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Tetratricopeptide repeat protein-associated proteins contribute to the virulence of Porphyromonas gingivalis.


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タイトル: Tetratricopeptide repeat protein-associated proteins contribute to the virulence of Porphyromonas gingivalis.
著者: Kondo, Yoshio / Ohara, Naoya / Sato, Keiko / Yoshimura, Mamiko / Yukitake, Hideharu / Naito, Mariko / Fujiwara, Taku / Nakayama, Koji
発行日: 2010年 6月
出版者: American Society for Microbiology
引用: Infection and immunity, 78(6), pp.2846-2856; 2010
抄録: Porphyromonas gingivalis is one of the most etiologically important microorganisms in periodontal disease. We found in a previous study that PG1385 (TprA) protein, a tetratricopeptide repeat (TPR) protein, was upregulated in P. gingivalis wild-type cells placed in a mouse subcutaneous chamber and that a tprA mutant was clearly less virulent in the mouse subcutaneous abscess model (M. Yoshimura et al., Oral Microbiol. Immunol. 23:413-418, 2008). In the present study, we investigated the gene expression profile of tprA mutant cells placed in a mouse subcutaneous chamber and found that 9 genes, including PG2102 (tapA), PG2101 (tapB), and PG2100 (tapC) genes, were downregulated in the tprA mutant compared with those in the wild type. Expression of a cluster of tapA, tapB, and tapC genes of the mutant was also downregulated in an in vitro culture with enriched brain heart infusion medium. The TprA protein has three TPR motifs known as a protein-protein interaction module. Yeast two-hybrid system analysis and in vitro protein binding assays with immunoprecipitation and surface plasmon resonance detection revealed that the TprA protein could bind to TapA and TapB proteins. TprA and TapB proteins were located in the periplasmic space, whereas TapA, which appeared to be one of the C-terminal domain family proteins, was located at the outer membrane. We constructed tapA, tapB, and tapC single mutants and a tapA-tapB-tapC deletion mutant. In the mouse subcutaneous infection experiment, all of the mutants were less virulent than the wild type. These results suggest that TprA, TapA, TapB, and TapC are cooperatively involved in P. gingivalis virulence.
URI: http://hdl.handle.net/10069/24545
ISSN: 00199567
DOI: 10.1128/IAI.01448-09
PubMed ID: 20351137
権利: Copyright © 2010, American Society for Microbiology. All Rights Reserved.
資料タイプ: Journal Article
原稿種類: author
出現コレクション:040 学術雑誌論文

引用URI : http://hdl.handle.net/10069/24545

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