1
|
Rodrigues CA, Santos JCB, Barbosa MS, Lisboa MC, Souza RL, Mendes AA, Pereira MM, Lima ÁS, Soares CMF. Extending the computational and experimental analysis of lipase active site selectivity. Bioprocess Biosyst Eng 2024; 47:313-323. [PMID: 38438572 DOI: 10.1007/s00449-023-02956-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Accepted: 11/22/2023] [Indexed: 03/06/2024]
Abstract
Molecular docking is an important computational analysis widely used to predict the interaction of enzymes with several starting materials for developing new valuable products from several starting materials, including oils and fats. In the present study, molecular docking was used as an efficient in silico screening tool to select biocatalysts with the highest catalytic performance in butyl esters production in a solvent-free system, an eco-friendly approach, via direct esterification of free fatty acids from Licuri oil with butanol. For such purpose, three commercial lipase preparations were used to perform molecular docking studies such as Burkholderia cepacia (BCL), Porcine pancreatic (PPL), and Candida rugosa (CRL). Concurrently, the results obtained in BCL and CRL are the most efficient in the esterification process due to their higher preference for catalyzing the esterification of lauric acid, the main fatty acid found in the licuri oil composition. Meanwhile, PPL was the least efficient because it preferentially interacts with minor fatty acids. Molecular docking with the experimental results indicated the better performance in the synthesis of esters was BCL. In conclusion, experimental results analysis shows higher enzymatic productivity in esterification reactions of 1294.83 μmol/h.mg, while the CRL and PPL demonstrated the lowest performance (189.87 μmol / h.mg and 23.96 μmol / h.mg, respectively). Thus, molecular docking and experimental results indicate that BCL is a more efficient lipase to produce fatty acids and esters from licuri oil with a high content of lauric acid. In addition, this study also demonstrates the application of molecular docking as an important tool for lipase screening to achieve more sustainable production of butyl esters with a view synthesis of biolubricants.
Collapse
Affiliation(s)
- César A Rodrigues
- Universidade Tiradentes, Av. Murilo Dantas 300, Farolândia, Aracaju, SE, 49032-490, Brazil
| | - Jefferson C B Santos
- Universidade Tiradentes, Av. Murilo Dantas 300, Farolândia, Aracaju, SE, 49032-490, Brazil
| | - Milson S Barbosa
- Universidade Tiradentes, Av. Murilo Dantas 300, Farolândia, Aracaju, SE, 49032-490, Brazil
| | - Milena C Lisboa
- Universidade Tiradentes, Av. Murilo Dantas 300, Farolândia, Aracaju, SE, 49032-490, Brazil
| | - Ranyere L Souza
- Universidade Tiradentes, Av. Murilo Dantas 300, Farolândia, Aracaju, SE, 49032-490, Brazil
- Instituto de Tecnologia E Pesquisa, Av. Murilo Dantas 300, Prédio Do ITP, Farolândia, Aracaju, SE, 49032-490, Brazil
| | - Adriano A Mendes
- Instituto de Química, Universidade Federal de Alfenas, Alfenas, MG, MG - CEP: 37130-001, Brazil
| | - Matheus M Pereira
- Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima, Pólo II - Pinal de Marrocos, 3030-760, Coimbra, Portugal
| | - Álvaro S Lima
- Departamento de Engenharia Química, UFBA, Universidade Federal da Bahia, Rua Aristides Novis 2, Federação, Salvador, BA, Brazil
| | - Cleide M F Soares
- Universidade Tiradentes, Av. Murilo Dantas 300, Farolândia, Aracaju, SE, 49032-490, Brazil.
- Instituto de Tecnologia E Pesquisa, Av. Murilo Dantas 300, Prédio Do ITP, Farolândia, Aracaju, SE, 49032-490, Brazil.
| |
Collapse
|
2
|
Souza DES, Santos LMF, Freitas JPA, de Almeida LC, Santos JCB, de Souza RL, Pereira MM, Lima ÁS, Soares CMF. Experimental and Computational Analysis of Synthesis Conditions of Hybrid Nanoflowers for Lipase Immobilization. Molecules 2024; 29:628. [PMID: 38338371 PMCID: PMC10856756 DOI: 10.3390/molecules29030628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 01/19/2024] [Accepted: 01/21/2024] [Indexed: 02/12/2024] Open
Abstract
This work presents a framework for evaluating hybrid nanoflowers using Burkholderia cepacia lipase. It was expanded on previous findings by testing lipase hybrid nanoflowers (hNF-lipase) formation over a wide range of pH values (5-9) and buffer concentrations (10-100 mM). The free enzyme activity was compared with that of hNF-lipase. The analysis, performed by molecular docking, described the effect of lipase interaction with copper ions. The morphological characterization of hNF-lipase was performed using scanning electron microscopy. Fourier Transform Infrared Spectroscopy performed the physical-chemical characterization. The results show that all hNF-lipase activity presented values higher than that of the free enzyme. Activity is higher at pH 7.4 and has the highest buffer concentration of 100 mM. Molecular docking analysis has been used to understand the effect of enzyme protonation on hNF-lipase formation and identify the main the main binding sites of the enzyme with copper ions. The hNF-lipase nanostructures show the shape of flowers in their micrographs from pH 6 to 8. The spectra of the nanoflowers present peaks typical of the amide regions I and II, current in lipase, and areas with P-O vibrations, confirming the presence of the phosphate group. Therefore, hNF-lipase is an efficient biocatalyst with increased catalytic activity, good nanostructure formation, and improved stability.
Collapse
Affiliation(s)
- Danivia Endi S. Souza
- Postgraduate Program Process Engineering, Tiradentes University (UNIT), Campus Farolandia, Aracaju 49032-490, Sergipe, Brazil; (D.E.S.S.); (L.C.d.A.); (J.C.B.S.); (R.L.d.S.)
| | - Lucas M. F. Santos
- Postgraduate Program Process Engineering, Tiradentes University (UNIT), Campus Farolandia, Aracaju 49032-490, Sergipe, Brazil; (D.E.S.S.); (L.C.d.A.); (J.C.B.S.); (R.L.d.S.)
| | - João P. A. Freitas
- Postgraduate Program Process Engineering, Tiradentes University (UNIT), Campus Farolandia, Aracaju 49032-490, Sergipe, Brazil; (D.E.S.S.); (L.C.d.A.); (J.C.B.S.); (R.L.d.S.)
| | - Lays C. de Almeida
- Postgraduate Program Process Engineering, Tiradentes University (UNIT), Campus Farolandia, Aracaju 49032-490, Sergipe, Brazil; (D.E.S.S.); (L.C.d.A.); (J.C.B.S.); (R.L.d.S.)
| | - Jefferson C. B. Santos
- Postgraduate Program Process Engineering, Tiradentes University (UNIT), Campus Farolandia, Aracaju 49032-490, Sergipe, Brazil; (D.E.S.S.); (L.C.d.A.); (J.C.B.S.); (R.L.d.S.)
| | - Ranyere Lucena de Souza
- Postgraduate Program Process Engineering, Tiradentes University (UNIT), Campus Farolandia, Aracaju 49032-490, Sergipe, Brazil; (D.E.S.S.); (L.C.d.A.); (J.C.B.S.); (R.L.d.S.)
- Institute of Technology and Research (ITP), Aracaju 49032-490, Sergipe, Brazil
| | - Matheus M. Pereira
- Department of Chemical Engineering, University of Coimbra, CIEPQPF, 3030-790 Coimbra, Portugal
| | - Álvaro S. Lima
- Postgraduate Program Chemical Engineering, Federal University of Bahia (UFBA), Campus Federação, Salvador 40210-630, Bahia, Brazil;
| | - Cleide M. F. Soares
- Postgraduate Program Process Engineering, Tiradentes University (UNIT), Campus Farolandia, Aracaju 49032-490, Sergipe, Brazil; (D.E.S.S.); (L.C.d.A.); (J.C.B.S.); (R.L.d.S.)
