The polysaccharide gum from Accia tortuosa

Pinto, Gladys León de; Martínez, Maritza; Bolaño, Luz Mila De; Rivas, Carlos; Ocando, Edgar

doi:10.1016/s0031-9422(97)00478-0

Cited by 18 publications

(10 citation statements)

References 12 publications

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“…These results suggest that the structure is a branched one with points of ramification on C-2 and/or C-6 of the 3-O-b-D-galactose residues. Nevertheless, the methylation data differ from those published previously (León de Pinto et al, 1998), which suggested the presence of a less ramified structure with ramification points at C-6 of the 3-O-galactose residues. In addition, they did not detect 2-O-linked arabinose.…”

Section: Methylation Analysis Of the Original Gumcontrasting

confidence: 99%

“…This composition of sugars differs from that reported before (León de Pinto et al, 1998) because it was difficult to separate galactose and mannose under the conditions employed using paper chromatography. The use of HPLC improved the resolution.…”

Section: Sugar Composition Of the Original Gumcontrasting

confidence: 91%

“…The identification of voucher specimens was confirmed by Dr. Lourdes Cárdenas de Guevara, a botanical taxonomist of the Universidad Central de Venezuela. The gum exudate was purified as described previously (León de Pinto et al, 1998).…”

Section: Origin and Purification Of Gum Samplesmentioning

confidence: 99%

“…Acacia tortuosa (Leguminosae), a tropical American specie, located in Venezuela, produces a clear gum, very soluble in water (León de Pinto, Martínez, De Bolaño, Rivas, & Ocando, 1998;León de Pinto, Martínez, Ortega, Villavicencio, & Rojas, 1993). Previous studies demonstrated that the gum contains mainly a polysaccharide and a proteinaceous material (Beltrán, León de Pinto, Martínez, & Rincón, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…3) galactan (León de Pinto et al, 1998). This nucleus also contains arabinose and uronic acid residues; the presence of these residues, vulnerable to periodate oxidation, requires a further study (León de Pinto et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

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New structural features of Acacia tortuosa gum exudate

et al. 2015

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Acacia tortuosa produces a clear gum, very soluble in water. Previous reports showed that it was constituted by four fractions, one of them an arabinogalactan-protein complex. The elucidation of the A. tortuosa gum structure by the combination of classical chemical methods, size exclusion chromatography and NMR spectroscopy, was the objective of this investigation. The data obtained show that the heteropolysaccharide is an arabinogalactan type II, highly ramified, with lateral chains at C-2 as well as at C-6 of the galactose 3-O residues; mono-O-substituted galactoses were not detected. There are residues of mannose, the arabinose, pyranose predominantly, is terminal and 2-O-linked. The abundance of the 4-O-methyl-α-d-glucuronic acid was not previously reported. The proteic fraction is probably represented by an arabinogalactan-protein complex that binds poorly with β-glucosyl Yariv reagent, and two glycoproteins. The NMR spectra suggest that the carbohydrate links to hydroxyproline through the galactose (galactosylation).

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Section: Methylation Analysis Of the Original Gumcontrasting

confidence: 99%

Section: Sugar Composition Of the Original Gumcontrasting

confidence: 91%

Section: Origin and Purification Of Gum Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations