- EMDB-2372: Negative stain EM structure of the trypsin digested Colicin E9 tr... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-2372
タイトル
Negative stain EM structure of the trypsin digested Colicin E9 translocon complex
マップデータ
Negative stain EM structure of the trypsin digested Colicin E9 translocon complex comprising OmpF trimer and TolB connected by colicin fragment (residues 2-122).
試料
試料: Trypsin digested colicin E9 translocon complex comprising OmpF trimer and TolB connected by Colicin fragment (residues 2-122).
タンパク質・ペプチド: Outer membrane porin 1a (Ia;b;F)
タンパク質・ペプチド: Colicin-E9
タンパク質・ペプチド: Protein TolB
キーワード
Colicins / Porins / Translocon
機能・相同性
機能・相同性情報
cellular response to bacteriocin / regulation of membrane invagination / bacteriocin transport / extrachromosomal circular DNA / protein import / cell division site / protein transport / outer membrane-bounded periplasmic space / endonuclease activity / killing of cells of another organism ...cellular response to bacteriocin / regulation of membrane invagination / bacteriocin transport / extrachromosomal circular DNA / protein import / cell division site / protein transport / outer membrane-bounded periplasmic space / endonuclease activity / killing of cells of another organism / periplasmic space / 加水分解酵素; エステル加水分解酵素 / defense response to bacterium / cell cycle / protein domain specific binding / cell division / protein-containing complex binding / protein-containing complex / membrane / metal ion binding 類似検索 - 分子機能
ジャーナル: Science / 年: 2013 タイトル: Intrinsically disordered protein threads through the bacterial outer-membrane porin OmpF. 著者: Nicholas G Housden / Jonathan T S Hopper / Natalya Lukoyanova / David Rodriguez-Larrea / Justyna A Wojdyla / Alexander Klein / Renata Kaminska / Hagan Bayley / Helen R Saibil / Carol V ...著者: Nicholas G Housden / Jonathan T S Hopper / Natalya Lukoyanova / David Rodriguez-Larrea / Justyna A Wojdyla / Alexander Klein / Renata Kaminska / Hagan Bayley / Helen R Saibil / Carol V Robinson / Colin Kleanthous / 要旨: Porins are β-barrel outer-membrane proteins through which small solutes and metabolites diffuse that are also exploited during cell death. We have studied how the bacteriocin colicin E9 (ColE9) ...Porins are β-barrel outer-membrane proteins through which small solutes and metabolites diffuse that are also exploited during cell death. We have studied how the bacteriocin colicin E9 (ColE9) assembles a cytotoxic translocon at the surface of Escherichia coli that incorporates the trimeric porin OmpF. Formation of the translocon involved ColE9's unstructured N-terminal domain threading in opposite directions through two OmpF subunits, capturing its target TolB on the other side of the membrane in a fixed orientation that triggers colicin import. Thus, an intrinsically disordered protein can tunnel through the narrow pores of an oligomeric porin to deliver an epitope signal to the cell to initiate cell death.
ダウンロード / ファイル: emd_2372.map.gz / 形式: CCP4 / 大きさ: 62.5 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
注釈
Negative stain EM structure of the trypsin digested Colicin E9 translocon complex comprising OmpF trimer and TolB connected by colicin fragment (residues 2-122).
Individual images (n=15,500) of the digested translocon complex were interactively selected from micrographs using the EMAN/Boxer software package. Particle images were normalized and band-pass filtered between 150 A and 8 A. Both angular reconstitution sub-tomogram averages were used as initial models for independent projection matching with SPIDER. Independently of initial model for projection matching, final reconstructions displayed similar features at ~20 A resolution estimated by FSC at 0.5 correlation.
CTF補正
詳細: phases corrected only
最終 再構成
想定した対称性 - 点群: C1 (非対称) / アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 20.0 Å / 解像度の算出法: FSC 0.5 CUT-OFF ソフトウェア - 名称: CTFFIND, Spider, EMAN1/Boxer, Imagic, IMOD, Peet 詳細: Both reconstruction by angular reconstitution and selected sub-tomogram averages were used as initial models for independent projection matching with SPIDER. Independently of initial model ...詳細: Both reconstruction by angular reconstitution and selected sub-tomogram averages were used as initial models for independent projection matching with SPIDER. Independently of initial model for projection matching, final reconstructions displayed similar features at ~20 A resolution estimated by FSC at 0.5 correlation 使用した粒子像数: 7000