Oxidative transformations of amino acids and peptides catalysed by Cytochromes P450

Cytochromes P450 (P450s) are a superfamily of oxidoreductases that display not only a high degree of substrate diversity across xenobiotic and secondary metabolism but also show flexibility in the oxidation chemistry that they catalyse. The oxidative transformation of amino acids and peptides by P450s represents an important collection of transformations for this enzyme class: these transformations are used in Nature to diversify the limited range of monomers available for ribosomal peptide production, as well as altering peptides to afford desired biological properties. This chapter will highlight current examples of P450-catalysed transformations of amino acids and peptides, organised by the nature of the oxidative transformation performed by the P450.