Structures of wall heterogalactomannans isolated from three genera of entomopathogenic fungi

Bernabé, Manuel; Salvachúa, Davinia; Jiménez‐Barbero, Jesús; Leal, Juan; Prieto, Alicia

doi:10.1016/j.funbio.2011.06.015

Cited by 26 publications

(16 citation statements)

References 39 publications

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“…The slight difference of chemical shifts for the 6-O substituted β-Galf residues indicated the location of different chemical environments. The assignment of these two residues was also confirmed by comparing with the value from literatures (Bernabé, Salvachúa, Jiménez-Barbero, Leal, & Prieto, 2011;Bi, et al, 2013;Górska-Frączek, et al, 2011;Prieto, et al, 1997).…”

Section: Nmr Spectroscopy Analysis Of the Galactomannansupporting

confidence: 69%

Structural characterization of an α-1, 6-linked galactomannan from natural Cordyceps sinensis

et al. 2018

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An α-1, 6-linked galactomannan was isolated and purified from natural Cordyceps sinensis. The fine structure analysis of this polysaccharide was elucidated based on partial acid hydrolysis, monosaccharide composition, methylation and 1D/2D nuclear magnetic resonance (NMR) spectroscopy. Monosaccharide composition analysis revealed that this polysaccharide was mainly composed of galactose (68.65%), glucose (6.65%) and mannose (24.02%). However, after partial acid hydrolysis the percentages of galactose, glucose and mannose were changed to 3.96%, 13.82% and 82.22%, respectively. The molecular weight of this polysaccharide was 7207. Methylation and NMR analysis revealed that this galactomannan had a highly branched structure, mainly consisted of a mannan skeleton and galactofuranosyl chains. The structure of galactofuranosyl part was formed by alternating (1 5)-lined β-Galf and (1 6)-liked β-Galf or a single (1 6)-liked β-Galf, attaching to the O-2 and O-4 of the mannose chain, and terminated at β-T-Galf. The mannan core was revealed by analyzing the partial acid hydrolysate of the galactomannan and the structure was composed of (1 6)-linked α-Manp backbone, with substituted at C-2 by short chains of 2substituted Manp or Galf branches.

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Section: Nmr Spectroscopy Analysis Of the Galactomannansupporting

confidence: 69%

Structural characterization of an α-1, 6-linked galactomannan from natural Cordyceps sinensis

et al. 2018

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“…Among the heteromannans isolated from mushrooms, it can be cited galactomannans (Bernabé, Salvachúa, Jiménez-Barbero, Leal, & Prieto, 2011;Giménez-Abián, Bernabé, Leal, Jiménez-Barbero, & Prieto, 2007), glucogalactomannans (Smiderle, Sassaki, Van Griensven, & Iacomini, 2013), and xylomannans . The later one presents a main chain composed of (1→3)-linked ␣-d-mannopyranose, while the others usually present main chains of (1→2)-and (1→6)-linked ␣-d-mannopyranose.…”

Section: Heteromannansmentioning

confidence: 99%

“…The xylomannan characterized by Smiderle et al (2006) is partially substituted at O-4 by terminal ␤-d-Xylp or (1→3)-linked ␤-d-Xylp groups. The galactomannans and glucogalactomannan isolated up to now (Bernabé et al, 2011;Giménez-Abián et al, 2007;Smiderle et al, 2013) present different configuration of side chains, containing monosaccharides such as ␣-d-Manp; ␣-d-Galp; ␣-d-Galf; ␣-d-GlcpA, and principally ␤-d-Galf. These units are common to Ascomycetes and some studies demonstrated that galactofuranose presence in epitopes is essential for virulence in several pathogenic organisms, which elicits diverse immune reactions .…”

Section: Heteromannansmentioning

confidence: 99%

Mushroom heteropolysaccharides: A review on their sources, structure and biological effects

Ruthes

Smiderle²,

Iacomini

2016

Carbohydrate Polymers

161

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“…This EPS has a chemical backbone of α-(1, 3)-D-mannan like hexasaccharide substituted with one β-(1, 2)-glucopyranosyluronic acid and six β-D-xylopyranosyl units. Bernabe et al reported an EPS production from Lecanicillium muscarium CBS 413.70C 62. The structural composition study suggests the presence of α-(1, 4)-glucopyranosyl units and α-(1, 6)- glucopyranosyl units.…”

Section: Compositions Of Eps Produced By Different Fungimentioning

confidence: 99%

Fungal Exopolysaccharide: Production, Composition and Applications

2013

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Fungal exopolysaccharides (EPSs) have been recognized as high value biomacromolecules for the last two decades. These products, including pullulan, scleroglucan, and botryosphaeran, have several applications in industries, pharmaceuticals, medicine, foods etc. Although fungal EPSs are highly relevant, to date information concerning fungal biosynthesis is scarce and an extensive search for new fugal species that can produce novel EPSs is still needed. In most cases, the molecular weight variations and sugar compositions of fungal EPSs are dependent to culture medium composition and different physical conditions provided during fermentation. An inclusive and illustrative review on fungal EPS is presented here. The general outline of the present work includes fungal EPS production, their compositions and applications. An emphasis is also given to listing out different fungal strains that can produce EPSs.

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Structures of wall heterogalactomannans isolated from three genera of entomopathogenic fungi

Cited by 26 publications

References 39 publications

Structural characterization of an α-1, 6-linked galactomannan from natural Cordyceps sinensis

Structural characterization of an α-1, 6-linked galactomannan from natural Cordyceps sinensis

Mushroom heteropolysaccharides: A review on their sources, structure and biological effects

Fungal Exopolysaccharide: Production, Composition and Applications

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