- Institute of Technology and Research (ITP), Aracaju 49032-490, Sergipe, Brazil
| |
Collapse
|
3
|
Souza-Gonçalves J, Fialho A, Soares CMF, Osório NM, Ferreira-Dias S. Continuous Production of Dietetic Structured Lipids Using Crude Acidic Olive Pomace Oils. Molecules 2023; 28:molecules28062637. [PMID: 36985609 PMCID: PMC10054457 DOI: 10.3390/molecules28062637] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/03/2023] [Accepted: 03/07/2023] [Indexed: 03/15/2023] Open
Abstract
Crude olive pomace oil (OPO) is a by-product of olive oil extraction. In this study, low-calorie structured triacylglycerols (TAGs) were produced by acidolysis of crude OPO with medium-chain fatty acids (caprylic, C8:0; capric, C10:0) or interesterification with their ethyl ester forms (C8EE, C10EE). These new TAGs present long-chain fatty acids (L) at position sn-2 and medium-chain fatty acids (M) at positions sn-1,3 (MLM). Crude OPO exhibited a high acidity (12.05–28.75% free fatty acids), and high contents of chlorophylls and oxidation products. Reactions were carried out continuously in a packed-bed bioreactor for 70 h, using sn-1,3 regioselective commercial immobilized lipases (Thermomyces lanuginosus lipase, Lipozyme TL IM; and Rhizomucor miehei lipase, Lipozyme RM IM), in solvent-free media at 40 °C. Lipozyme RM IM presented a higher affinity for C10:0 and C10EE. Lipozyme TL IM preferred C10:0 over C8:0 but C8EE over C10EE. Both biocatalysts showed a high activity and operational stability and were not affected by OPO acidity. The New TAG yields ranged 30–60 and the specific productivity ranged 0.96–1.87 g NewTAG/h.g biocatalyst. Lipozyme RM IM cost is more than seven-fold the Lipozyme TL IM cost. Therefore, using Lipozyme TL IM and crude acidic OPO in a continuous bioreactor will contribute to process sustainability for structured lipid production by lowering the cost of the biocatalyst and avoiding oil refining.
Collapse
Affiliation(s)
- Joana Souza-Gonçalves
- Instituto Superior de Agronomia, Universidade de Lisboa, LEAF—Linking Landscape, Environment, Agriculture and Food—Research Center, Associated Laboratory TERRA, 1349-017 Lisbon, Portugal
- Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - Arsénio Fialho
- Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
- iBB—Institute for Bioengineering and Biosciences and i4HB—Institute for Health and Bioeconomy, Instituto Superior Técnico, 1049-001 Lisbon, Portugal
| | - Cleide M. F. Soares
- Institute of Technology and Research (ITP), Avenida Murilo Dantas 300—Farolandia, Aracaju 49032-490, Brazil
- Tiradentes University (UNIT), Avenida Murilo Dantas 300—Farolandia, Aracaju 49032-490, Brazil
| | - Natália M. Osório
- Instituto Politécnico de Setúbal, Escola Superior de Tecnologia do Barreiro, 2839-001 Lavradio, Portugal
- Instituto Superior de Agronomia, Universidade de Lisboa, Centro de Estudos Florestais, Associated Laboratory TERRA, 1349-017 Lisbon, Portugal
| | - Suzana Ferreira-Dias
- Instituto Superior de Agronomia, Universidade de Lisboa, LEAF—Linking Landscape, Environment, Agriculture and Food—Research Center, Associated Laboratory TERRA, 1349-017 Lisbon, Portugal
- Instituto Superior de Agronomia, Universidade de Lisboa, Laboratório de Estudos Técnicos, 1349-017 Lisbon, Portugal
- Correspondence:
| |
Collapse
|
4
|
Cambraia MVS, Barbosa MS, Soares CMF, Carvalho AKF, Mendes AA. Process optimization for enzymatic production of a valuable biomass-based ester from levulinic acid. Bioprocess Biosyst Eng 2023; 46:53-67. [PMID: 36409316 DOI: 10.1007/s00449-022-02813-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 11/09/2022] [Indexed: 11/22/2022]
Abstract
The enzymatic production of isoamyl levulinate via esterification of isoamyl alcohol (IA) and levulinic acid (LA), a biomass-based platform chemical with attractive properties, in a solvent system has been performed in this study. For such a purpose, a low-cost liquid lipase (Eversa® Transform 2.0) immobilized by physical adsorption via hydrophobic interactions (mechanism of interfacial activation) on mesoporous poly(styrenene-divinylbenzene) (PSty-DVB) beads was used as heterogeneous biocatalyst. It was prepared at low ionic strength (5 mmol.L-1 buffer sodium acetate pH 5.0) and 25 ℃ using an initial protein loading of 40 mg.g-1 of support. Maximum protein loading of 31.2 ± 2.8 mg.g-1 of support and an immobilization yield of 83% was achieved. The influence of relevant factors (biocatalyst concentration and reaction temperature) on ester production was investigated using a central composite rotatable design (CCRD). Maximum acid conversion percentage of 65% was achieved after 12 h of reaction at 40 °C, 20% of mass of heterogeneous biocatalyst per mass of reaction mixture (20% m.m-1), and LA:IA molar ratio of 1:1.5 in a methyl isobutyl ketone (MIBK) medium. The biocatalyst retained around of 30% of its initial activity after five consecutive esterification batches under optimal experimental conditions. The proposed experimental procedure can be considered as an acceptable green process (EcoScale score of 66.5), in addition to the fact that a new strategy is proposed to sustainably produce a valuable industrial ester (isoamyl levulinate) from biomass-based materials using an immobilized and low-cost commercial lipase as catalyst.
Collapse
Affiliation(s)
- Marcus V S Cambraia
- Graduate Program in Biotechnology, Federal University of Alfenas, Alfenas, MG, 37130-001, Brazil.,Institute of Chemistry, Federal University of Alfenas, Alfenas, MG, 37130-001, Brazil
| | - Milson S Barbosa
- Tiradentes University, Av. Murilo Dantas 300, Farolândia, Aracaju, Sergipe, 49032-490, Brazil.,Institute of Technology and Research, Av. Murilo Dantas 300, Farolândia, Aracaju, Sergipe, 49032-490, Brazil
| | - Cleide M F Soares
- Tiradentes University, Av. Murilo Dantas 300, Farolândia, Aracaju, Sergipe, 49032-490, Brazil.,Institute of Technology and Research, Av. Murilo Dantas 300, Farolândia, Aracaju, Sergipe, 49032-490, Brazil
| | - Ana K F Carvalho
- Graduate Program in Biotechnology, Federal University of Alfenas, Alfenas, MG, 37130-001, Brazil.,Institute of Chemistry, Federal University of Alfenas, Alfenas, MG, 37130-001, Brazil
| | - Adriano A Mendes
- Graduate Program in Biotechnology, Federal University of Alfenas, Alfenas, MG, 37130-001, Brazil. .,Institute of Chemistry, Federal University of Alfenas, Alfenas, MG, 37130-001, Brazil.
| |
Collapse
|
5
|
Mendes AA, Soares CMF, Tardioli PW. Recent advances and future prospects for biolubricant base stocks production using lipases as environmentally friendly catalysts: a mini-review. World J Microbiol Biotechnol 2022; 39:25. [PMID: 36422728 DOI: 10.1007/s11274-022-03465-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 11/08/2022] [Indexed: 11/26/2022]
Abstract
In recent years, fluctuating global fossil fuel market prices and growing concern about environmental pollution have increased efforts to obtain novel value-added products from renewable agricultural biomass. To this end, a wide variety of triacylglycerols (edible and non-edible oils and fats) and their derivatives (free fatty acids or monoalkyl esters) stand out as promising feedstocks for the production of biolubricant base stocks, due to their biodegradability, excellent physicochemical properties, and sustainable nature. These raw materials can be transformed into biolubricants using chemical or biochemical (lipases) catalysts, with the enzymatic production of biolubricants using lipases as catalysts being recognized as an environmentally friendly approach. The present mini-review highlights recent advances in this field, published in the last three years. The different chemical modification processes used to develop a wide variety of industrial biolubricant base stocks are comprehensively reviewed, with exploration of future prospects for industrial production via the enzymatic route. This study contributes to the current state-of-the-art, identifying relevant research questions and providing important technical information for new applications of lipases in oleochemical manufacturing industries.
