The site of metal ion binding in a nickel derivative of adenosine 5'-monophosphate: an x-ray study.

Single-crystal X-ray methods have been used to characterize a nickel derivative of adenosine 5'-monophosphate, of stoicheiometry Ni(5'-AMP)(H2O)5]-H2O. The metal atom binds to the N(7) position on the adenine base, with the five remaining octahedral coordination sites about nickel occupied by water molecules. The phosphate group is connected via intramolecular hydrogen bonds to coordinated water molecules.