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Yorodumi- EMDB-14192: Structure of the ribosome-nascent chain containing an ER signal s... -
+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-14192 | |||||||||||||||
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Title | Structure of the ribosome-nascent chain containing an ER signal sequence in complex with NAC | |||||||||||||||
Map data | Ribosome nascent chain containing an ER signal sequence in complex with NAC | |||||||||||||||
Sample |
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Keywords | Ribosome / SRP / NAC / nascent chain / co-translational / Endoplasmic reticulum / co-translational protein targeting / co-translational folding | |||||||||||||||
Function / homology | Function and homology information nascent polypeptide-associated complex / negative regulation of protein localization to endoplasmic reticulum / negative regulation of striated muscle cell apoptotic process / regulation of skeletal muscle fiber development / positive regulation of cell proliferation involved in heart morphogenesis / Major pathway of rRNA processing in the nucleolus and cytosol / GTP hydrolysis and joining of the 60S ribosomal subunit / positive regulation of skeletal muscle tissue growth / cardiac ventricle development / L13a-mediated translational silencing of Ceruloplasmin expression ...nascent polypeptide-associated complex / negative regulation of protein localization to endoplasmic reticulum / negative regulation of striated muscle cell apoptotic process / regulation of skeletal muscle fiber development / positive regulation of cell proliferation involved in heart morphogenesis / Major pathway of rRNA processing in the nucleolus and cytosol / GTP hydrolysis and joining of the 60S ribosomal subunit / positive regulation of skeletal muscle tissue growth / cardiac ventricle development / L13a-mediated translational silencing of Ceruloplasmin expression / SRP-dependent cotranslational protein targeting to membrane / Formation of a pool of free 40S subunits / Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC) / Nonsense Mediated Decay (NMD) enhanced by the Exon Junction Complex (EJC) / heart trabecula morphogenesis / skeletal muscle tissue regeneration / regulation of G1 to G0 transition / exit from mitosis / positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator / regulation of translation involved in cellular response to UV / protein-DNA complex disassembly / positive regulation of DNA damage response, signal transduction by p53 class mediator resulting in transcription of p21 class mediator / optic nerve development / retinal ganglion cell axon guidance / G1 to G0 transition / positive regulation of signal transduction by p53 class mediator / ubiquitin ligase inhibitor activity / cellular response to actinomycin D / negative regulation of ubiquitin-dependent protein catabolic process / rough endoplasmic reticulum / maturation of LSU-rRNA / DNA damage response, signal transduction by p53 class mediator resulting in cell cycle arrest / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / ribosomal large subunit biogenesis / positive regulation of translation / wound healing / cellular response to gamma radiation / transcription coactivator binding / mRNA 5'-UTR binding / rRNA processing / antimicrobial humoral immune response mediated by antimicrobial peptide / protein transport / regulation of translation / retina development in camera-type eye / large ribosomal subunit rRNA binding / 5S rRNA binding / ribosomal large subunit assembly / cytoplasmic translation / defense response to Gram-negative bacterium / cytosolic large ribosomal subunit / in utero embryonic development / killing of cells of another organism / tRNA binding / transcription coactivator activity / postsynaptic density / protein stabilization / rRNA binding / ribosome / structural constituent of ribosome / translation / ribonucleoprotein complex / mRNA binding / ubiquitin protein ligase binding / positive regulation of cell population proliferation / synapse / positive regulation of gene expression / nucleolus / negative regulation of transcription by RNA polymerase II / endoplasmic reticulum / positive regulation of transcription by RNA polymerase II / DNA binding / RNA binding / extracellular exosome / nucleoplasm / nucleus / metal ion binding / cytosol / cytoplasm Similarity search - Function | |||||||||||||||
Biological species | Oryctolagus cuniculus (rabbit) / Homo sapiens (human) | |||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 2.9 Å | |||||||||||||||
Authors | Jomaa A / Gamerdinger M | |||||||||||||||
Funding support | Switzerland, United Kingdom, Germany, United States, 4 items
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Citation | Journal: Science / Year: 2022 Title: Mechanism of signal sequence handover from NAC to SRP on ribosomes during ER-protein targeting. Authors: Ahmad Jomaa / Martin Gamerdinger / Hao-Hsuan Hsieh / Annalena Wallisch / Viswanathan Chandrasekaran / Zeynel Ulusoy / Alain Scaiola / Ramanujan S Hegde / Shu-Ou Shan / Nenad Ban / Elke Deuerling / Abstract: The nascent polypeptide-associated complex (NAC) interacts with newly synthesized proteins at the ribosomal tunnel exit and competes with the signal recognition particle (SRP) to prevent mistargeting ...The nascent polypeptide-associated complex (NAC) interacts with newly synthesized proteins at the ribosomal tunnel exit and competes with the signal recognition particle (SRP) to prevent mistargeting of cytosolic and mitochondrial polypeptides to the endoplasmic reticulum (ER). How NAC antagonizes SRP and how this is overcome by ER targeting signals are unknown. Here, we found that NAC uses two domains with opposing effects to control SRP access. The core globular domain prevented SRP from binding to signal-less ribosomes, whereas a flexibly attached domain transiently captured SRP to permit scanning of nascent chains. The emergence of an ER-targeting signal destabilized NAC's globular domain and facilitated SRP access to the nascent chain. These findings elucidate how NAC hands over the signal sequence to SRP and imparts specificity of protein localization. | |||||||||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_14192.map.gz | 321.1 MB | EMDB map data format | |
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Header (meta data) | emd-14192-v30.xml emd-14192.xml | 72.7 KB 72.7 KB | Display Display | EMDB header |
Images | emd_14192.png | 157.8 KB | ||
Filedesc metadata | emd-14192.cif.gz | 15.5 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-14192 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-14192 | HTTPS FTP |
-Validation report
Summary document | emd_14192_validation.pdf.gz | 801.3 KB | Display | EMDB validaton report |
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Full document | emd_14192_full_validation.pdf.gz | 800.8 KB | Display | |
Data in XML | emd_14192_validation.xml.gz | 7.5 KB | Display | |
Data in CIF | emd_14192_validation.cif.gz | 8.5 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-14192 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-14192 | HTTPS FTP |
-Related structure data
Related structure data | 7qwrMC 7qwqC 7qwsC M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_14192.map.gz / Format: CCP4 / Size: 343 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | Ribosome nascent chain containing an ER signal sequence in complex with NAC | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.08 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Sample components
+Entire : ribosome-nascent chain containing an ER signal sequence in comple...
