6.3.1.5 - 954 6.3.1.5 28 mg/ml purified recombinant enzyme, pure or in complex with substrates NAD+ and ATP, hanging-drop vapour diffusion method, 22°C room temperature, protein in 0.01 M HEPES, pH 7.5, 5 mM MgCl2, 3 mM DTT, precipitant solution: 0.1 M HEPES, pH 7.5, 1.5 M lithium sulfate, X-ray diffraction structure determination at 2.0 A resolution, compex structure determination via molecular replacement method 653053 6.3.1.5 crystal structures of apo- and complex forms with deamido-NAD+ and ATP to a resolution of 2.3 and 1.7 respectively. Hanging drop vapor diffusion method. Crystals of SeMet-containing NAD+ synthase belong to space group C2 with unit cell dimensions of a = 92.3, b = 47.5, c = 64.0, and beta = 110°. Crystals of NAD+ synthetase complexed with deamido-NAD+ belong to space group P3(1), with unit cell dimensions of a = b = 63.4, c = 125.7 A 663361 6.3.1.5 crystal structures of the enzyme alone and in complex with natural substrates and with the reaction product NAD+ 662353 6.3.1.5 enzyme in complex with ATP, ATP-Tl+, ATP-Mn2+, or NAD-adenylate, hanging-drop vapour diffusion method, 15 mg/ml protein, 5 mM ATP, 20 mM NAD+ in 0.1 M sodium acetate, pH 5.2, 22% PEG 400, and 50 mM MgCl2, thallium acetate, or MnCl2 20°C, 24 h before data collection the crystale are soaked in a cryoprotectant buffer, X-ray diffraction structure determination at 1.3 A resolution, structure analysis and modeling 653920 6.3.1.5 free enzyme form at 2.6 A resolution and in a complex with ATP at 2.0 A resolution 957 6.3.1.5 hanging drop vapour diffusion method using 8-12% PEG 8000, 0.505 M ammonium sulfate, 6% glycerol, 100 mM magnesium chloride, 0.05% n-octyl-beta-D-glucopyranoside, 100 mM HEPES, pH 7 671062 6.3.1.5 purified recombinant detagged enzyme, sitting drop vapor diffusion method, mixing of 30 mg/ml protein in 0.2 M NaCl, 20 mM Tris-HCl, pH 8.0, 1 mM DTT, 5 mM MgCl2, and 5% glycerol, with reservoir solution containing 20% PEG 4000, 0.2 M lithium sulfate, 0.1 M MES, pH 6.0, 23°C, 3 days, method optimization, X-ray diffraction structure determination and analysis at 2.60 A resolution, molecular replacement 744619 6.3.1.5 purified recombinant enzyme complexed with substrates, vapour diffusion method at 5.2 under earth gravity at pH 5.2, and microseeding under space microgravity, the latter in protein solution containing 15 mg/ml protein, 2.5 mM ATP, 5 mM deamido-NAD+, 50 mM Tris, pH 8.5, 50 mM MgCl2, 25% PEG 400 v/v, 9 days, X-ray diffractio structure determination at 1.0 A resolution and analysis of the crystal structures at pH 5.2 and pH 8.5 649175 6.3.1.5 purified recombinant enzyme, in complex with 4 different substrates: complex I is formed by enzyme and deamido-NAD, complex II is formed by enzyme and ATP, complex III is formed by enzyme, deamido-NAD and ATP, complex is formed by enzyme and substrate analogue alpha,beta-methylene-adenosine triphosphate, crystallization from protein solution: 15 mg/ml protein, 20 mM sodium acetate, pH 5.2, 50 mM MgCl2, 2.5 mM 2-mercaptoethanol, plus equal volume of 0.1 M sodium acetate, pH 5.2, 21-23% PEG 400, 50 mM MgCl2, at room temperature, addition of substrates at different concentrations, formation of complex IV at different pH-values, in the reservoir solution: 50 mM HEPES, pH 7.5, 0.1 M MgCl2, 20-26% PEG 400, 2 mM AMP-CPP, X-ray diffraction structure determination at resolution 1.9-2.3, structure analysis 649168