1995
DOI: 10.1094/mpmi-8-0267
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Molecular Analysis of the Rhizobium meliloti mucRGene Regulating the Biosynthesis of the Exopolysaccharides Succinoglycan and Galactoglucan

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Cited by 119 publications
(152 citation statements)
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“…This EPS is composed of an octasaccharide of repeat units containing one galactose and seven glucoses (Leigh et al, 1985;Reinhold et al, 1994). S. meliloti also has the ability to synthesise another exopolysaccharide, galactoglucan (EPS II), which is synthesized under low-phosphate conditions or when mutations in genes related to EPS I synthesis occur (Zhan et al, 1989;Zhan et al, 1991;Keller et al, 1995). EPS II is a disaccharide with repeat units composed of one glucose and one galactose (Zhan et al, 1989;Her et al, 1990) (Figure 2h).…”
Section: Exopolysaccharides Producedmentioning
confidence: 99%
“…This EPS is composed of an octasaccharide of repeat units containing one galactose and seven glucoses (Leigh et al, 1985;Reinhold et al, 1994). S. meliloti also has the ability to synthesise another exopolysaccharide, galactoglucan (EPS II), which is synthesized under low-phosphate conditions or when mutations in genes related to EPS I synthesis occur (Zhan et al, 1989;Zhan et al, 1991;Keller et al, 1995). EPS II is a disaccharide with repeat units composed of one glucose and one galactose (Zhan et al, 1989;Her et al, 1990) (Figure 2h).…”
Section: Exopolysaccharides Producedmentioning
confidence: 99%
“…Production of EPS II was also observed in the presence of a mutation in either of the regulatory genes expR (Glazebrook and Walker, 1989;Pellock et al, 2002) or mucR (Keller et al, 1995;Zhan et al, 1989) that are unlinked to the exp gene cluster. An additional regulatory gene, expG (mucS), was identified in the exp gene cluster (Astete and Leigh, 1996;Becker et al, 1997;R€ u uberg et al, 1999).…”
Section: Introductionmentioning
confidence: 97%
“…Their production is under control of a number of environmental signals, including phosphate concentrations and quorum sensing, and EPS play an important role in the establishment of an efficient symbiotic interaction with host plants as well (90,(130)(131)(132). A small transcriptional regulator with a C 2 H 2 zinc finger domain, MucR, has also been implicated in the regulation of both types of EPS in S. meliloti: MucR has a positive effect on the production of succinoglycan, by binding to a short DNA region upstream of exoH and exoY (involved in EPS I biosynthesis), whereas it represses EPS II production (133)(134)(135). The EPS II gene cluster contains four operons, wge, wga, wgd and wggR-wgcA (135,136).…”
Section: Regulation Of Mucoidy and Cell Densitymentioning
confidence: 99%