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Article

Genes needed for the modification, polymerization, export, and processing of succinoglycan by Rhizobium meliloti: a model for succinoglycan biosynthesis

1 Nov 1993

Abstract excerpt

The major acidic exopolysaccharide of Rhizobium meliloti, termed succinoglycan, is required for nodule invasion and possibly nodule development. Succinoglycan is a polymer of octasaccharide subunits composed of one galactose residue, seven glucose residues, and acetyl, succinyl, and pyruvyl modifications, which is synthesized on an isoprenoid lipid carrier. A cluster of exo genes in R. meliloti are required for...

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Identifiers

PMID: 8226646
DOI: 10.1128/jb.175.21.7045-7055.1993

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Genes needed for the modification, polymerization, export, and processing of succinoglycan by Rhizobium meliloti: a model for succinoglycan biosynthesisPMID 8226646Read ↗

Family of glycosyl transferases needed for the synthesis of succinoglycan by Rhizobium meliloti.Semantic proximity Read ↗

The Rhizobium meliloti exoK gene and prsD/prsE/exsH genes are components of independent degradative pathways which contribute to production of low-molecular-weight succinoglycan.Semantic proximity Read ↗

Extension of the Rhizobium meliloti succinoglycan biosynthesis gene cluster: identification of the exsA gene encoding an ABC transporter protein, and the exsB gene which probably codes for a regulator of succinoglycan biosynthesis.Semantic proximity Read ↗

Low-molecular-weight succinoglycan is predominantly produced by Rhizobium meliloti strains carrying a mutated ExoP protein characterized by a periplasmic N-terminal domain and a missing C-terminal domain.Semantic proximity Read ↗

The succinyl and acetyl modifications of succinoglycan influence susceptibility of succinoglycan to cleavage by the Rhizobium meliloti glycanases ExoK and ExsH.Semantic proximity Read ↗

Succinoglycan is required for initiation and elongation of infection threads during nodulation of alfalfa by Rhizobium meliloti.Semantic proximity Read ↗

Specific oligosaccharide form of the Rhizobium meliloti exopolysaccharide promotes nodule invasion in alfalfa.Semantic proximity Read ↗

Rhizobium meliloti exoG and exoJ mutations affect the exoX-exoY system for modulation of exopolysaccharide production.Semantic proximity Read ↗

Molecular analysis of the Rhizobium meliloti mucR gene regulating the biosynthesis of the exopolysaccharides succinoglycan and galactoglucan.Semantic proximity Read ↗

The exoR gene of Rhizobium meliloti affects RNA levels of other exo genes but lacks homology to known transcriptional regulators.Semantic proximity Read ↗

The molecular weight distribution of succinoglycan produced by Sinorhizobium meliloti is influenced by specific tyrosine phosphorylation and ATPase activity of the cytoplasmic domain of the ExoP protein.Semantic proximity Read ↗

The succinoglycan endoglycanase encoded by exoK is required for efficient symbiosis of Sinorhizobium meliloti 1021 with the host plants Medicago truncatula and Medicago sativa (Alfalfa).Semantic proximity Read ↗

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