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Serotype‐Dependent Inhibition of Glucan Synthesis and Cell Adherence of Streptococcus mutans by Antibody against Glucosyltransferase of Serotype e S. mutans
Author(s) -
Hamada Shigeyuki,
Tai Stella,
Slade Hutton D.
Publication year - 1979
Publication title -
microbiology and immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.664
H-Index - 70
eISSN - 1348-0421
pISSN - 0385-5600
DOI - 10.1111/j.1348-0421.1979.tb00442.x
Subject(s) - streptococcus mutans , glucosyltransferase , antiserum , serotype , antibody , microbiology and biotechnology , biology , ammonium , adjuvant , glucan , tooth surface , enzyme , biochemistry , chemistry , bacteria , immunology , medicine , genetics , organic chemistry , orthodontics
A crude glucosyltransferase (GTase) preparation was obtained from the culture supernatant of Streptococcus mutans strain MT703 (serotype e ) by 50% ammonium sulphate precipitation. Antiserum specific against the GTase was prepared by immunizing rabbits intramuscularly with the GTase in Freund incomplete adjuvant, followed by GTase without adjuvant intravenously. Gamma globulin fractions of the antiserum and normal serum were partially purified by 1/3 saturated ammonium sulphate precipitation. The antibody strongly inhibited the GTase activity (>90%) of type c, e and f S. mutans , whereas the GTase of types a, d and g was not affected by the antibody. The GTase from type b S. mutans was slightly inhibited. The adherence of viable cells of type c, e , and f S. mutans to a glass surface due to synthesis of glucan by the cell‐associated GTase was also significantly inhibited by the antibody to the enzyme. These results suggest that type c, e , and f and types a, d , and g S. mutans can be separated into two major groups in terms of the immunological relationship of GTase.