title: Structural and functional analysis of a putative gene cluster for palatinose transport on the linear chromosome of Agrobacterium tumefaciens MAFF301001.
abstract: We identified a putative pal gene cluster (palR, palE, palF, palG, palK, palA, and palB) in the plant-tumorigenic bacterium Agrobacterium tumefaciens MAFF301001; by sequencing analyses, this cluster was found to be involved in palatinose transport, and its functional importance was revealed by mutational analyses. The pal gene products were highly homologous to those of putative trehalose/maltose ABC-type transport systems but were not essential to bacterial growth on trehalose. Insertion mutations in the palK and palE genes showed the necessity of these genes for bacterial growth and chemotaxis with palatinose as the carbon source, but no inhibition of tumorigenesis was observed. Growth on trehalose and maltose was not influenced by the mutations.
authors.affiliation: Department of Biological Science, Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan.
authors.forename: Devika M
authors.initials: DM
authors.lastname: De Costa
authors.forename: Katsunori
authors.initials: K
authors.lastname: Suzuki
authors.forename: Kazuo
authors.initials: K
authors.lastname: Yoshida
mesh_terms: D018528:ATP-Binding Cassette Transporters / Q000235:genetics / Q000378:metabolism; D016960:Agrobacterium tumefaciens / Q000235:genetics* / Q000378:metabolism* / Q000472:pathogenicity; D001692:Biological Transport; D002455:Cell Division / Q000502:physiology; D002633:Chemotaxis / Q000235:genetics; D002876:Chromosomes, Bacterial; D004252:DNA Mutational Analysis; D015964:Gene Expression Regulation, Bacterial; D023061:Gene Order; D007534:Isomaltose / Q000031:analogs & derivatives* / Q000378:metabolism*; D008320:Maltose / Q000378:metabolism; D008969:Molecular Sequence Data; D005810:Multigene Family; D009997:Osmotic Pressure; D014199:Trehalose / Q000378:metabolism; D014774:Virulence / Q000235:genetics
chemical_list: D018528:ATP-Binding Cassette Transporters; D007534:Isomaltose; D008320:Maltose; D014199:Trehalose; C008189:isomaltulose