Found 2 structures.
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1. Compound ID: 6516
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S-Pyr-(2-6:2-4)-+
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50%R-Pyr-(2-6:2-4)-b-D-Galp-(1-3)-b-D-Glcp-(1-3)-b-D-Glcp-(1-6)-b-D-Glcp-(1-6)-+
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-4)-b-D-Glcp-(1-4)-b-D-Glcp-(1-4)-b-D-Glcp-(1-3)-b-D-Galp-(1- |
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Structure type: polymer chemical repeating unit
Compound class: EPS
Contained glycoepitopes: IEDB_135614,IEDB_136044,IEDB_137472,IEDB_141794,IEDB_141806,IEDB_142487,IEDB_142488,IEDB_146664,IEDB_151771,IEDB_153543,IEDB_190606,IEDB_241101,IEDB_983931,SB_165,SB_166,SB_187,SB_192,SB_195,SB_6,SB_7,SB_88
The structure is contained in the following publication(s):
- Article ID: 1935
Morris VJ, Brownsey GJ, Gunning AP, Harris JE "Gelation of the extracellular polysaccharide produced by Agrobacterium rhizogenes" -
Carbohydrate Polymers 13 (1990) 221-225
It has been shown that the extracellular polysaccharide (EPS) produced by Agrobacterium rhizogenes will form thermoreversible gels. This EPS belongs to a family of polysaccharide structures all of which have the same backbone structure substituted with different side chains. The EPS produced by Rhizobium meliloti IFO 13336 also belongs to this family of structures and T. Harada (Biochem. Soc. Symp., 48 (1983) 97) has reported gelation of this polysaccharide. Thus it is possible that gelation is a common feature of this family of structures. Possible biological and ecological consequences of gelation are discussed.
structure, Rhizobium, Rhizobium leguminosarum, Agrobacterium, extracellular polysaccharides, ecological, gelation
Publication DOI: 10.1016/0144-8617(90)90085-7Journal NLM ID: 8307156Publisher: Elsevier
Institutions: AFRC Institute of Food Research, Norwich Laboratory, Norwich, UK
Methods: gelation, rheological study
- Article ID: 2946
Amemura A, Harada T "Structural studies on extracellular acidic polysaccharides secreted by three non-nodulating rhizobia" -
Carbohydrate Research 112(1) (1983) 85-93
The structures of extracellular, acidic polysaccharides from three non-nodulating rhizobia, Rhizobium trifolii AHU 1134, Rhizobium phaseoli AHU 1133, and Rhizobium lupini KLU were studied by a method involving successive fragmentation with specific two β-d-glycanases of Flavobacterium M64. These three polysaccharides are composed of repeating units of the octassacharide shown. Half of the terminal d-galactose residues are substituted by pyruvic acid acetal groups [formula; see text].
Publication DOI: 10.1016/0008-6215(83)88268-8Journal NLM ID: 0043535Publisher: Elsevier
Institutions: Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567 Japan
Methods: 1H NMR, methylation, GLC-MS, gel filtration, de-O-acylation, sugar analysis, GLC, Smith degradation, paper chromatography, enzymatic digestion, ion-exchange chromatography, depyruvylation
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2. Compound ID: 14657
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S-Pyr-(2-6:2-4)-+
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R-Pyr-(2-6:2-4)-b-D-Galp-(1-3)-b-D-Glcp-(1-3)-b-D-Glcp-(1-6)-b-D-Glcp-(1-6)-+
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-4)-b-D-Glcp-(1-4)-b-D-Glcp-(1-4)-b-D-Glcp-(1-3)-b-D-Galp-(1- |
Show graphically |
Structure type: polymer chemical repeating unit
Compound class: EPS
Contained glycoepitopes: IEDB_135614,IEDB_136044,IEDB_137472,IEDB_141794,IEDB_141806,IEDB_142487,IEDB_142488,IEDB_146664,IEDB_151771,IEDB_153543,IEDB_190606,IEDB_241101,IEDB_983931,SB_165,SB_166,SB_187,SB_192,SB_195,SB_6,SB_7,SB_88
The structure is contained in the following publication(s):
- Article ID: 5791
Knirel YA, Van Calsteren M "Bacterial exopolysaccharides" -
Book: Comprehensive Glycoscience: From Chemistry to Systems Biology. Reference Module in Chemistry, Molecular Sciences and Chemical Engineering (2021) 1-75
Bacterial extracellular polysaccharides are known as a cell-bound capsule, a sheath, or a slime, which is excreted into the environment. They play an important role in virulence of medical bacteria and plant-to-symbiont interaction and are used for serotyping of bacteria and production of vaccines. Some exopolysaccharides have commercial applications in industry, and claims of health benefits have been documented for an increasing number of them. Exopolysaccharides have diverse composition and structure, and some contain sugar and non-sugar components that are found in bacterial carbohydrates only. The present article provides an updated collection of the data on exopolysaccharides of various classes of gram-negative and gram-positive bacteria reported until the end of 2019. When known, biosynthesis pathways of exopolysaccharides are treated in a summary manner. References are made to structure and biosynthesis relatedness between exopolysaccharides of different bacterial taxa as well as between bacterial polysaccharides and mammalian glycosaminoglycans.
polysaccharide structure, Gram-negative bacteria, capsule, Biofilm, polysaccharide biosynthesis, gram-positive bacteria, Monosaccharide composition, Bacterial exopolysaccharide, non-sugar component
Publication DOI: 10.1016/B978-0-12-819475-1.00005-5Publisher: Elsevier
Correspondence: marie-rose.vancalsteren@canada.ca; yknirel@gmail.com
Editors: Barchi J, Kamerling H
Institutions: N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russia, Saint-Hyacinthe Research and Development Centre, Agriculture and Agri-Food Canada, Saint-Hyacinthe, QC, Canada
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