title: Crystallization and preliminary characterization of crystals of R-alcohol dehydrogenase from Lactobacillus brevis.
abstract: The R-specific alcohol dehydrogenase (RADH) from Lactobacillus brevis is a valuable catalyst for the production of chiral alcohols that can be used as synthons in asymmetric syntheses. RADH is a homotetramer with 222 symmetry and a molecular mass of 107 kDa. The recombinant enzyme has been expressed in Escherichia coli, purified to homogeneity and crystallized. The crystals belong to the orthorhombic space group I222, with unit-cell parameters a = 56.5, b = 85.1, c = 115.4 A, and diffract X-rays to at least 1.8 A resolution. The calculated crystal packing parameter V(M) = 2.59 A(3) Da(-1), corresponding to a solvent content of 52.5% and suggesting that one RADH monomer is contained in the asymmetric unit. The RADH tetramer lies on a special position with its molecular dyads coinciding with the crystallographic twofold axes and with its centre of mass on the origin of the unit cell.
authors.affiliation: Universität Köln, Institut für Biochemie, Zülpicher Strasse 47, D-50674 Köln, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Niefind
authors.forename: B
authors.initials: B
authors.lastname: Riebel
authors.forename: J
authors.initials: J
authors.lastname: Müller
authors.forename: W
authors.initials: W
authors.lastname: Hummel
authors.forename: D
authors.initials: D
authors.lastname: Schomburg
mesh_terms: D000426:Alcohol Dehydrogenase / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism; D003460:Crystallization; D018360:Crystallography, X-Ray; D007778:Lactobacillus / Q000201:enzymology*; D009243:NAD / Q000378:metabolism; D011487:Protein Conformation
chemical_list: D009243:NAD; D000426:Alcohol Dehydrogenase