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- PDB-3j2i: Structure of late pre-60S ribosomal subunits with nuclear export ... -
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Basic information
Entry | Database: PDB / ID: 3j2i | ||||||
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Title | Structure of late pre-60S ribosomal subunits with nuclear export factor Arx1 bound at the peptide exit tunnel | ||||||
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![]() | RIBOSOMAL PROTEIN / SIGNALING PROTEIN / ribosome / pre-ribosome / cryo-EM | ||||||
Function / homology | ![]() maturation of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of 5.8S rRNA / ribosomal large subunit binding / preribosome, large subunit precursor / ribosomal subunit export from nucleus / translation initiation factor activity / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / assembly of large subunit precursor of preribosome / maturation of LSU-rRNA / cytosolic ribosome assembly ...maturation of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of 5.8S rRNA / ribosomal large subunit binding / preribosome, large subunit precursor / ribosomal subunit export from nucleus / translation initiation factor activity / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / assembly of large subunit precursor of preribosome / maturation of LSU-rRNA / cytosolic ribosome assembly / ribosomal large subunit biogenesis / positive regulation of cell differentiation / rRNA processing / transcription corepressor activity / azurophil granule lumen / regulation of translation / nucleic acid binding / ribonucleoprotein complex / negative regulation of DNA-templated transcription / ubiquitin protein ligase binding / Neutrophil degranulation / nucleolus / negative regulation of apoptotic process / RNA binding / extracellular exosome / extracellular region / membrane / nucleus / cytoplasm / cytosol Similarity search - Function | ||||||
Biological species | ![]() ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 11.9 Å | ||||||
![]() | Bradatsch, B. / Leidig, C. / Granneman, S. / Gnaedig, M. / Tollervey, D. / Boettcher, B. / Beckmann, R. / Hurt, E. | ||||||
![]() | ![]() Title: Structure of the pre-60S ribosomal subunit with nuclear export factor Arx1 bound at the exit tunnel. Authors: Bettina Bradatsch / Christoph Leidig / Sander Granneman / Marén Gnädig / David Tollervey / Bettina Böttcher / Roland Beckmann / Ed Hurt / ![]() Abstract: Preribosomal particles evolve in the nucleus through transient interaction with biogenesis factors before export to the cytoplasm. Here, we report the architecture of the late pre-60S particle, ...Preribosomal particles evolve in the nucleus through transient interaction with biogenesis factors before export to the cytoplasm. Here, we report the architecture of the late pre-60S particle, purified from Saccharomyces cerevisiae, through Arx1, a nuclear export factor with structural homology to methionine aminopeptidases, or its binding partner Alb1. Cryo-EM reconstruction of the Arx1 particle at 11.9-Å resolution reveals regions of extra density on the pre-60S particle attributed to associated biogenesis factors, confirming the immature state of the nascent subunit. One of these densities could be unambiguously assigned to Arx1. Immunoelectron microscopy and UV cross-linking localize Arx1 close to the ribosomal exit tunnel, in direct contact with ES27, a highly dynamic eukaryotic rRNA expansion segment. The binding of Arx1 at the exit tunnel may position this export factor to prevent premature recruitment of ribosome-associated factors active during translation. | ||||||
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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PDBx/mmCIF format | ![]() | 121.2 KB | Display | ![]() |
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PDB format | ![]() | 93.7 KB | Display | ![]() |
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-Validation report
Summary document | ![]() | 740.2 KB | Display | ![]() |
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Full document | ![]() | 748 KB | Display | |
Data in XML | ![]() | 24.4 KB | Display | |
Data in CIF | ![]() | 34.8 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 5513MC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
#1: Protein | Mass: 26476.605 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#2: Protein | Mass: 43851.879 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: pre-60S particle / Type: RIBOSOME / Synonym: pre-60S |
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Molecular weight | Value: 1.3 MDa / Experimental value: NO |
Buffer solution | pH: 7 Details: 50 mM Tris-HCl, pH 7.5, 100 mM NaCl, 1.5 mM or 5 mM MgCl2, 0.075% (v/v) NP-40 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 95 % Details: Blot for 2 seconds before plunging in liquid ethane (FEI VITROBOT MARK IV) |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS / Date: Apr 6, 2012 |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD |
Specimen holder | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Electron dose: 20 e/Å2 / Film or detector model: GENERIC CCD |
Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Relative weight: 1 |
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Processing
EM software |
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CTF correction | Details: subvolumes | ||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||
3D reconstruction | Method: Projection Matching / Resolution: 11.9 Å / Num. of particles: 100000 / Nominal pixel size: 1.2375 Å / Actual pixel size: 1.2375 Å / Symmetry type: POINT | ||||||||||||
Refinement step | Cycle: LAST
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