Microbiol 2016; 7:1878. [PMID: 27920774 PMCID: PMC5118432 DOI: 10.3389/fmicb.2016.01878] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 11/08/2016] [Indexed: 02/02/2023] Open
Abstract
Tween 80 is a widely used non-ionic emulsifier that is added to cosmetics, pharmaceuticals, and foods. Because of its widespread use we need to understand how it affects bacteria on our skin, in our gut, and in food products. The aim of this study is to investigate how Tween 80 affects the growth and antimicrobial susceptibility of Staphylococcus aureus, Listeria monocytogenes, and Pseudomonas fluorescens, which are common causes of spoilage and foodborne illnesses. Addition of 0.1% Tween 80 to laboratory growth media increased the growth rate of planktonic S. aureus batch cultures, and it also increased the total biomass when S. aureus was grown as biofilms. In contrast, Tween 80 had no effect on batch cultures of L. monocytogenes, it slowed the growth rate of P. fluorescens, and it led to formation of less biofilm by both L. monocytogenes and P. fluorescens. Furthermore, Tween 80 lowered the antibacterial efficacy of two hydrophobic antimicrobials: rifampicin and the essential oil isoeugenol. Our findings underline the importance of documenting indirect effects of emulsifiers when studying the efficacy of hydrophobic antimicrobials that are dispersed in solution by emulsification, or when antimicrobials are applied in food matrixes that include emulsifiers. Furthermore, the species-specific effects on microbial growth suggests that Tween 80 in cosmetics and food products could affect the composition of skin and gut microbiota, and the effect of emulsifiers on the human microbiome should therefore be explored to uncover potential health effects.
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Affiliation(s)
| | - Jørgen Kjems
- Interdisciplinary Nanoscience Center, Aarhus University Aarhus, Denmark
| | - Tina Mygind
- DuPont Nutrition Biosciences Brabrand, Denmark
| | | | - Rikke L Meyer
- Interdisciplinary Nanoscience Center, Aarhus University Aarhus, Denmark
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21
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Cao X, Xu S, Ni Y, Lu YY, Li HH, Chen KQ, Ouyang PK. Increasing the hydrolytic activity of lipase in oil/water two-phase system using surfactant–enzyme nanocomposite. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcatb.2017.02.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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22
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Liang YR, Wu Q, Lin XF. Effect of Additives on the Selectivity and Reactivity of Enzymes. CHEM REC 2016; 17:90-121. [PMID: 27490244 DOI: 10.1002/tcr.201600016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Indexed: 01/05/2023]
Abstract
Enzymes have been widely used as efficient, eco-friendly, and biodegradable catalysts in organic chemistry due to their mild reaction conditions and high selectivity and efficiency. In recent years, the catalytic promiscuity of many enzymes in unnatural reactions has been revealed and studied by chemists and biochemists, which has expanded the application potential of enzymes. To enhance the selectivity and activity of enzymes in their natural or promiscuous reactions, many methods have been recommended, such as protein engineering, process engineering, and media engineering. Among them, the additive approach is very attractive because of its simplicity to use and high efficiency. In this paper, we will review the recent developments about the applications of additives to improve the catalytic performances of enzymes in their natural and promiscuous reactions. These additives include water, organic bases, water mimics, cosolvents, crown ethers, salts, surfactants, and some particular molecular additives.
