: / GspD-like, N0 domain / GspD/PilQ family / Bacterial type II secretion system protein D signature. / Type II secretion system protein GspD, conserved site / : / NolW-like / NolW-like superfamily / Bacterial type II/III secretion system short domain / Type II/III secretion system / Bacterial type II and III secretion system protein 類似検索 - ドメイン・相同性
ジャーナル: Nat Commun / 年: 2021 タイトル: CryoEM structure of the outer membrane secretin channel pIV from the f1 filamentous bacteriophage. 著者: Rebecca Conners / Mathew McLaren / Urszula Łapińska / Kelly Sanders / M Rhia L Stone / Mark A T Blaskovich / Stefano Pagliara / Bertram Daum / Jasna Rakonjac / Vicki A M Gold / 要旨: The Ff family of filamentous bacteriophages infect gram-negative bacteria, but do not cause lysis of their host cell. Instead, new virions are extruded via the phage-encoded pIV protein, which has ...The Ff family of filamentous bacteriophages infect gram-negative bacteria, but do not cause lysis of their host cell. Instead, new virions are extruded via the phage-encoded pIV protein, which has homology with bacterial secretins. Here, we determine the structure of pIV from the f1 filamentous bacteriophage at 2.7 Å resolution by cryo-electron microscopy, the first near-atomic structure of a phage secretin. Fifteen f1 pIV subunits assemble to form a gated channel in the bacterial outer membrane, with associated soluble domains projecting into the periplasm. We model channel opening and propose a mechanism for phage egress. By single-cell microfluidics experiments, we demonstrate the potential for secretins such as pIV to be used as adjuvants to increase the uptake and efficacy of antibiotics in bacteria. Finally, we compare the f1 pIV structure to its homologues to reveal similarities and differences between phage and bacterial secretins.
EMPIAR-10807 (タイトル: CryoEM structure of the outer membrane secretin channel pIV from the f1 filamentous bacteriophage Data size: 7.0 TB Data #1: Micrographs of the secretin protein, pIV, from the f1 filamentous bacteriophage (dataset1) [micrographs - multiframe] Data #2: Micrographs of the secretin protein, pIV, from the f1 filamentous bacteriophage (dataset2) [micrographs - multiframe])