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- PDB-5uq7: 70S ribosome complex with dnaX mRNA stemloop and E-site tRNA ("in... -
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Open data
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Basic information
Entry | Database: PDB / ID: 5uq7 | |||||||||||||||||||||||||||||||||
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Title | 70S ribosome complex with dnaX mRNA stemloop and E-site tRNA ("in" conformation) | |||||||||||||||||||||||||||||||||
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![]() | RIBOSOME / 70S ribosome / dnaX / stem-loop / structured mRNA / -1 programmed frameshifting / E site | |||||||||||||||||||||||||||||||||
Function / homology | ![]() regulation of translation / large ribosomal subunit / transferase activity / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / 5S rRNA binding / ribosomal large subunit assembly / cytosolic small ribosomal subunit ...regulation of translation / large ribosomal subunit / transferase activity / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / small ribosomal subunit rRNA binding / 5S rRNA binding / ribosomal large subunit assembly / cytosolic small ribosomal subunit / large ribosomal subunit rRNA binding / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / translation / ribonucleoprotein complex / mRNA binding / zinc ion binding / metal ion binding / cytosol / cytoplasm Similarity search - Function | |||||||||||||||||||||||||||||||||
Biological species | ![]() ![]() ![]() ![]() synthetic construct (others) | |||||||||||||||||||||||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.5 Å | |||||||||||||||||||||||||||||||||
![]() | Zhang, Y. / Hong, S. / Skiniotis, G. / Dunham, C.M. | |||||||||||||||||||||||||||||||||
![]() | ![]() Title: Alternative Mode of E-Site tRNA Binding in the Presence of a Downstream mRNA Stem Loop at the Entrance Channel. Authors: Yan Zhang / Samuel Hong / Ajchareeya Ruangprasert / Georgios Skiniotis / Christine M Dunham / ![]() Abstract: Structured mRNAs positioned downstream of the ribosomal decoding center alter gene expression by slowing protein synthesis. Here, we solved the cryo-EM structure of the bacterial ribosome bound to an ...Structured mRNAs positioned downstream of the ribosomal decoding center alter gene expression by slowing protein synthesis. Here, we solved the cryo-EM structure of the bacterial ribosome bound to an mRNA containing a 3' stem loop that regulates translation. Unexpectedly, the E-site tRNA adopts two distinct orientations. In the first structure, normal interactions with the 50S and 30S E site are observed. However, in the second structure, although the E-site tRNA makes normal interactions with the 50S E site, its anticodon stem loop moves ∼54 Å away from the 30S E site to interact with the 30S head domain and 50S uL5. This position of the E-site tRNA causes the uL1 stalk to adopt a more open conformation that likely represents an intermediate state during E-site tRNA dissociation. These results suggest that structured mRNAs at the entrance channel restrict 30S subunit movement required during translation to slow E-site tRNA dissociation. | |||||||||||||||||||||||||||||||||
History |
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Structure visualization
Movie |
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 3.3 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 1.5 MB | Display | ![]() |
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Full document | ![]() | 1.6 MB | Display | |
Data in XML | ![]() | 200.9 KB | Display | |
Data in CIF | ![]() | 364.1 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8596MC ![]() 8597C ![]() 5uq8C 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 , 6 types, 6 molecules ABayzx
#1: RNA chain | Mass: 948035.625 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: GenBank: 55771382 |
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#2: RNA chain | Mass: 38882.207 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: GenBank: 55771382 |
#32: RNA chain | Mass: 493903.656 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: GenBank: 55771382 |
#53: RNA chain | Mass: 24801.801 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#55: RNA chain | Mass: 24485.539 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#56: RNA chain | Mass: 17773.668 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) |
+50S ribosomal protein ... , 30 types, 30 molecules DEFGHINOPQRSTUVWXYZ0123456789C
-30S ribosomal protein ... , 20 types, 20 molecules bcdefghijklmnopqrstu
#33: Protein | Mass: 26646.852 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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#34: Protein | Mass: 22862.430 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80372 |
#35: Protein | Mass: 24242.254 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80373 |
#36: Protein | Mass: 16144.848 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHQ5 |
#37: Protein | Mass: 11917.675 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SLP8 |
#38: Protein | Mass: 17919.775 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P17291 |
#39: Protein | Mass: 15737.372 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHQ2, UniProt: A0A0M9AFS9*PLUS |
#40: Protein | Mass: 14122.225 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80374 |
#41: Protein | Mass: 11056.838 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHN7 |
#42: Protein | Mass: 12032.662 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80376 |
#43: Protein | Mass: 13650.211 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHN3 |
#44: Protein | Mass: 13067.221 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80377 |
#45: Protein | Mass: 7027.529 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHQ1, UniProt: A0A0N0BLP2*PLUS |
#46: Protein | Mass: 10447.213 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SJ76 |
#47: Protein | Mass: 9795.354 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SJH3 |
#48: Protein | Mass: 11722.904 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHP7, UniProt: A0A0N0BLS5*PLUS |
#49: Protein | Mass: 7897.451 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SLQ0 |
#50: Protein | Mass: 9455.995 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SHP2 |
#51: Protein | Mass: 10876.067 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: P80380 |
#52: Protein/peptide | Mass: 2831.295 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() ![]() Strain: HB8 / ATCC 27634 / DSM 579 / References: UniProt: Q5SIH3 |
-Non-polymers , 2 types, 7 molecules 


#57: Chemical | ChemComp-ZN / #58: Chemical | ChemComp-SF4 / | |
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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: 70S-dnaX complex / Type: RIBOSOME / Entity ID: #1-#56 / Source: MULTIPLE SOURCES |
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Source (natural) | Organism: ![]() ![]() |
Buffer solution | pH: 7.5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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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 |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD |
Image recording | Electron dose: 30 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
Image scans | Movie frames/image: 60 |
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Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||
3D reconstruction | Resolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Algorithm: BACK PROJECTION | |||||||||
Atomic model building | Protocol: RIGID BODY FIT / Space: REAL | |||||||||
Refinement | Resolution: 3.5→384 Å / Cross valid method: FREE R-VALUE |