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Affiliation(s)
- Yi-Ru Liang
- Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Qi Wu
- Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Xian-Fu Lin
- Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
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23
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Wang B, Wang A, Cao Z, Zhu G. Characterization of a novel highly thermostable esterase from the Gram-positive soil bacteriumStreptomyces lividansTK64. Biotechnol Appl Biochem 2016; 63:334-43. [DOI: 10.1002/bab.1465] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Accepted: 11/21/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Baojuan Wang
- Institute of Molecular Biology and Biotechnology and Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources; College of Life Sciences; Anhui Normal University; Wuhu Anhui People's Republic of China
| | - Ao Wang
- Institute of Molecular Biology and Biotechnology and Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources; College of Life Sciences; Anhui Normal University; Wuhu Anhui People's Republic of China
- College of Physical Education; Anhui Normal University; Wuhu Anhui People's Republic of China
| | - Zhengyu Cao
- Institute of Molecular Biology and Biotechnology and Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources; College of Life Sciences; Anhui Normal University; Wuhu Anhui People's Republic of China
| | - Guoping Zhu
- Institute of Molecular Biology and Biotechnology and Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources; College of Life Sciences; Anhui Normal University; Wuhu Anhui People's Republic of China
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24
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Ozyilmaz E, Bayrakci M, Yilmaz M. Improvement of catalytic activity of Candida rugosa lipase in the presence of calix[4]arene bearing iminodicarboxylic/phosphonic acid complexes modified iron oxide nanoparticles. Bioorg Chem 2016; 65:1-8. [DOI: 10.1016/j.bioorg.2015.12.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 11/25/2015] [Accepted: 12/01/2015] [Indexed: 11/27/2022]
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25
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Madureira AR, Campos DA, Oliveira A, Sarmento B, Pintado MM, Gomes AM. Insights into the protective role of solid lipid nanoparticles on rosmarinic acid bioactivity during exposure to simulated gastrointestinal conditions. Colloids Surf B Biointerfaces 2016; 139:277-84. [PMID: 26766625 DOI: 10.1016/j.colsurfb.2015.11.039] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 11/19/2015] [Accepted: 11/20/2015] [Indexed: 10/22/2022]
Abstract
The evaluation of the digestion effects on bioactive solid lipid nanoparticles (SLN) was performed. For this purpose, witepsol and carnauba SLN loaded with rosmarinic acid (RA) were exposed to the simulated gastrointestinal tract (GIT) conditions prevailing in stomach and small intestine. The simulation of intestinal epithelium was made with a dialysis bag and intestinal cell culture lines. Changes on SLN physical properties, RA release and absorption profiles were followed at each step. Combination of digestion pH and enzymes showed a significant effect upon SLN physical properties. Zeta potential values increased at stomach conditions and decreased at small intestine simulation. Also, at intestine, SLN increased their sizes and released 40-60% of RA, maintaining its initial antioxidant activity values. Sustained release of 40% of RA from SLN was also observed in dialysis tube. At CaCo-2 cell line, both types of SLN showed similar absorbed RA % (ca. 30%). Nevertheless, in CaCo-2/HT29x mix cell lines, for carnauba SLN a lower adsorption RA % was observed than for witepsol SLN. Solid lipid nanoparticles protected RA bioactivity (in terms of antioxidant activity) until reaching the intestine. A controlled release of RA from SLN was achieved and a significant absorption was observed at intestinal cells. Overall, SLN produced with witepsol showed a higher stability than carnauba SLN.
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Affiliation(s)
- Ana Raquel Madureira
- CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Rua Arquiteto Lobão Vital Apartado 2511, 4202-401 Porto, Portugal.
| | - Débora A Campos
- CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Rua Arquiteto Lobão Vital Apartado 2511, 4202-401 Porto, Portugal
| | - Ana Oliveira
- CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Rua Arquiteto Lobão Vital Apartado 2511, 4202-401 Porto, Portugal
| | - Bruno Sarmento
- I3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Portugal and INEB-Instituto de Engenharia Biomédica, Universidade do Porto, Rua do Campo Alegre, Portugal; CESPU, Instituto de Investigação e Formação Avançada em Ciências e Tecnologias da Saúde, Rua Central de Gandra 1317, 4585-116 Gandra-PRD, Portugal
| | - Maria Manuela Pintado
- CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Rua Arquiteto Lobão Vital Apartado 2511, 4202-401 Porto, Portugal
| | - Ana Maria Gomes
- CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Rua Arquiteto Lobão Vital Apartado 2511, 4202-401 Porto, Portugal
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26
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Aarthy M, Saravanan P, Ayyadurai N, Gowthaman MK, Kamini NR. A two step process for production of omega 3-polyunsaturated fatty acid concentrates from sardine oil using Cryptococcus sp. MTCC 5455 lipase. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcatb.2015.12.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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27
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Purification and characterization of polysaccharides degradases produced by Alteromonas sp. A321. Int J Biol Macromol 2016; 86:96-104. [PMID: 26774375 DOI: 10.1016/j.ijbiomac.2016.01.033] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Revised: 01/05/2016] [Accepted: 01/09/2016] [Indexed: 11/21/2022]
Abstract
Two different degradases from Alteromonas sp. A321 for polysaccharides from Enteromorpha prolifera (DPE-L and DPE-P) were purified to homogeneity. The molecular weights of purified DPE-L and DPE-P were 75.2 and 102.5 kDa, respectively, and their internal sequences were analysed by LC-MS-MS. The enzymes exhibited an optimum temperature of 30-40 °C (DPE-L) and 35-45 °C (DPE-P), an optimum pH of 7.0 (DPE-L) and 6.0 (DPE-P). DPE-P was highly stable in the presence of EDTA and 1,10-phenanthroline while DPE-L was inhibited by 1,10-phenanthroline. The Km values of DPE-L and DPE-P were 2.93 mg/ml and 0.31 mg/ml and the Vmax values were 6.11 μmol/min/ml and 2.88 μmol/min/ml, respectively. Results of HPLC and ESI-MS analyses showed that enzymatic products were: Rha1(SO3H)1, Rha1(SO3H)1Gluc1, Rha2(SO3H)2Gluc1, and Rha3(SO3H)3Gluc1Xyl1 by DPE-L, and Glu2, Glu3, plus Glu4 by DPE-P, respectively. Thus DPE-L and DPE-P can be used to produce oligosaccharides which potentially revealed more of structure of polysaccharides from E. prolifera.
