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. 1994 May;62(5):1749–1754. doi: 10.1128/iai.62.5.1749-1754.1994

Characterization of fibrinolytic activities of Treponema denticola.

G Rosen 1, R Naor 1, S Kutner 1, M N Sela 1
PMCID: PMC186400  PMID: 8168936

Abstract

Several fibrinolytic activities of Treponema denticola, an oral spirochete associated with gingivitis and periodontal disease, were identified and characterized following phase partitioning with the nonionic detergent Triton X-114. The apparent molecular masses of the proteases ranged from 91 to 228 kDa when analyzed in sodium dodecyl sulfate-polyacrylamide gels containing fibrinogen as the protease substrate. A qualitative analysis of zymograms showed that the proteases were highly enriched in the detergent phase, although the 91-, 173-, and 228-kDa proteases were also found in the aqueous phase. Zymograms of crude outer sheaths prepared by repeated freezing-thawing revealed that the proteases may be associated with this subcellular compartment. The proteases displayed substrate specificity towards fibrinogen, were susceptible to sulfhydryl group reagents, and had a pH optimum between 7 and 8. The similarities in their sensitivity to inhibitors, temperature stability, pH optimum, and laddered protein profiles suggest that these hydrolytic enzymes may be part of a family of oligomeric proteases that may play an important role in the invasiveness of and tissue damage caused by the spirochete.

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

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