Crystallization and preliminary X-ray crystallographic analysis of a ytfG gene product from Escherichia coli

The Escherichia coli ytfG gene product, with NAD(P)H:quinone oxidoreductase activity, was crystallized by the hanging-drop vapour-diffusion method at 296 K. A 1.78 Å data set has been collected using synchrotron radiation at Pohang Light Source, South Korea. The crystal belongs to the primitive trigonal system, with unit-cell parameters a = b = 81.7, c = 76.8 Å. Analysis of the packing density shows that the asymmetric unit probably contains one monomer, with a solvent content of 48.8%.