dCMP deaminase in complex with dCTP and an intermediate analogue, X-ray diffraction structure determination and analysis at 1.66-3.0 A resolution, the crystal structure of the free-state enzyme is determined by the zinc multiwavelength anomalous dispersion, MAD, method
purified mutant R115E free or in complex with active site binding inhibitor pyrimidin-2-one deoxyribotide, the mutant R115E is dimeric in solution, while hexameric in crystals, hanging drop vapour diffusion method, 0.28 mM mutant R115E protein in 20 mM phosphate, pH 7.2, 0.38 mM inhibitor, and 30 mM DTT, is mixed with an equal volume of reservoir solution containing 1.3 M ammonium sulfate, 0.1 M sodium citrate, pH 6.0, and 10 mM DTT, 22°C, 3 weeks, X-ray diffraction structure determination and analysis at 2.2 A resolution