Article
A hydrogen-bonding network is important for oxidation and isomerization in the reaction catalyzed by cholesterol oxidase.
Acta crystallographica. Section D, Biological crystallography - 1 Nov 2009
Lyubimov Artem Y, Chen Lin, Sampson Nicole S, Vrielink Alice
Abstract excerpt
Cholesterol oxidase is a flavoenzyme that catalyzes the oxidation and isomerization of 3beta-hydroxysteroids. Structural and mutagenesis studies have shown that Asn485 plays a key role in substrate oxidation. The side chain makes an NH...pi interaction with the reduced form of the flavin cofactor. A N485D mutant was constructed to further test the role of the amide group in catalysis. The mutation resulted in a...
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