+Open data
-Basic information
Entry | Database: PDB / ID: 2j28 | ||||||
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Title | MODEL OF E. COLI SRP BOUND TO 70S RNCS | ||||||
Components |
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Keywords | RIBOSOME / PROTEIN-RNA COMPLEX / SIGNAL RECOGNITION PARTICLE | ||||||
Function / homology | Function and homology information absorption of visible light / G protein-coupled photoreceptor activity / signal recognition particle / photoreceptor inner segment membrane / rhodopsin mediated signaling pathway / 11-cis retinal binding / signal-recognition-particle GTPase / 7S RNA binding / SRP-dependent cotranslational protein targeting to membrane / protein targeting to membrane ...absorption of visible light / G protein-coupled photoreceptor activity / signal recognition particle / photoreceptor inner segment membrane / rhodopsin mediated signaling pathway / 11-cis retinal binding / signal-recognition-particle GTPase / 7S RNA binding / SRP-dependent cotranslational protein targeting to membrane / protein targeting to membrane / negative regulation of cytoplasmic translational initiation / photoreceptor outer segment membrane / stringent response / transcriptional attenuation / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / positive regulation of ribosome biogenesis / negative regulation of cytoplasmic translation / translational termination / DnaA-L2 complex / : / translation repressor activity / translational initiation / negative regulation of DNA-templated DNA replication initiation / ribosome assembly / visual perception / mRNA regulatory element binding translation repressor activity / response to reactive oxygen species / assembly of large subunit precursor of preribosome / cytosolic ribosome assembly / regulation of cell growth / DNA-templated transcription termination / response to radiation / mRNA 5'-UTR binding / photoreceptor disc membrane / ribosomal large subunit assembly / large ribosomal subunit rRNA binding / ribosome binding / large ribosomal subunit / cytoplasmic translation / 5S rRNA binding / cytosolic large ribosomal subunit / transferase activity / tRNA binding / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / ribonucleoprotein complex / translation / response to antibiotic / mRNA binding / GTPase activity / negative regulation of DNA-templated transcription / GTP binding / ATP hydrolysis activity / DNA binding / RNA binding / zinc ion binding / membrane / metal ion binding / plasma membrane / cytosol / cytoplasm Similarity search - Function | ||||||
Biological species | ESCHERICHIA COLI (E. coli) | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 9.5 Å | ||||||
Authors | Halic, M. / Blau, M. / Becker, T. / Mielke, T. / Pool, M.R. / Wild, K. / Sinning, I. / Beckmann, R. | ||||||
Citation | Journal: Nature / Year: 2006 Title: Following the signal sequence from ribosomal tunnel exit to signal recognition particle. Authors: Mario Halic / Michael Blau / Thomas Becker / Thorsten Mielke / Martin R Pool / Klemens Wild / Irmgard Sinning / Roland Beckmann / Abstract: Membrane and secretory proteins can be co-translationally inserted into or translocated across the membrane. This process is dependent on signal sequence recognition on the ribosome by the signal ...Membrane and secretory proteins can be co-translationally inserted into or translocated across the membrane. This process is dependent on signal sequence recognition on the ribosome by the signal recognition particle (SRP), which results in targeting of the ribosome-nascent-chain complex to the protein-conducting channel at the membrane. Here we present an ensemble of structures at subnanometre resolution, revealing the signal sequence both at the ribosomal tunnel exit and in the bacterial and eukaryotic ribosome-SRP complexes. Molecular details of signal sequence interaction in both prokaryotic and eukaryotic complexes were obtained by fitting high-resolution molecular models. The signal sequence is presented at the ribosomal tunnel exit in an exposed position ready for accommodation in the hydrophobic groove of the rearranged SRP54 M domain. Upon ribosome binding, the SRP54 NG domain also undergoes a conformational rearrangement, priming it for the subsequent docking reaction with the NG domain of the SRP receptor. These findings provide the structural basis for improving our understanding of the early steps of co-translational protein sorting. | ||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | Molecule: MolmilJmol/JSmol |
-Downloads & links
-Download
PDBx/mmCIF format | 2j28.cif.gz | 2.2 MB | Display | PDBx/mmCIF format |
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PDB format | pdb2j28.ent.gz | 1.7 MB | Display | PDB format |
PDBx/mmJSON format | 2j28.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/j2/2j28 ftp://data.pdbj.org/pub/pdb/validation_reports/j2/2j28 | HTTPS FTP |
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-Related structure data
Related structure data | 1261MC 1262MC 1263MC 1264C 2j37C M: map data used to model this data C: citing same article (ref.) |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
+50S RIBOSOMAL PROTEIN ... , 29 types, 29 molecules 01234CDEFGHIJKLMNOPQRSTUVWXYZ
-RNA chain , 3 types, 3 molecules 8AB
#7: RNA chain | Mass: 23968.311 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ESCHERICHIA COLI (E. coli) / Strain: MRE600 / Production host: ESCHERICHIA COLI (E. coli) |
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#9: RNA chain | Mass: 37848.555 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ESCHERICHIA COLI (E. coli) / Strain: MRE600 / Production host: ESCHERICHIA COLI (E. coli) |
#10: RNA chain | Mass: 941612.375 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ESCHERICHIA COLI (E. coli) / Strain: MRE600 / Production host: ESCHERICHIA COLI (E. coli) |
-Protein/peptide / Protein , 2 types, 2 molecules 79
#6: Protein/peptide | Mass: 2121.542 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ESCHERICHIA COLI (E. coli) / Strain: MRE600 / Production host: ESCHERICHIA COLI (E. coli) / References: UniProt: O62798*PLUS |
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#8: Protein | Mass: 47362.168 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ESCHERICHIA COLI (E. coli) / Strain: MRE600 / Production host: ESCHERICHIA COLI (E. coli) / References: UniProt: P0AGD7 |
-Non-polymers , 2 types, 623 molecules
#35: Chemical | ChemComp-MG / #36: Water | ChemComp-HOH / | |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-Sample preparation
Component | Name: SRP BOUND TO 70S RNCS / Type: RIBOSOME |
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Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Details: CARBON |
Vitrification | Cryogen name: ETHANE |
-Electron microscopy imaging
Experimental equipment | Model: Tecnai F30 / Image courtesy: FEI Company |
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Microscopy | Model: FEI TECNAI F30 |
Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
Electron lens | Mode: BRIGHT FIELDBright-field microscopy |
Image recording | Film or detector model: KODAK SO-163 FILM |
Radiation wavelength | Relative weight: 1 |
-Processing
EM software | Name: SPIDER / Category: 3D reconstruction | ||||||||||||
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Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||
3D reconstruction | Resolution: 9.5 Å / Resolution method: FSC 0.5 CUT-OFF / Symmetry type: POINT | ||||||||||||
Refinement | Highest resolution: 8 Å | ||||||||||||
Refinement step | Cycle: LAST / Highest resolution: 8 Å
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