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M M Corsaro

Publications and source records attributed to M M Corsaro.

12 recordsLinked to original sources
PubMed1999

Structure determination of an exopolysaccharide from an alkaliphilic bacterium closely related to Bacillus spp.

An exopolysaccharide obtained from an alkaliphilic bacterium closely related to Bacillus spp. was found to contain D-galactopyranuronic acid (GalpA), 2,4-diacetamido-2,4,6-trideoxy-D-glucopyranose (QuipNAc4NAc), 2-acetamido-2-deoxy D-mannopyranuronic acid (ManpNAcA) and one uncommon unit of D-galactopyranuronic acid with the carboxyl group amide-linked to glycine [GalpA(Gly)]. The polysaccharide was studied by one-dimensional and two-dimensional 1H-NMR and 13C-NMR spectroscopy both on native polysaccharide and on monosaccharides and oligosaccharides obtained from methanolysis and from anhydrous HF solvolysis. The following linear structure of the repeating unit was established: -->3)-alpha-D-GalpA(Gly)-(1-->4)-beta-D-ManpNAcA-(1-->4)-alp ha-D-Galp A-(1-->3)-alpha-D-QuipNAc4NAc-(1-->. A preliminary phylogenetic assignment for the bacterium is also reported.

Bacillus↗
PubMed1998

Structural determination of the O-deacetylated O-chain of lipopolysaccharide from Burkholderia (Pseudomonas) cepacia strain PVFi-5A.

On the basis of chemical degradation methods and one-and two-dimensional 1H and 13C NMR experiments the novel following structure was established for the O-deacetylated repeating unit of the O-chain of the main Burkholderia (Pseudomonas) cepacia (strain PVFi-5A) lipopolysaccharide: -->4)-beta-D-GalpNAc-(1-->3)-alpha-D-Galp-(1-->6)-alpha-D-GlcpNAc-(1-->.

Burkholderia cepacia↗
PubMed1998

Chemical structure of two phytotoxic exopolysaccharides produced by Phomopsis foeniculi.

The two main exocellular polysaccharides produced in vitro by Phomopsis foeniculi, a fungal pathogen of fennel, were isolated and characterized by chemical and spectroscopic methods as a galactan with the known structure [-->6)-beta-D-Galf-(1-->5)-beta-D- Galf-(1-->5)-beta-D-Galf-(1-->]n and a mannan. The latter consists of a backbone of alpha-(1-->6)-linked mannopyranose units. Almost all of these are branched at the 2 position with arms containing 2- and 3-linked mannopyranose units. The crude polysaccharide fraction and its components, galactan and mannan, showed phytotoxic effects, i.e. chlorosis, necrosis and/or wilting, on fennel and on two non-host plants, tobacco and tomato.

Ascomycota↗
PubMed1997

Lipopolysaccharides from three phytopathogenic pseudomonads.

Analysis of the polysaccharide and lipid moieties of the lipopolysaccharides (LPSs) of the phytopathogenic bacteria, Pseudomonas amygdali and P. syringae pv. ciccaronei has demonstrated that for both bacteria, the O-chain consists of a tetrasaccharide repeating unit of three alpha-L-Rhap and one terminal nonreducing alpha-D-Fucp3NAc. Two of the rhamnosyl residues are 3-linked, the third one 2,3-linked. This structure had been previously found for the O-chains of three phytopathogenic strains of P. syringae subsp. savastanoi, but this is the first report on its occurrence in P. amygdali and P. syringae pv. ciccaronei. The results of the LPS lipid residue analysis made it possible to make some chemotaxonomic considerations and therefore classify P. amygdali as a chemotype, which is different from that of the other two bacteria examined.

Carbohydrate Conformation↗
PubMed1996

Structural investigation of the polysaccharide fraction from the mucilage of Diceroaryum zanguebaricum Merr.

The polysaccharide fraction from the mucilage of Dicerocaryum zanguebaricum (Pedaliaceae) appears to be mainly constituted of a chemically homogeneous polysaccharide. By NMR and chemical degradative methods its structure appeared to consist of alternate-->4)-beta-D-GlcpA-(1--> and -->2)-alpha-D-Man p-(1-->units. Single branch units of beta-D-Xyl p and alpha-D-Gal p are linked to the O-3 positions of Man p and a significant number of Glc pA residues.

Africa↗
PubMed1995

Polysaccharides from seeds of Strychnos species.

The chemical composition of polysaccharide fractions from Strychnos nux-vomica and S. innocua seeds and comparison with those from S. potatorum seeds are reported. The structural features of the galactomannans from the three Strychnos species are also discussed.

Carbohydrate Conformation↗
PubMed1994

Composition of the coagulant polysaccharide fraction from Strychnos potatorum seeds.

The composition of the coagulant polysaccharide fraction from Strychnos potatorum seeds is described. This fraction comprises a 1:1.7 mixture of a galactomannan and a galactan. The structure of these polysaccharides is also discussed. In addition, the coagulant properties of the polysaccharide fractions of two other Strychnos species, innocua and nux-vomica, have been assayed.

Carbohydrate Conformation↗
PubMed1994

Structural investigation of Ceratozamia spinosa mucilage.

The polysaccharide fraction from Ceratozamia spinosa appears to be made up mainly by a chemically homogeneous polysaccharide but with a wide range of molecular weight. By NMR and chemical degradative methods, it is shown to consist essentially of a backbone of alternate-->4)-beta-D-GlcpA-(1-->and-->2)-alpha-D-Manp-(1--> units. On the 4 position of the latter, beta-D-GlcpA residues are linked. End units of alpha-L-Araf, beta-D-Xylp, alpha-L-Rhap, and alpha-L-3-OMe-Rhap are linked to C-3 and/or C-4 positions of beta-D-GlcpA residues.

Adhesives↗
PubMed1994

Cycloartane glucosides from Juncus effusus.

Five new cycloartane glucosides, juncosides I-V, have been isolated from Juncus effusus. The structures have been determined on the basis of chemical and spectroscopic studies.

Carbohydrate Sequence↗
PubMed1993

Triterpenoid oligoglycosides from Chionodoxa luciliae.

Four minor novel oligoglycosides of triterpenes having a lanostane-type skeleton were isolated from the bulbs of Chionodoxa luciliae. The C30 skeleton of the aglycones has been found for the first time in Liliaceae and can be considered the metabolic precursor of the C29 eucosterol skeleton.

Carbohydrate Sequence↗
PubMed1993

Nortriterpenoid oligoglycosides from Chionodoxa luciliae.

Six new oligoglycosides of eucosterol derivatives were isolated from the bulbs of Chionodoxa luciliae Bossis. A chemotaxonomical relationship based on glycoside and homoisoflavanone content is revealed for some Muscari, Bellevalia, Chionodoxa and Scilla species.

Carbohydrate Sequence↗