Abstract
Proteins designed for supramolecular assembly provide a simple means to immobilize and organize enzymes for biotechnology applications. We have genetically fused the thermostable alcohol dehydrogenase D (AdhD) from Pyrococcus furiosus to a computationally designed cage-forming protein (O3-33). The trimeric form of the O3-33-AdhD fusion protein was most active in solution. The immobilization of the fusion protein on bioelectrodes leads to a doubling of the electrochemical operational stability as compared to the unfused control proteins. Thus, the fusion of enzymes to the designed self-assembling domains offers a simple strategy to increase the stability in biocatalytic systems.
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