title: Cloning and characterization of the ddsA gene encoding decaprenyl diphosphate synthase from Rhodobacter capsulatus B10.
abstract: A decaprenyl diphosphate synthase gene (ddsA, GenBank accession No. DQ191802) was cloned from Rhodobacter capsulatus B10 by constructing and screening the genome library. An open reading frame of 1002 bp was revealed from sequence analysis. The deduced polypeptide consisted of 333 amino acids residues with an molecular mass of about 37 kDa. The DdsA protein contained the conserved amino acid sequence (DDXXD) of E-type polyprenyl diphosphate synthase and showed high similarity to others. In contrast, DdsA showed only 39% identity to a solanesyl diphosphate synthase cloned from R. capsulatus SB1003. DdsA was expressed successfully in Escherichia coli. Assaying the enzyme in vivo found it made E.coli synthesize UQ-10 in addition to the endogenous production UQ-8.
authors.affiliation: State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, China.
authors.forename: Xinyi
authors.initials: X
authors.lastname: Liu
authors.forename: Haizhen
authors.initials: H
authors.lastname: Wu
authors.forename: Jiang
authors.initials: J
authors.lastname: Ye
authors.forename: Qinsheng
authors.initials: Q
authors.lastname: Yuan
authors.forename: Huizhan
authors.initials: H
authors.lastname: Zhang
mesh_terms: D019883:Alkyl and Aryl Transferases / Q000235:genetics* / Q000378:metabolism*; D000595:Amino Acid Sequence; D001483:Base Sequence; D002851:Chromatography, High Pressure Liquid; D003001:Cloning, Molecular; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism; D008969:Molecular Sequence Data; D011994:Recombinant Proteins / Q000378:metabolism; D016354:Rhodobacter capsulatus / Q000201:enzymology* / Q000235:genetics*; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D014451:Ubiquinone / Q000378:metabolism
chemical_list: D011994:Recombinant Proteins; D014451:Ubiquinone; D019883:Alkyl and Aryl Transferases; C039821:decaprenyl pyrophosphate synthetase