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-Structure paper
| タイトル | The Vibrio cholerae colonization factor GbpA possesses a modular structure that governs binding to different host surfaces. |
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| ジャーナル・号・ページ | PLoS Pathog, Vol. 8, Issue 1, Page e1002373, Year 2012 |
| 掲載日 | 2012年1月12日 |
著者 | Edmond Wong / Gustav Vaaje-Kolstad / Avishek Ghosh / Ramon Hurtado-Guerrero / Peter V Konarev / Adel F M Ibrahim / Dmitri I Svergun / Vincent G H Eijsink / Nabendu S Chatterjee / Daan M F van Aalten / ![]() |
| PubMed 要旨 | Vibrio cholerae is a bacterial pathogen that colonizes the chitinous exoskeleton of zooplankton as well as the human gastrointestinal tract. Colonization of these different niches involves an N- ...Vibrio cholerae is a bacterial pathogen that colonizes the chitinous exoskeleton of zooplankton as well as the human gastrointestinal tract. Colonization of these different niches involves an N-acetylglucosamine binding protein (GbpA) that has been reported to mediate bacterial attachment to both marine chitin and mammalian intestinal mucin through an unknown molecular mechanism. We report structural studies that reveal that GbpA possesses an unusual, elongated, four-domain structure, with domains 1 and 4 showing structural homology to chitin binding domains. A glycan screen revealed that GbpA binds to GlcNAc oligosaccharides. Structure-guided GbpA truncation mutants show that domains 1 and 4 of GbpA interact with chitin in vitro, whereas in vivo complementation studies reveal that domain 1 is also crucial for mucin binding and intestinal colonization. Bacterial binding studies show that domains 2 and 3 bind to the V. cholerae surface. Finally, mouse virulence assays show that only the first three domains of GbpA are required for colonization. These results explain how GbpA provides structural/functional modular interactions between V. cholerae, intestinal epithelium and chitinous exoskeletons. |
リンク | PLoS Pathog / PubMed:22253590 / PubMed Central |
| 手法 | SAS (X-ray synchrotron) / X線回折 |
| 解像度 | 1.8 Å |
| 構造データ | ![]() SASDAA4: ![]() SASDAB4: ![]() PDB-2xwx: |
| 化合物 | ![]() ChemComp-HOH: |
| 由来 |
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キーワード | CHITIN-BINDING PROTEIN |
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