title: Crystallization, diffraction data collection and preliminary crystallographic analysis of hexagonal crystals of Pseudomonas aeruginosa amidase.
abstract: The aliphatic amidase (acylamide amidohydrolase; EC 3.5.1.4) from Pseudomonas aeruginosa is a hexameric enzyme composed of six identical subunits with a molecular weight of approximately 38 kDa. Since microbial amidases are very important enzymes in industrial biocatalysis, the structural characterization of this enzyme will help in the design of novel catalytic activities of commercial interest. The present study reports the successful crystallization of the wild-type amidase from P. aeruginosa. Native crystals were obtained and a complete data set was collected at 1.4 A resolution, although the crystals showed diffraction to 1.25 A resolution. The crystals were found to belong to space group P6(3)22, with unit-cell parameters a = b = 102.60, c = 151.71 A, and contain one molecule in the asymmetric unit.
authors.affiliation: Instituto de Tecnologia Química e Biológica, Universidade Técnica de Lisboa, Apartado 127, 2781-901 Oeiras, Portugal.
authors.forename: Jorge
authors.initials: J
authors.lastname: Andrade
authors.forename: Amin
authors.initials: A
authors.lastname: Karmali
authors.forename: Maria A
authors.initials: MA
authors.lastname: Carrondo
authors.forename: Carlos
authors.initials: C
authors.lastname: Frazão
mesh_terms: D000581:Amidohydrolases / Q000032:analysis / Q000737:chemistry*; D001406:Bacillaceae / Q000201:enzymology; D001426:Bacterial Proteins / Q000032:analysis / Q000737:chemistry*; D003460:Crystallization; D018360:Crystallography, X-Ray / Q000379:methods*; D015195:Drug Design; D007218:Industrial Microbiology / Q000379:methods; D011550:Pseudomonas aeruginosa / Q000201:enzymology*; D040681:Structural Homology, Protein; D014961:X-Ray Diffraction / Q000379:methods*
chemical_list: D001426:Bacterial Proteins; D000581:Amidohydrolases; C019665:amidase