Maru I, Ohnishi J, Ohta Y, Hashimoto W, Tsukada Y, Murata K, Mikami B
Kyoto Research Laboratories, Marukin Shoyu Co., Ltd.
J Biochem. 1996 Sep;120(3):481-2. doi: 10.1093/oxfordjournals.jbchem.a021437.
N-Acyl-D-glucosamine 2-epimerase from porcine kidney, which was cloned and expressed in Escherichia coli, was crystallized by the vapor-diffusion method, using polyethylene glycol and ammonium acetate as precipitants. The crystals were resistant to X-ray radiation damage and diffracted to more than 2.0 A resolution. The diffraction pattern indicated that the crystals belong to the orthorhombic system, space group P2(1)2(1)2(1), with unit-cell dimensions of a = 78.1, b = 97.2, and c = 100.7 A. It is supposed that the asymmetric unit consists of two N-acyl-D-glucosamine 2-epimerase molecules. Collection of data on the native crystals indicated that they are suitable for X-ray structural analysis.
