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Homology modelling of human CYP2 family enzymes based on the CYP2C5 crystal structure

1. The construction of molecular models for human cytochromes P450 from the CYP2 family are reported, utilizing the recently available crystal structure of CYP2C5, which is also a mammalian (rabbit) form of the enzyme. 2. In particular, selective substrate interactions with CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C19, CYP2D6 and CYP2E1 are described in the context of favourable contacts with active site amino acid residues that appear to orientate each substrate for metabolism at the experimentally observed position. 3. The results are consistent with reported findings from site-directed mutagenesis experiments with the CYP2 family, and with published information on substrate metabolism.