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1. Compound ID: 3987
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Pyr-(2-6:2-4)-b-D-Glcp-(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-(1-3)-b-D-Galp-(1-4)-b-D-Glcp-(1- |
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Structure type: polymer chemical repeating unit
Trivial name: succinoglycan
Compound class: EPS
Contained glycoepitopes: IEDB_135614,IEDB_136044,IEDB_137472,IEDB_141794,IEDB_141806,IEDB_142487,IEDB_142488,IEDB_146664,IEDB_153543,IEDB_158555,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: 1474
Navarini L, Stredansky M, Matulová M, Bertocchi C "Production and characterization of an exopolysaccharide from Rhizobium hedysari HCNT 1" -
Biotechnology Letters 19(12) (1997) 1231-1234
Rhizobium hedysari strain HTCN 1 produces viscous fermentation broths due to the presence of exopolysaccharide (EPS) products. Production of these products has been studied by testing a wide range of C- and N-sources. The highest EPS yield (9.04 g/L) has been obtained after 7 days cultivation in shaken flask on mannitol and lysine. The isolated and purified EPS has been subjected to chemical identification by means of NMR and FTIR spectroscopies.
characterization, Rhizobia, Rhizobium, exopolysaccharide, production
Journal NLM ID: 8008051Publisher: Kluwer Academic Publishers
Institutions: POLY-tech s.c.a.r.l. and POLY-bios Research Centre, AREA Science Park, Padriciano 99, 1-34012, Trieste, Italy
Methods: NMR-2D, NMR, FTIR
- 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: 3097
Zevenhuizen LPTM, Faleschini P "Effect of the concentration of sodium chloride in the medium on the relative proportions of poly- and oligo-saccharides excreted by Rhizobium meliloti YE-2SL" -
Carbohydrate Research 209 (1991) 203-209
Rhizobium meliloti mutant strains have been found which, in the presence of low concentrations of NaCl, produce a galactoglucan instead of the usual succinoglycan. When grown in a mannitol-glutamic acid-salts medium, the principal products secreted by R. meliloti YE-2S1 were comparable quantities of succinoglycan repeating-units and galactoglucan. As NaCl was added progressively to the culture medium, the repeating units nearly completely disappeared and the galactoglucan was gradually replaced by a succinoglycan.
NCBI PubMed ID: 2036651Journal NLM ID: 0043535Publisher: Elsevier
Institutions: Department of Microbiology, Agricultural University, Wageningen, The Netherlands
- Article ID: 3101
Navarini L, Cesaro A, Ross-Murphy SB "Exopolysaccharides from Rhizobium meliloti YE-2 grown under different osmolarity conditions: viscoelastic properties" -
Carbohydrate Research 223 (1992) 227-234
Journal NLM ID: 0043535Publisher: Elsevier
Methods: viscosity measurement, capillary viscosimetry
- Article ID: 3123
Jansson PE, Kenne L, Lindberg B, Ljunggren H, Lönngren J, Ruden U, Svensson S "Demonstration of an octasaccharide repeating unit in the extracellular polysaccharide of Rhizobium meliloti by sequential degradation" -
Journal of the American Chemical Society 99(11) (1977) 3812-3815
The structure of the extracellular polysaccharide from Rhizobium meliloti, a microsymbiont in the nitrogen fixing symbiosis, has been investigated. The polysaccharide contains a terminal β-D-glucopyranosyl group with pyruvic acid ketalically linked to its 4 and 6 positions. After removal of this substituent from the methylated polysaccharide the four sugar residues in the side chain were removed sequentially by specific degradations; each of these steps involved oxidation, β-elimination by treatment with base, and, when necessary, acid hydrolysis under mild conditions. The result of each degradation was fol- lowed by trideuteriomethylation, hydrolysis, and analysis of the product by GLC/MS. The sequence of the sugar residues in the main chain was determined using a modified Smith degradation in which the polyalcohol, obtained after periodate oxidation-borohydride reduction, was methylated before the mild acid hydrolysis. As a result of these studies, it is concluded that the polysaccharide is composed of octasaccharide repeating units with the structure 25.