Collapse
Affiliation(s)
- Adriano A Mendes
- Institute of Chemistry, Federal University of Alfenas, Alfenas, MG, 37130-001, Brazil.
| | - Cleide M F Soares
- Tiradentes University, Aracaju, Sergipe, 49032-490, Brazil.,Institute of Technology and Research, Aracaju, Sergipe, 49032-490, Brazil
| | - Paulo W Tardioli
- Graduate Program of Chemical Engineering (PPGEQ), Federal University of São Carlos, São Carlos, SP, 13565-905, Brazil
| |
Collapse
|
6
|
da Silva ARC, Calazans Soares LR, Lima ÁS, Soares CMF, Lucena de Souza R. Strategies to reuse of biocatalysts in the hydrolysis and esterification reactions from licuri (Syagrus coronata (Mart.) Becc.) oil. ChemCatChem 2022. [DOI: 10.1002/cctc.202200448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Alan R. C. da Silva
- Tiradentes University: Universidade Tiradentes Engenharia de Processos BRAZIL
| | | | - Álvaro S. Lima
- Tiradentes University: Universidade Tiradentes Engenharia de Processos BRAZIL
| | - Cleide M. F. Soares
- Tiradentes University: Universidade Tiradentes Engenharia de Processos BRAZIL
| | - Ranyere Lucena de Souza
- Tiradentes University: Universidade Tiradentes Programa de Pós-Graduação em Engenharia de Processos Av. Murilo Dantas, N 300 49032490 Aracaju BRAZIL
| |
Collapse
|
7
|
Heinzl GC, Mota DA, Martinis V, Martins AS, Soares CMF, Osório N, Gominho J, Madhavan Nampoothiri K, Sukumaran RK, Pereira H, Ferreira-Dias S. Integrated bioprocess for structured lipids, emulsifiers and biodiesel production using crude acidic olive pomace oils. Bioresour Technol 2022; 346:126646. [PMID: 34974092 DOI: 10.1016/j.biortech.2021.126646] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/23/2021] [Accepted: 12/24/2021] [Indexed: 06/14/2023]
Abstract
Olive pomace oil (OPO), a by-product of olive oil industry, is directly consumed after refining. The novelty of this study consists of the direct use of crude high acidic OPO (3.4-20% acidity) to produce added-value compounds, using sn-1,3-regioselective lipases: (i) low-calorie dietetic structured lipids (SL) containing caprylic (C8:0) or capric (C10:0) acids by acidolysis or interesterification with their ethyl esters, (ii) fatty acid methyl esters (FAME) for biodiesel, and (iii) sn-2 monoacylglycerols (emulsifiers), as by-product of FAME production by methanolysis. Immobilized Rhizomucor miehei lipase showed similar activity in acidolysis and interesterification for SL production (yields: 47.8-53.4%, 7 h, 50℃) and was not affected by OPO acidity. Batch operational stability decreased with OPO acidity, but it was at least three-fold in interesterification that in acidolysis. Complete conversion of OPO into FAME and sn-2 monoacylglycerols was observed after 3 h-transesterification (glycerol stepwise addition) and lipase deactivation was negligeable after 11 cycles.
Collapse
Affiliation(s)
- Giuditta C Heinzl
- Instituto Superior de Agronomia, Universidade de Lisboa, LEAF - Linking Landscape, Environment, Agriculture and Food-Research Center, Associated Laboratory TERRA, Lisbon, Portugal
| | - Danyelle A Mota
- Instituto Superior de Agronomia, Universidade de Lisboa, LEAF - Linking Landscape, Environment, Agriculture and Food-Research Center, Associated Laboratory TERRA, Lisbon, Portugal; Institute of Technology and Research (ITP), Avenida Murilo Dantas 300 - Farolândia, Aracaju, Brazil; Tiradentes University (UNIT), Avenida Murilo Dantas 300 - Farolândia, Aracaju, Brazil
| | - Valentina Martinis
- Instituto Superior de Agronomia, Universidade de Lisboa, LEAF - Linking Landscape, Environment, Agriculture and Food-Research Center, Associated Laboratory TERRA, Lisbon, Portugal
| | - Ana Sofia Martins
- Instituto Superior de Agronomia, Universidade de Lisboa, LEAF - Linking Landscape, Environment, Agriculture and Food-Research Center, Associated Laboratory TERRA, Lisbon, Portugal
| | - Cleide M F Soares
- Institute of Technology and Research (ITP), Avenida Murilo Dantas 300 - Farolândia, Aracaju, Brazil; Tiradentes University (UNIT), Avenida Murilo Dantas 300 - Farolândia, Aracaju, Brazil
| | - Natália Osório
- Instituto Politécnico de Setúbal, Escola Superior de Tecnologia do Barreiro, Lavradio, Portugal; Instituto Superior de Agronomia, Universidade de Lisboa, Centro de Estudos Florestais, Associated Laboratory TERRA, Lisbon, Portugal
| | - Jorge Gominho
- Instituto Superior de Agronomia, Universidade de Lisboa, Centro de Estudos Florestais, Associated Laboratory TERRA, Lisbon, Portugal
| | - K Madhavan Nampoothiri
- Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Trivandrum, Kerala, India
| | - Rajeev K Sukumaran
- Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Trivandrum, Kerala, India
| | - Helena Pereira
- Instituto Superior de Agronomia, Universidade de Lisboa, Centro de Estudos Florestais, Associated Laboratory TERRA, Lisbon, Portugal
| | - Suzana Ferreira-Dias
- Instituto Superior de Agronomia, Universidade de Lisboa, LEAF - Linking Landscape, Environment, Agriculture and Food-Research Center, Associated Laboratory TERRA, Lisbon, Portugal.
| |
Collapse
|
8
|
Brandão LMDS, Barbosa MS, Souza RL, Pereira MM, Lima ÁS, Soares CMF. Lipase activation by molecular bioimprinting: The role of interactions between fatty acids and enzyme active site. Biotechnol Prog 2020; 37:e3064. [PMID: 32776684 DOI: 10.1002/btpr.3064] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/21/2020] [Accepted: 08/07/2020] [Indexed: 01/06/2023]
Abstract
Bioimprinting is an easy, sustainable and low-cost technique that promotes a printing of potential substrates on enzyme structure, inducing a more selective and stable conformation. Bioimprinting promotes conformational changes in enzymes, resulting in better catalytic performance. In this work, the effect of bioimprinting of Burkholderia cepacia lipase (BCL) and porcine pancreatic extracts (PPE) with four different fatty acids (lauric acid (C12:0), myristic acid (C14:0), palmitic acid (C16:0), and stearic acid (C18:0)) was investigated. The results demonstrated that the better bioimprinting effect was in BCL with lauric acid in esterification reaction, promoting BCL activation in which relative enzyme activity was 70 times greater than nonimprinted BCL. Bioimprinting results were influenced by the carbon chain length of fatty acids imprinted in the BCL, in which the effects were weaker with the chain increase. Molecular docking was performed to better understand the bioimprinting method. The results of these simulations showed that indeed all fatty acids were imprinted in the active site of BCL. However, lauric acid presented the highest imprinting preference in the active site of BCL, resulting in the highest relative activity. Furthermore, Fourier transform infrared (FTIR) analysis confirmed important variations in secondary structure of bioimprinting BCL with lauric acid, in which there was a reduction in the α-helix content and an increase in the β-sheet content that facilitated substrate access to the active site of BCL and led higher rigidity, resulting in high activity. Bioimprinted BCL with lauric acid showed excellent operational stability in esterification reaction, maintaining its original relative activity after five successive cycles. Thus, the results show that bioimprinting of BCL with lauric acid is a successful strategy due to its high catalytic activity and reusability.
Collapse
Affiliation(s)
| | | | - Ranyere L Souza
- Universidade Tiradentes, Aracaju, Sergipe, Brazil.,Instituto de Tecnologia e Pesquisa, Aracaju, Sergipe, Brazil
| | - Matheus M Pereira
- CICECO - Instituto de Materiais de Aveiro, Departamento de Química, Universidade de Aveiro, Aveiro, Portugal
| | - Álvaro S Lima
- Universidade Tiradentes, Aracaju, Sergipe, Brazil.,Instituto de Tecnologia e Pesquisa, Aracaju, Sergipe, Brazil
| | - Cleide M F Soares
- Universidade Tiradentes, Aracaju, Sergipe, Brazil.,Instituto de Tecnologia e Pesquisa, Aracaju, Sergipe, Brazil
| |
Collapse
|
9
|
Almeida LC, Barbosa MS, de Jesus FA, Santos RM, Fricks AT, Freitas LS, Pereira MM, Lima ÁS, Soares CMF. Enzymatic transesterification of coconut oil by using immobilized lipase on biochar: An experimental and molecular docking study. Biotechnol Appl Biochem 2020; 68:801-808. [PMID: 33180374 DOI: 10.1002/bab.1992] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 07/18/2020] [Indexed: 12/13/2022]
Abstract
Guava seed biochar appears as a new alternative of the effective support to the immobilization of Burkholderia cepacia lipase (BCL) by physical adsorption. The objective of this work was to evaluate the potential of this immobilized biocatalyst in the transesterification reaction of crude coconut oil and ethanol and to understand the mechanism of the reaction through the study of molecular docking. The best loading of BCL was determined to be 0.15 genzyme /gsupport having a hydrolytic activity of 260 U/g and 54% immobilization yield. The products of transesterification reaction produced a maximum yield at 40 °C under different reaction conditions. The monoacylglycerols (MAGs) conversion of 59% was using substrate molar ratio oil:ethanol of 1:7 with the reaction time of 24 H. In addition, the highest ethyl esters yield (48%) had the molar ratio of 1:7 with the reaction time of 96 H and maximum conversion of diacylglycerols (DAGs) was 30% with the molar ratio of 1:6 with the reaction time of 24 H. Molecular Docking was applied to clarify the mechanisms of transesterification reaction at the molecular level. MAGs and DAGs are compounds with excellent emulsifying properties used in industrial production of several bioproducts such as cosmetic, pharmaceuticals, foods, and lubricants.
