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Antimicrobial Agents and Chemotherapy, September 2000, p. 2578-2580, Vol. 44, No. 9
0066-4804/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Inhibitory Effects of Plant Polyphenoloxidase on Colonization Factors of Streptococcus sobrinus 6715

M. M. Cowan,1,* E. A. Horst,1 S. Luengpailin,2 and R. J. Doyle2

Department of Microbiology, Miami University, Oxford, Ohio 45056,1 and Department of Microbiology and Immunology, Health Sciences Center, University of Louisville, Louisville, Kentucky 402922

Received 10 January 2000/Returned for modification 13 April 2000/Accepted 13 June 2000

Exogenously added polyphenoloxidase (EC 1.14.18.1), an enzyme which oxidizes tyrosine residues and is commonly found in many dietary components, abolished the aggregation of Streptococcus sobrinus 6715 by high-molecular-weight dextran. The enzyme decreased glucan-binding lectin and/or glucosyltransferase I activities.

* Corresponding author. Mailing address: Department of Microbiology, Miami University, Oxford, OH 45056. Phone: (513) 727-3231. Fax: (513) 727-3367. E-mail: cowanmm{at}muohio.edu.

Antimicrobial Agents and Chemotherapy, September 2000, p. 2578-2580, Vol. 44, No. 9
0066-4804/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.




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