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- W2070436124 abstract "alpha-L-Fucosidases were found in the culture fluid of Streptomyces sp. OH11242 grown with porcine gastric mucin (PGM) as the sole carbon source. The alpha-L-fucosidases were purified by ammonium sulfate precipitation followed by chromatography on Sepharose CL-4B, hydroxyapatite, Resource Q and Mono Q. Two enzyme fractions, termed Fase-I and Fase-II, were obtained, each bearing different substrate specificity. Fase-I hydrolyzed fucose residues from fucose-containing oligosaccharide chains on PGM, but not p-nitrophenyl alpha-L-fucoside (Fucalpha-O-PNP). In contrast, Fase-II cleaved fucose from Fucalpha-O-PNP, but not fucose-containing oligosaccharides on PGM. Fase-I also hydrolyzed the alpha1-2 fucosidic linkage in various oligosaccharides, but not alpha1-3 and alpha1-4 fucosidic linkages. Fase-II was separated into two fractions, Fase-IIa and -IIb by Mono Q chromatography, Fase-IIb hydrolyzed alpha1-3 and alpha1-4 fucosidic linkages, but not alpha1-2 fucosidic linkages, while Fase-IIa hydrolyzed none of them. Fase-I was purified to homogeneity by SDS-polyacrylamide gel electrophoresis, the molecular mass was estimated to be approximately 59000 and 76000 Da by SDS-PAGE and gel-permeation chromatography, respectively. The optimum pH for Fase-I activity was 5.5-6.0. These fucosidases with different substrate specificities might be useful to reveal the physiological role of fucose-containing oligosaccharides in the gastric mucins." @default.
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- W2070436124 date "2001-10-01" @default.
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- W2070436124 title "Purification and characterization of α-l-fucosidases from Streptomyces sp. OH11242" @default.
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- W2070436124 doi "https://doi.org/10.1016/s1096-4959(01)00442-0" @default.
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