This paper (corresponding author, Masafumi Odaka) develops the knowledge around how a nitrile hydratase actually manages to stuff a water into a rather stable carbon-nitrogen triple bond. It also resulted in a rather nice suite of crystal structures- one parent structure (in pdb as 3A8O) and four single point mutants.
*Kinetic and structural studies on roles of the serine ligand and a strictly conserved tyrosine residue in nitrile hydratase - Yamanaka, Hashimoto, Ohtaki, Noguchi, Yohda and Odaka, in Journal of Biological Inorganic Chemistry (2010), doi: 10.1007/s00775-010-0632-3
This is an image produced using DeepView of 3A8O with the position of the iron labelled.
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