title: Exploration of genes that encode a carbocycle-forming enzyme involved in biosynthesis of aminoglycoside antibiotics from the environmental DNA.
abstract: 2-Deoxy-scyllo-inosose (DOI) synthase is the enzyme participating in biosynthesis of 2-deoxystreptamine (DOS)-containing aminoglycoside antibiotics. The gene which encodes the enzyme can be a marker for screening of DOS-containing aminoglycoside-producer and exploration of its biosynthetic gene. Further, this enzyme is expected to be of use in industry, because it converts sugar into 6-membered carbocycle. In the present study, we identified 21 clones encoding DOI synthase from environmental DNA by degenerate PCR. They were clearly divided into two groups. One appeared to derive from actinomycetes, and the other from non-actinomycetes. The latter group was larger (17 clones) than the former (four clones) despite the fact that only one strain of non-actinomycete was identified for DOS-containing aminoglycoside production. This result indicates that there are still many unidentified non-actinomycetes for DOS-containing aminoglycoside biosynthesis. We showed the possibility of identification of novel aminoglycoside-producing non-actinomycete from soil, and for development of more efficient enzymes for industrial use.
authors.affiliation: Department of Chemistry, College of Humanities and Sciences, Nihon University, Tokyo 156-8550, Japan. htamegai@chs.nihon-u.ac.jp
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Tamegai
authors.forename: To-ichiro
authors.initials: T
authors.lastname: Kuki
authors.forename: Yuri
authors.initials: Y
authors.lastname: Udagawa
authors.forename: Rie
authors.initials: R
authors.lastname: Aoki
authors.forename: Atsushi
authors.initials: A
authors.lastname: Nagaya
authors.forename: Shu-ichi
authors.initials: S
authors.lastname: Tsukada
mesh_terms: D039903:Actinobacteria / Q000201:enzymology; D000595:Amino Acid Sequence; D000617:Aminoglycosides / Q000096:biosynthesis*; D000900:Anti-Bacterial Agents / Q000096:biosynthesis*; D004269:DNA, Bacterial / Q000235:genetics / Q000378:metabolism*; D004271:DNA, Fungal / Q000235:genetics / Q000378:metabolism*; D006595:Hexosamines; D008190:Lyases / Q000235:genetics* / Q000378:metabolism; D008969:Molecular Sequence Data; D010802:Phylogeny; D016133:Polymerase Chain Reaction; D012988:Soil Microbiology
chemical_list: D000617:Aminoglycosides; D000900:Anti-Bacterial Agents; D004269:DNA, Bacterial; D004271:DNA, Fungal; D006595:Hexosamines; D008190:Lyases; C085631:2-deoxy-scyllo-inosose synthase; C007265:2-deoxystreptamine