- EMDB-2511: Cryo-EM of the Sec61-complex bound to an 80S-RNC engaged with a t... -
+
データを開く
IDまたはキーワード:
読み込み中...
-
基本情報
登録情報
データベース: EMDB / ID: EMD-2511
タイトル
Cryo-EM of the Sec61-complex bound to an 80S-RNC engaged with a translocating LepT chain
マップデータ
Reconstruction of 80S-RNC-Sec61 complex engaged with translocating nascent chain (LepT)
試料
試料: Canis familiaris Sec61 bound to a wheat germ 80S-RNC translating the translocating LepT-polypeptide
複合体: 80S Ribosome
タンパク質・ペプチド: Sec61-complex
キーワード
Co-translational protein translocation
機能・相同性
機能・相同性情報
Insertion of tail-anchored proteins into the endoplasmic reticulum membrane / membrane docking / endoplasmic reticulum Sec complex / pronephric nephron development / cotranslational protein targeting to membrane / Ssh1 translocon complex / Sec61 translocon complex / protein targeting to ER / protein insertion into ER membrane / protein-transporting ATPase activity ...Insertion of tail-anchored proteins into the endoplasmic reticulum membrane / membrane docking / endoplasmic reticulum Sec complex / pronephric nephron development / cotranslational protein targeting to membrane / Ssh1 translocon complex / Sec61 translocon complex / protein targeting to ER / protein insertion into ER membrane / protein-transporting ATPase activity / SRP-dependent cotranslational protein targeting to membrane, translocation / signal sequence binding / post-translational protein targeting to membrane, translocation / protein transmembrane transporter activity / guanyl-nucleotide exchange factor activity / phospholipid binding / ribosome binding / endoplasmic reticulum membrane / endoplasmic reticulum / membrane 類似検索 - 分子機能
Protein transport Sec61-beta/Sbh / Protein transport protein SecG/Sec61-beta/Sbh / Sec61beta family / Protein translocase SEC61 complex, gamma subunit / Protein translocase SecE domain superfamily / Translocon Sec61/SecY, plug domain / Plug domain of Sec61p / Protein secE/sec61-gamma signature. / Protein secY signature 1. / Protein secY signature 2. ...Protein transport Sec61-beta/Sbh / Protein transport protein SecG/Sec61-beta/Sbh / Sec61beta family / Protein translocase SEC61 complex, gamma subunit / Protein translocase SecE domain superfamily / Translocon Sec61/SecY, plug domain / Plug domain of Sec61p / Protein secE/sec61-gamma signature. / Protein secY signature 1. / Protein secY signature 2. / SecE/Sec61-gamma subunits of protein translocation complex / Protein translocase complex, SecE/Sec61-gamma subunit / SecY/SEC61-alpha family / SecY domain superfamily / SecY conserved site / SecY 類似検索 - ドメイン・相同性
Protein transport protein Sec61 subunit alpha isoform 1 / Protein transport protein Sec61 subunit gamma / Protein transport protein Sec61 subunit beta 類似検索 - 構成要素
ジャーナル: Nature / 年: 2014 タイトル: Structures of the Sec61 complex engaged in nascent peptide translocation or membrane insertion. 著者: Marko Gogala / Thomas Becker / Birgitta Beatrix / Jean-Paul Armache / Clara Barrio-Garcia / Otto Berninghausen / Roland Beckmann / 要旨: The biogenesis of secretory as well as transmembrane proteins requires the activity of the universally conserved protein-conducting channel (PCC), the Sec61 complex (SecY complex in bacteria). In ...The biogenesis of secretory as well as transmembrane proteins requires the activity of the universally conserved protein-conducting channel (PCC), the Sec61 complex (SecY complex in bacteria). In eukaryotic cells the PCC is located in the membrane of the endoplasmic reticulum where it can bind to translating ribosomes for co-translational protein transport. The Sec complex consists of three subunits (Sec61α, β and γ) and provides an aqueous environment for the translocation of hydrophilic peptides as well as a lateral opening in the Sec61α subunit that has been proposed to act as a gate for the membrane partitioning of hydrophobic domains. A plug helix and a so-called pore ring are believed to seal the PCC against ion flow and are proposed to rearrange for accommodation of translocating peptides. Several crystal and cryo-electron microscopy structures revealed different conformations of closed and partially open Sec61 and SecY complexes. However, in none of these samples has the translocation state been unambiguously defined biochemically. Here we present cryo-electron microscopy structures of ribosome-bound Sec61 complexes engaged in translocation or membrane insertion of nascent peptides. Our data show that a hydrophilic peptide can translocate through the Sec complex with an essentially closed lateral gate and an only slightly rearranged central channel. Membrane insertion of a hydrophobic domain seems to occur with the Sec complex opening the proposed lateral gate while rearranging the plug to maintain an ion permeability barrier. Taken together, we provide a structural model for the basic activities of the Sec61 complex as a protein-conducting channel.
全体 : Canis familiaris Sec61 bound to a wheat germ 80S-RNC translating ...
全体
名称: Canis familiaris Sec61 bound to a wheat germ 80S-RNC translating the translocating LepT-polypeptide
要素
試料: Canis familiaris Sec61 bound to a wheat germ 80S-RNC translating the translocating LepT-polypeptide
複合体: 80S Ribosome
タンパク質・ペプチド: Sec61-complex
-
超分子 #1000: Canis familiaris Sec61 bound to a wheat germ 80S-RNC translating ...
超分子
名称: Canis familiaris Sec61 bound to a wheat germ 80S-RNC translating the translocating LepT-polypeptide タイプ: sample / ID: 1000 / 集合状態: One Sec61 binds to one 80S ribosome / Number unique components: 2
-
超分子 #1: 80S Ribosome
超分子
名称: 80S Ribosome / タイプ: complex / ID: 1 / 組換発現: No / Ribosome-details: ribosome-eukaryote: ALL
由来(天然)
生物種: Triticum aestivum (コムギ) / 別称: wheat germ
-
分子 #1: Sec61-complex
分子
名称: Sec61-complex / タイプ: protein_or_peptide / ID: 1 / Name.synonym: Dog pancreas Sec61-complex / 詳細: Data-subset resulted from computational sorting / コピー数: 1 / 集合状態: Monomer / 組換発現: No