Collapse
Affiliation(s)
| | | | | | - Roberta M Santos
- Departamento de Química, Universidade Federal de Sergipe, São Cristóvão, SE, Brazil
| | - Alini T Fricks
- Universidade Tiradentes, Aracaju, SE, Brazil.,Instituto de Tecnologia e Pesquisa, Aracaju, SE, Brazil
| | - Lisiane S Freitas
- Departamento de Química, Universidade Federal de Sergipe, São Cristóvão, SE, Brazil
| | - Matheus M Pereira
- Chemistry Department, CICECO - Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
| | - Álvaro S Lima
- Universidade Tiradentes, Aracaju, SE, Brazil.,Instituto de Tecnologia e Pesquisa, Aracaju, SE, Brazil
| | - Cleide M F Soares
- Universidade Tiradentes, Aracaju, SE, Brazil.,Instituto de Tecnologia e Pesquisa, Aracaju, SE, Brazil
| |
Collapse
|
10
|
Alves NR, Pereira MM, Giordano RLC, Tardioli PW, Lima ÁS, Soares CMF, Souza RL. Design for preparation of more active cross-linked enzyme aggregates of Burkholderia cepacia lipase using palm fiber residue. Bioprocess Biosyst Eng 2020; 44:57-66. [PMID: 32767112 DOI: 10.1007/s00449-020-02419-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 07/29/2020] [Indexed: 01/18/2023]
Abstract
A new design of cross-linked enzyme aggregates (CLEAs) of Burkholderia cepacia lipase (BCL) based mainly on the use of lignocellulosic residue of palm fiber as an additive was proposed. Different parameters for the preparation of active CLEAs in the hydrolysis of olive oil, such as precipitation agents, crosslinking agent concentration, additives, and coating agents were investigated. The highest activity yield (121.1 ± 0.1%) and volumetric activity (1578.1 ± 2.5 U/mL) were achieved for CLEAs prepared using the combination of a coating step with Triton® X-100 and polyethyleneimine plus the use of palm fiber as an additive. The variations of the secondary structures of BCL-CLEAs were analyzed by second-derivative infrared spectra, mainly indicating a reduction of the α-helix structure, which was responsible for the lipase activation in the supramolecular structure of the CLEAs. Thus, these results provided evidence of an innovative design of BCL-CLEAs as a sustainable and biocompatible opportunity for biotechnology applications.
Collapse
Affiliation(s)
- Nanda R Alves
- UNIT, Universidade Tiradentes, Av. Murilo Dantas, 300, Farolândia, Aracaju, SE, Brazil
| | - Matheus M Pereira
- Chemistry Department, CICECO, University of Aveiro, Campus Universitário de Santiago Aveiro, 3810-193, Aveiro, Portugal
| | - Raquel L C Giordano
- Programa de Pós-Graduação Em Engenharia Química (PPG-EQ), Departamento de Engenharia Química, Universidade Federal de São Carlos (DEQ/UFSCar), Rodovia Washington Luís, Km 235, São Carlos, SP, 13565-905, Brazil
| | - Paulo W Tardioli
- Programa de Pós-Graduação Em Engenharia Química (PPG-EQ), Departamento de Engenharia Química, Universidade Federal de São Carlos (DEQ/UFSCar), Rodovia Washington Luís, Km 235, São Carlos, SP, 13565-905, Brazil
| | - Álvaro S Lima
- UNIT, Universidade Tiradentes, Av. Murilo Dantas, 300, Farolândia, Aracaju, SE, Brazil.,ITP, Instituto de Tecnologia E Pesquisa, Av. Murilo Dantas, 300, ITP, Farolândia, Aracaju, SE, Brazil
| | - Cleide M F Soares
- UNIT, Universidade Tiradentes, Av. Murilo Dantas, 300, Farolândia, Aracaju, SE, Brazil.,ITP, Instituto de Tecnologia E Pesquisa, Av. Murilo Dantas, 300, ITP, Farolândia, Aracaju, SE, Brazil
| | - Ranyere L Souza
- UNIT, Universidade Tiradentes, Av. Murilo Dantas, 300, Farolândia, Aracaju, SE, Brazil. .,ITP, Instituto de Tecnologia E Pesquisa, Av. Murilo Dantas, 300, ITP, Farolândia, Aracaju, SE, Brazil.
| |
Collapse
|
11
|
Mota DA, Rajan D, Heinzl GC, Osório NM, Gominho J, Krause LC, Soares CMF, Nampoothiri KM, Sukumaran RK, Ferreira-Dias S. Production of low-calorie structured lipids from spent coffee grounds or olive pomace crude oils catalyzed by immobilized lipase in magnetic nanoparticles. Bioresour Technol 2020; 307:123223. [PMID: 32220818 DOI: 10.1016/j.biortech.2020.123223] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 03/15/2020] [Accepted: 03/17/2020] [Indexed: 06/10/2023]
Abstract
In this study, crude oils extracted from spent coffee grounds (SCG) and olive pomace (OP) were used as raw-material to synthesize low-calorie triacylglycerols, either by acidolysis with capric acid, or by interesterification with ethyl caprate, in solvent-free media, catalyzed by sn-1,3 regioselective lipases. The Rhizopus oryzae lipase (ROL) was immobilized in magnetite nanoparticles (MNP-ROL) and tested as novel biocatalyst. MNP-ROL performance was compared with that of the commercial immobilized Thermomyces lanuginosus lipase (Lipozyme TL IM). For both oils, Lipozyme TL IM preferred interesterification over acidolysis. MNP-ROL catalyzed reactions were faster and acidolysis was preferred with yields of c.a. 50% new triacylglycerols after 3 h acidolysis of OP or SCG oils. MNP-ROL was very stable following the Sadana deactivation model with half-lives of 163 h and 220 h when reused in batch acidolysis and interesterification of OP oil, respectively.
Collapse
Affiliation(s)
- Danyelle A Mota
- Instituto Superior de Agronomia, Universidade de Lisboa, LEAF, Linking Landscape, Environment, Agriculture and Food, Lisbon, Portugal; Institute of Technology and Research (ITP), Avenida Murilo Dantas 300 - Farolândia, Aracaju, Brazil; Tiradentes University (UNIT), Avenida Murilo Dantas 300 - Farolândia, Aracaju, Brazil
| | - Devi Rajan
- Instituto Superior de Agronomia, Universidade de Lisboa, LEAF, Linking Landscape, Environment, Agriculture and Food, Lisbon, Portugal; Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Trivandrum, Kerala, India
| | - Giuditta C Heinzl
- Instituto Superior de Agronomia, Universidade de Lisboa, LEAF, Linking Landscape, Environment, Agriculture and Food, Lisbon, Portugal
| | - Natália M Osório
- Instituto Politécnico de Setúbal, Escola Superior de Tecnologia do Barreiro, Lavradio, Portugal
| | - Jorge Gominho
- Instituto Superior de Agronomia, Universidade de Lisboa, Centro de Estudos Florestais, Lisbon, Portugal
| | - Laiza C Krause
- Institute of Technology and Research (ITP), Avenida Murilo Dantas 300 - Farolândia, Aracaju, Brazil; Tiradentes University (UNIT), Avenida Murilo Dantas 300 - Farolândia, Aracaju, Brazil
| | - Cleide M F Soares
- Institute of Technology and Research (ITP), Avenida Murilo Dantas 300 - Farolândia, Aracaju, Brazil; Tiradentes University (UNIT), Avenida Murilo Dantas 300 - Farolândia, Aracaju, Brazil
| | - K Madhavan Nampoothiri
- Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Trivandrum, Kerala, India
| | - Rajeev K Sukumaran
- Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Trivandrum, Kerala, India
| | - Suzana Ferreira-Dias
- Instituto Superior de Agronomia, Universidade de Lisboa, LEAF, Linking Landscape, Environment, Agriculture and Food, Lisbon, Portugal.