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28
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Gong Y, Xu GC, Chen Q, Yin JG, Li CX, Xu JH. Iterative multitarget evolution dramatically enhances the enantioselectivity and catalytic efficiency of Bacillus subtilis esterase towards bulky benzoate esters of dl-menthol. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01723h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Structure-based directed evolution has been successfully applied to Bacillus subtilis esterase to produce a mutant with higher enantioselectivity and elevated efficiency.
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Affiliation(s)
- Yi Gong
- Laboratory of Biocatalysis and Synthetic Biotechnology
- State Key Laboratory of Bioreactor Engineering
- Shanghai Collaborative Innovation Center for Biomanufacturing
- East China University of Science and Technology
- Shanghai 200237
| | - Guo-Chao Xu
- Laboratory of Biocatalysis and Synthetic Biotechnology
- State Key Laboratory of Bioreactor Engineering
- Shanghai Collaborative Innovation Center for Biomanufacturing
- East China University of Science and Technology
- Shanghai 200237
| | - Qi Chen
- Laboratory of Biocatalysis and Synthetic Biotechnology
- State Key Laboratory of Bioreactor Engineering
- Shanghai Collaborative Innovation Center for Biomanufacturing
- East China University of Science and Technology
- Shanghai 200237
| | - Jin-Gang Yin
- Laboratory of Biocatalysis and Synthetic Biotechnology
- State Key Laboratory of Bioreactor Engineering
- Shanghai Collaborative Innovation Center for Biomanufacturing
- East China University of Science and Technology
- Shanghai 200237
| | - Chun-Xiu Li
- Laboratory of Biocatalysis and Synthetic Biotechnology
- State Key Laboratory of Bioreactor Engineering
- Shanghai Collaborative Innovation Center for Biomanufacturing
- East China University of Science and Technology
- Shanghai 200237
| | - Jian-He Xu
- Laboratory of Biocatalysis and Synthetic Biotechnology
- State Key Laboratory of Bioreactor Engineering
- Shanghai Collaborative Innovation Center for Biomanufacturing
- East China University of Science and Technology
- Shanghai 200237
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29
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Chemoenzymatic synthesis of ( R )- and ( S )-propranolol using an engineered epoxide hydrolase with a high turnover number. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcatb.2015.10.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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30
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Cloning and characterization of a novel thermostable esterase from Bacillus gelatini KACC 12197. Protein Expr Purif 2015; 116:90-7. [DOI: 10.1016/j.pep.2015.08.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 08/07/2015] [Accepted: 08/08/2015] [Indexed: 11/20/2022]
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31
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Liu K, Chen Y, Xiao N, Zheng X, Li M. Effect of humic acids with different characteristics on fermentative short-chain fatty acids production from waste activated sludge. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:4929-4936. [PMID: 25825920 DOI: 10.1021/acs.est.5b00200] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Recently, the use of waste activated sludge to bioproduce short-chain fatty acids (SCFA) has attracted much attention as the sludge-derived SCFA can be used as a preferred carbon source to drive biological nutrient removal or biopolymer (polyhydroxyalkanoates) synthesis. Although large number of humic acid (HA) has been reported in sludge, the influence of HA on SCFA production has never been documented. This study investigated the effects on sludge-derived SCFA production of two commercially available humic acids (referred to as SHHA and SAHA purchased respectively from Shanghai Reagent Company and Sigma-Aldrich) that differ in chemical structure, hydrophobicity, surfactant properties, and degree of aromaticity. It was found that SHHA remarkably enhanced SCFA production (1.7-3.5 folds), while SAHA had no obvious effect. Mechanisms study revealed that all four steps (solubilization, hydrolysis, acidification, and methanogenesis) involved in sludge fermentation were unaffected by SAHA. However, SHHA remarkably improved the solubilization of sludge protein and carbohydrate and the activity of hydrolysis enzymes (protease and α-glucosidase) owing to its greater hydrophobicity and protection of enzyme activity. SHHA also enhanced the acidification step by accelerating the bioreactions of glyceradehyde-3P → d-glycerate 1,3-diphosphate, and pyruvate → acetyl-CoA due to its abundant quinone groups which served as electron acceptor. Further investigation showed that SHHA negatively influenced the activity of acetoclastic methanogens for its competition for electrons and inhibition on the reaction of acetyl-CoA → 5-methyl-THMPT, which caused less SCFA being consumed. All these observations were in correspondence with SHHA significantly enhancing the production of sludge derived SCFA.
