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Stabilization of Immobilized Lipases by Intense Intramolecular Cross-Linking of Their Surfaces by Using Aldehyde-Dextran Polymers

Immobilized enzymes have a very large region that is not in contact with the support surface and this region could be the target of new stabilization strategies. The chemical amination of these regions plus further cross-linking with aldehyde-dextran polymers is proposed here as a strategy to increa...

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Autores principales: Orrego, Alejandro H., Ghobadi, Rohollah, Moreno-Perez, Sonia, Mendoza, Adriana Jaime, Fernandez-Lorente, Gloria, Guisan, Jose M., Rocha-Martin, Javier
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5855775/
https://www.ncbi.nlm.nih.gov/pubmed/29439521
http://dx.doi.org/10.3390/ijms19020553
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author Orrego, Alejandro H.
Ghobadi, Rohollah
Moreno-Perez, Sonia
Mendoza, Adriana Jaime
Fernandez-Lorente, Gloria
Guisan, Jose M.
Rocha-Martin, Javier
author_facet Orrego, Alejandro H.
Ghobadi, Rohollah
Moreno-Perez, Sonia
Mendoza, Adriana Jaime
Fernandez-Lorente, Gloria
Guisan, Jose M.
Rocha-Martin, Javier
author_sort Orrego, Alejandro H.
collection PubMed
description Immobilized enzymes have a very large region that is not in contact with the support surface and this region could be the target of new stabilization strategies. The chemical amination of these regions plus further cross-linking with aldehyde-dextran polymers is proposed here as a strategy to increase the stability of immobilized enzymes. Aldehyde-dextran is not able to react with single amino groups but it reacts very rapidly with polyaminated surfaces. Three lipases—from Thermomyces lanuginosus (TLL), Rhizomucor miehiei (RML), and Candida antarctica B (CALB)—were immobilized using interfacial adsorption on the hydrophobic octyl-Sepharose support, chemically aminated, and cross-linked. Catalytic activities remained higher than 70% with regard to unmodified conjugates. The increase in the amination degree of the lipases together with the increase in the density of aldehyde groups in the dextran-aldehyde polymer promoted a higher number of cross-links. The sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) analysis of those conjugates demonstrates the major role of the intramolecular cross-linking on the stabilization of the enzymes. The highest stabilization was achieved by the modified RML immobilized on octyl-Sepharose, which was 250-fold more stable than the unmodified conjugate. The TLL and the CALB were 40-fold and 4-fold more stable than the unmodified conjugate.
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spelling pubmed-58557752018-03-20 Stabilization of Immobilized Lipases by Intense Intramolecular Cross-Linking of Their Surfaces by Using Aldehyde-Dextran Polymers Orrego, Alejandro H. Ghobadi, Rohollah Moreno-Perez, Sonia Mendoza, Adriana Jaime Fernandez-Lorente, Gloria Guisan, Jose M. Rocha-Martin, Javier Int J Mol Sci Article Immobilized enzymes have a very large region that is not in contact with the support surface and this region could be the target of new stabilization strategies. The chemical amination of these regions plus further cross-linking with aldehyde-dextran polymers is proposed here as a strategy to increase the stability of immobilized enzymes. Aldehyde-dextran is not able to react with single amino groups but it reacts very rapidly with polyaminated surfaces. Three lipases—from Thermomyces lanuginosus (TLL), Rhizomucor miehiei (RML), and Candida antarctica B (CALB)—were immobilized using interfacial adsorption on the hydrophobic octyl-Sepharose support, chemically aminated, and cross-linked. Catalytic activities remained higher than 70% with regard to unmodified conjugates. The increase in the amination degree of the lipases together with the increase in the density of aldehyde groups in the dextran-aldehyde polymer promoted a higher number of cross-links. The sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) analysis of those conjugates demonstrates the major role of the intramolecular cross-linking on the stabilization of the enzymes. The highest stabilization was achieved by the modified RML immobilized on octyl-Sepharose, which was 250-fold more stable than the unmodified conjugate. The TLL and the CALB were 40-fold and 4-fold more stable than the unmodified conjugate. MDPI 2018-02-12 /pmc/articles/PMC5855775/ /pubmed/29439521 http://dx.doi.org/10.3390/ijms19020553 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Orrego, Alejandro H.
Ghobadi, Rohollah
Moreno-Perez, Sonia
Mendoza, Adriana Jaime
Fernandez-Lorente, Gloria
Guisan, Jose M.
Rocha-Martin, Javier
Stabilization of Immobilized Lipases by Intense Intramolecular Cross-Linking of Their Surfaces by Using Aldehyde-Dextran Polymers
title Stabilization of Immobilized Lipases by Intense Intramolecular Cross-Linking of Their Surfaces by Using Aldehyde-Dextran Polymers
title_full Stabilization of Immobilized Lipases by Intense Intramolecular Cross-Linking of Their Surfaces by Using Aldehyde-Dextran Polymers
title_fullStr Stabilization of Immobilized Lipases by Intense Intramolecular Cross-Linking of Their Surfaces by Using Aldehyde-Dextran Polymers
title_full_unstemmed Stabilization of Immobilized Lipases by Intense Intramolecular Cross-Linking of Their Surfaces by Using Aldehyde-Dextran Polymers
title_short Stabilization of Immobilized Lipases by Intense Intramolecular Cross-Linking of Their Surfaces by Using Aldehyde-Dextran Polymers
title_sort stabilization of immobilized lipases by intense intramolecular cross-linking of their surfaces by using aldehyde-dextran polymers
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5855775/
https://www.ncbi.nlm.nih.gov/pubmed/29439521
http://dx.doi.org/10.3390/ijms19020553
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