Process for immobilization of protein catalysts, product, and use
View Patent ↗An immobilized protein catalyst is prepared by applying an adhesive to a polymeric support, applying a layer of a globular protein over the layer of adhesive, binding a crosslinking agent to the protein layer, and binding the protein catalyst by reaction with the crosslinking agent.
1. A method of preparing an immobilized protein catalyst, comprising steps of
(a) applying a polymeric adhesive to a polymeric support to adhere said polymeric support to a globular protein layer;
(b) applying a layer of a globular protein over the layer of adhesive to form said globular protein layer;
(c) binding a crosslinking agent to the protein layer; and
(d) reacting a protein catalyst with the crosslinking agent thereby binding said protein catalyst to said crosslinking agent to immobilize said protein catalyst on said polymeric support.
2. A method of preparing an immobilized protein catalyst according to claim 1 , comprising applying a one-component, solvent-based polymer adhesive in step (a).
3. A method of preparing an immobilized protein catalyst according to claim 1 , comprising applying a crosslinking agent having a plurality of groups reactive with a member selected from the group consisting of amine groups, carboxylic acid groups, phenolic groups, sufhydryl groups, and imidazole groups.
4. A method of preparing an immobilized protein catalyst according to claim 1 , comprising applying a crosslinking agent having a plurality of groups reactive with hydrogens of amine groups in step (c).
5. A method of preparing an immobilized protein catalyst according to claim 1 , wherein the adhesive applied in step (a) is dried before step (b).
6. A method of preparing an immobilized protein catalyst according to claim 1 , wherein the polymeric support comprises a member selected from the group consisting of polyethylene, polypropylene, polybutadiene, polyamide, polycarbonate, vinyl polymers, polypropylene glycol, polyesters, phenolic polymers, epoxy polymers, polyurethanes, acrylic polymers, styrene polymers and copolymers, and combinations thereof.
7. A method of preparing an immobilized protein catalyst according to claim 1 , wherein the adhesive is applied as a dilute solution.
8. A method of preparing an immobilized protein catalyst according to claim 7 , wherein the adhesive is diluted in organic solvent selected from the group consisting of hexane, heptane, toluene, xylene, methylene chloride, carbon tetrachloride, trichloromethane, Type I light aromatic naphtha (Aromatic 100), tetrahydrofuran, acetone, 2-propanol, methanol, acetronitrile, and combinations thereof and wherein the adhesive is applied in step (a) by dipping the support into the adhesive diluted in organic solvent.
9. A method of preparing an immobilized protein catalyst according to claim 1 , wherein the globular protein comprises an albumin.
10. A method of preparing an immobilized protein catalyst according to claim 1 , wherein the globular protein comprises ovalbumin.
11. A method of preparing an immobilized protein catalyst according to claim 1 , wherein the crosslinking agent has a plurality of aldehyde groups, isocyanate groups, oxirane groups, thio groups, sulfhydryl groups, amine groups, or photoreactive groups.
12. A method of preparing an immobilized protein catalyst according to claim 1 , wherein the crosslinking agent comprises glutaraldehyde.
13. A method of preparing an immobilized protein catalyst according to claim 1 , wherein the protein catalyst comprises carbonic anhydrase.