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Entry
Database: EMDB / ID: EMD-1723
TitleRibosome dynamics and tRNA movement as visualized by time-resolved electron cryomicroscopy
Map dataSubstate of E. coli 70S-fMetVal-tRNAVal-tRNAfMet complex in intermediate post-translocation state (post3)
Sample
  • Sample: Substate of E. coli 70S-fMetVal-tRNAVal-tRNAfMet complex in intermediate post-translocation state (post3)
  • Complex: Ribosome
  • RNA: fMetVal-tRNAVal
  • RNA: tRNAfMet
  • RNA: m022 mRNA
KeywordsRibosome / translation / translocation / tRNA
Function / homology
Function and homology information


stringent response / ornithine decarboxylase inhibitor activity / transcription antitermination factor activity, RNA binding / misfolded RNA binding / Group I intron splicing / RNA folding / transcriptional attenuation / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / positive regulation of ribosome biogenesis ...stringent response / ornithine decarboxylase inhibitor activity / transcription antitermination factor activity, RNA binding / misfolded RNA binding / Group I intron splicing / RNA folding / 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 / four-way junction DNA binding / translation repressor activity / negative regulation of translational initiation / negative regulation of DNA-templated DNA replication initiation / regulation of mRNA stability / mRNA regulatory element binding translation repressor activity / ribosome assembly / assembly of large subunit precursor of preribosome / positive regulation of RNA splicing / cytosolic ribosome assembly / transcription elongation factor complex / regulation of DNA-templated transcription elongation / DNA endonuclease activity / response to reactive oxygen species / transcription antitermination / regulation of cell growth / DNA-templated transcription termination / maintenance of translational fidelity / response to radiation / mRNA 5'-UTR binding / ribosomal small subunit biogenesis / small ribosomal subunit rRNA binding / large ribosomal subunit / ribosome biogenesis / ribosome binding / regulation of translation / ribosomal small subunit assembly / large ribosomal subunit rRNA binding / 5S rRNA binding / transferase activity / small ribosomal subunit / cytosolic small ribosomal subunit / ribosomal large subunit assembly / cytoplasmic translation / cytosolic large ribosomal subunit / tRNA binding / molecular adaptor activity / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / translation / response to antibiotic / negative regulation of DNA-templated transcription / mRNA binding / DNA binding / RNA binding / zinc ion binding / membrane / cytosol / cytoplasm
Similarity search - Function
Ribosomal protein L1, bacterial-type / Ribosomal protein L1, conserved site / Ribosomal protein L1 signature. / Ribosomal protein L1 / Ribosomal protein L1, 3-layer alpha/beta-sandwich / Ribosomal protein S21, conserved site / Ribosomal protein S21 signature. / Ribosomal protein L25, short-form / Ribosomal protein L1-like / Ribosomal protein L1/ribosomal biogenesis protein ...Ribosomal protein L1, bacterial-type / Ribosomal protein L1, conserved site / Ribosomal protein L1 signature. / Ribosomal protein L1 / Ribosomal protein L1, 3-layer alpha/beta-sandwich / Ribosomal protein S21, conserved site / Ribosomal protein S21 signature. / Ribosomal protein L25, short-form / Ribosomal protein L1-like / Ribosomal protein L1/ribosomal biogenesis protein / Ribosomal protein L1p/L10e family / Ribosomal protein S14, bacterial/plastid / Ribosomal protein L11, bacterial-type / Ribosomal protein S21 superfamily / Ribosomal protein S21 / Ribosomal protein S16, conserved site / Ribosomal protein S16 signature. / Ribosomal protein S21 / Ribosomal protein L11, conserved site / Ribosomal