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Affiliation(s)
- Kun Liu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Yinguang Chen
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Naidong Xiao
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Xiong Zheng
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Mu Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
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Cruz-Izquierdo Á, Picó EA, López C, Serra JL, Llama MJ. Magnetic Cross-Linked Enzyme Aggregates (mCLEAs) of Candida antarctica lipase: an efficient and stable biocatalyst for biodiesel synthesis. PLoS One 2014; 9:e115202. [PMID: 25551445 PMCID: PMC4281201 DOI: 10.1371/journal.pone.0115202] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Accepted: 11/19/2014] [Indexed: 11/18/2022] Open
Abstract
Enzyme-catalyzed production of biodiesel is the object of extensive research due to the global shortage of fossil fuels and increased environmental concerns. Herein we report the preparation and main characteristics of a novel biocatalyst consisting of Cross-Linked Enzyme Aggregates (CLEAs) of Candida antarctica lipase B (CALB) which are covalently bound to magnetic nanoparticles, and tackle its use for the synthesis of biodiesel from non-edible vegetable and waste frying oils. For this purpose, insolubilized CALB was covalently cross-linked to magnetic nanoparticles of magnetite which the surface was functionalized with -NH2 groups. The resulting biocatalyst combines the relevant catalytic properties of CLEAs (as great stability and feasibility for their reutilization) and the magnetic character, and thus the final product (mCLEAs) are superparamagnetic particles of a robust catalyst which is more stable than the free enzyme, easily recoverable from the reaction medium and reusable for new catalytic cycles. We have studied the main properties of this biocatalyst and we have assessed its utility to catalyze transesterification reactions to obtain biodiesel from non-edible vegetable oils including unrefined soybean, jatropha and cameline, as well as waste frying oil. Using 1% mCLEAs (w/w of oil) conversions near 80% were routinely obtained at 30°C after 24 h of reaction, this value rising to 92% after 72 h. Moreover, the magnetic biocatalyst can be easily recovered from the reaction mixture and reused for at least ten consecutive cycles of 24 h without apparent loss of activity. The obtained results suggest that mCLEAs prepared from CALB can become a powerful biocatalyst for application at industrial scale with better performance than those currently available.
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Affiliation(s)
- Álvaro Cruz-Izquierdo
- Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Bilbao, Spain
| | - Enrique A. Picó
- Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Bilbao, Spain
| | - Carmen López
- Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Bilbao, Spain
- IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
- * E-mail:
| | - Juan L. Serra
- Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Bilbao, Spain
| | - María J. Llama
- Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Bilbao, Spain
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Akoz E, Sayin S, Kaplan S, Yilmaz M. Improvement of catalytic activity of lipase in the presence of calix[4]arene valeric acid or hydrazine derivative. Bioprocess Biosyst Eng 2014; 38:595-604. [DOI: 10.1007/s00449-014-1299-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 09/30/2014] [Indexed: 11/30/2022]
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Pan J, Dang ND, Zheng GW, Cheng B, Ye Q, Xu JH. Efficient production of l-menthol in a two-phase system with SDS using an immobilized Bacillus subtilis esterase. BIORESOUR BIOPROCESS 2014. [DOI: 10.1186/s40643-014-0012-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
levo-Menthol is an important flavoring chemical, which can be prepared by enantioselective enzymatic hydrolysis of dl-menthyl esters. A recombinant esterase (BsE) cloned from Bacillus subtilis 0554 shows excellent enantioselectivity to dl-menthyl acetate and has been immobilized using cross-linked enzyme aggregates. Though BsE has relatively high substrate tolerance, the conversion of dl-menthyl acetate decreased sharply with the increase of substrate loading from 1 to 3 M in mono-aqueous system, which might be due to the severe inhibition of enzyme activity at extremely high load of substrate or product. In this work, enzymatic hydrolysis of dl-menthyl acetate with an extremely high load using the immobilized CLEA-BsE was investigated in an organic-aqueous biphasic system containing surfactant to establish a promising bioprocess for large-scale production of l-menthol.
