Journal
JOURNAL OF BIOSCIENCE AND BIOENGINEERING
Volume 101, Issue 2, Pages 198-201Publisher
SOC BIOSCIENCE BIOENGINEERING JAPAN
DOI: 10.1263/jbb.101.198
Keywords
endosialidase; polysialic acid; bacteriophage
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Bacteriophages infecting Escherichia coli K1 strains generally have endotype polysialic acid-degrading enzymes. We studied the digestion mechanism of a sialidase associated with the coliphage 63D using polysialic acid radiolabeled at its nonreducing end or reducing end. It was found that this enzyme preferentially recognizes the nonreducing end of polysialic acid, suggesting that the 63D associated sialidase does not randomly digest its substrate but acts like an exotype glycosidase.
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