protein L11 signature. / : / Ribosomal protein L21, conserved site / Ribosomal protein L21 signature. / Ribosomal protein L16 signature 1. / : / Ribosomal protein L6, conserved site / Ribosomal protein L6 signature 1. / Ribosomal protein L16, conserved site / Ribosomal protein L16 signature 2. / Ribosomal protein L9 signature. / Ribosomal protein L9, bacteria/chloroplast / Ribosomal protein L9, C-terminal / Ribosomal protein L9, C-terminal domain / Ribosomal protein L9, C-terminal domain superfamily / Ribosomal protein L17 signature. / Ribosomal protein L11, N-terminal / Ribosomal protein L11, N-terminal domain / Ribosomal L25p family / Ribosomal protein L25 / Ribosomal protein L11/L12 / Ribosomal protein L11, C-terminal / Ribosomal protein L11, C-terminal domain superfamily / Ribosomal protein L11/L12, N-terminal domain superfamily / Ribosomal protein L11/L12 / Ribosomal protein L11, RNA binding domain / Ribosomal protein L28/L24 superfamily / Ribosomal protein L36 signature. / Ribosomal protein L25/Gln-tRNA synthetase, N-terminal / Ribosomal protein L25/Gln-tRNA synthetase, anti-codon-binding domain superfamily / Ribosomal protein L32p, bacterial type / Ribosomal protein L9, N-terminal domain superfamily / Ribosomal protein L9 / Ribosomal protein L9, N-terminal / Ribosomal protein L9, N-terminal domain / : / : / Ribosomal protein L28 / Ribosomal protein L35, conserved site / Ribosomal protein L35 signature. / Ribosomal protein L33, conserved site / Ribosomal protein L33 signature. / Ribosomal protein L35, non-mitochondrial / Ribosomal protein L5, bacterial-type / Ribosomal protein L18, bacterial-type / Ribosomal protein L6, bacterial-type / Ribosomal protein L9/RNase H1, N-terminal / Ribosomal protein L19, conserved site / Ribosomal protein L19 signature. / Ribosomal protein L36 / Ribosomal protein L36 superfamily / Ribosomal protein L36 / Ribosomal protein S3, bacterial-type / Ribosomal protein S6, conserved site / Ribosomal protein L20 signature. / Ribosomal protein S6 signature. / Ribosomal protein S19, bacterial-type / Ribosomal protein S13, bacterial-type / Ribosomal protein L27, conserved site / Ribosomal protein L27 signature. / Ribosomal protein S7, bacterial/organellar-type / Ribosomal protein S11, bacterial-type / Ribosomal protein S20 / Ribosomal protein S20 superfamily / Ribosomal protein S20 / Ribosomal protein S9, bacterial/plastid / Ribosomal protein S4, bacterial-type / 30S ribosomal protein S17 / Ribosomal protein S5, bacterial-type / Ribosomal protein L14P, bacterial-type / Ribosomal protein L34, conserved site / Ribosomal protein L34 signature. / Ribosomal protein L22, bacterial/chloroplast-type / Ribosomal protein S6, plastid/chloroplast / Ribosomal protein L2, bacterial/organellar-type / Ribosomal protein L35 / Ribosomal protein L35 superfamily / Ribosomal protein S2, bacteria/mitochondria/plastid / Ribosomal protein L35 / Ribosomal L28 family / Ribosomal protein L33
Similarity search - Domain/homology
Small ribosomal subunit protein bS6 / Small ribosomal subunit protein uS7 / Large ribosomal subunit protein uL15 / Large ribosomal subunit protein uL11 / Large ribosomal subunit protein bL19 / Large ribosomal subunit protein uL1 / Large ribosomal subunit protein bL20 / Large ribosomal subunit protein bL27 / Large ribosomal subunit protein bL28 / Large ribosomal subunit protein uL29 ...Small ribosomal subunit protein bS6 / Small ribosomal subunit protein uS7 / Large ribosomal subunit protein uL15 / Large ribosomal subunit protein uL11 / Large ribosomal subunit protein bL19 / Large ribosomal subunit protein uL1 / Large ribosomal subunit protein bL20 / Large ribosomal subunit protein bL27 / Large ribosomal subunit protein bL28 / Large ribosomal subunit protein uL29 / Large ribosomal subunit protein bL32 / Large