title: Butirosin-biosynthetic gene cluster from Bacillus circulans.
abstract: Butirosin is an interesting 2-deoxystreptamine (DOS)-containing aminoglycoside antibiotic produced by non-actinomycete Bacilli. Recently we were successful in purification of 2-deoxy-scyllo-inosose synthase from butirosin-producer Bacillus circulans as the key enzyme for the biosynthesis of DOS, in cloning of the responsible gene (btrC), and in its overexpression in Escherichia coli. The present study involved gene-walking approach, which allowed us to find a gene cluster around btrC. The function of each gene was further investigated by gene disruption, and the disruptants of btrB, btrC, btrD and btrM showed no antibiotic producing activity. Therefore, the gene cluster found so far was determined to be a part of the butirosin biosynthetic gene cluster. Functions of some ORFs are also discussed in terms of butirosin biosynthesis on the basis of database search.
authors.affiliation: Department of Chemistry, Tokyo Institute of Technology, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Ota
authors.forename: H
authors.initials: H
authors.lastname: Tamegai
authors.forename: F
authors.initials: F
authors.lastname: Kudo
authors.forename: H
authors.initials: H
authors.lastname: Kuriki
authors.forename: A
authors.initials: A
authors.lastname: Koike-Takeshita
authors.forename: T
authors.initials: T
authors.lastname: Eguchi
authors.forename: K
authors.initials: K
authors.lastname: Kakinuma
mesh_terms: D000595:Amino Acid Sequence; D001407:Bacillus / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism*; D002076:Butirosin Sulfate / Q000096:biosynthesis* / Q000737:chemistry; D016386:Chromosome Walking; D017353:Gene Deletion; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D005810:Multigene Family; D016366:Open Reading Frames / Q000235:genetics; D010957:Plasmids / Q000235:genetics; D016415:Sequence Alignment; D005680:gamma-Aminobutyric Acid / Q000031:analogs & derivatives* / Q000378:metabolism
chemical_list: C036974:4-amino-2-hydroxybutyric acid; D002076:Butirosin Sulfate; D005680:gamma-Aminobutyric Acid