Identification of a Two-Component Signal Transduction System Involved in Fimbriation of <i>Porphyromonas gingivalis</i>
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- Hayashi Jun-Ichiro
- Department of Periodontology, School of Dentistry, Aichi-Gakuin University
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- Nishikawa Kiyoshi
- Department of Microbiology, School of Dentistry, Aichi-Gakuin University
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- Hirano Risa
- Department of Microbiology, School of Dentistry, Aichi-Gakuin University
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- Noguchi Toshihide
- Department of Periodontology, School of Dentistry, Aichi-Gakuin University
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- Yoshimura Fuminobu
- Department of Microbiology, School of Dentistry, Aichi-Gakuin University
説明
Porphyromonas gingivalis, a periodontopathogen, is an oral anaerobic Gram-negative bacterium with numerous fimbriae on the cell surface. Fimbriae have been considered to be an important virulence factor in this organism. We analyzed the genomic DNA of transposon-induced, fimbria-deficient mutants derived from ATCC 33277 and found that seven independent mutants had transposon insertions within the same restriction fragment. Cloning and sequencing of the disrupted region from one of the mutants revealed two adjacent open reading frames (ORFs) which seemed to encode a two-component signal transduction system. We also found that six of the mutants had insertions in a gene, fimS, a homologue of the genes encoding sensor kinase, and that the insertion in the remaining one disrupted the gene immediately downstream, fimR, a homologue of the response regulator genes in other bacteria. These findings suggest that this two-component regulatory system is involved in fimbriation of P. gingivalis.
収録刊行物
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- MICROBIOLOGY and IMMUNOLOGY
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MICROBIOLOGY and IMMUNOLOGY 44 (4), 279-282, 2000
Center For Academic Publications Japan
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詳細情報 詳細情報について
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- CRID
- 1573950402848292096
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- NII論文ID
- 130003484849
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- ISSN
- 03855600
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- 本文言語コード
- en
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- データソース種別
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- CiNii Articles