Overproduction and increased molecular weight account for the symbiotic activity of the rkpZ-modified K polysaccharide from Sinorhizobium meliloti Rm1021
Sharypova LA, Chataigne G, Fraysse N, Becker A, Poinsot V (2006)
GLYCOBIOLOGY 16(12): 1181-1193.
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Autor*in
Sharypova, L. A.;
Chataigne, G.;
Fraysse, N.;
Becker, A.;
Poinsot, V.
Abstract / Bemerkung
K polysaccharides (KPSs) of Sinorhizobium meliloti strains are strain-specific surface polysaccharides analogous to the group II K antigens of Escherichia coli. The K(R)5 antigen of strain AK631 is a highly polymerized disaccharide of pseudaminic and glucuronic acids. During invasion of host plants, this K antigen is able to replace the structurally different exopolysaccharide succinoglycan (EPS I) and promotes the formation of a nitrogen-fixing (Fix(+)) symbiosis. The KPS of strain Rm1021 is a homopolymer of 3-deoxy-d-manno-2 octulosonic acid (Kdo). The Kdo polysaccharide is covalently linked to the lipid anchor, has a low molecular weight (LMW), and is symbiotically inactive. On introduction of the Rm41-specific rkpZ gene into strain Rm1021, a modified KPS is expressed that is able to substitute EPS I during symbiosis with the host plant. To better understand the nature of modification conferred by rkpZ, we performed a structural analysis of the KPS using nuclear magnetic resonance (NMR), electrospray ionization-mass spectrometry (ESI-MS), and gas chromatography (GC-MS). The modified KPS retained primary polyKdo structure, but its degree of polymerization (DP) and level of production were increased significantly. In contrast to the wild-type polyKdo, only a part of polyKdo was lipidated. Shorter polysaccharide chains were lipid-free, whereas longer polysaccharide chains were lipidated. Sinorhizobium meliloti Rm1021 was found to carry two paralogs of rkpZ. Both genes are involved in polyKdo production, but they only show partial functional activity as compared with the rkpZ of Rm41.
Stichworte
electrospray ionization-mass spectrometry;
rkpZ;
surface polysaccharide;
host invasion;
lipid anchor
Erscheinungsjahr
2006
Zeitschriftentitel
GLYCOBIOLOGY
Band
16
Ausgabe
12
Seite(n)
1181-1193
ISSN
0959-6658
eISSN
1460-2423
Page URI
https://pub.uni-bielefeld.de/record/1596913
Zitieren
Sharypova LA, Chataigne G, Fraysse N, Becker A, Poinsot V. Overproduction and increased molecular weight account for the symbiotic activity of the rkpZ-modified K polysaccharide from Sinorhizobium meliloti Rm1021. GLYCOBIOLOGY. 2006;16(12):1181-1193.
Sharypova, L. A., Chataigne, G., Fraysse, N., Becker, A., & Poinsot, V. (2006). Overproduction and increased molecular weight account for the symbiotic activity of the rkpZ-modified K polysaccharide from Sinorhizobium meliloti Rm1021. GLYCOBIOLOGY, 16(12), 1181-1193. https://doi.org/10.1093/glycob/cwl042
Sharypova, L. A., Chataigne, G., Fraysse, N., Becker, A., and Poinsot, V. 2006. “Overproduction and increased molecular weight account for the symbiotic activity of the rkpZ-modified K polysaccharide from Sinorhizobium meliloti Rm1021”. GLYCOBIOLOGY 16 (12): 1181-1193.
Sharypova, L. A., Chataigne, G., Fraysse, N., Becker, A., and Poinsot, V. (2006). Overproduction and increased molecular weight account for the symbiotic activity of the rkpZ-modified K polysaccharide from Sinorhizobium meliloti Rm1021. GLYCOBIOLOGY 16, 1181-1193.
Sharypova, L.A., et al., 2006. Overproduction and increased molecular weight account for the symbiotic activity of the rkpZ-modified K polysaccharide from Sinorhizobium meliloti Rm1021. GLYCOBIOLOGY, 16(12), p 1181-1193.
L.A. Sharypova, et al., “Overproduction and increased molecular weight account for the symbiotic activity of the rkpZ-modified K polysaccharide from Sinorhizobium meliloti Rm1021”, GLYCOBIOLOGY, vol. 16, 2006, pp. 1181-1193.
Sharypova, L.A., Chataigne, G., Fraysse, N., Becker, A., Poinsot, V.: Overproduction and increased molecular weight account for the symbiotic activity of the rkpZ-modified K polysaccharide from Sinorhizobium meliloti Rm1021. GLYCOBIOLOGY. 16, 1181-1193 (2006).
Sharypova, L. A., Chataigne, G., Fraysse, N., Becker, A., and Poinsot, V. “Overproduction and increased molecular weight account for the symbiotic activity of the rkpZ-modified K polysaccharide from Sinorhizobium meliloti Rm1021”. GLYCOBIOLOGY 16.12 (2006): 1181-1193.
Daten bereitgestellt von European Bioinformatics Institute (EBI)
9 Zitationen in Europe PMC
Daten bereitgestellt von Europe PubMed Central.
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The outer membrane protein TolC from Sinorhizobium meliloti affects protein secretion, polysaccharide biosynthesis, antimicrobial resistance, and symbiosis.
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PMID: 18533835
Cosme AM, Becker A, Santos MR, Sharypova LA, Santos PM, Moreira LM., Mol Plant Microbe Interact 21(7), 2008
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