Modeling the performance of immobilized α-chymotrypsin catalyzed peptide synthesis in acetonitrile medium
(2001) In Journal of Molecular Catalysis - B Enzymatic 11(4-6). p.841-850- Abstract
A model was developed which describes simultaneous reaction and internal diffusion for kinetically controlled, immobilized α-chymotrypsin-catalyzed, oligopeptide synthesis in acetonitrile medium. The model combines the equations that describe the intrinsic kinetics of four different reactions and the physical characteristics of three different support materials, as determined experimentally, to predict the apparent initial activity and nucleophile selectivity of the immobilized biocatalyst. The model is able to predict reasonably well the experimentally observed initial rate and nucleophile selectivity vs. enzyme loading profiles. The reduction in observed initial rate with enzyme loading when fast reactions are carried out with... (More)
A model was developed which describes simultaneous reaction and internal diffusion for kinetically controlled, immobilized α-chymotrypsin-catalyzed, oligopeptide synthesis in acetonitrile medium. The model combines the equations that describe the intrinsic kinetics of four different reactions and the physical characteristics of three different support materials, as determined experimentally, to predict the apparent initial activity and nucleophile selectivity of the immobilized biocatalyst. The model is able to predict reasonably well the experimentally observed initial rate and nucleophile selectivity vs. enzyme loading profiles. The reduction in observed initial rate with enzyme loading when fast reactions are carried out with α-chymotrypsin immobilized on celite, and the larger influence of mass transfer limitations on the initial reaction rates than on nucleophile selectivities are correctly predicted by the numerical calculations. The model is general in terms of its application to other systems - enzymes, reactions, support materials and/or kinetic schemes - as long as the intrinsic kinetics and the characteristics of the enzyme and support material are known.
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- author
- Barros, Raúl J. LU ; Wehtje, Ernst LU and Adlercreutz, Patrick LU
- organization
- publishing date
- 2001-01-22
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Initial rate, Internal diffusion and reaction, Kinetically controlled peptide synthesis, Nucleophile selectivity, Numerical model
- in
- Journal of Molecular Catalysis - B Enzymatic
- volume
- 11
- issue
- 4-6
- pages
- 10 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:0035931365
- ISSN
- 1381-1177
- DOI
- 10.1016/S1381-1177(00)00030-8
- language
- English
- LU publication?
- yes
- id
- 67c7614f-4636-4325-b5b2-e31ca8881c8b
- date added to LUP
- 2019-06-20 15:47:35
- date last changed
- 2022-01-31 22:13:22
@article{67c7614f-4636-4325-b5b2-e31ca8881c8b, abstract = {{<p>A model was developed which describes simultaneous reaction and internal diffusion for kinetically controlled, immobilized α-chymotrypsin-catalyzed, oligopeptide synthesis in acetonitrile medium. The model combines the equations that describe the intrinsic kinetics of four different reactions and the physical characteristics of three different support materials, as determined experimentally, to predict the apparent initial activity and nucleophile selectivity of the immobilized biocatalyst. The model is able to predict reasonably well the experimentally observed initial rate and nucleophile selectivity vs. enzyme loading profiles. The reduction in observed initial rate with enzyme loading when fast reactions are carried out with α-chymotrypsin immobilized on celite, and the larger influence of mass transfer limitations on the initial reaction rates than on nucleophile selectivities are correctly predicted by the numerical calculations. The model is general in terms of its application to other systems - enzymes, reactions, support materials and/or kinetic schemes - as long as the intrinsic kinetics and the characteristics of the enzyme and support material are known.</p>}}, author = {{Barros, Raúl J. and Wehtje, Ernst and Adlercreutz, Patrick}}, issn = {{1381-1177}}, keywords = {{Initial rate; Internal diffusion and reaction; Kinetically controlled peptide synthesis; Nucleophile selectivity; Numerical model}}, language = {{eng}}, month = {{01}}, number = {{4-6}}, pages = {{841--850}}, publisher = {{Elsevier}}, series = {{Journal of Molecular Catalysis - B Enzymatic}}, title = {{Modeling the performance of immobilized α-chymotrypsin catalyzed peptide synthesis in acetonitrile medium}}, url = {{http://dx.doi.org/10.1016/S1381-1177(00)00030-8}}, doi = {{10.1016/S1381-1177(00)00030-8}}, volume = {{11}}, year = {{2001}}, }