NCBI PubMed ID: 858877Publication DOI: 10.1021/ja00453a049Journal NLM ID: 7503056Publisher: American Chemical Society
Institutions: Department of Organic Chemistry, Arrhenius Laboratory, University of Stockholm, Stockholm, Sweden
Methods: methylation, periodate oxidation, acid hydrolysis, GLC, Smith degradation, GLC/MS
- Article ID: 3133
Uttaro AD, Ielpi L, Ugalde RA "Galactose metabolism in Rhizobiaceae: characterization of Agrobacterium tumefaciens exoB mutants" -
Journal of General Microbiology 139 (1993) 1055-1062
- Article ID: 3135
Battisti L, Lara JC, Leigh JA "Specific oligosaccharide form of the Rhizobium meliloti exopolysaccharide promotes nodule invasion in alfalfa" -
Proceedings of the National Academy of Sciences of the USA 89 (1992) 5625-5629
Journal NLM ID: 7505876Publisher: National Academy of Sciences
- Article ID: 4308
Harada T, Amemura A, Jansson P, Lindberg B "Comparative studies on polysaccharides elaborated by Rhizobium, Alcaligenes and Agrobacterium" -
Carbohydrate Research 77(1) (1979) 285-288
No abstract available
structure, Rhizobium, polysaccharides, extracellular, Agrobacterium, Comparative Study, Alcaligenes
NCBI PubMed ID: 519656Journal NLM ID: 0043535Publisher: Elsevier
Institutions: Institute of Scientijic and Industrial Research, Osaka University, Suita-shi, Osaka 56.5, Japan
Methods: 13C NMR, 1H NMR, methylation, sugar analysis, acid hydrolysis, GLC, carboxyl reduction, paper chromatography, enzymatic digestion
- Article ID: 4309
Harada T "Special bacterial polysaccharides and polysaccharases" -
Biochemical Society Symposium 48 (1983) 97-116
Alcaligenes faecalis var. myxogenes 10C3, which we isolated from soil, produces a water-soluble and an insoluble extracellular polysaccharide. The former (succinoglycan) is composed of glucose, galactose, pyruvic acid and succinic acid (molar proportions 7:1:1:1) with (β 1-3)-, (β 1-4)- and (β 1-6)-glucosidic linkages. The latter (curdlan) is composed entirely of (β 1-3)-linked D-glucose and forms a resilient firm gel when heated in suspension. The organism also produces extracellularly a repeating-unit octasaccharide of succinoglycan and cyclic (β 1-2)-D-glucan. These polymers or oligomers are also produced by many strains of Agrobacterium and Rhizobium. Spontaneous mutation in ability to produce these polysaccharides or oligosaccharides occurs in these strains. The structures of succinoglycan, and similar polymers containing riburonic acid or galactose as the end residue of the side chain, were elucidated by successive fragmentation with two special enzymes obtained from Cytophaga arvensicola followed by methylation analysis. It is interesting that the unit compound in the biosynthesis of succinoglycan is identical with the unit compound in the enzymic decomposition of the polymer. Studies on curdlan gel by X-ray, 13C n.m.r. and electron-microscopic analysis and other physicochemical methods showed that the molecular structure of curdlan changes from a single helix to a triple stranded helix on heat treatment at high temperature. Curdlan seems to be useful for making new types of jelly products and may also be useful in new procedures for food production. Interestingly, curdlan possesses marked antitumour activity. Extracellular isoamylase (EC 3.2.1.68; glycogen 6-glucanohydrolase) of Pseudomonas amyloderamosa SB 15, which we isolated from soil, is very useful for elucidation of the structure of amylopectin and glycogen, and also for the commercial production of amylose or maltose alone or in combination with beta-amylase. Maltose is useful as a sugar for injection, being better than glucose. Maltitol is easily produced from maltose by chemical reduction and is used as a low-calorie sweetener. The isoamylase is also effective for enhancing the production of glucose from starch by the action of glucoamylase.