| |
Collapse
|
12
|
Santana JL, Oliveira JM, Nascimento JS, Mattedi S, Krause LC, Freitas LS, Cavalcanti EB, Pereira MM, Lima ÁS, Soares CMF. Continuous flow reactor based with an immobilized biocatalyst for the continuous enzymatic transesterification of crude coconut oil. Biotechnol Appl Biochem 2020; 67:404-413. [PMID: 31930535 DOI: 10.1002/bab.1885] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 12/30/2019] [Indexed: 11/06/2022]
Abstract
Here, we have assessed the use of one packed bed or two packed bed reactors in series in which Burkholderia cepacia lipase (BCL) was immobilized on protic ionic liquid (PIL)-modified silica and used as a biocatalyst for the transesterification of crude coconut oil. Reaction parameters including volumetric flow, temperature, and molar ratio were evaluated. The conversion of transesterification reaction products (ethyl esters) was determined using gas chromatography and the quantities of intermediate products (diglyceride and monoglyceride [MG]) were assessed using high-performance liquid chromatography. Packed bed reactors in series produced ethyl esters with the greatest efficiency, achieving 65.27% conversion after 96 H at a volumetric flow rate of 0.50 mL Min-1 at 40 °C and a 1:9 molar ratio of oil to ethanol. Further, within the first 24 H of the reaction, increased MG (54.5%) production was observed. Molecular docking analyses were performed to evaluate the catalytic step of coconut oil transesterification in the presence of BCL. Molecular docking analysis showed that triglycerides have a higher affinity energy (-5.7 kcal mol-1 ) than the smallest MG (-6.0 kcal mol-1 ), therefore, BCL catalyzes the conversion of triglycerides rather than MG, which is consistent with experimental results.
Collapse
Affiliation(s)
- Juliana L Santana
- Instituto de Tecnologia e Pesquisa-ITP, Universidade Tiradentes, Aracaju, SE, Brazil
| | - Juliana M Oliveira
- Instituto de Tecnologia e Pesquisa-ITP, Universidade Tiradentes, Aracaju, SE, Brazil
| | - Jamily S Nascimento
- Instituto de Tecnologia e Pesquisa-ITP, Universidade Tiradentes, Aracaju, SE, Brazil
| | - Silvana Mattedi
- Departamento de Engenharia Química, Universidade Federal da Bahia, Salvador, BA, Brazil
| | - Laiza C Krause
- Núcleo de Estudo em Sistemas Coloidais-NUESC, Universidade Tiradentes, Aracaju, SE, Brazil
| | - Lisiane S Freitas
- Departamento de Química, Universidade Federal de Sergipe, São Cristóvão, Sergipe, SE, Brazil
| | - Eliane B Cavalcanti
- Instituto de Tecnologia e Pesquisa-ITP, Universidade Tiradentes, Aracaju, SE, Brazil
| | - Matheus M Pereira
- CICECO, Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, Aveiro, Portugal
| | - Álvaro S Lima
- Instituto de Tecnologia e Pesquisa-ITP, Universidade Tiradentes, Aracaju, SE, Brazil
| | - Cleide M F Soares
- Instituto de Tecnologia e Pesquisa-ITP, Universidade Tiradentes, Aracaju, SE, Brazil
| |
Collapse
|
13
|
Barbosa MS, Freire CCC, Almeida LC, Freitas LS, Souza RL, Pereira EB, Mendes AA, Pereira MM, Lima ÁS, Soares CMF. Optimization of the enzymatic hydrolysis ofMoringa oleiferaLam oil using molecular docking analysis for fatty acid specificity. Biotechnol Appl Biochem 2019; 66:823-832. [DOI: 10.1002/bab.1793] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 06/10/2019] [Indexed: 12/13/2022]
Affiliation(s)
| | | | | | - Lisiane S. Freitas
- Departamento de Química Universidade Federal de Sergipe São Cristóvão SE Brazil
| | - Ranyere L. Souza
- Universidade Tiradentes Aracaju SE Brazil
- Instituto de Tecnologia e Pesquisa Aracaju SE Brazil
| | - Ernandes B. Pereira
- Faculdade de Ciências Farmacêuticas Universidade Federal de Alfenas Alfenas MG Brazil
| | - Adriano A. Mendes
- Instituto de Química Universidade Federal de Alfenas Alfenas MG Brazil
| | | | - Álvaro S. Lima
- Universidade Tiradentes Aracaju SE Brazil
- Instituto de Tecnologia e Pesquisa Aracaju SE Brazil
| | - Cleide M. F. Soares
- Universidade Tiradentes Aracaju SE Brazil
- Instituto de Tecnologia e Pesquisa Aracaju SE Brazil
| |
Collapse
|
14
|
Barbosa MS, Freire CCC, Souza RL, Cabrera‐Padilla RY, Pereira MM, Freire MG, Lima ÁS, Soares CMF. Effects of phosphonium‐based ionic liquids on the lipase activity evaluated by experimental results and molecular docking. Biotechnol Prog 2019; 35:e2816. [DOI: 10.1002/btpr.2816] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 03/19/2019] [Accepted: 03/27/2019] [Indexed: 12/11/2022]
Affiliation(s)
| | | | - Ranyere L. Souza
- Universidade Tiradentes Aracaju Sergipe Brazil
- Instituto de Tecnologia e Pesquisa Aracaju Sergipe Brazil
| | - Rebeca Y. Cabrera‐Padilla
- Universidade Tiradentes Aracaju Sergipe Brazil
- Instituto de Tecnologia e Pesquisa Aracaju Sergipe Brazil
| | - Matheus M. Pereira
- Universidade Tiradentes Aracaju Sergipe Brazil
- Instituto de Tecnologia e Pesquisa Aracaju Sergipe Brazil
| | - Mara G. Freire
- Departamento de QuímicaUniversidade de Aveiro, CICECO – Instituto de Materiais de Aveiro Aveiro Portugal
| | - Álvaro S. Lima
- Universidade Tiradentes Aracaju Sergipe Brazil
- Instituto de Tecnologia e Pesquisa Aracaju Sergipe Brazil
| | - Cleide M. F. Soares
- Universidade Tiradentes Aracaju Sergipe Brazil
- Instituto de Tecnologia e Pesquisa Aracaju Sergipe Brazil
| |
Collapse
|
15
|
Santos RP, Souza LM, Balieiro AL, Soares CMF, Lima ÁS, Souza RL. Integrated process of extraction and purification of betanin from Opuntia ficus-indica using aqueous two-phase systems based on THF and sodium salts. SEP SCI TECHNOL 2017. [DOI: 10.1080/01496395.2017.1397022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
| | - Luana M. Souza
- Universidade Tiradentes, Process Engineering, Aracaju SE, Brazil
| | | | - Cleide M. F. Soares
- Universidade Tiradentes, Process Engineering, Aracaju SE, Brazil
- Instituto de Tecnologia e Pesquisa - ITP/LPA, Aracaju SE, Brazil
| | - Álvaro S. Lima
- Universidade Tiradentes, Process Engineering, Aracaju SE, Brazil
- Instituto de Tecnologia e Pesquisa - ITP/LPA, Aracaju SE, Brazil
| | - Ranyere L. Souza
- Universidade Tiradentes, Process Engineering, Aracaju SE, Brazil
- Instituto de Tecnologia e Pesquisa - ITP/LPA, Aracaju SE, Brazil
| |
Collapse
|
16
|
Perna RF, Tiosso PC, Sgobi LM, Vieira AMS, Vieira MF, Tardioli PW, Soares CMF, Zanin GM. Effects of Triton X-100 and PEG on the Catalytic Properties and Thermal Stability of Lipase from Candida Rugosa Free and Immobilized on Glyoxyl-Agarose. Open Biochem J 2017; 11:66-76. [PMID: 29290831 PMCID: PMC5721316 DOI: 10.2174/1874091x01711010066] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 06/07/2017] [Accepted: 06/23/2017] [Indexed: 11/22/2022] Open
Abstract
Background Candida rugosa Lipase (CRL) shows a very low alkaline stability that comprises its immobilization on glyoxyl-agarose, which requires pH above 10. In this way, an adaptation from the original method was used; an enzyme solution at pH 7 was slowly added at a suspension of glyoxyl-agarose prepared in bicarbonate buffer, pH 10. This change of protocol was enough for allowing the preparation of derivatives actives of CRL on glyoxyl-agarose and verifying the effect of this modified procedure on the properties of the immobilized enzyme. The effect of the additives Triton-X-100 and polyethylene glycol (PEG) on the enzymatic activity recovery and immobilized enzyme stability was evaluated. Methods The glyoxyl-agarose support was prepared by etherification of 6% agarose beads with glycidol and further oxidation with sodium periodate. CRL was immobilized covalently on glyoxyl-agarose support in the absence and presence of 1% (w/v) Triton-X-100 or 5 g L-1 polyethylene glycol (PEG). The lipolysis activity of the free and immobilized enzyme was determined at 37ºC and pH 7.0, using p-nitrophenyl palmitate (p-NPP) as substrate. Profiles of temperature-activity (37-65ºC, pH 7.0) and pH-activity (6.0-9.5, 37ºC) were evaluated as well as thermal (45ºC and pH 8.0) and operational (15 min batches of p-NPP hydrolysis at 50ºC and pH 8.0) stabilities of free and immobilized CRL. Results Using a single modification of the original protocol, the CRL poorly stable under alkaline conditions could be immobilized on glyoxyl-agarose in its active conformation (recovered activity varying from 10.3 to 30.4%). Besides, the presence of a detergent (Triton-X-100) and an enzyme stabilizer (PEG) contributed to the preparation of more active and more stable biocatalysts, respectively. CRL immobilized on glyoxyl-agarose in the presence of PEG was around 5 times more stable than the free CRL and around 3 times more stable than the CRL immobilized on glyoxyl-agarose in absence of PEG. The higher stability of the CRL-glyoxyl derivative prepared in the presence of PEG allowed its reuse in four successive 15 min-batches of p-nitrophenyl palmitate hydrolysis at 50ºC and pH 8.0. Conclusion The technique of immobilizing enzymes covalently on glyoxyl-agarose showed promising results for Candida rugosa lipase (CRL). The derivatives prepared in the presence of the additives retained two to three times more activity than those prepared in the absence of additives. The enzyme immobilized in presence of PEG was about three times more stable than the enzyme immobilized in absence of this additive. Maximum catalytic activity of the immobilized CRL (in absence of additives) was observed in a temperature 10ºC above that for the free enzyme and the pH of the maximum activity was maintained in the range 6.5-7.5 for free and immobilized CRL.
