title: Regulation of succinoglycan and galactoglucan biosynthesis in Sinorhizobium meliloti.
abstract: Sinorhizobium meliloti (Rhizobium meliloti) 2011 has the ability to produce the two acidic exopolysaccharides succinoglycan (EPS I) and galactoglucan (EPS II). EPS I is a branched heteropolysaccharide composed of octasaccharide repeating units, whereas EPS II is a linear heteropolysaccharide consisting of disaccharide subunits. The exo-exs and exp gene clusters are involved in the biosynthesis of EPSI and EPSII, respectively. EPSI and EPSII biosynthesis genes are differentially expressed resulting in a complex regulation of EPS production in S. meliloti. The phosphate concentration was identified as an important factor affecting the expression of exp genes.
authors.affiliation: Lehrstuhl für Genetik, Fakultät für Biologie, Universität Bielefeld, Germany. anke.becker@genetik.uni-bielfeld.de
authors.forename: Anke
authors.initials: A
authors.lastname: Becker
authors.forename: Silvia
authors.initials: S
authors.lastname: Rüberg
authors.forename: Birgit
authors.initials: B
authors.lastname: Baumgarth
authors.forename: Peter Alexander
authors.initials: PA
authors.lastname: Bertram-Drogatz
authors.forename: Ingmar
authors.initials: I
authors.lastname: Quester
authors.forename: Alfred
authors.initials: A
authors.lastname: Pühler
mesh_terms: D001426:Bacterial Proteins / Q000235:genetics* / Q000378:metabolism; D005685:Galactans; D015964:Gene Expression Regulation, Bacterial; D005798:Genes, Bacterial; D005936:Glucans; D005810:Multigene Family; D011135:Polysaccharides, Bacterial / Q000096:biosynthesis*; D016962:Sinorhizobium meliloti / Q000235:genetics / Q000254:growth & development / Q000378:metabolism*; D014158:Transcription, Genetic
chemical_list: D001426:Bacterial Proteins; D005685:Galactans; D005936:Glucans; D011135:Polysaccharides, Bacterial; C093768:galactoglucan; C056779:succinoglycan