登録情報 データベース : EMDB / ID : EMD-0058 構造の表示 ダウンロードとリンクタイトル Cryo-EM map of a partial yeast 48S preinitiation complex in its closed conformation obtained by focused classification using masks for eIF3b-eIF3i. マップデータFor optimal visualization of eIF2, and of eIF3c, eIF3b and eIf3a c-term at the subunit interface, gauss-filter the map by 1.34 and display it at 0.035 詳細 試料複合体 : Structure of a partial yeast 48S preinitiation complex in closed conformation複合体 : tRNA複合体 : Initiation factors複合体 : mRNA複合体 : Initiation factors細胞器官・細胞要素 : RibosomeRNA : x 1種タンパク質・ペプチド : x 34種リガンド : x 4種 詳細 キーワード ribosome / translation / initiation factors / 40S / eIF1A / eIF3 / eIF2 / tRNAi / 48S PIC / small ribosome subunit機能・相同性 機能・相同性情報分子機能 ドメイン・相同性 構成要素
formation of translation initiation ternary complex / Cellular response to mitochondrial stress / Recycling of eIF2:GDP / ABC-family proteins mediated transport / methionyl-initiator methionine tRNA binding / eukaryotic translation initiation factor 3 complex, eIF3e / eukaryotic translation initiation factor 3 complex, eIF3m / translation reinitiation / incipient cellular bud site / eukaryotic translation initiation factor 2 complex ... formation of translation initiation ternary complex / Cellular response to mitochondrial stress / Recycling of eIF2:GDP / ABC-family proteins mediated transport / methionyl-initiator methionine tRNA binding / eukaryotic translation initiation factor 3 complex, eIF3e / eukaryotic translation initiation factor 3 complex, eIF3m / translation reinitiation / incipient cellular bud site / eukaryotic translation initiation factor 2 complex / multi-eIF complex / formation of cytoplasmic translation initiation complex / eukaryotic translation initiation factor 3 complex / protein-synthesizing GTPase / eukaryotic 43S preinitiation complex / cytoplasmic translational initiation / formation of translation preinitiation complex / eukaryotic 48S preinitiation complex / positive regulation of translational fidelity / Formation of the ternary complex, and subsequently, the 43S complex / Translation initiation complex formation / Ribosomal scanning and start codon recognition / Formation of a pool of free 40S subunits / L13a-mediated translational silencing of Ceruloplasmin expression / ribosomal small subunit binding / endonucleolytic cleavage to generate mature 3'-end of SSU-rRNA from (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / 90S preribosome / regulation of translational fidelity / translation regulator activity / endonucleolytic cleavage in ITS1 to separate SSU-rRNA from 5.8S rRNA and LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / translation initiation factor binding / translation initiation factor activity / rescue of stalled ribosome / positive regulation of apoptotic signaling pathway / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA / small-subunit processome / translational initiation / protein kinase C binding / maintenance of translational fidelity / modification-dependent protein catabolic process / cytoplasmic stress granule / rRNA processing / protein tag activity / double-stranded RNA binding / ribosome binding / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / cytosolic large ribosomal subunit / cytoplasmic translation / rRNA binding / ribosome / protein ubiquitination / structural constituent of ribosome / translation / positive regulation of protein phosphorylation / ribonucleoprotein complex / GTPase activity / mRNA binding / ubiquitin protein ligase binding / nucleolus / GTP binding / protein kinase binding / RNA binding / zinc ion binding / identical protein binding / nucleus / metal ion binding / cytoplasm / cytosol 類似検索 - 分子機能 Eukaryotic translation initiation factor SUI1 / Eukaryotic translation initiation factor 3 subunit G / Eukaryotic translation initiation factor 3 subunit G, N-terminal / eIF3G, RNA recognition motif / Eukaryotic translation initiation factor 3 subunit G / Eukaryotic translation initiation factor 3 subunit I / SUI1 