Crystallization and preliminary X-ray analysis of chondroitinase B from Flavobacterium heparinum.

Chondroitinase B, a glycosaminoglycan lyase from Flavobacterium heparinum, has been crystallized by hanging-drop vapor diffusion in space group P21 with unit-cell parameters a = 50.6, b = 74.5, c = 58. 7 A, beta = 92.9 degrees and one molecule in the asymmetric unit. This enzyme degrades dermatan sulfate, a glycosaminoglycan primarily made up of a disaccharide repeating unit of iduronic acid and N-acetylgalactosamine. A complete native data set has been collected from a single crystal to 2.2 A resolution using a rotating-anode source.