- EMDB-2844: Structural basis for targeting and elongation arrest of Bacillus ... -
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基本情報
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データベース: EMDB / ID: EMD-2844
タイトル
Structural basis for targeting and elongation arrest of Bacillus signal recognition particle
マップデータ
mammalian signal recognition particle bound to ribosome nascent chain complex.
試料
試料: mammalian signal recognition particle bound to ribosome nascent chain complex
複合体: SRP-bound 80S ribosome
タンパク質・ペプチド: signal recognition particle
キーワード
Signal recognition particle (SRP) / Stalled Ribosome
機能・相同性
機能・相同性情報
SRP-dependent cotranslational protein targeting to membrane / SRP-dependent cotranslational protein targeting to membrane, signal sequence recognition / signal recognition particle, endoplasmic reticulum targeting / granulocyte differentiation / absorption of visible light / signal recognition particle binding / photoreceptor inner segment membrane / G protein-coupled opsin signaling pathway / 11-cis retinal binding / G protein-coupled photoreceptor activity ...SRP-dependent cotranslational protein targeting to membrane / SRP-dependent cotranslational protein targeting to membrane, signal sequence recognition / signal recognition particle, endoplasmic reticulum targeting / granulocyte differentiation / absorption of visible light / signal recognition particle binding / photoreceptor inner segment membrane / G protein-coupled opsin signaling pathway / 11-cis retinal binding / G protein-coupled photoreceptor activity / endoplasmic reticulum signal peptide binding / cellular response to light stimulus / negative regulation of translational elongation / signal-recognition-particle GTPase / protein targeting to ER / SRP-dependent cotranslational protein targeting to membrane / 7S RNA binding / : / exocrine pancreas development / SRP-dependent cotranslational protein targeting to membrane, translocation / photoreceptor outer segment membrane / plasma membrane => GO:0005886 / phototransduction / photoreceptor outer segment / visual perception / neutrophil chemotaxis / photoreceptor disc membrane / GDP binding / membrane => GO:0016020 / nuclear speck / G protein-coupled receptor signaling pathway / GTPase activity / nucleolus / GTP binding / endoplasmic reticulum / ATP hydrolysis activity / nucleoplasm / nucleus / metal ion binding / plasma membrane / cytosol 類似検索 - 分子機能
Signal recognition particle, SRP9 subunit / SRP9 domain / Signal recognition particle SRP9 / Signal recognition particle 9 kDa protein (SRP9) / Signal recognition particle, SRP14 subunit / Signal recognition particle, SRP9/SRP14 subunit / Signal recognition particle 14kD protein / Signal recognition particle subunit SRP68 / Signal recognition particle subunit SRP68, RNA-binding domain / SRP68, N-terminal domain superfamily ...Signal recognition particle, SRP9 subunit / SRP9 domain / Signal recognition particle SRP9 / Signal recognition particle 9 kDa protein (SRP9) / Signal recognition particle, SRP14 subunit / Signal recognition particle, SRP9/SRP14 subunit / Signal recognition particle 14kD protein / Signal recognition particle subunit SRP68 / Signal recognition particle subunit SRP68, RNA-binding domain / SRP68, N-terminal domain superfamily / RNA-binding signal recognition particle 68 / Signal recognition particle, SRP54 subunit, eukaryotic / Signal recognition particle, SRP19 subunit / Signal recognition particle, subunit SRP19-like superfamily / SRP19 protein / Rhodopsin, N-terminal / Amino terminal of the G-protein receptor rhodopsin / Rhodopsin / Opsin / Visual pigments (opsins) retinal binding site / Visual pigments (opsins) retinal binding site. / SRP/SRP receptor, N-terminal / Signal recognition particle, SRP54 subunit / Signal recognition particle, SRP54 subunit, M-domain / Signal recognition particle, SRP54 subunit, M-domain superfamily / Signal peptide binding domain / SRP54-type proteins GTP-binding domain signature. / Signal recognition particle SRP54, helical bundle / Signal recognition particle SRP54, N-terminal domain superfamily / SRP54-type protein, helical bundle domain / SRP54-type protein, helical bundle domain / Signal recognition particle, SRP54 subunit, GTPase domain / SRP54-type protein, GTPase domain / SRP54-type protein, GTPase domain / G-protein coupled receptors family 1 signature. / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile. / 7 transmembrane receptor (rhodopsin family) / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase 類似検索 - ドメイン・相同性
Signal recognition particle 19 kDa protein / Signal recognition particle 14 kDa protein / Signal recognition particle 9 kDa protein / Rhodopsin / Signal recognition particle subunit SRP54 / Signal recognition particle subunit SRP68 類似検索 - 構成要素
ジャーナル: Nat Struct Mol Biol / 年: 2015 タイトル: Translational arrest by a prokaryotic signal recognition particle is mediated by RNA interactions. 著者: Bertrand Beckert / Alexej Kedrov / Daniel Sohmen / Georg Kempf / Klemens Wild / Irmgard Sinning / Henning Stahlberg / Daniel N Wilson / Roland Beckmann / 要旨: The signal recognition particle (SRP) recognizes signal sequences of nascent polypeptides and targets ribosome-nascent chain complexes to membrane translocation sites. In eukaryotes, translating ...The signal recognition particle (SRP) recognizes signal sequences of nascent polypeptides and targets ribosome-nascent chain complexes to membrane translocation sites. In eukaryotes, translating ribosomes are slowed down by the Alu domain of SRP to allow efficient targeting. In prokaryotes, however, little is known about the structure and function of Alu domain-containing SRPs. Here, we report a complete molecular model of SRP from the Gram-positive bacterium Bacillus subtilis, based on cryo-EM. The SRP comprises two subunits, 6S RNA and SRP54 or Ffh, and it facilitates elongation slowdown similarly to its eukaryotic counterpart. However, protein contacts with the small ribosomal subunit observed for the mammalian Alu domain are substituted in bacteria by RNA-RNA interactions of 6S RNA with the α-sarcin-ricin loop and helices H43 and H44 of 23S rRNA. Our findings provide a structural basis for cotranslational targeting and RNA-driven elongation arrest in prokaryotes.
Automated particle selection was performed using the program Signature.Three dimensional reconstructions were then performed using the SPIDER software package.
CTF補正
詳細: micrograph
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: 9.0 Å / 解像度の算出法: OTHER / ソフトウェア - 名称: Spider / 使用した粒子像数: 19096