ribosomal subunit protein bL33 / Large ribosomal subunit protein bL34 / Large ribosomal subunit protein bL35 / Large ribosomal subunit protein bL36A / Large ribosomal subunit protein bL9 / Small ribosomal subunit protein uS10 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS12 / Small ribosomal subunit protein uS13 / Small ribosomal subunit protein bS16 / Small ribosomal subunit protein bS18 / Small ribosomal subunit protein uS19 / Small ribosomal subunit protein bS20 / Small ribosomal subunit protein uS2 / Small ribosomal subunit protein uS3 / Small ribosomal subunit protein uS4 / Small ribosomal subunit protein uS5 / Small ribosomal subunit protein uS8 / Small ribosomal subunit protein uS9 / Large ribosomal subunit protein uL13 / Large ribosomal subunit protein uL14 / Large ribosomal subunit protein uL16 / Large ribosomal subunit protein uL23 / Small ribosomal subunit protein uS15 / Large ribosomal subunit protein bL17 / Large ribosomal subunit protein bL21 / Large ribosomal subunit protein uL30 / Large ribosomal subunit protein uL6 / Small ribosomal subunit protein uS14 / Small ribosomal subunit protein uS17 / Large ribosomal subunit protein uL18 / Large ribosomal subunit protein uL2 / Large ribosomal subunit protein uL3 / Large ribosomal subunit protein uL24 / Large ribosomal subunit protein uL4 / Large ribosomal subunit protein uL22 / Large ribosomal subunit protein uL5 / Small ribosomal subunit protein bS21 / Large ribosomal subunit protein bL25
Similarity search - Component
Biological speciesEscherichia coli (E. coli) / synthetic construct (others)
Methodsingle particle reconstruction / cryo EM / Resolution: 15.0 Å
AuthorsFischer N / Konevega AL / Wintermeyer W / Rodnina MV / Stark H
CitationJournal: Nature / Year: 2010
Title: Ribosome dynamics and tRNA movement by time-resolved electron cryomicroscopy.
Authors: Niels Fischer / Andrey L Konevega / Wolfgang Wintermeyer / Marina V Rodnina / Holger Stark /
Abstract: The translocation step of protein synthesis entails large-scale rearrangements of the ribosome-transfer RNA (tRNA) complex. Here we have followed tRNA movement through the ribosome during ...The translocation step of protein synthesis entails large-scale rearrangements of the ribosome-transfer RNA (tRNA) complex. Here we have followed tRNA movement through the ribosome during translocation by time-resolved single-particle electron cryomicroscopy (cryo-EM). Unbiased computational sorting of cryo-EM images yielded 50 distinct three-dimensional reconstructions, showing the tRNAs in classical, hybrid and various novel intermediate states that provide trajectories and kinetic information about tRNA movement through the ribosome. The structures indicate how tRNA movement is coupled with global and local conformational changes of the ribosome, in particular of the head and body of the small ribosomal subunit, and show that dynamic interactions between tRNAs and ribosomal residues confine the path of the tRNAs through the ribosome. The temperature dependence of ribosome dynamics reveals a surprisingly flat energy landscape of conformational variations at physiological temperature. The ribosome functions as a Brownian machine that couples spontaneous conformational changes driven by thermal energy to directed movement.
History
DepositionApr 30, 2010-
Header (metadata) releaseJun 16, 2010-
Map releaseMay 6, 2011-
UpdateJan 29, 2014-
Current statusJan 29, 2014Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 30
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by height
  • Surface level: 30
  • Imaged by UCSF Chimera
  • Download
  • Surface view with fitted model
  • Atomic models: PDB-4v79
  • Surface level: 30
  • Imaged by UCSF Chimera
  • Download
Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_1723.png

