Microbead immobilization of enzymes

C - Chemistry – Metallurgy – 12 – N

Patent

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C12N 11/10 (2006.01) C12N 11/02 (2006.01) C12N 11/04 (2006.01) C12P 17/10 (2006.01)

Patent

CA 2344355

A method is disclosed for immobilizing enzymes for use in catalyzing organic reactions, in which the enzyme is imbibed into a dehydrated hydrocolloid polymer gel bead which has a network structure capable of swelling in aqueous media. The resulting enzyme-laden bead may then itself be dehydrated for eventual use in such organic reactions. The use of the enzyme laden beads as a catalyst for organic reactions is demonstrated in the transesterification reaction of N-acetyl-L-phenylalanine ethyl ester with propanol to N-acetyl-L- phenylalanine propyl ester in an octane solvent using subtilisin Carlsberg enzyme.

L'invention porte sur un procédé d'immobilisation d'enzymes qu'on met en oeuvre dans des réactions organiques catalytiques. Les enzyme sont chargées dans une bille de gel polymère hydrocolloïde déshydraté présentant une structure réticulaire capable de gonfler dans un milieu aqueux. La bille chargée d'enzymes ainsi obtenue peut elle-même être ensuite déshydratée pour une utilisation éventuelle dans de telles réactions organiques. L'utilisation des billes chargées d'enzymes comme catalyseurs est traduite dans la réaction de transestérification de N-acétyl-L-phénylalanine-éthyl-ester et propanol avec N-acétyl-L-phénylalanine-propyl-ester dans un solvant d'octane, au moyen de l'enzyme subtilisine de Carlsberg.

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