title: Crystallization and preliminary X-ray diffraction studies of Aes acetyl-esterase from Escherichia coli.
abstract: The acetyl-esterase Aes from Escherichia coli, which belongs to the HSL group of the esterase/lipase superfamily, has been crystallized by the hanging-drop vapour-diffusion method using polyethylene glycol 8000 as a precipitant and magnesium chloride as an additive. Crystals belong to the orthorhombic space group P2(1)2(1)2(1), with unit-cell parameters a = 110.0, b = 190.6, c = 218.6 A. A complete data set has been collected to 2.5 A resolution at the Elettra synchrotron source, Trieste using a single frozen crystal. Packing density considerations agree with 10-16 monomers in the asymmetric unit, with a corresponding solvent content of 61-38%.
mesh_terms: D000115:Acetylesterase / Q000096:biosynthesis / Q000737:chemistry* / Q000235:genetics; D003460:Crystallization / Q000379:methods; D018360:Crystallography, X-Ray / Q000379:methods; D004926:Escherichia coli / Q000201:enzymology*; D029968:Escherichia coli Proteins; D011487:Protein Conformation; D011506:Proteins / Q000737:chemistry* / Q000378:metabolism; D011994:Recombinant Proteins / Q000096:biosynthesis / Q000737:chemistry / Q000235:genetics; D017356:Synchrotrons
chemical_list: D029968:Escherichia coli Proteins; D011506:Proteins; D011994:Recombinant Proteins; C115513:AES protein, E coli; D000115:Acetylesterase