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Structure and antioxidant activity of an extracellular polysaccharide from coral-associated fungus, Aspergillus versicolor LCJ-5-4
- Source :
- Carbohydrate Polymers. 87:218-226
- Publication Year :
- 2012
- Publisher :
- Elsevier BV, 2012.
-
Abstract
- An extracellular polysaccharide AVP was isolated from the fermented broth of coral-associated fungus Aspergillus versicolor LCJ-5-4. AVP was a mannoglucan with molecular weight of about 7 kDa, and the molar ratio of glucose and mannose was 1.7:1.0. On the basis of detailed one- and two-dimensional nuclear magnetic resonance (1D and 2D NMR) spectroscopic analyses, the backbone of AVP was characterized to be composed of (1 → 6)-linked α- d -glucopyranose and (1 → 2)-linked α- d -mannopyranose units. The mannopyranose residues in the backbone were substituted mainly at C-6 by the side chain of (1 → 2)-linked α- d -mannopyranose trisaccharides units. The antioxidant activity of AVP was evaluated with the scavenging abilities on 1,1-diphenyl-2-picrylhydrazyl (DPPH), superoxide and hydroxyl radicals in vitro, and the results indicated that AVP had good antioxidant activity, especially scavenging ability on superoxide radicals. AVP was a novel extracellular polysaccharide with different structural characteristics from other extracellular polysaccharides and could be a potential source of antioxidant.
- Subjects :
- Antioxidant
Polymers and Plastics
DPPH
Superoxide
medicine.medical_treatment
Radical
Organic Chemistry
Mannose
chemistry.chemical_compound
chemistry
Biochemistry
Materials Chemistry
medicine
Aspergillus versicolor
Fermentation
Two-dimensional nuclear magnetic resonance spectroscopy
hormones, hormone substitutes, and hormone antagonists
Subjects
Details
- ISSN :
- 01448617
- Volume :
- 87
- Database :
- OpenAIRE
- Journal :
- Carbohydrate Polymers
- Accession number :
- edsair.doi.dedup.....c5e92e1c9a6b06f22f29946002ae53e4