期刊
CARBOHYDRATE POLYMERS
卷 97, 期 2, 页码 293-299出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2013.05.004
关键词
Coral-associated fungus; Penicillium commune; Extracellular polysaccharide; Preparation; Structure
资金
- Science and Technology Development Program of Shandong Province, China [2010GHY10509]
- National Natural Science Foundation of China [41076086]
The coral-associated fungus Penicillium commune produces an extracellular polysaccharide, FP2-1, when grown in potato dextrose-agar medium. FP2-1 was isolated from the fermented broth using anion-exchange and size-exclusion chromatography, and its structure was elucidated by chemical and spectroscopic analyses, including detailed nuclear magnetic resonance spectroscopy. The results showed that FP2-1 was a glucomannogalactan with a molar ratio of galactose, mannose and glucose of 3.9:1.9:1.0. Structure of FP2-1 may be represented, at an average, as a backbone of (1 -> 2)-linked alpha-mannopyranose with the every second residue substituted at position 6 by a pentasaccharide branch. The branches consist of four (1 -> 6)-linked beta-galactofuranose residues with terminal alpha-glucopyranose residue attached to the last galactofuranose residue at position 2. FP2-1 was a novel galactofuranose-containing extracellular polysaccharide differing from previously described extracellular polysaccharides. (C) 2013 Elsevier Ltd. All rights reserved.
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