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. 1987 Mar;55(3):810-5.
doi: 10.1128/iai.55.3.810-815.1987.

Recognition of carbohydrate and protein epitopes by monoclonal antibodies to a cell wall antigen from Streptococcus mutans

C G Mitchell, R Smith, T Lehner

Recognition of carbohydrate and protein epitopes by monoclonal antibodies to a cell wall antigen from Streptococcus mutans

C G Mitchell et al. Infect Immun. 1987 Mar.

Abstract

The nature of the determinants recognized by a panel of monoclonal antibodies (MAbs) raised against a cell wall antigen of Streptococcus mutans (SA I/II) was investigated. Mild periodate oxidation of SA I/II showed that MAbs Guy 1, 2, 3, and 5 recognized carbohydrate epitopes on the antigen. Glycosidases were used to identify the nature of the sugars involved in their binding. Treatment with beta-glucosidase inhibited the binding of Guy 1, 2, 3, and 5 by 90%. No competition was found for any of the MAbs between SA I/II and a series of carbohydrates, including the serotype c polysaccharide from S. mutans. The results show that MAbs Guy 1, 2, 3, and 5 recognize carbohydrate epitopes on SA I/II which are distinct from the serotype polysaccharide. The other MAbs recognized protein epitopes on SA I/II.

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