Molecular basis for the association of glucosyltransferases with the cell surface of oral streptococci.

Abstract excerpt

The expression of Streptococcus mutans mutant glucosyltransferase-I enzymes in S. sanguis and S. milleri suggests that cell-associated glucosyltransferase activity is dependent upon both glucan synthesis and glucan binding by the carboxyl-terminal repeating units of the enzyme. Mutant enzymes lacking these repeating units were only present in the extracellular fluids of these transformed streptococcal strains.

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