Functional analysis of adhesins and colonization factors produced by human pathogenic streptococci
Project/Area Number |
20390465
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Morphological basic dentistry
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Research Institution | Osaka University |
Principal Investigator |
KAWABATA Shigetada Osaka University, 大学院・歯学研究科, 教授 (50273694)
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Co-Investigator(Kenkyū-buntansha) |
TERAO Yutaka 大阪大学, 大学院・歯学研究科, 准教授 (50397717)
NAKATA Masanobu 大阪大学, 大学院・歯学研究科, 助教 (90444497)
SUMITOMO Tomoko 大阪大学, 大学院・歯学研究科, 助教 (50423421)
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Project Period (FY) |
2008 – 2010
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Project Status |
Completed (Fiscal Year 2010)
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Budget Amount *help |
¥19,370,000 (Direct Cost: ¥14,900,000、Indirect Cost: ¥4,470,000)
Fiscal Year 2010: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2009: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2008: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000)
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Keywords | レンサ球菌 / 線毛 / 付着因子 / 定着因子 / 組織指向性 |
Research Abstract |
The human pathogen Streptococcus pyogenes produces diverse pili depending on the serotype. In a serotype M49 S. pyogenes strain, we demonstrate that FctA is the pilus backbone protein, and FctB and Cpa, a collagen-binding adhesin, are ancillary proteins. We also found that both Cpa and FctA are trypsin-resistant T antigens. Mutagenesis assays and eukaryotic cell adherence tests revealed that FctB and housekeeping sortase SrtA contribute to the cell wall anchoring of pili, whereas Cpa functions as a pilus adhesin to human keratinocytes. Sortase C2 and putative signal peptidase LepA enzymes were crucial for polymerization of FctA. The pilus expression increased with lower temperature. The ability to form biofilms was not affected by the mutation of the pilus genes. In contrast to the M49 pili, pili of a serotype M6 S. pyogenes strain were found to be assembled from two proteins, i.e. the backbone protein T6 and ancillary protein FctX, in a manner that requires both SrtA and pilus-associated sortase SrtB. We found that T6 pili contribute to biofilm formation, but not to adherence to human keratinocytes under the condition used in this study. These data suggest the serotype-dependent pilus assembly mechanism and contribution of S. pyogenes pili to the tissue tropism.
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Report
(4 results)
Research Products
(118 results)
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[Journal Article] Pili of oral Streptococcus sanguinis bind to salivary amylase and promote the biofilm formation.2011
Author(s)
Okahashi N, Nakata M, Terao Y, Isoda R, Sakurai A, Sumitomo T, Yamaguchi M, Kimura RK, Oiki E, Kawabata S, Ooshima T.
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Journal Title
Microb Pathog 50(3-4)
Pages: 148-154
Related Report
Peer Reviewed
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[Journal Article] Streptolysin S contributes to group A streptococcal translocation across an epithelial barrier2011
Author(s)
Sumitomo, T., Nakata, M., Higashino, M., Jin, Y., Terao, Y., Fujinaga, Y., Kawabata, S.
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Journal Title
Journal of Biological Chemistry
Volume: 286
Pages: 2750-2761
Related Report
Peer Reviewed
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[Journal Article] Pili of oral Streptococcus sanguinis bind to salivary amylase and promote the biofilm formation2011
Author(s)
Okahashi, N., Nakata, M., Terao, Y., Isoda, R., Sakurai, A., Sumitomo, T., Yamaguchi, M., Kimura, R.K., Oiki, E., Kawabata, S., Ooshima, T.
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Journal Title
Microbial Pathogenesis
Volume: 50
Pages: 148-154
Related Report
Peer Reviewed
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[Journal Article] Inhibitory effects of oenothera biennis (evering primrose) seed extract on Streptococcus mutans and S.mutans-induced dental caries in rats.2011
Author(s)
Matsumoto-Nakano, M., Nagayama, K., Kitagori, H., Fujita, K., Inagaki, S., Takashima, Y., Tamesada, M., Kawabata, S., Ooshima, T.
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Journal Title
Caries Research
Volume: 45
Pages: 56-63
Related Report
Peer Reviewed
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[Journal Article] Epidemiological characterization of Streptococcus pyogenes isolated from patients with multiple onsets of pharyngitis.2011
Author(s)
Ogawa, T., Terao, Y., Sakata, H., Ohkuni, H., Ninomiya, K., Ikebe, K., Maeda, Y., Kawabata, S.
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Journal Title
FEMS Microbiology Letters
Volume: (未定)
Related Report
Peer Reviewed
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[Journal Article] Pili of oral Streptococcus sanguinis bind to fibronectin and contribute to cell adhesion.2010
Author(s)
Okahashi N, Nakata M, Sakurai A, Terao Y, Hoshino T, Yamaguchi M, Isoda R, Sumitomo T, Nakano K, Kawabata S, Ooshima T.
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Journal Title
Biochem Biophys Res Commun 391(2)
Pages: 1192-1196
Related Report
Peer Reviewed
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[Journal Article] Mode of expression and functional characterization of FCT-3 pilus region encoded proteins in the Streptococcus pyogenes serotype M49.2009
Author(s)
Nakata M, Koller T, Moritz K, Ribardo D, Jonas L, McIver KS, Sumitomo T, Terao Y, Kawabata S, Podbielski A, Kreikemeyer B.
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Journal Title
Infect Immun 77(1)
Pages: 32-44
Related Report
Peer Reviewed
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[Journal Article]2009
Author(s)
寺尾豊
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Journal Title
蛋白質核酸酵素増刊号-感染現象その理解の深化から疾患制御への展望-(共立出版)
Pages: 982-9
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[Presentation] Streptococcus pneumoniae evades neutrophil phagocytosis through its surface protein PfbA.2010
Author(s)
Yamaguchi, M., Terao, Y., Nishino, K., Yamaguchi, A., Hamada, S., Kawabata, S.
Organizer
110th General Meeting of American Society for Microbiology
Place of Presentation
San Diego Convention Center(USA)
Related Report
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[Presentation] 再発性咽頭炎患者より分離されたA群レンサ球菌の分子解析に基づく新規治療法の提案2010
Author(s)
小川泰治, 寺尾豊, 大国壽士, 二宮恵子, 坂田宏, 入江正寛, 本間信夫, 中野正大, 明貝路子, 浜田茂幸, 川端重忠
Organizer
第19回Lancefieldレンサ球菌研究会/第42回レンサ球菌感染症研究会合同開催
Place of Presentation
国立国際医療センター研究所(東京都)
Related Report
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[Presentation] Characterization of Streptococcus pyogenes isolated from patients with recurrent pharyngitis.2010
Author(s)
Ogawa, T., Terao, Y., Ohkuni, H., Ninomiya, K., Sakata, H., Ikebe, K., Maeda, Y., Kawabata., S.
Organizer
88th General Session & Exhibition of the International Association for Dental Research
Place of Presentation
Centre Convencions Internacional Barcelona(Spain)
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