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- EMDB-1798: tRNA translocation on the 70S ribosome: the pre-translocational t... -

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Basic information

Entry
Database: EMDB / ID: EMD-1798
TitletRNA translocation on the 70S ribosome: the pre-translocational translocation intermediate TI(PRE)
Map dataCryo-EM map of the ribosomal 70S-tRNA-EFG-GDP-FA complex in the TI(PRE) state
Sample
  • Sample: 70S-EFG-GDP-FA complex
  • Complex: 70S ribosome
Keywordstranslation / ribosome / elongation cycle / tRNA translocation
Function / homology
Function and homology information


translation elongation factor activity / large ribosomal subunit / ribosome binding / regulation of translation / ribosomal small subunit assembly / small ribosomal subunit / 5S rRNA binding / large ribosomal subunit rRNA binding / transferase activity / cytosolic small ribosomal subunit ...translation elongation factor activity / large ribosomal subunit / ribosome binding / regulation of translation / ribosomal small subunit assembly / small ribosomal subunit / 5S rRNA binding / large ribosomal subunit rRNA binding / transferase activity / cytosolic small ribosomal subunit / ribosomal large subunit assembly / cytoplasmic translation / cytosolic large ribosomal subunit / tRNA binding / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / ribonucleoprotein complex / translation / GTPase activity / mRNA binding / GTP binding / protein homodimerization activity / zinc ion binding / metal ion binding / cytosol / cytoplasm
Similarity search - Function
Translation elongation factor EFG/EF2 / : / Elongation factor G, domain III / EFG, domain V / Ribosomal protein L7/L12, oligomerisation / Ribosomal protein L7/L12, oligomerisation domain superfamily / Ribosomal protein L7/L12 dimerisation domain / Ribosomal protein L7/L12 / Ribosomal protein L7/L12, C-terminal / Ribosomal protein L7/L12 C-terminal domain ...Translation elongation factor EFG/EF2 / : / Elongation factor G, domain III / EFG, domain V / Ribosomal protein L7/L12, oligomerisation / Ribosomal protein L7/L12, oligomerisation domain superfamily / Ribosomal protein L7/L12 dimerisation domain / Ribosomal protein L7/L12 / Ribosomal protein L7/L12, C-terminal / Ribosomal protein L7/L12 C-terminal domain / Ribosomal protein L7/L12, C-terminal/adaptor protein ClpS-like / Ribosomal protein L1, bacterial-type / Elongation Factor G, domain II / Elongation Factor G, domain III / 30S ribosomal protein Thx / 30S ribosomal protein Thx / 30S ribosomal protein / Ribosomal protein L25, long-form / Translation elongation factor EFG/EF2, domain IV / Elongation factor G, domain IV / Elongation factor G, domain IV / Ribosomal protein L25, beta domain / Ribosomal protein L25, C-terminal / Ribosomal protein TL5, C-terminal domain / Elongation factor G C-terminus / Elongation factor EFG, domain V-like / Elongation factor G C-terminus / EF-G domain III/V-like / Tr-type G domain, conserved site / Translational (tr)-type guanine nucleotide-binding (G) domain signature. / : / Ribosomal protein S14, type Z / Ribosomal protein L1, conserved site / Ribosomal protein L1 signature. / Ribosomal protein L1 / Ribosomal protein L1, 3-layer alpha/beta-sandwich / Translation elongation factor EFTu-like, domain 2 / Ribosomal protein L1-like / Ribosomal protein L1/ribosomal biogenesis protein / Ribosomal protein L1p/L10e family / Elongation factor Tu domain 2 / Ribosomal protein L11, bacterial-type / Ribosomal protein L31 type A / Ribosomal protein L31 signature. / Translational (tr)-type GTP-binding domain / Elongation factor Tu GTP binding domain / Translational (tr)-type guanine nucleotide-binding (G) domain profile. / Ribosomal protein L31 / Ribosomal protein L31 superfamily / Ribosomal protein L31 / : / Ribosomal protein L11, conserved site / Ribosomal protein L11 signature. / Ribosomal L25p family / Ribosomal protein L25 / Ribosomal protein L11, N-terminal / Ribosomal protein L11, N-terminal domain / 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, RNA binding domain / Ribosomal protein L11/L12 / 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 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 S14/S29 / Ribosomal protein L19, conserved site / Ribosomal protein L19 signature. / Ribosomal protein S3, bacterial-type / Ribosomal protein S6, conserved site / Ribosomal protein S6 signature. / Ribosomal protein S19, bacterial-type / Ribosomal protein S13, bacterial-type / Ribosomal protein L36 / Ribosomal protein L36 superfamily / Ribosomal protein L36 / Ribosomal protein S7, bacterial/organellar-type / Ribosomal protein S11, bacterial-type / Ribosomal protein S20 / Ribosomal protein S20 superfamily / Ribosomal protein S20 / Ribosomal protein L20 signature. / Ribosomal protein S9, bacterial/plastid / Ribosomal protein L27, conserved site / Ribosomal protein L27 signature. / Ribosomal protein S4, bacterial-type / 30S ribosomal protein S17
Similarity search - Domain/homology
