title: Crystallization and preliminary X-ray analysis of a D-alanyl-D-alanine ligase (EcDdlB) from Escherichia coli.
abstract: A recombinant form of Escherichia coli DdlB (EcDdlB) has been prepared and cocrystallized with ADP and D-alanyl-D-alanine to represent the ternary complex of EcDdlB. Furthermore, EcDdlB has been cocrystallized under the same conditions with the ligands ATP and D-alanyl-D-alanine, representing the product-inhibited complex. The crystals belonged to space group P2(1)2(1)2(1), with unit-cell parameters a = 53.0, b = 97.6, c = 109.5 A and a = 51.2, b = 97.8, c = 110.1 A, respectively, and both contained two molecules in the asymmetric unit. Complete data sets were collected to 1.5 and 1.4 A resolution, respectively, from single crystals under cryogenic conditions using synchrotron radiation.
authors.affiliation: Department of Biological Sciences, University of Warwick, Coventry CV4 7AL, England.
authors.forename: Sarah
authors.initials: S
authors.lastname: Batson
authors.forename: Dean
authors.initials: D
authors.lastname: Rea
authors.forename: Vilmos
authors.initials: V
authors.lastname: Fülöp
authors.forename: David I
authors.initials: DI
authors.lastname: Roper
mesh_terms: D003460:Crystallization; D018360:Crystallography, X-Ray; D004926:Escherichia coli / Q000201:enzymology*; D010453:Peptide Synthases / Q000737:chemistry*
chemical_list: D010453:Peptide Synthases; C019638:D-alanylalanine synthetase
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