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- PDB-5lmn: Structure of bacterial 30S-IF1-IF3-mRNA translation pre-initiatio... -
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Open data
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Basic information
Entry | Database: PDB / ID: 5lmn | ||||||||||||
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Title | Structure of bacterial 30S-IF1-IF3-mRNA translation pre-initiation complex (state-1A) | ||||||||||||
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![]() | RIBOSOME / translation / initiation factors / 30S / IF1 / IF3 / PIC / Thermus thermophilus | ||||||||||||
Function / homology | ![]() ribosome disassembly / translation initiation factor activity / ribosome binding / ribosomal small subunit assembly / ribosomal small subunit biogenesis / small ribosomal subunit / small ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / tRNA binding / rRNA binding ...ribosome disassembly / translation initiation factor activity / ribosome binding / ribosomal small subunit assembly / ribosomal small subunit biogenesis / small ribosomal subunit / small ribosomal subunit rRNA binding / cytosolic small ribosomal subunit / tRNA binding / rRNA binding / ribosome / structural constituent of ribosome / translation / ribonucleoprotein complex / mRNA binding / zinc ion binding / membrane / metal ion binding / cytosol / cytoplasm Similarity search - Function | ||||||||||||
Biological species | ![]() ![]() ![]() ![]() | ||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.55 Å | ||||||||||||
![]() | Hussain, T. / Llacer, J.L. / Wimberly, B.T. / Ramakrishnan, V. | ||||||||||||
Funding support | ![]() ![]()
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![]() | ![]() Title: Large-Scale Movements of IF3 and tRNA during Bacterial Translation Initiation. Authors: Tanweer Hussain / Jose L Llácer / Brian T Wimberly / Jeffrey S Kieft / V Ramakrishnan / ![]() ![]() Abstract: In bacterial translational initiation, three initiation factors (IFs 1-3) enable the selection of initiator tRNA and the start codon in the P site of the 30S ribosomal subunit. Here, we report 11 ...In bacterial translational initiation, three initiation factors (IFs 1-3) enable the selection of initiator tRNA and the start codon in the P site of the 30S ribosomal subunit. Here, we report 11 single-particle cryo-electron microscopy (cryoEM) reconstructions of the complex of bacterial 30S subunit with initiator tRNA, mRNA, and IFs 1-3, representing different steps along the initiation pathway. IF1 provides key anchoring points for IF2 and IF3, thereby enhancing their activities. IF2 positions a domain in an extended conformation appropriate for capturing the formylmethionyl moiety charged on tRNA. IF3 and tRNA undergo large conformational changes to facilitate the accommodation of the formylmethionyl-tRNA (fMet-tRNA(fMet)) into the P site for start codon recognition. | ||||||||||||
History |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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Download
PDBx/mmCIF format | ![]() | 1.4 MB | Display | ![]() |
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PDB format | ![]() | 1.1 MB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 1.4 MB | Display | ![]() |
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Full document | ![]() | 1.6 MB | Display | |
Data in XML | ![]() | 120.5 KB | Display | |
Data in CIF | ![]() | 191.8 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 4073MC ![]() 4074C ![]() 4075C ![]() 4076C ![]() 4077C ![]() 4078C ![]() 4079C ![]() 4080C ![]() 4081C ![]() 4082C ![]() 4083C ![]() 5lmoC ![]() 5lmpC ![]() 5lmqC ![]() 5lmrC ![]() 5lmsC ![]() 5lmtC ![]() 5lmuC ![]() 5lmvC 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
-RNA chain , 2 types, 2 molecules AY
#1: RNA chain | Mass: 493958.281 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#24: RNA chain | Mass: 13466.019 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) ![]() ![]() |
-30S ribosomal protein ... , 20 types, 20 molecules BCDEFGHIJKLMNOPQRSTV
#2: Protein | Mass: 29317.703 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80371 |
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#3: Protein | Mass: 26751.076 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80372 |
#4: Protein | Mass: 24373.447 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80373 |
#5: Protein | Mass: 17583.416 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Uniprot code Q5SHQ5 Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHQ5 |
#6: Protein | Mass: 11988.753 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Uniprot code Q5SLP8 Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SLP8 |
#7: Protein | Mass: 18050.973 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Uniprot code P17291 Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P17291 |
#8: Protein | Mass: 15868.570 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Uniprot code Q5SHQ2 Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHQ2, UniProt: P0DOY9*PLUS |
