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1. (Article ID: 669)
Guetta O, Milas M, Rinaudo M
Structure and properties of a bacterial polysaccharide from a Klebsiella strain (ATCC12657)
Biomacromolecules 4(5) (2003)
1372-1379
The chemical structure and the rheological behavior of the Klebsiella polysaccharide ATCC12657 was studied and compared with data described in the literature and obtained for similar polysaccharides. The acetylated polysaccharide presents in solution a normal viscoelastic behavior with no evidence of an ordered conformation whatever the experimental conditions are. The deacetylated form can induce the formation of physical gels, in the presence of salt excess or ethanol. Microcalorimetry, optical rotation, and rheology experiments demonstrate that a thermally reversible and highly cooperative conformational transition occurs at the same temperature than a sol-gel transition. The melting of the gel and the conformational transition temperatures are dependent on the nature of cations and ionic concentration, whereas the gel strength is only influenced by polymer concentration
conformation, structure, rheological, physical, Klebsiella, Bacterial polysaccharide, chemical structure, solution, concentration
NCBI PubMed ID: 12959608Journal NLM ID: 100892849Publisher: Washington, DC: American Chemical Society
Institutions: Centre de Recherche sur les Macromolecules Vegetales, CNRS, associated with Joseph Fourier University, BP 53, 38041 Grenoble Cedex 9, France
Methods: NMR, de-O-acetylation, optical rotation measurement, microcalorimetry, rheological measurements
The publication contains the following compound(s):
- Compound ID: 2064
|
b-D-Glcp-(1-4)-+
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-4)-a-D-GlcpA-(1-3)-a-L-Fucp2Ac-(1-3)-b-D-Glcp-(1- |
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Structure type: polymer chemical repeating unit
Compound class: CPS
Reference(s) to other database(s): GTC:G92405AA, GlycomeDB:
16060
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2. (Article ID: 992)
Molinaro A, De Castro C, Evidente A, Lanzetta R, Holst O, Parrilli M
Structural analysis of a novel putative capsular polysaccharides from Pseudomonas_Burkholderia caryophylli strain 2151
European Journal of Biochemistry 259(3) (1999)
887-891
A novel putative capsular polysaccharide consisting of D-Glcp and D-Fruf in the molar ratio of 1:1 was isolated as minor constituent from the lipopolysaccharide (LPS) fraction of Pseudomonas (Burkholderia) caryophylli. Its structure was determined, using mainly one- and two-dimensional NMR spectroscopy, as: →6)-α-D-Glcp-(1→1)-β-D-Fruf-(2→.
Lipopolysaccharide, capsular polysaccharide, Pseudomonas (Burkholderia) caryophylli, glucofructane
NCBI PubMed ID: 10092878Publication DOI: 10.1046/j.1432-1327.1999.00117.xJournal NLM ID: 0107600Publisher: Oxford, UK: Blackwell Science Ltd. on behalf of the Federation of European Biochemical Societies
Correspondence: parrilli
ununa.it
Institutions: Dipartimento Chimica Organica e Biologica, Universita di Napoli Federico II, Napoli, Italy, Division of Medical and Biochemical Biochemistry, Center for Medicine and Biological Sciences, Research Center Borstel, Germany
Methods: NMR
The publication contains the following compound(s):
- Compound ID: 2824
Structure type: polymer chemical repeating unit
Compound class: CPS, EPS
Reference(s) to other database(s): GTC:G84871IX, GlycomeDB:
25979
- Compound ID: 2825
Structure type: oligomer
Reference(s) to other database(s): GTC:G29696QA, GlycomeDB:
26049
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