Crystallization and preliminary X-ray diffraction studies of FAD synthetase from Corynebacterium ammoniagenes.

FAD synthetase from Corynebacterium ammoniagenes (CaFADS), a prokaryotic bifunctional enzyme that catalyses the phosphorylation of riboflavin as well as the adenylylation of FMN, has been crystallized using the hanging-drop vapour-diffusion method at 277 K. Diffraction-quality cubic crystals of native and selenomethionine-labelled (SeMet-CaFADS) protein belonged to the cubic space group P2(1)3, with unit-cell parameters a = b = c = 133.47 A and a = b = c = 133.40 A, respectively. Data sets for native and SeMet-containing crystals were collected to 1.95 and 2.42 A resolution, respectively.