title: Expression, crystallization and preliminary X-ray crystallographic analysis of Xoo0352, D-alanine-D-alanine ligase A, from Xanthomonas oryzae pv. oryzae.
abstract: Xanthomonas oryzae pv. oryzae (Xoo) causes bacterial blight (BB), which is one of the most devastating diseases of rice in most rice-growing countries. D-Alanine-D-alanine ligase A (DdlA), coded by the Xoo0352 gene, was expressed, purified and crystallized. DdlA is an enzyme that is involved in D-alanine metabolism and the biosynthesis of an essential bacterial peptidoglycan precursor, in which it catalyzes the formation of D-alanyl-D-alanine from two D-alanines, and is thus an attractive antibacterial drug target against Xoo. The DdlA crystals diffracted to 2.3 A resolution and belonged to the primitive tetragonal space group P4(3)2(1)2, with unit-cell parameters a = b = 83.0, c = 97.6 A. There is one molecule in the asymmetric unit, with a corresponding V(M) of 1.88 A(3) Da(-1) and a solvent content of 34.6%. The initial structure was determined by molecular replacement using D-alanine-D-alanine ligase from Staphylococcus aureus (PDB code 2i87) as a template model.
authors.affiliation: Department of Advanced Technology Fusion, Konkuk University, Hwayang-dong, Gwangjin-gu, Seoul 143-701, Republic of Korea.
authors.forename: Thanh Thi Ngoc
authors.initials: TT
authors.lastname: Doan
authors.forename: Jin-Kwang
authors.initials: JK
authors.lastname: Kim
authors.forename: Hyesoon
authors.initials: H
authors.lastname: Kim
authors.forename: Yeh-Jin
authors.initials: YJ
authors.lastname: Ahn
authors.forename: Jeong-Gu
authors.initials: JG
authors.lastname: Kim
authors.forename: Byoung-Moo
authors.initials: BM
authors.lastname: Lee
authors.forename: Lin-Woo
authors.initials: LW
authors.lastname: Kang
mesh_terms: D000409:Alanine / Q000235:genetics / Q000378:metabolism; D001426:Bacterial Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D003001:Cloning, Molecular; D018360:Crystallography, X-Ray; D010453:Peptide Synthases / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D014974:Xanthomonas / Q000201:enzymology* / Q000378:metabolism
chemical_list: D001426:Bacterial Proteins; D010453:Peptide Synthases; C019638:D-alanylalanine synthetase; D000409:Alanine