- EMDB-5720: Structure of the Yersinia enterocolitica secretin YscC -
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基本情報
登録情報
データベース: EMDB / ID: EMD-5720
タイトル
Structure of the Yersinia enterocolitica secretin YscC
マップデータ
Reconstruction of YscC secretin
試料
試料: YscC secretin from Yersinia enterocolitica
タンパク質・ペプチド: YscC secretin
キーワード
type III secretion system / Yersinia enterocolitica / Gram-negative bacteria / YscC / secretin / cryo-electron microscopy / outer membrane
機能・相同性
機能・相同性情報
type III protein secretion system complex / type II protein secretion system complex / protein secretion by the type III secretion system / cell outer membrane / identical protein binding 類似検索 - 分子機能
: / SPI-1 type 3 secretion system secretin, N0 domain / Type III secretion system outer membrane pore YscC/HrcC / 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: Structure / 年: 2013 タイトル: Structure of the dodecameric Yersinia enterocolitica secretin YscC and its trypsin-resistant core. 著者: Julia Kowal / Mohamed Chami / Philippe Ringler / Shirley A Müller / Mikhail Kudryashev / Daniel Castaño-Díez / Marlise Amstutz / Guy R Cornelis / Henning Stahlberg / Andreas Engel / 要旨: The type III secretion system machinery, also known as the injectisome, delivers bacterial effector proteins into eukaryotic cells during infection. The outer membrane YscC secretin is a major part ...The type III secretion system machinery, also known as the injectisome, delivers bacterial effector proteins into eukaryotic cells during infection. The outer membrane YscC secretin is a major part of Yersinia enterocolitica's injectisome and is among the first components to assemble, solely assisted by its pilotin, YscW. We have determined the three-dimensional structures of the native complex and its protease-resistant core to 12 Å resolution by cryo-electron microscopy (cryo-EM) and show that YscC forms a dodecameric complex. Cryo-EM of YscC reconstituted into proteoliposomes defines the secretin's membrane-spanning region. Native YscC consists of an outer membrane ring connected via a thin cylindrical wall to a conical, periplasmic region that exposes N-terminal petals connected by flexible linkers. These petals harbor the binding site of YscD, a component of the inner membrane ring. A change in their orientation adapts the length of the YscC secretin and facilitates its interaction with YscD.
Particles were selected using Boxer/EMAN1.9. Image processing was done using EMAN2.
CTF補正
詳細: each particle
最終 再構成
アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 15.0 Å / 解像度の算出法: FSC 0.5 CUT-OFF / ソフトウェア - 名称: EMAN2 詳細: Mask parameters were optimized to minimize the influence of a flexible N-terminal domain that impaired projection alignment. 使用した粒子像数: 35000