Regulation of succinoglycan and galactoglucan biosynthesis in Sinorhizobium meliloti.
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.
Becker
Anke
A
Lehrstuhl für Genetik, Fakultät für Biologie, Universität Bielefeld, Germany. anke.becker@genetik.uni-bielfeld.de
Rüberg
Silvia
S
Baumgarth
Birgit
B
Bertram-Drogatz
Peter Alexander
PA
Quester
Ingmar
I
Pühler
Alfred
A
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
D001426:Bacterial Proteins; D005685:Galactans; D005936:Glucans; D011135:Polysaccharides, Bacterial; C093768:galactoglucan; C056779:succinoglycan