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. 1984 Dec;160(3):949–957. doi: 10.1128/jb.160.3.949-957.1984

Purification and characterization of a novel type of fimbriae from the oral anaerobe Bacteroides gingivalis.

F Yoshimura, K Takahashi, Y Nodasaka, T Suzuki
PMCID: PMC215801  PMID: 6150029

Abstract

Fimbriae and their constituent protein (fimbrilin) were purified to homogeneity from the bacterial wash fluid and cell lysate fraction, respectively, of Bacteroides gingivalis 381. Fimbriae, observed by negative staining, were curly, single-stranded filaments with a diameter of ca. 5 nm. The apparent molecular weight of the fimbrilin was 43,000. Fimbriae were resistant to sodium dodecyl sulfate denaturation at 70 degrees C. Heating at 100 degrees C in sodium dodecyl sulfate was needed to completely dissociate them to monomers of fimbrilin. Different sets of antigenic determinants seemed to be exposed on the surfaces of fimbriae and sodium dodecyl sulfate-denatured fimbrilin. Purified fimbriae did not show either hemagglutinating activity or hemagglutination inhibitory activity, although it has been inferred on the basis of circumstantial evidence that fimbriae are correlated to hemagglutinating activity of the organism. Hemagglutinin activity, however, was detected in culture supernatant, and this observation suggests that fimbriae of a different type or a lectin-like protein may be acting as hemagglutinin in B. gingivalis.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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