Results
An efficient biphasic reaction system of pentanol-water containing sodium dodecyl sulfate (SDS) was developed for improving enantioselective hydrolysis of dl-menthyl acetate to produce l-menthol by immobilized BsE. Under the optimized reaction conditions, l-menthol was produced in >97% enantiomeric excess (ee) at a substrate load of up to 3.0 M with >40% conversion.
Conclusions
All the positive features demonstrate the potential applicability of the bioprocess for the large-scale production of l-menthol.
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Stepwise and combinatorial optimization of enantioselectivity for the asymmetric hydrolysis of 1-(3’,4’-methylenedioxyphenyl)ethyl acetate under use of a cold-adapted Bacillus amyloliquefaciens esterase. BIOTECHNOL BIOPROC E 2014. [DOI: 10.1007/s12257-013-0559-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Tielmann P, Kierkels H, Zonta A, Ilie A, Reetz MT. Increasing the activity and enantioselectivity of lipases by sol-gel immobilization: further advancements of practical interest. NANOSCALE 2014; 6:6220-8. [PMID: 24676487 DOI: 10.1039/c3nr06317h] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The entrapment of lipases in hydrophobic silicate matrices formed by sol-gel mediated hydrolysis of RSi(OCH3)3/Si(OCH3)4 as originally reported in 1996 has been improved over the years by a number of modifications. In the production of second-generation sol-gel lipase immobilizates, a variety of additives during the sol-gel process leads to increased activity and enhanced stereoselectivity in esterifying kinetic resolution. Recent advances in this type of lipase immobilization are reviewed here, in addition to new results regarding the sol-gel entrapment of the lipase from Burkholderia cepacia. It constitutes an excellent heterogeneous biocatalyst in the acylating kinetic resolution of two synthetically and industrially important chiral alcohols, rac-sulcatol and rac-trans-2-methoxycyclohexanol. The observation that the catalyst can be used 10 times in recycling experiments without losing its significant activity or enantioselectivity demonstrates the practical viability of the sol-gel approach.
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Affiliation(s)
- Patrick Tielmann
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim/Ruhr, Germany.
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Akoz E, Akbulut OY, Yilmaz M. Calix[n]arene Carboxylic Acid Derivatives as Regulators of Enzymatic Reactions: Enhanced Enantioselectivity in Lipase-Catalyzed Hydrolysis of (R/S)-Naproxen Methyl Ester. Appl Biochem Biotechnol 2013; 172:509-23. [DOI: 10.1007/s12010-013-0527-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Accepted: 09/15/2013] [Indexed: 11/28/2022]
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38
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A surfactant-coated lipase immobilized in magnetic nanoparticles for multicycle ethyl isovalerate enzymatic production. Biochem Eng J 2013. [DOI: 10.1016/j.bej.2013.01.017] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Immobilization of Candida rugosa lipase on hexagonal mesoporous silicas and selective esterification in nonaqueous medium. Biochem Eng J 2013. [DOI: 10.1016/j.bej.2012.10.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Abstract
Lipases can be efficiently entrapped in the pores of hydrophobic silicates by a simple and cheap sol-gel process in which a mixture of a hydrophobic alkylsilane RSi(OCH3)3 and Si(OCH3)4 is hydrolyzed under basic conditions in the presence of the enzyme. Additives such as isopropanol, polyvinyl alcohol, cyclodextrins, ionic liquids or surfactants enhance the efficiency of this type of lipase-immobilization. The main area of application of these heterogeneous biocatalysts concerns esterification or transesterification in organic solvents, ionic liquids, or supercritical carbon dioxide. Rate enhancements (relative to the traditional use of lipase powders) of several orders of magnitude have been observed, in addition to higher thermal stability. The lipase-immobilizates are particularly useful in the kinetic resolution of chiral esters, enantioselectivity often being higher than what is observed when using the commercial forms of these lipases (powder or classical immobilizates). Thus, due to the low price of sol-gel entrapment, the excellent performance of the lipase-immobilizates, and the ready recyclability, the method is industrially viable.
