Solution phase refinement of active site structure using 2D NMR and judiciously 13C-labeled cytochrome P450
The Cytochrome P450 (CYP450) superfamily has been the subject of intense research for over six decades. Here the HU227 strain of E. coli, lacking the ?-aminolevulinic acid (?-ALA) synthase gene, was employed, along with [5-^(13)C] ?-ALA, in the heterologous expression of P450cam harboring a prosthetic group labeled with ^(13)C at the four methine carbons (C(m)) and pyrrole C(?) positions. The product was utilized as a proof of principle strategy for defining and refining solution phase active...
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