Collapse
Affiliation(s)
- Rafael F Perna
- Science and Technology Institute, Federal University of Alfenas, Rod. José Aurélio Vilela, Km 533, 11999, 37715-400 Poços de Caldas, MG, Brazil
| | - Poliana C Tiosso
- Department of Chemical Engineering, State University of Maringá, Av. Colombo, 5790, 87020-900 Maringá, PR.W, Brazil
| | - Letícia M Sgobi
- Department of Food Engineering, State University of Maringá, Av. Colombo, 5790, 87020-900 Maringá, PR.W, Brazil
| | - Angélica M S Vieira
- Department of Food Engineering, State University of Maringá, Av. Colombo, 5790, 87020-900 Maringá, PR.W, Brazil
| | - Marcelo F Vieira
- Department of Chemical Engineering, State University of Maringá, Av. Colombo, 5790, 87020-900 Maringá, PR.W, Brazil
| | - Paulo W Tardioli
- Departmet of Chemical Engineering, Federal University of São Carlos, Rod. Washington Luis, Km 235, 13565-905, São Carlos, SP, Brazil
| | - Cleide M F Soares
- Institute of Technology and Research, Tiradentes University, Av. Murilo Dantas, 300, 49032-490 Aracaju, SE, Brazil
| | - Gisella M Zanin
- Department of Chemical Engineering, State University of Maringá, Av. Colombo, 5790, 87020-900 Maringá, PR.W, Brazil
| |
Collapse
|
17
|
Santos SB, Reis IAO, Silva CPC, Campos AF, Ventura SPM, Soares CMF, Lima ÁS. Selective partition of caffeine from coffee bean and guaraná seed extracts using alcohol–salt aqueous two-phase systems. SEP SCI TECHNOL 2016. [DOI: 10.1080/01496395.2016.1199569] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Samuel B. Santos
- Programa de Pós-Graduação em Engenharia de Processos, Universidade Tiradentes, Farolândia, Aracaju-SE, Brasil
| | - Igor A. O. Reis
- Programa de Pós-Graduação em Engenharia de Processos, Universidade Tiradentes, Farolândia, Aracaju-SE, Brasil
| | - Camila P. C. Silva
- Programa de Pós-Graduação em Engenharia de Processos, Universidade Tiradentes, Farolândia, Aracaju-SE, Brasil
| | - Andressa F. Campos
- Programa de Pós-Graduação em Engenharia de Processos, Universidade Tiradentes, Farolândia, Aracaju-SE, Brasil
| | | | - Cleide M. F. Soares
- Programa de Pós-Graduação em Engenharia de Processos, Universidade Tiradentes, Farolândia, Aracaju-SE, Brasil
- Instituto de Tecnologia e Pesquisa, Av. Murilo Dantas, Aracaju, SE, Brasil
| | - Álvaro S. Lima
- Programa de Pós-Graduação em Engenharia de Processos, Universidade Tiradentes, Farolândia, Aracaju-SE, Brasil
- Instituto de Tecnologia e Pesquisa, Av. Murilo Dantas, Aracaju, SE, Brasil
| |
Collapse
|
18
|
Oliveira MVS, Vidal BT, Melo CM, de Miranda RDCM, Soares CMF, Coutinho JAP, Ventura SPM, Mattedi S, Lima ÁS. (Eco)toxicity and biodegradability of protic ionic liquids. Chemosphere 2016; 147:460-6. [PMID: 26796340 DOI: 10.1016/j.chemosphere.2015.11.016] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 11/03/2015] [Accepted: 11/04/2015] [Indexed: 05/21/2023]
Abstract
Ionic liquids (ILs) are often claimed to be "environmentally friendly" compounds however, the knowledge of their potential toxicity towards different organisms and trophic levels is still limited, in particular when protic ionic liquids (PILs) are addressed. This study aims to evaluate the toxicity against various microorganisms and the biodegradability of four PILs namely, N-methyl-2-hydroxyethylammonium acetate, m-2-HEAA; N-methyl-2-hydroxyethylammonium propionate, m-2-HEAPr; N-methyl-2-hydroxyethylammonium butyrate, m-2-HEAB; and N-methyl-2-hydroxyethylammonium pentanoate, m-2-HEAP. The antimicrobial activity was determined against the two bacteria, Sthaplylococcus aureus ATCC-6533 and Escherichia coli CCT-0355; the yeast Candida albicans ATCC-76645; and the fungi Fusarium sp. LM03. The toxicity of all PILs was tested against the aquatic luminescent marine bacterium Vibrio fischeri using the Microtox(®) test. The impact of the PILs was also studied regarding their effect on lettuce seeds (Lactuta sativa). The biodegradability of these PILs was evaluated using the ratio between the biochemical oxygen demand (BOD) and the chemical oxygen demand (COD). The results show that, in general, the elongation of the alkyl chain tends to increase the negative impact of the PILs towards the organisms and biological systems under study. According to these results, m-2-HEAA and m-2-HEAP are the less and most toxic PILs studied in this work, respectively. Additionally, all the PILs have demonstrated low biodegradability.