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Affiliation(s)
- Manfred T Reetz
- Max-Planck-Institut fur Kohlenforschung, Mulheim an der Ruhr, Germany
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41
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Identification and characterization of a novel cold-adapted esterase from a metagenomic library of mountain soil. ACTA ACUST UNITED AC 2012; 39:681-9. [DOI: 10.1007/s10295-011-1080-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Accepted: 12/29/2011] [Indexed: 12/12/2022]
Abstract
Abstract
A novel lipolytic enzyme was isolated from a metagenomic library after demonstration of lipolytic activity on an LB agar plate containing 1% (w/v) tributyrin. A novel esterase gene (estIM1), encoding a lipolytic enzyme (EstIM1), was cloned using a shotgun method from a pFosEstIM1 clone of the metagenomic library, and the enzyme was characterized. The estIM1 gene had an open reading frame (ORF) of 936 base pairs and encoded a protein of 311 amino acids with a molecular mass 34 kDa and a pI value of 4.32. The deduced amino acid sequence was 62% identical to that of an esterase from an uncultured bacterium (ABQ11271). The amino acid sequence indicated that EstIM1 was a member of the family IV of lipolytic enzymes, all of which contain a GDSAG motif shared with similar enzymes of lactic acid microorganisms. EstIM1 was active over a temperature range of 1–50°C, at alkaline pH. The activation energy for hydrolysis of p-nitrophenyl propionate was 1.04 kcal/mol, within a temperature range of 1–40°C. The activity of EstIM1 was about 60% of maximal even at 1°C, suggesting that EstIM1 is efficiently cold-adapted. Further characterization of this cold-adapted enzyme indicated that the esterase may be very valuable in industrial applications.
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Sorour N, Karboune S, Saint-Louis R, Kermasha S. Lipase-catalyzed synthesis of structured phenolic lipids in solvent-free system using flaxseed oil and selected phenolic acids as substrates. J Biotechnol 2012; 158:128-36. [DOI: 10.1016/j.jbiotec.2011.12.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Revised: 12/02/2011] [Accepted: 12/06/2011] [Indexed: 11/28/2022]
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Enhancement of the activity and enantioselectivity of lipase by sol-gel encapsulation immobilization onto β-cyclodextrin-based polymer. Appl Biochem Biotechnol 2012; 166:1927-40. [PMID: 22383051 DOI: 10.1007/s12010-012-9621-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Accepted: 02/20/2012] [Indexed: 10/28/2022]
Abstract
Candida rugosa lipase was encapsulated within a chemically inert sol-gel support prepared by polycondensation with tetraethoxysilane and octyltriethoxysilane in the presence of β-cyclodextrin-based polymer. The catalytic activity of the encapsulated lipases was evaluated both in the hydrolysis of p-nitrophenylpalmitate and the enantioselective hydrolysis of racemic Naproxen methyl ester. It has been observed that the percent activity yield of the encapsulated lipase was 65 U/g, which is 7.5 times higher than that of the covalently immobilized lipase. The β-cyclodextrin-based encapsulated lipases had higher conversion and enantioselectivity compared with covalently immobilized lipase. The study confirms an excellent enantioselectivity (E >300) for the encapsulated lipase with an enantiomeric excess value of 98% for S-naproxen.
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Acevedo-Rocha CG, Reetz MT. Tuning lipase activity with perfluoro carboxylic acids as additives. Catal Sci Technol 2012. [DOI: 10.1039/c2cy20173a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Expression and Characterization of a Novel Lipase from Aspergillus fumigatus with High Specific Activity. Appl Biochem Biotechnol 2011; 165:949-62. [DOI: 10.1007/s12010-011-9311-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2011] [Accepted: 06/19/2011] [Indexed: 10/18/2022]
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47
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Catalytic effect of calix[n]arene based sol–gel encapsulated or covalent immobilized lipases on enantioselective hydrolysis of (R/S)-naproxen methyl ester. J INCL PHENOM MACRO 2011. [DOI: 10.1007/s10847-011-9962-1] [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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48
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Song YS, Lee HU, Lee JH, Park C, Kim SW. Enzyme-catalyzed resolution of racemate using enzyme functionalized silica nanoparticles in the presence of surfactants. Process Biochem 2011. [DOI: 10.1016/j.procbio.2010.12.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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49
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50
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Significantly Improved Expression and Biochemical Properties of Recombinant Serratia marcescens Lipase as Robust Biocatalyst for Kinetic Resolution of Chiral Ester. Appl Biochem Biotechnol 2010; 162:2387-99. [DOI: 10.1007/s12010-010-9011-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2010] [Accepted: 06/11/2010] [Indexed: 10/19/2022]
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