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  • Title: Alpha-L-fucosidase from a soil bacterium.
    Author: Mortensson-Egnund K, Schöyen R, Howe C, Lee LT, Harboe A.
    Journal: J Bacteriol; 1969 Jun; 98(3):924-9. PubMed ID: 4239704.
    Abstract:
    Intracellular glycosidases were measured in cell-free extracts obtained by ultrasonic disruption of a gram-negative soil coccobacillus (Chase, 1938). From these extracts, alpha-l-fucosidase was purified about 120-fold by salting out with (NH(4))(2)SO(4), ion exchange chromatography, and gel filtration. The approximate molecular weight of the enzyme was 50,000; its pH optimum was 5. The enzyme was inhibited by l-fucose and split this sugar from a purified acid mucopolysaccharide from chicken chorioallantoic fluid. The acid mucopolysaccharide is identical with a component (host antigen) of the hemagglutinin of influenza virus. Its antigenic reactivity is altered by cell-free extracts of the bacterium, in which the responsible enzyme is thought to be an alpha-l-fucosidase.
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