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The Journal of Medical Microbiology, Vol 40, Issue 1 62-69, Copyright © 1994 by Society for General Microbiology

JOURNAL ARTICLE

Outer membrane antigens of oral Treponema species

B. D. Tall and R. K. Nauman
Department of Microbiology, University of Maryland Dental School, Baltimore 21201.

Outer membrane (OM) antigens of several oral treponemes were studied. SDS-PAGE revealed a 56-58-kDa protein as a major component of isolated OM vesicles. Immunoblot analysis with eluted antibodies prepared from Treponema denticola ATCC 33520 recognised the 56-58-kDa protein, which was highly conserved in the 17 T. denticola strains tested. The protein was also a component of a T. denticola desoxycholate-extractable, ethanol-soluble antigen (DES-Ag) but was not present in T. pectinovorum or T. vincentii ATCC 35580 and strain N9 whole-cell lysates. Electronmicroscopy of OM vesicles showed typical treponemal ultrastructure. Immunogold labelling of T. denticola ATCC 33520 with T. denticola ATCC 33520-specific eluted antibodies recognised only the OM surface of the cell. These results suggest that the 56-58-kDa antigen comprises surface-orientated epitopes and that this antigen may be specific for T. denticola.


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