Small ribosomal subunit protein uS8 / Small ribosomal subunit protein uS14 / Small ribosomal subunit protein uS17 / Large ribosomal subunit protein bL12 / Large ribosomal subunit protein uL6 / Small ribosomal subunit protein uS7 / Large ribosomal subunit protein bL33 / Large ribosomal subunit protein uL2 / Large ribosomal subunit protein uL13 / Large ribosomal subunit protein uL16 ...Small ribosomal subunit protein uS8 / Small ribosomal subunit protein uS14 / Small ribosomal subunit protein uS17 / Large ribosomal subunit protein bL12 / Large ribosomal subunit protein uL6 / Small ribosomal subunit protein uS7 / Large ribosomal subunit protein bL33 / Large ribosomal subunit protein uL2 / Large ribosomal subunit protein uL13 / Large ribosomal subunit protein uL16 / Large ribosomal subunit protein bL19 / Large ribosomal subunit protein bL20 / Large ribosomal subunit protein bL21 / Large ribosomal subunit protein bL27 / Large ribosomal subunit protein bL28 / Large ribosomal subunit protein bL32 / Large ribosomal subunit protein bL34 / Small ribosomal subunit protein uS2 / Small ribosomal subunit protein uS3 / Small ribosomal subunit protein uS4 / Small ribosomal subunit protein uS9 / Small ribosomal subunit protein uS11 / Small ribosomal subunit protein uS13 / Small ribosomal subunit protein bS20 / Small ribosomal subunit protein uS12 / Elongation factor G / Small ribosomal subunit protein uS10 / Large ribosomal subunit protein uL3 / Large ribosomal subunit protein uL4 / Large ribosomal subunit protein uL23 / Small ribosomal subunit protein uS19 / Large ribosomal subunit protein uL22 / Large ribosomal subunit protein uL29 / 30S ribosomal protein S17 / Large ribosomal subunit protein uL14 / Large ribosomal subunit protein uL24 / Large ribosomal subunit protein uL5 / 30S ribosomal protein S14 type Z / 30S ribosomal protein S8 / 50S ribosomal protein L6 / Large ribosomal subunit protein uL18 / Small ribosomal subunit protein uS5 / Large ribosomal subunit protein uL30 / Large ribosomal subunit protein uL15 / Large ribosomal subunit protein bL36 / Large ribosomal subunit protein bL25 / Small ribosomal subunit protein bTHX / Small ribosomal subunit protein uS15 / Large ribosomal subunit protein bL31 / Small ribosomal subunit protein bS16 / Large ribosomal subunit protein bL35 / Large ribosomal subunit protein uL11 / Large ribosomal subunit protein uL1 / Small ribosomal subunit protein bS6 / Small ribosomal subunit protein bS18 / Large ribosomal subunit protein bL17
Similarity search - Component
Biological speciesThermus thermophilus HB8 (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 7.8 Å
AuthorsRatje AH / Loerke J / Mikolajka A / Bruenner M / Hildebrand PW / Starosta AL / Doenhoefer A / Connell SR / Fucini P / Mielke T ...Ratje AH / Loerke J / Mikolajka A / Bruenner M / Hildebrand PW / Starosta AL / Doenhoefer A / Connell SR / Fucini P / Mielke T / Whitford PC / Onuchic J / Yu Y / Sanbonmatsu KY / Hartmann RK / Penczek PA / Wilson DN / Spahn CMT
CitationJournal: Nature / Year: 2010
Title: Head swivel on the ribosome facilitates translocation by means of intra-subunit tRNA hybrid sites.
Authors: Andreas H Ratje / Justus Loerke / Aleksandra Mikolajka / Matthias Brünner / Peter W Hildebrand / Agata L Starosta / Alexandra Dönhöfer / Sean R Connell / Paola Fucini / Thorsten Mielke / ...Authors: Andreas H Ratje / Justus Loerke / Aleksandra Mikolajka / Matthias Brünner / Peter W Hildebrand / Agata L Starosta / Alexandra Dönhöfer / Sean R Connell / Paola Fucini / Thorsten Mielke / Paul C Whitford / José N Onuchic / Yanan Yu / Karissa Y Sanbonmatsu / Roland K Hartmann / Pawel A Penczek / Daniel N Wilson / Christian M T Spahn /
Abstract: The elongation cycle of protein synthesis involves the delivery of aminoacyl-transfer RNAs to the aminoacyl-tRNA-binding site (A site) of the ribosome, followed by peptide-bond formation and ...The elongation cycle of protein synthesis involves the delivery of aminoacyl-transfer RNAs to the aminoacyl-tRNA-binding site (A site) of the ribosome, followed by peptide-bond formation and translocation of the tRNAs through the ribosome to reopen the A site. The translocation reaction is catalysed by elongation factor G (EF-G) in a GTP-dependent manner. Despite the availability of structures of various EF-G-ribosome complexes, the precise mechanism by which tRNAs move through the ribosome still remains unclear. Here we use multiparticle cryoelectron microscopy analysis to resolve two previously unseen subpopulations within Thermus thermophilus EF-G-ribosome complexes at subnanometre resolution, one of them with a partly translocated tRNA. Comparison of these substates reveals that translocation of tRNA on the 30S subunit parallels the swivelling of the 30S head and is coupled to unratcheting of the 30S body. Because the tRNA maintains contact with the peptidyl-tRNA-binding site (P site) on the 30S head and simultaneously establishes interaction with the exit site (E site) on the 30S platform, a novel intra-subunit 'pe/E' hybrid state is formed. This state is stabilized by domain IV of EF-G, which interacts with the swivelled 30S-head conformation. These findings provide direct structural and mechanistic insight into the 'missing link' in terms of tRNA intermediates involved in the universally conserved translocation process.
History
DepositionSep 28, 2010-
Header (metadata) releaseOct 27, 2010-
Map releaseNov 26, 2010-
UpdateOct 10, 2012-
Current statusOct 10, 2012Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 3000
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by height
  • Surface level: 3000
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-4v5m
  • Surface level: 3000
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

