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1. (Article ID: 7900)
Mao W, Gao Y, Teng X, Zhu W, Chen Y, Zhao C, Li N, Wang C, Yan M, Shan J, Lin C, Guo T
Structural elucidation of an extracellular polysaccharide produced by the marine fungus Aspergillus versicolor
Carbohydrate Polymers 93(2) (2013)
478-483
A homogenous extracellular polysaccharide, designated AWP, was isolated from the fermented liquid of the marine fungus Aspergillus versicolor from the coral Cladiella sp. and purified by anion-exchange and size-exclusion chromatography (SEC). Chemical and spectroscopic analyses, including one- and two-dimensional nuclear magnetic resonance (1D and 2D NMR) spectroscopy showed that AWP consisted of glucose and mannose in a molar ratio of 8.6:1.0, and its average molecular weight was estimated to be 500kDa. AWP is a slightly branched extracellular polysaccharide. The backbone of AWP is mainly composed of (1→6)-linked α-D-glucopyranose residues, slightly branched by single α-d-mannopyranose units attached to the main chain at C-3 positions of the glucan backbone. The investigation demonstrated that AWP is a novel extracellular polysaccharide different from those of other marine microorganisms.
NMR, structure, extracellular polysaccharide, FTIR, Aspergillus versicolor, Marine fungus
NCBI PubMed ID: 23499086Publication DOI: 10.1016/j.carbpol.2012.12.047Journal NLM ID: 8307156Publisher: Elsevier
Correspondence: Mao W
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Institutions: Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China, College of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, China, National Oceanographic Center of Qingdao, Qingdao, China
Methods: 13C NMR, 1H NMR, GC-MS, GC, FTIR, ion-exchange chromatography, methylation analysis, SEC, dialysis, HPGPC, phenol-sulfuric acid assay, HMBC, HMQC, Lowry method
The publication contains the following compound(s):
- Compound ID: 19951
Structure type: polymer chemical repeating unit
Compound class: galactan
Reference(s) to other database(s): GTC:G47123VX
- Compound ID: 19952
Structure type: structural motif or average structure
Trivial name: mannan
- Compound ID: 19953
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a-D-Manp-(1-2)-a-D-Manp-(1-2)-a-D-Manp-(1-6)-+
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-2)-a-D-Manp-(1-6)-{{{-a-D-Glcp-(1-6)-}}}/n=6/-a-D-Glcp-(1- |
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Structure type: structural motif or average structure
Compound class: EPS
- Compound ID: 19950
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a-D-Manp-(1-3)-+
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-6)-{{{-a-D-Glcp-(1-6)-}}}/n=8/-a-D-Glcp-(1- |
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Structure type: polymer chemical repeating unit
; n=300; 500000
Compound class: EPS
Reference(s) to other database(s): GTC:G46371TZ
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