Collapse
Affiliation(s)
- Maria V S Oliveira
- UNIT, Universidade Tiradentes, Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju-SE, Brazil
| | - Bruna T Vidal
- UNIT, Universidade Tiradentes, Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju-SE, Brazil
| | - Claudia M Melo
- UNIT, Universidade Tiradentes, Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju-SE, Brazil; ITP, Instituto de Tecnologia e Pesquisa, Av. Murilo Dantas, 300-Prédio do ITP, Farolândia, 49032-490, Aracaju-SE, Brazil
| | - Rita de C M de Miranda
- UNIT, Universidade Tiradentes, Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju-SE, Brazil
| | - Cleide M F Soares
- UNIT, Universidade Tiradentes, Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju-SE, Brazil; ITP, Instituto de Tecnologia e Pesquisa, Av. Murilo Dantas, 300-Prédio do ITP, Farolândia, 49032-490, Aracaju-SE, Brazil
| | - João A P Coutinho
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Sónia P M Ventura
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Silvana Mattedi
- UFBA, Universidade Federal da Bahia, Escola Politécnica, Departamento de Engenharia, Rua Aristides Novis 2, Federação, 40210-630, Salvador-BA, Brazil
| | - Álvaro S Lima
- UNIT, Universidade Tiradentes, Av. Murilo Dantas, 300, Farolândia, 49032-490, Aracaju-SE, Brazil; ITP, Instituto de Tecnologia e Pesquisa, Av. Murilo Dantas, 300-Prédio do ITP, Farolândia, 49032-490, Aracaju-SE, Brazil.
| |
Collapse
|
19
|
Barbosa AS, Lisboa JA, Silva MAO, Carvalho NB, Pereira MM, Fricks AT, Mattedi S, Lima ÁS, Franceschi E, Soares CMF. THE NOVEL MESOPOROUS SILICA AEROGEL MODIFIED WITH PROTIC IONIC LIQUID FOR LIPASE IMMOBILIZATION. QUIM NOVA 2016. [DOI: 10.5935/0100-4042.20160042] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
20
|
Queiroz MLB, Boaventura RF, Melo MN, Alvarez HM, Soares CMF, Lima ÁS, Heredia MF, Dariva C, Fricks AT. MICROWAVE ACTIVATION OF IMMOBILIZED LIPASE FOR TRANSESTERIFICATION OF VEGETABLE OILS. QUIM NOVA 2015. [DOI: 10.5935/0100-4042.20150031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
21
|
Santos JH, e Silva FA, Ventura SPM, Coutinho JAP, de Souza RL, Soares CMF, Lima ÁS. Ionic liquid-based aqueous biphasic systems as a versatile tool for the recovery of antioxidant compounds. Biotechnol Prog 2014; 31:70-7. [DOI: 10.1002/btpr.2000] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 10/06/2014] [Indexed: 11/06/2022]
Affiliation(s)
- João H. Santos
- Dept. of Chemistry; CICECO, University of Aveiro, Campus Universitário de Santiago; 3810-193 Aveiro Portugal
| | - Francisca A. e Silva
- Dept. of Chemistry; CICECO, University of Aveiro, Campus Universitário de Santiago; 3810-193 Aveiro Portugal
| | - Sónia P. M. Ventura
- Dept. of Chemistry; CICECO, University of Aveiro, Campus Universitário de Santiago; 3810-193 Aveiro Portugal
| | - João A. P. Coutinho
- Dept. of Chemistry; CICECO, University of Aveiro, Campus Universitário de Santiago; 3810-193 Aveiro Portugal
| | | | | | | |
Collapse
|
22
|
Reis IAO, Campos AF, Santos PHS, Santos SB, Soares CMF, Lima ÁS. Potassium Phosphate Salts-Based Aqueous Two-Phase Systems Applied in the Extraction of Gallic Acid from Guava. SEP SCI TECHNOL 2014. [DOI: 10.1080/01496395.2014.956180] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
23
|
Reis IAO, Santos SB, Pereira FDS, Sobral CRS, Freire MG, Freitas LS, Soares CMF, Lima ÁS. Extraction and Recovery of Rutin from Acerola Waste using Alcohol-Salt-Based Aqueous Two-Phase Systems. SEP SCI TECHNOL 2014. [DOI: 10.1080/01496395.2013.860461] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
24
|
|
25
|
Barbosa ADS, Silva MADO, Carvalho NB, Mattedi S, Iglesias MA, Fricks AT, Lima ÁS, Franceschi E, Soares CMF. IMMOBILIZATION OF LIPASE BY ENCAPSULATION IN SILICA AEROGEL. QUIM NOVA 2014. [DOI: 10.5935/0100-4042.20140155] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
26
|
Cabrera-Padilla RY, Albuquerque M, Figueiredo RT, Fricks AT, Franceschi E, Lima AS, A Dos Santos OA, Silva DP, Soares CMF. Immobilization and characterisation of a lipase from a new source, Bacillus sp. ITP-001. Bioprocess Biosyst Eng 2013; 36:1385-94. [PMID: 23673896 DOI: 10.1007/s00449-012-0875-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Accepted: 12/13/2012] [Indexed: 10/26/2022]
Abstract
A new source of lipase from Bacillus sp. ITP-001 was immobilized by physical adsorption on the polymer poly(3-hydroxybutyrate-co-hydroxyvalerate) (PHBV) in aqueous solution. The support and immobilized lipase were characterised, compared to the lyophilised lipase, with regard to the specific surface area, adsorption-desorption isotherms, pore volume (V(p)) and size (dp) by nitrogen adsorption, differential scanning calorimetry, thermogravimetric analysis, chemical composition analysis, Fourier transform infrared spectroscopy and biochemical properties. The immobilized enzyme displayed a shift in optimum pH towards the acidic side with an optimum at pH 4.0, whereas the optimum pH for the free enzyme was at pH 7.0; the optimum temperature of activity was 80 and 37 °C for the free and immobilized enzyme, respectively. The inactivation rate constant for the immobilized enzyme at 37 °C was 0.0038 h⁻¹ and the half-life was 182.41 h. The kinetic parameters obtained for the immobilized enzyme gave a Michaelis-Menten constant (K(m)) of 49.10 mM and a maximum reaction velocity (V(max)) of 205.03 U/g. Furthermore, the reuse of the lipase immobilized by adsorption allowed us to observe that it could be reused for 10 successive cycles, duration of each cycle (1 h), maintaining 33 % of the initial activity.
Collapse
Affiliation(s)
- Rebeca Y Cabrera-Padilla
- Universidade Tiradentes, Av. Murilo Dantas, 300, Bairro Farolândia, 49032-490, Aracaju-SE, Brazil
| | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Ventura SPM, de Barros RLF, Sintra T, Soares CMF, Lima AS, Coutinho JAP. Simple screening method to identify toxic/non-toxic ionic liquids: agar diffusion test adaptation. Ecotoxicol Environ Saf 2012; 83:55-62. [PMID: 22742861 DOI: 10.1016/j.ecoenv.2012.06.002] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 05/29/2012] [Accepted: 06/02/2012] [Indexed: 06/01/2023]
Abstract
A wide range of ionic liquids (ILs), containing a diverse set of cations, anions and alkyl chain lengths, was screened for their antimicrobial activity toward four microorganisms, Escherichia coli CCT-0355, Staphylococcus aureus ATCC-6533, Fusarium sp. LM03 and Candida albicans ATCC-76645. For that purpose an adaptation of the Agar Diffusion test was validated and successfully applied as a rapid screen method to identify toxic ILs, avoiding the use of more complex and expensive techniques. The effects of the cation alkyl chain length were studied, being observed both the "alkyl side chain" effect (increase in antimicrobial activity with the elongation of the alkyl chain) and "cut-off" effect (beyond a given chain length, the toxicity cannot be increased any further). Imidazolium-based ILs have in general, negative effects on the growth of these microorganisms dependent on the anion and alkyl chain length (growth inhibition halo from 1.98±0.04 mm for [C(2)mim]Cl to 39.53±0.81 mm for [C(10)mim]Cl). On the opposite, the phosphonium-based ILs do not seem to have negative effects for the longest alkyl chains (growth inhibition halos between 0.00±0.00 and 7.30±0.42 mm). It was also observed that the alkyl chain, cation family, and anion moiety all have significant effects on the antimicrobial activity these effects being well correlated with the lipophilicity of the ILs tested. The results also show that the microorganisms responses to the diverse ILs tested are dependent on their morphologic differences.
Collapse
Affiliation(s)
- Sónia P M Ventura
- CICECO, Campus Universitário de Santiago, Departamento de Química, Universidade de Aveiro, Aveiro, Portugal
| | | | | | | | | | | |
Collapse
|
28
|
Cabrera-Padilla RY, Lisboa MC, Fricks AT, Franceschi E, Lima AS, Silva DP, Soares CMF. Immobilization of Candida rugosa lipase on poly(3-hydroxybutyrate-co-hydroxyvalerate): a new eco-friendly support. ACTA ACUST UNITED AC 2012; 39:289-98. [DOI: 10.1007/s10295-011-1027-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Accepted: 08/08/2011] [Indexed: 11/28/2022]
Abstract
Abstract
The overall objective of this study is to evaluate the morphological [scanning electron microscopy (SEM)], physicochemical [differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), chemical composition analysis, Fourier-transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR)], and biochemical properties of Candida rugosa lipase (CRL) immobilized on a natural biopolymer poly(3-hydroxybutyrate-co-hydroxyvalerate) (PHBV) in aqueous solution. CRL was immobilized by physical adsorption with efficiency of 30%. Compared with free CRL enzyme, there were slight changes in immobilized CRL activity as a function of temperature (from 37°C to 45°C), but a similar optimal pH value of 7.0. Inactivation rate constants for immobilized CRL enzyme were 0.009 and 0.334 h−1, and half-lives were 77 and 2 h at 40°C and 60°C, respectively. Kinetic parameters obtained for immobilized CRL include the Michaelis–Menten constant of K m = 213.18 mM and maximum reaction velocity of V max = 318.62 U/g. The operational stability of immobilized CRL was tested repeatedly, and after 12 cycles of reuse, the enzyme retained 50% activity. Based on our results, we propose that PHBV-immobilized CRL could serve as a promising biocatalyst in several industrial applications.
