| Reversible enzyme immobilization via a very strong and nondistorting ionic adsorption on support-polyethylenimine composites. | |
| | |
MedLine Citation:
|
PMID: 10699877 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
New tailor-made anionic exchange resins have been prepared, based on films of large polyethylenimine polymers (e.g., MW 25,000) completely coating, via covalent immobilization, the surface of different porous supports (agarose, silica, polymeric resins). Most proteins contained in crude extracts from different sources have been very strongly adsorbed on them. Ionic exchange properties of such composites strongly depend on the size of polyethylenimine polymers as well as on the exact conditions of the covalent coating of the solids with the polymer. On the contrary, similar coating protocols yield similar matrices by using different porous supports as starting material. For example, 77% of all proteins contained in crude extracts from Escherichia coli were adsorbed, at low ionic strength, on the best matrices, and less than 15% of the adsorbed proteins were eluted from the support in the presence of 0.3 M NaCl. Under these conditions, 100% of the adsorbed proteins were eluted from conventional DEAE supports. Such polyethylenimine-support composites were also very suitable to perform very strong and nondistorting reversible immobilization of industrial enzymes. For example, lipase from Candida rugosa (CRL), beta-galactosidase from Aspergillus oryzae and D-amino acid oxidase (DAAO) from Rhodotorula gracilis, were adsorbed on such matrices in a few minutes at pH 7.0 and 4 degrees C. Immobilized enzymes preserved 100% of catalytic activity and remained fully immobilized in 0.2 M NaCl. In addition to that, CRL and DAAO were highly stabilized upon immobilization. Stabilization of DAAO, a dimeric enzyme, seems to be due to the involvement of both enzyme subunits in the ionic adsorption. |
| | |
Authors:
|
C Mateo; O Abian; R Fernandez-Lafuente; J M Guisan |
Related Documents
:
|
8401307 - The use of trehalose-stabilized lyophilized methanol dehydrogenase from hyphomicrobium ... 7764067 - Immobilization studies of an industrial penicillin acylase preparation on a silica carr... 20394577 - Determination of malic acid using a malate dehydrogenase reactor after purification and... 10355367 - Gallotannin hydrolysis by immobilized fungal mycelia in a packed bed bioreactor. 9920387 - 6-phosphogluconate dehydrogenase: the mechanism of action investigated by a comparison ... 10529007 - The length of the polyoxyethylene chain in the triton x detergents modulates the appare... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: Biotechnology and bioengineering Volume: 68 ISSN: 0006-3592 ISO Abbreviation: Biotechnol. Bioeng. Publication Date: 2000 Apr |
Date Detail:
|
Created Date: 2000-04-24 Completed Date: 2000-04-24 Revised Date: 2006-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 7502021 Medline TA: Biotechnol Bioeng Country: UNITED STATES |
Other Details:
|
Languages: eng Pagination: 98-105 Citation Subset: IM |
Copyright Information:
|
Copyright 2000 John Wiley & Sons, Inc. |
Affiliation:
|
Departamento de Biocatalisis, Instituto de Catalisis, CSIC, Campus Universidad Autonoma, Cantoblanco, 28049 Madrid, Spain. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adsorption Anion Exchange Resins* Biotechnology / methods* Enzymes, Immobilized* Polyethyleneimine* |
| Chemical | |
Reg. No./Substance:
|
0/Anion Exchange Resins; 0/Enzymes, Immobilized; 9002-98-6/Polyethyleneimine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: A forced-flow membrane reactor for transfructosylation using ceramic membrane.
Next Document: Three-dimensional engineered heart tissue from neonatal rat cardiac myocytes.