1798.tif

Downloads & links

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Map

FileDownload / File: emd_1798.map.gz / Format: CCP4 / Size: 100.6 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationCryo-EM map of the ribosomal 70S-tRNA-EFG-GDP-FA complex in the TI(PRE) state
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)X (Row.)Y (Col.)
1.26 Å/pix.
x 300 pix.
= 378. Å		1.26 Å/pix.
x 300 pix.
= 378. Å		1.26 Å/pix.
x 300 pix.
= 378. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.26 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy EMDB: 3000.0 / Movie #1: 3000
Minimum - Maximum-6356.590000000000146 - 13410.899999999999636
Average (Standard dev.)213.062999999999988 (±916.721000000000004)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderYXZ
Origin-150-150-149
Dimensions300300300
Spacing300300300
CellA=B=C: 378 Å
α=β=γ: 90 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.261.261.26
M x/y/z300300300
origin x/y/z0.0000.0000.000
length x/y/z378.000378.000378.000
α/β/γ90.00090.00090.000
start NX/NY/NZ-150-150-149
NX/NY/NZ300300300
MAP C/R/S213
start NC/NR/NS-150-150-149
NC/NR/NS300300300
D min/max/mean-6356.58913410.853213.063

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Supplemental data

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Sample components

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Entire : 70S-EFG-GDP-FA complex

EntireName: 70S-EFG-GDP-FA complex
Components
  • Sample: 70S-EFG-GDP-FA complex
  • Complex: 70S ribosome

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Supramolecule #1000: 70S-EFG-GDP-FA complex

SupramoleculeName: 70S-EFG-GDP-FA complex / type: sample / ID: 1000 / Oligomeric state: Monomer / Number unique components: 1

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Supramolecule #1: 70S ribosome

SupramoleculeName: 70S ribosome / type: complex / ID: 1 / Name.synonym: Thermus thermophilus 70S ribosome / Recombinant expression: No / Ribosome-details: ribosome-prokaryote: ALL
Source (natural)Organism: Thermus thermophilus HB8 (bacteria)

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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

VitrificationCryogen name: ETHANE / Instrument: OTHER / Details: Vitrification instrument: Vitrobot (FEI)

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Electron microscopy

MicroscopeFEI POLARA 300
TemperatureAverage: 77 K
Alignment procedureLegacy - Astigmatism: Objective lens astigmatism was corrected at 200,000 times magnification
DetailsLow-dose
Image recordingCategory: FILM / Film or detector model: KODAK SO-163 FILM / Digitization - Scanner: PRIMESCAN / Digitization - Sampling interval: 4.7 µm / Number real images: 677 / Average electron dose: 20 e/Å2 / Bits/pixel: 16
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsCalibrated magnification: 65520 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.0 mm / Nominal defocus max: 4.0 µm / Nominal defocus min: 2.0 µm / Nominal magnification: 39000
Sample stageSpecimen holder: Cartridge / Specimen holder model: GATAN HELIUM
Experimental equipment
Model: Tecnai Polara / Image courtesy: FEI Company

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Image processing

CTF correctionDetails: Defocus groups
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Algorithm: OTHER / Resolution.type: BY AUTHOR / Resolution: 7.8 Å / Resolution method: FSC 0.5 CUT-OFF / Software - Name: Spider

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Atomic model buiding 1

Initial modelPDB ID:

2wrj
PDB Unreleased entry

SoftwareName: Gromacs
DetailsProtocol: MDFIT
RefinementSpace: REAL / Protocol: FLEXIBLE FIT
Output model

PDB-4v5m:
tRNA tranlocation on the 70S ribosome: the pre-translocational translocation intermediate TI(PRE)

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Atomic model buiding 2

Initial modelPDB ID:

2wri
PDB Unreleased entry

SoftwareName: Gromacs
DetailsProtocol: MDFIT
RefinementSpace: REAL / Protocol: FLEXIBLE FIT
Output model

PDB-4v5m:
tRNA tranlocation on the 70S ribosome: the pre-translocational translocation intermediate TI(PRE)

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