Purification, crystallization and x-ray analysis of crystals of pectate lyase A from Exwinia chrysanthemi.

Pectate lyase A is secreted by Erwinia chrysanthemi and is a virulence factor for soft rot diseases in plants. Crystals of pectate lyase A were obtained by vapor-diffusion techniques in the presence of polyethylene glycol. The crystals belong to the monoclinic space group P2(1), with unit-cell parameters a = 48.96, b = 148.86, c = 78.61 A, beta = 97.32 degrees. The crystals contain two protein molecules of 38 kDa per asymmetric unit and diffract to 2.4 A using Cu Kalpha radiation.