Role of Thr-252 in cytochrome P450cam: a study with unnatural amino acid mutagenesis.


Replacement of Thr-252 in the active center of cytochrome P450cam with a non-hydroxy amino acid residue such as Ala and Val by conventional site-directed mutagenesis converted this monooxygenase to an NADH oxidase (Imai, M. et al. Proc. Natl. Sci. U. S. A. 86, 7823-7827, 1989). In this study, a mutant enzyme with a methoxy group in place of the hydroxy… (More)


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