Cobalamin-dependent enzymatic O-, N-, and S-demethylation.

Cobalamine cofactors (vitamin B12) are complex organometallic molecules that are crucial for the activity of a variety of different interesting enzymes such as isomerases, methyltransferases, and dehalogenases. Developments in understanding the structure, mechanism, and role in nature of methylcobalamin-dependent methyltransferases make them excellent candidates for biotechnological applications such as biocatalytic dealkylation.