bacterial polysaccharides, β-Glucans, Alcaligenes faecalis
NCBI PubMed ID: 6400487Journal NLM ID: 7506896Publisher: London: Portland Press
Institutions: Institute of Scientijic and Industrial Research, Osaka University, Suita-shi, Osaka 56.5 (Japan)
Methods: 13C NMR, 1H NMR, methylation, X-ray, sugar analysis, electron microscopy, enzymatic digestion
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2. Compound ID: 10299
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Pyr-(2-6:2-4)-b-D-Glcp-(1-3)-b-D-Glcp-(1-3)-b-D-Glcp-(1-6)-b-D-Glcp-(1-6)-+
|
-4)-b-D-Glcp-(1-4)-b-D-Glcp-(1-3)-b-D-Galp-(1-4)-b-D-Glcp-(1- |
Show graphically |
Structure type: polymer chemical repeating unit
; n=8
Trivial name: succinoglycan
Compound class: EPS
Contained glycoepitopes: IEDB_135614,IEDB_136044,IEDB_137472,IEDB_141794,IEDB_141806,IEDB_142487,IEDB_142488,IEDB_146664,IEDB_153543,IEDB_158555,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: 4267
Abe J, Amemura A, Harada T "An Endo-(1→6)-β-D-glucanase of Flavobacterium M64 Hydrolyzing the Octasaccharide Repeating Unit of Succinoglycan" -
Agricultural and Biological Chemistry 44(8) (1980) 1877-1884
An endo-(l→6)-β-D-glucanase capable of hydrolyzing octasaccharide to two tetrasaccharides was isolated from cells of Flavobacterium M64. The octasaccharide represents the repeating unit of succinoglycan (SG-D). One tetrasaccharide was composed of d-glucose, succinic acid and pyruvic acid (4:1:1, molar ratio), and the other was composed of D-glucose and D-galactose (3:1, molar ratio). This enzyme hydrolyzed the (l→6)-β-D-glucosidic linkage adjacent to the (1→6)-linked β-D-glucose residue in the octasaccharide repeating unit of succinoglycan and also hydrolyzed the octasaccharide repeating units of similar polysaccharides produced by many strains of Agrobacterium and Rhizobium species.
tetrasaccharide, succinoglycan, Flavobacterium, endo-β-D-glucanase
Publication DOI: 10.1080/00021369.1980.10864217Journal NLM ID: 0370452Publisher: Tokyo: Agricultural Chemical Society Of Japan
Institutions: Institute of Scientific and Industrial Research, Osaka University, Suita, Osaka 565, Japan
Methods: sugar analysis, deacylation, paper chromatography, enzyme assay, enzymatic digestion
- Article ID: 4314
Hisamatsu M, Abe J, Amemura A, Harada T "Structural Elucidation on Succinoglycan and Related Polysaccharides from Agrobacterium and Rhizobium by Fragmentation with Two Special b-D-Glycanases and Methylation Analysis" -
Agricultural and Biological Chemistry 44(5) (1980) 1049-1055
The structure of the extracellular acidic polysaccharide succinoglycan from Alcaligenes faecalis var. myxogenes 10C3 was elucidated by successive fragmentation of the polysaccharide with extracellular β-d-glycanase (succinoglycan depolymerase) and intracellular endo-β-(1→6)-d-glucanase of Flavobacterium sp. M64 into two tetrasaccharides via its octasaccharide repeating unit, and then methylation analysis and enzymic hydrolysis of the products. The extracellular acidic polysaccharides from Rhizobium meliloti, Agrobacterium radiobacter, Agrobacterium rhizogenes and Agrobacterium tumefaciens were also analyzed by this method and found to be identical with the polysaccharide from Alcaligenes faecalis var. myxogenes, irrespective of their modes of acylation. The structure was identical with that of extracellular polysaccharide from Rhizobium meliloti presented by Jansson et al. (J. Am. Chem. Soc., 99, 3812 (1977)), except for the occurrence of the succinic acid residue.
structure, extracellular polysaccharide, Rhizobium meliloti, Agrobacterium, succinoglycan, Alcaligenes
Publication DOI: 10.1080/00021369.1980.10864074Journal NLM ID: 0370452Publisher: Tokyo: Agricultural Chemical Society Of Japan
Institutions: Institute of Scientific and Industrial Research, Osaka University, Suita, Osaka 565, Japan
Methods: sugar analysis, acid hydrolysis, GLC, GC, paper chromatography, alkaline hydrolysis, enzymatic depolymerization, methyaltion
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