domain superfamily / Translation initiation factor SUI1 / Translation initiation factor SUI1 family profile. / Eukaryotic translation initiation factor 3 subunit B ... Eukaryotic translation initiation factor SUI1 / Eukaryotic translation initiation factor 3 subunit G / Eukaryotic translation initiation factor 3 subunit G, N-terminal / eIF3G, RNA recognition motif / Eukaryotic translation initiation factor 3 subunit G / Eukaryotic translation initiation factor 3 subunit I / SUI1 domain superfamily / Translation initiation factor SUI1 / Translation initiation factor SUI1 family profile. / Eukaryotic translation initiation factor 3 subunit B / eIF3B, RNA recognition motif / SUI1 domain / Translation initiation factor, beta propellor-like domain / Eukaryotic translation initiation factor 3 subunit C, N-terminal domain / Eukaryotic translation initiation factor 3 subunit C / Eukaryotic translation initiation factor 3 subunit 8 N-terminus / Eukaryotic translation initiation factor eIF2A / Eukaryotic translation initiation factor 3 subunit A / Translation initiation factor IF2/IF5 / Translation initiation factor IF2/IF5 domain / Translation initiation factor IF2/IF5, N-terminal / Translation initiation factor IF2/IF5, zinc-binding / Domain found in IF2B/IF5 / domain present in translation initiation factor eIF2B and eIF5 / Translation initiation factor 1A (eIF-1A), conserved site / Eukaryotic initiation factor 1A signature. / eukaryotic translation initiation factor 1A / Translation initiation factor 1A (eIF-1A) / IF2a, S1-like domain / Translation initiation factor 2, alpha subunit / Translation initiation factor 2, alpha subunit, middle domain superfamily / Translation initiation factor 2, alpha subunit, C-terminal / Eukaryotic translation initiation factor 2 alpha subunit / Initiation factor eIF2 gamma, domain 2 / Initiation factor eIF2 gamma, GTP-binding domain / Initiation factor eIF2 gamma, C-terminal / : / Initiation factor eIF2 gamma, C terminal / RNA-binding domain, S1, IF1 type / Translation initiation factor 1A / IF-1 / S1 domain IF1 type profile. / motif in proteasome subunits, Int-6, Nip-1 and TRIP-15 / PCI domain / Proteasome component (PCI) domain / PCI domain profile. / Translation elongation factor EF1A/initiation factor IF2gamma, C-terminal / : / S1 domain profile. / Ribosomal protein S26e signature. / : / Ribosomal protein L41 / Ribosomal protein L41 / Ribosomal protein S26e / Ribosomal protein S26e superfamily / Ribosomal protein S26e / Ribosomal protein S21e, conserved site / Ribosomal protein S21e signature. / Ribosomal protein S12e signature. / Ribosomal protein S12e / Ribosomal protein S5, eukaryotic/archaeal / Ribosomal protein S19e, conserved site / Ribosomal protein S19e signature. / Small (40S) ribosomal subunit Asc1/RACK1 / Ribosomal protein S21e / Ribosomal protein S2, eukaryotic / Ribosomal protein S21e superfamily / Ribosomal protein S21e / S27a-like superfamily / 40S Ribosomal protein S10 / Ribosomal protein S10, eukaryotic/archaeal / Plectin/S10, N-terminal / Plectin/S10 domain / Ribosomal protein S25 / S25 ribosomal protein / Ribosomal protein S27a / Ribosomal protein S2, eukaryotic/archaeal / : / Ribosomal protein S27a / Ribosomal protein S27a / Ribosomal protein S17e, conserved site / Ribosomal protein S17e signature. / Ribosomal protein S8e subdomain, eukaryotes / Ribosomal protein S30 / Ribosomal protein S30 / 40S ribosomal protein S29/30S ribosomal protein S14 type Z / Ribosomal protein S7e signature. / Ribosomal protein S3, eukaryotic/archaeal / : / Ribosomal protein S19e / Ribosomal protein S3Ae, conserved site / Ribosomal protein S19e / Ribosomal protein S3Ae signature. / Ribosomal_S19e / Ribosomal protein S27e signature. / Ribosomal protein S4e, N-terminal, conserved site / Ribosomal protein S4e signature. / 40S ribosomal protein S4, C-terminal domain / 40S ribosomal protein S4 C-terminus / Ribosomal protein S19A/S15e / Ribosomal protein S8e, conserved site 類似検索 - ドメイン・相同性 Eukaryotic