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Article

Structure and biological roles of Sinorhizobium fredii HH103 exopolysaccharide.

PloS one - 1 Jan 2014

Rodríguez-Navarro Dulce N, Rodríguez-Carvajal Miguel A, Acosta-Jurado Sebastián, Soto María J, Margaret Isabel, Crespo-Rivas Juan C, Sanjuan Juan, Temprano Francisco, Gil-Serrano Antonio, Ruiz-Sainz José E, Vinardell José M

Abstract excerpt

Here we report that the structure of the Sinorhizobium fredii HH103 exopolysaccharide (EPS) is composed of glucose, galactose, glucuronic acid, pyruvic acid, in the ratios 5∶2∶2∶1 and is partially acetylated. A S. fredii HH103 exoA mutant (SVQ530), unable to produce EPS, not only forms nitrogen fixing nodules with soybean but also shows increased competitive capacity for nodule occupancy. Mutant SVQ530 is,...

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PMID: 25521500
DOI: 10.1371/journal.pone.0115391
PMCID: PMC4270759

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Source receipt: pubmed, retrieved 7 Sept 2026.

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Structure and biological roles of Sinorhizobium fredii HH103 exopolysaccharide.PMID 25521500Read ↗

The Sinorhizobium fredii HH103 lipopolysaccharide is not only relevant at early soybean nodulation stages but also for symbiosome stability in mature nodules.Semantic proximity Read ↗

Sinorhizobium fredii HH103 mutants affected in capsular polysaccharide (KPS) are impaired for nodulation with soybean and Cajanus cajan.Semantic proximity Read ↗

Exopolysaccharide is detrimental for the symbiotic performance of Sinorhizobium fredii HH103 mutants with a truncated lipopolysaccharide core.Semantic proximity Read ↗

Sinorhizobium fredii HH103 does not strictly require KPS and/or EPS to nodulate Glycyrrhiza uralensis, an indeterminate nodule-forming legume.Semantic proximity Read ↗

Genetic characterization of a mutant of Sinorhizobium fredii strain USDA208 with enhanced competitive ability for nodulation of soybean, Glycine max (L.) Merr.Semantic proximity Read ↗

The rkpU gene of Sinorhizobium fredii HH103 is required for bacterial K-antigen polysaccharide production and for efficient nodulation with soybean but not with cowpea.Semantic proximity Read ↗

Inactivation of the Sinorhizobium fredii HH103 rhcJ gene abolishes nodulation outer proteins (Nops) secretion and decreases the symbiotic capacity with soybean.Semantic proximity Read ↗

Sinorhizobium fredii HH103 cgs mutants are unable to nodulate determinate- and indeterminate nodule-forming legumes and overproduce an altered EPS.Semantic proximity Read ↗

A purL mutant of Sinorhizobium fredii HH103 is symbiotically defective and altered in its lipopolysaccharide.Semantic proximity Read ↗

Structural determination of a 5-O-methyl-deaminated neuraminic acid (Kdn)-containing polysaccharide isolated from Sinorhizobium fredii.Semantic proximity Read ↗

Altered exopolysaccharides of Bradyrhizobium japonicum mutants correlate with impaired soybean lectin binding, but not with effective nodule formation.Semantic proximity Read ↗

A pyrF auxotrophic mutant of Sinorhizobium fredii HH103 impaired in its symbiotic interactions with soybean and other legumes.Semantic proximity Read ↗

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