#9: Protein | Mass: 14410.614 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Uniprot code P80374 Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80374 |
#10: Protein | Mass: 11954.968 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Uniprot code Q5SHN7 Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHN7 |
#11: Protein | Mass: 13737.868 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Uniprot code P80376 Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80376 |
#12: Protein | Mass: 14637.384 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Uniprot code Q5SHN3 Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHN3 |
#13: Protein | Mass: 14338.861 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: P80377 Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80377 |
#14: Protein | Mass: 7158.725 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Q5SHQ1 Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHQ1, UniProt: P0DOY6*PLUS |
#15: Protein | Mass: 10578.407 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Q5SJ76 Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SJ76 |
#16: Protein | Mass: 10409.983 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Q5SJH3 Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SJH3 |
#17: Protein | Mass: 12325.655 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Q5SHP7 Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHP7, UniProt: P0DOY7*PLUS |
#18: Protein | Mass: 10258.299 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Q5SLQ0 Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SLQ0 |
#19: Protein | Mass: 10605.464 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Q5SHP2 Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHP2 |
#20: Protein | Mass: 11736.143 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: P80380 Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80380 |
#21: Protein/peptide | Mass: 3350.030 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Q5SIH3 Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SIH3 |
-Translation initiation factor IF- ... , 2 types, 2 molecules WX
#22: Protein | Mass: 8247.664 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Details: Q5SHR1 Source: (gene. exp.) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / Gene: infA, TTHA1669 / Production host: ![]() ![]() |
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#23: Protein | Mass: 19904.377 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Details: Q5SKU2 Source: (gene. exp.) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / Gene: infC, TTHA0551 / Production host: ![]() ![]() |
-Non-polymers , 2 types, 129 molecules 


#25: Chemical | ChemComp-MG / #26: Chemical | |
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-Details
Has protein modification | Y |
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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 |
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Sample preparation
Component | Name: 30S-IF1-IF3-mRNA pre-initiation complex (state-1A) / Type: RIBOSOME / Entity ID: #1-#24 / Source: MULTIPLE SOURCES | ||||||||||||||||||||||||
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Molecular weight | Value: 0.8261 MDa / Experimental value: NO | ||||||||||||||||||||||||
Buffer solution | pH: 7.5 | ||||||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 0.08 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||
Specimen support | Grid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: Quantifoil | ||||||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK I / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Tecnai Polara / Image courtesy: FEI Company |
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Microscopy | Model: FEI POLARA 300 |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 78000 X / Calibrated magnification: 104478 X / Nominal defocus max: 3500 nm / Nominal defocus min: 1500 nm / Cs: 2 mm / C2 aperture diameter: 50 µm / Alignment procedure: COMA FREE |
Specimen holder | Cryogen: NITROGEN / Temperature (max): 100 K / Temperature (min): 90 K |
Image recording | Average exposure time: 1.1 sec. / Electron dose: 30 e/Å2 / Film or detector model: OTHER / Num. of grids imaged: 5 / Num. of real images: 4400 Details: Recorded in a FEI Falcon III direct electron detector. Images were collected in movie-mode at 32 frames per second |
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Processing
EM software |
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Image processing | Details: FEI Falcon III | ||||||||||||||||||||||||||||||||||||||||||||||||
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 666610 | ||||||||||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.55 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 86892 / Algorithm: FOURIER SPACE / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||||||||||
Atomic model building | B value: 89.7 / Protocol: OTHER / Space: RECIPROCAL / Target criteria: FSC |