Collapse
Affiliation(s)
- Rebeca Y Cabrera-Padilla
- grid.442005.7 Universidade Tiradentes Av. Murilo Dantas, 300, Bairro Farolândia 49032-490 Aracaju SE Brazil
| | - Milena C Lisboa
- grid.442005.7 Universidade Tiradentes Av. Murilo Dantas, 300, Bairro Farolândia 49032-490 Aracaju SE Brazil
| | - Alini T Fricks
- grid.442005.7 Universidade Tiradentes Av. Murilo Dantas, 300, Bairro Farolândia 49032-490 Aracaju SE Brazil
- grid.466823.d Instituto de Tecnologia e Pesquisa Av. Murilo Dantas, 300, Prédio do ITP, Bairro Farolândia 49032-490 Aracaju SE Brazil
| | - Elton Franceschi
- grid.442005.7 Universidade Tiradentes Av. Murilo Dantas, 300, Bairro Farolândia 49032-490 Aracaju SE Brazil
- grid.466823.d Instituto de Tecnologia e Pesquisa Av. Murilo Dantas, 300, Prédio do ITP, Bairro Farolândia 49032-490 Aracaju SE Brazil
| | - Alvaro S Lima
- grid.442005.7 Universidade Tiradentes Av. Murilo Dantas, 300, Bairro Farolândia 49032-490 Aracaju SE Brazil
- grid.466823.d Instituto de Tecnologia e Pesquisa Av. Murilo Dantas, 300, Prédio do ITP, Bairro Farolândia 49032-490 Aracaju SE Brazil
| | - Daniel P Silva
- grid.442005.7 Universidade Tiradentes Av. Murilo Dantas, 300, Bairro Farolândia 49032-490 Aracaju SE Brazil
- grid.466823.d Instituto de Tecnologia e Pesquisa Av. Murilo Dantas, 300, Prédio do ITP, Bairro Farolândia 49032-490 Aracaju SE Brazil
| | - Cleide M F Soares
- grid.442005.7 Universidade Tiradentes Av. Murilo Dantas, 300, Bairro Farolândia 49032-490 Aracaju SE Brazil
- grid.466823.d Instituto de Tecnologia e Pesquisa Av. Murilo Dantas, 300, Prédio do ITP, Bairro Farolândia 49032-490 Aracaju SE Brazil
| |
Collapse
|
29
|
Carvalho NB, de Souza RL, de Castro HF, Zanin GM, Lima ÁS, Soares CMF. Sequential Production of Amylolytic and Lipolytic Enzymes by Bacterium Strain Isolated from Petroleum Contaminated Soil. Appl Biochem Biotechnol 2008; 150:25-32. [DOI: 10.1007/s12010-008-8194-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2007] [Accepted: 02/22/2008] [Indexed: 11/24/2022]
|
30
|
Soares CMF, de Castro HF, Itako JE, de Moraes FF, Zanin GM. Characterization of Sol-Gel Bioencapsulates for Ester Hydrolysis and Synthesis. Appl Biochem Biotechnol 2005; 121-124:845-59. [PMID: 15930564 DOI: 10.1385/abab:123:1-3:0845] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Candida rugosa lipase was entrapped in silica sol-gel particles prepared by hydrolysis of methyltrimethoxysilane and assayed by p-nitrophenyl palmitate hydrolysis, as a function of pH and temperature, giving pH optima of 7.8 (free enzyme) and 5.0-8.0 (immobilized enzyme). The optimum temperature for the immobilized enzyme (50-55 degrees C) was 19 degrees C higher than for the free enzyme. Thermal, operational, and storage stability were determined with n-butanol and butyric acid, giving at 45 degrees C a half-life 2.7 times greater for the immobilized enzyme; storage time was 21 d at room temperature. For ester synthesis, the optimum temperature was 47 degrees C, and high esterification conversions were obtained under repeated batch cycles (half-life of 138 h).
Collapse
Affiliation(s)
- Cleide M F Soares
- Department of Chemical Engineering, State University of Maringa, Av. Colombo 5790, Bloco D-90, 87020-900, Maringa-PR, Brazil
| | | | | | | | | |
Collapse
|
31
|
Abstract
The hydrolysis of tetraethoxysilane using the sol-gel process was used to produce silica matrices, and these were tested for the immobilization of lipase from Candida rugosa by three methods: physical adsorption, covalent binding, and gel entrapment in the presence and absence of polyethylene glycol (PEG-1450). The silica matrices and their derivatives were characterized regarding particle size distribution, specific surface area, pore size distribution (Brunauer, Emmett, and Teller [B.E.T.] method), yield of grafting (thermogravimetric analyzer [TGA]), and chemical composition (Fourier transform infrared). Immobilization yields based on recovered lipase activity varied from 3.0 to 32.0%, and the highest efficiency was attained when lipase was encapsulated in the presence of PEG.
Collapse
Affiliation(s)
- Cleide M F Soares
- State University of Maringa, Department of Chemical Engineering, Av. Colombo 5790, Bloco D-90, 87020-900, Maringa-PR, Brazil
| | | | | | | | | |
Collapse
|
32
|
Soares CMF, Santana MHA, Zanin GM, de Castro HF. Covalent coupling method for lipase immobilization on controlled pore silica in the presence of nonenzymatic proteins. Biotechnol Prog 2003; 19:803-7. [PMID: 12790642 DOI: 10.1021/bp025779q] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Candida rugosa lipase was covalently immobilized on silanized controlled pore silica previously activated with glutaraldehyde in the presence of nonenzymatic proteins. This strategy is suggested to protect the enzyme from aggregation effects or denaturation that occurs as a result of the presence of silane precursors used in the formation of the silica matrix. The immobilization yield was evaluated as a function of the lipase loading and the additive type (albumin and lecithin) using statistical concepts. In agreement with the mathematical model, the maximum coupling yield (32.2%) can be achieved working at high lipase loading (450 units x g(-1) support) using albumin as an additive. In these conditions, the resulting immobilized lipase exhibits high hydrolytic (153.2 U x mg(-1)) and esterification (337.6 mmol x g(-1) x min) activities. The enhanced activity of the final lipase derivative is the sum of the benefits of the immobilization (that prevents enzyme aggregation) and the lipase coating by additives that increases the accessibility of active sites to the substrate.
Collapse
Affiliation(s)
- Cleide M F Soares
- Department of Chemical Engineering, Faculty of Chemical Engineering of Lorena, PO Box 116, 12606-970, Lorena, SP, Brazil
| | | | | | | |
Collapse
|
33
|
Soares CMF, De Castro HF, Santana MHA, Zanin GM. Intensification of lipase performance for long-term operation by immobilization on controlled pore silica in presence of polyethylene glycol. Appl Biochem Biotechnol 2002; 98-100:863-74. [PMID: 12018308 DOI: 10.1385/abab:98-100:1-9:863] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In agreement with previous studies, promising results were obtained when lipase was immobilized on controlled pore silica (CPS) in the presence of polyethylene glycol (PEG 1500). This methodology rendered immobilized derivatives with higher operational stability than those lacking PEG 1500. This article extends the scope of this approach by evaluating the combined effects of PEG concentration and lipase loading employing a multivariate statistical approach. A 2(2) factorial design with center point was adopted for a full understanding of these effects and their interactions. Conditions that maximize the immobilization yield were different from those attained for the biocatalyst's operational stability. Possible reasons for the increase in both activity and stability of lipase immobilized on CPS in the presence of PEG 1500 are discussed in light of the influence of surface hydrophilic/hydrophobic balance.
Collapse
Affiliation(s)
- Cleide M F Soares
- Department of Chemical Engineering, Faculdade de Engenharia Química de Lorena, SP, Brazil
| | | | | | | |
Collapse
|