Downloads & links

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Map

FileDownload / File: emd_1723.map.gz / Format: CCP4 / Size: 7.8 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationSubstate of E. coli 70S-fMetVal-tRNAVal-tRNAfMet complex in intermediate post-translocation state (post3)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
2.8 Å/pix.
x 128 pix.
= 358.4 Å		2.8 Å/pix.
x 128 pix.
= 358.4 Å		2.8 Å/pix.
x 128 pix.
= 358.4 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 2.8 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 30.0 / Movie #1: 30
Minimum - Maximum-221.637 - 300.565999999999974
Average (Standard dev.)-0.134538 (±28.848800000000001)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions128128128
Spacing128128128
CellA=B=C: 358.4 Å
α=β=γ: 90 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z2.82.82.8
M x/y/z128128128
origin x/y/z0.0000.0000.000
length x/y/z358.400358.400358.400
α/β/γ90.00090.00090.000
start NX/NY/NZ-64-64-64
NX/NY/NZ128128128
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS128128128
D min/max/mean-221.637300.566-0.135

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Supplemental data

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Sample components

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Entire : Substate of E. coli 70S-fMetVal-tRNAVal-tRNAfMet complex in inter...

EntireName: Substate of E. coli 70S-fMetVal-tRNAVal-tRNAfMet complex in intermediate post-translocation state (post3)
Components
  • Sample: Substate of E. coli 70S-fMetVal-tRNAVal-tRNAfMet complex in intermediate post-translocation state (post3)
  • Complex: Ribosome
  • RNA: fMetVal-tRNAVal
  • RNA: tRNAfMet
  • RNA: m022 mRNA

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Supramolecule #1000: Substate of E. coli 70S-fMetVal-tRNAVal-tRNAfMet complex in inter...

SupramoleculeName: Substate of E. coli 70S-fMetVal-tRNAVal-tRNAfMet complex in intermediate post-translocation state (post3)
type: sample / ID: 1000 / Number unique components: 4
Molecular weightTheoretical: 2.5 MDa

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Supramolecule #1: Ribosome

SupramoleculeName: Ribosome / type: complex / ID: 1 / Name.synonym: E. coli 70S / Recombinant expression: No / Ribosome-details: ribosome-prokaryote: ALL
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 2.5 MDa

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Macromolecule #1: fMetVal-tRNAVal

MacromoleculeName: fMetVal-tRNAVal / type: rna / ID: 1 / Name.synonym: peptidyl tRNA / Classification: TRANSFER / Structure: DOUBLE HELIX / Synthetic?: No
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 25 KDa

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Macromolecule #2: tRNAfMet

MacromoleculeName: tRNAfMet / type: rna / ID: 2 / Name.synonym: deacylated tRNA / Classification: TRANSFER / Structure: DOUBLE HELIX / Synthetic?: No
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 25 KDa

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Macromolecule #3: m022 mRNA

MacromoleculeName: m022 mRNA / type: rna / ID: 3 / Name.synonym: mRNA / Details: Coding sequence AUGGUU / Classification: OTHER / Structure: SINGLE STRANDED / Synthetic?: Yes
Source (natural)Organism: synthetic construct (others)

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.5
Details: 50 mM Tris-HCl, 70 mM NH4Cl, 30 mM KCl, 7 mM MgCl2, 0.6 mM spermine, 0.4 mM spermidine
VitrificationCryogen name: ETHANE / Chamber humidity: 75 % / Chamber temperature: 77 K / Instrument: HOMEMADE PLUNGER
Details: Vitrification instrument: Custom-built CEVS. Dew-point temperature (temperature on the grid) adjusted to 18 degrees C
Timed resolved state: Samples were vitrified at different time points along the reaction coordinate (1, 2, 5 and 20 minutes after addition of deacylated tRNAfMet to 70S-fMetVal-tRNAVal complexes)
Method: Manual blotting for about 2 seconds

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Electron microscopy

MicroscopeFEI/PHILIPS CM200FEG
TemperatureAverage: 77 K
Alignment procedureLegacy - Astigmatism: Objective lens astigmatism was corrected at 200,000 times magnification
Image recordingCategory: CCD / Film or detector model: GENERIC TVIPS (4k x 4k) / Average electron dose: 20 e/Å2
Electron beamAcceleration voltage: 160 kV / Electron source: FIELD EMISSION GUN
Electron opticsCalibrated magnification: 162740 / Illumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD / Cs: 2.0 mm / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.5 µm / Nominal magnification: 161000
Sample stageSpecimen holder: Eucentric / Specimen holder model: GATAN LIQUID NITROGEN

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Image processing

CTF correctionDetails: Local
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Algorithm: OTHER / Resolution.type: BY AUTHOR / Resolution: 15.0 Å / Resolution method: FSC 0.5 CUT-OFF / Software - Name: IMAGIC, custom, Spider
Details: Final maps were calculated from 13 datasets acquired at different time points, computationally sorted into distinct substates
Number images used: 5083

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