translation initiation factor 3 subunit I / Eukaryotic translation initiation factor 3 subunit G / Eukaryotic translation initiation factor 3 subunit B / Eukaryotic translation initiation factor 2 subunit beta / Small ribosomal subunit protein eS32A / Eukaryotic translation initiation factor 2 subunit alpha / Small ribosomal subunit protein uS11 / Eukaryotic translation initiation factor 2 subunit gamma / Eukaryotic translation initiation factor 3 subunit C / Eukaryotic translation initiation factor eIF-1 ... Eukaryotic translation initiation factor 3 subunit I / Eukaryotic translation initiation factor 3 subunit G / Eukaryotic translation initiation factor 3 subunit B / Eukaryotic translation initiation factor 2 subunit beta / Small ribosomal subunit protein eS32A / Eukaryotic translation initiation factor 2 subunit alpha / Small ribosomal subunit protein uS11 / Eukaryotic translation initiation factor 2 subunit gamma / Eukaryotic translation initiation factor 3 subunit C / Eukaryotic translation initiation factor eIF-1 / Small ribosomal subunit protein eS28 / Eukaryotic translation initiation factor 3 subunit A / Eukaryotic translation initiation factor 1A / Eukaryotic translation initiation factor 3 subunit I / Ubiquitin-ribosomal protein eS31 fusion protein / KLLA0F25542p / KLLA0F18040p / KLLA0F09812p / KLLA0F07843p / 40S ribosomal protein S12 / Small ribosomal subunit protein eS6 / KLLA0E23673p / 40S ribosomal protein S8 / Small ribosomal subunit protein uS2 / KLLA0E12277p / 40S ribosomal protein S27 / Small ribosomal subunit protein uS14 / KLLA0D10659p / 40S ribosomal protein S3 / 40S ribosomal protein S26 / 40S ribosomal protein S7 / 40S ribosomal protein S24 / 40S ribosomal protein S30 / KLLA0B08173p / Small ribosomal subunit protein uS8 / 40S ribosomal protein S25 / Small ribosomal subunit protein eS1 / 40S ribosomal protein S4 / KLLA0B01562p / KLLA0B01474p / KLLA0A10483p / KLLA0A07194p / Small ribosomal subunit protein eS21 / RPS23 / Small ribosomal subunit protein uS9 類似検索 - 構成要素生物種 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (パン酵母) / Kluyveromyces lactis (strain ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37) (酵母)手法 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度 : 5.75 Å 詳細 データ登録者Llacer JL / Hussain T 資金援助 英国, 2件 詳細 詳細を隠すOrganization Grant number 国 Medical Research Council (United Kingdom) MC_U105184332 英国 Wellcome Trust WT096570 英国
引用ジャーナル : Mol Cell / 年 : 2015タイトル : Conformational Differences between Open and Closed States of the Eukaryotic Translation Initiation Complex.著者 : Jose L Llácer / Tanweer Hussain / Laura Marler / Colin Echeverría Aitken / Anil Thakur / Jon R Lorsch / Alan G Hinnebusch / V Ramakrishnan / 要旨 : Translation initiation in eukaryotes begins with the formation of a pre-initiation complex (PIC) containing the 40S ribosomal subunit, eIF1, eIF1A, eIF3, ternary complex (eIF2-GTP-Met-tRNAi), and ... Translation initiation in eukaryotes begins with the formation of a pre-initiation complex (PIC) containing the 40S ribosomal subunit, eIF1, eIF1A, eIF3, ternary complex (eIF2-GTP-Met-tRNAi), and eIF5. The PIC, in an open conformation, attaches to the 5' end of the mRNA and scans to locate the start codon, whereupon it closes to arrest scanning. We present single particle cryo-electron microscopy (cryo-EM) reconstructions of 48S PICs from yeast in these open and closed states, at 6.0 Å and 4.9 Å, respectively. These reconstructions show eIF2β as well as a configuration of eIF3 that appears to encircle the 40S, occupying part of the subunit interface. Comparison of the complexes reveals a large conformational change in the 40S head from an open mRNA latch conformation to a closed one that constricts the mRNA entry channel and narrows the P site to enclose tRNAi, thus elucidating key events in start codon recognition. 履歴 ヘッダ(付随情報) 公開 2016年8月24日 - 登録 2018年6月14日 - マップ公開 2019年6月26日 - 更新 2024年7月10日 - 現状 2024年7月10日 処理サイト : PDBe / 状態 : 公開
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