+Supramolecule #1: ribosome-nascent chain containing an ER signal sequence in comple...
+Supramolecule #2: Ribosome
+Supramolecule #3: Nascent chain pre-prolactin
+Supramolecule #4: Nascent polypeptide-associated complex subunit alpha
+Supramolecule #5: Isoform 2 of Transcription factor BTF3
+Macromolecule #1: Nascent chain pre-prolactin
+Macromolecule #2: Nascent polypeptide-associated complex subunit alpha
+Macromolecule #3: Isoform 2 of Transcription factor BTF3
+Macromolecule #4: 60S ribosomal protein L8
+Macromolecule #5: 60S ribosomal protein L29
+Macromolecule #6: Ribosomal protein L3
+Macromolecule #7: 60S ribosomal protein L30
+Macromolecule #8: 60S ribosomal protein L4
+Macromolecule #9: Ribosomal protein L31
+Macromolecule #10: Ribosomal_L18_c domain-containing protein
+Macromolecule #11: Ribosomal protein L32
+Macromolecule #12: 60S ribosomal protein L6
+Macromolecule #13: 60S ribosomal protein L35a
+Macromolecule #14: uL30
+Macromolecule #15: 60S ribosomal protein L34
+Macromolecule #16: 60S ribosomal protein L7a
+Macromolecule #17: 60S ribosomal protein L35
+Macromolecule #18: 60S ribosomal protein L9
+Macromolecule #19: 60S ribosomal protein L36
+Macromolecule #20: 60S ribosomal protein L10
+Macromolecule #21: Ribosomal protein L37
+Macromolecule #22: Ribosomal protein L11
+Macromolecule #23: 60S ribosomal protein L38
+Macromolecule #24: L13
+Macromolecule #25: Ribosomal protein L39
+Macromolecule #26: 60S ribosomal protein L14
+Macromolecule #27: 60S ribosomal protein L40
+Macromolecule #28: Ribosomal protein L15
+Macromolecule #29: 60s ribosomal protein l41
+Macromolecule #30: 60S ribosomal protein L13a
+Macromolecule #31: eL42
+Macromolecule #32: 60S ribosomal protein L17
+Macromolecule #33: eL43
+Macromolecule #34: eL18
+Macromolecule #35: 60S ribosomal protein L28
+Macromolecule #36: 60S ribosomal protein L19
+Macromolecule #37: 60S ribosomal protein L18a
+Macromolecule #38: 60S ribosomal protein L21
+Macromolecule #39: 60S ribosomal protein L22
+Macromolecule #40: Ribosomal protein L23
+Macromolecule #41: Ribosomal protein L24
+Macromolecule #43: Ribosomal_L23eN domain-containing protein
+Macromolecule #45: Ribosomal protein L26
+Macromolecule #47: 60S ribosomal protein L27
+Macromolecule #48: 60S ribosomal protein L27a
+Macromolecule #42: 28S rRNA
+Macromolecule #44: 5S ribosomal RNA
+Macromolecule #46: 5.8S ribosomal RNA
+Macromolecule #49: ZINC ION
+Macromolecule #50: MAGNESIUM ION
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.5 |
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Grid | Model: Quantifoil R2/2 / Support film - Material: CARBON / Support film - topology: CONTINUOUS / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 15 sec. / Pretreatment - Atmosphere: OTHER |
Vitrification | Cryogen name: ETHANE-PROPANE / Chamber humidity: 95 % / Instrument: FEI VITROBOT MARK IV |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 (6k x 4k) / Average electron dose: 50.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 3.0 µm / Nominal defocus min: 1.0 µm |
Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
Startup model | Type of model: INSILICO MODEL |
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Final reconstruction | Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.1) / Number images used: 44040 |
Initial angle assignment | Type: PROJECTION MATCHING |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |