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Whole-cell catalysts for non-natural chemical reactions will open new routes to sustainable production of chemicals. We designed a cytochrome 'P411' with unique serine-heme ligation that catalyzes efficient and selective olefin cyclopropanation in intact Escherichia coli cells. The mutation C400S in cytochrome P450BM3 gives a signature ferrous CO Soret peak at 411 nm, abolishes monooxygenation activity, raises the resting-state FeIII-to-FeII reduction potential and substantially improves NAD(P)H-driven activity. [ABSTRACT FROM AUTHOR]

A correction to the article "A serine-substituted P450 catalyzes highly efficient carbene transfer to olefins in vivo" that was published in the June 23, 2013 issue is presented.