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-Structure paper
タイトル | In situ architecture, function, and evolution of a contractile injection system. |
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ジャーナル・号・ページ | Science, Vol. 357, Issue 6352, Page 713-717, Year 2017 |
掲載日 | 2017年8月18日 |
著者 | Désirée Böck / João M Medeiros / Han-Fei Tsao / Thomas Penz / Gregor L Weiss / Karin Aistleitner / Matthias Horn / Martin Pilhofer / |
PubMed 要旨 | Contractile injection systems mediate bacterial cell-cell interactions by a bacteriophage tail-like structure. In contrast to extracellular systems, the type 6 secretion system (T6SS) is defined by ...Contractile injection systems mediate bacterial cell-cell interactions by a bacteriophage tail-like structure. In contrast to extracellular systems, the type 6 secretion system (T6SS) is defined by intracellular localization and attachment to the cytoplasmic membrane. Here we used cryo-focused ion beam milling, electron cryotomography, and functional assays to study a T6SS in The in situ architecture revealed three modules, including a contractile sheath-tube, a baseplate, and an anchor. All modules showed conformational changes upon firing. Lateral baseplate interactions coordinated T6SSs in hexagonal arrays. The system mediated interactions with host membranes and may participate in phagosome escape. Evolutionary sequence analyses predicted that T6SSs are more widespread than previously thought. Our insights form the basis for understanding T6SS key concepts and exploring T6SS diversity. |
リンク | Science / PubMed:28818949 / PubMed Central |
手法 | EM (トモグラフィー) / EM (サブトモグラム平均) |
解像度 | 40.0 - 60.0 Å |
構造データ | EMDB-3791: EMDB-3793: EMDB-3794: EMDB-3795: EMDB-3796: EMDB-3797: EMDB-3798: EMDB-3799: EMDB-3800: EMDB-3801: |
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