Crystallization and preliminary X-ray analysis of an exotype alginate lyase Atu3025 from Agrobacterium tumefaciens strain C58, a member of polysaccharide lyase family 15.

Almost all alginate lyases depolymerize alginate in an endolytical fashion via a beta-elimination reaction. The alginate lyase Atu3025 from Agrobacterium tumefaciens strain C58, consisting of 776 amino-acid residues, is a novel exotype alginate lyase classified into polysaccharide lyase family 15. The enzyme was crystallized at 293 K by sitting-drop vapour diffusion with polyethylene glycol 4000 as a precipitant. Preliminary X-ray analysis showed that the Atu3025 crystal belonged to space group P2(1) and diffracted to 2.8 angstroms resolution, with unit-cell parameters a = 107.7, b = 108.3, c = 149.5 angstroms, beta = 91.5 degrees.