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- PDB-3jce: Structure of Escherichia coli EF4 in pretranslocational ribosomes... -
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Open data
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Basic information
Entry | Database: PDB / ID: 3jce | ||||||||||||
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Title | Structure of Escherichia coli EF4 in pretranslocational ribosomes (Pre EF4) | ||||||||||||
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![]() | RIBOSOME / ribosome elongation / GTPase EF4 / tRNA back-translocation / P-loop | ||||||||||||
Function / homology | ![]() : / membrane scission GTPase motor activity / response to pH / guanosine tetraphosphate binding / stringent response / ribosomal large subunit binding / ornithine decarboxylase inhibitor activity / transcription antitermination factor activity, RNA binding / misfolded RNA binding / Group I intron splicing ...: / membrane scission GTPase motor activity / response to pH / guanosine tetraphosphate binding / stringent response / ribosomal large subunit binding / ornithine decarboxylase inhibitor activity / transcription antitermination factor activity, RNA binding / misfolded RNA binding / Group I intron splicing / ribosomal small subunit binding / RNA folding / transcriptional attenuation / translation elongation factor activity / positive regulation of ribosome biogenesis / endoribonuclease inhibitor activity / RNA-binding transcription regulator activity / translational termination / negative regulation of cytoplasmic translation / four-way junction DNA binding / DnaA-L2 complex / translation repressor activity / negative regulation of translational initiation / response to salt stress / regulation of mRNA stability / negative regulation of DNA-templated DNA replication initiation / mRNA regulatory element binding translation repressor activity / assembly of large subunit precursor of preribosome / response to cold / positive regulation of RNA splicing / ribosome assembly / transcription elongation factor complex / regulation of DNA-templated transcription elongation / cytosolic ribosome assembly / positive regulation of translation / response to reactive oxygen species / DNA endonuclease activity / transcription antitermination / regulation of cell growth / DNA-templated transcription termination / response to radiation / maintenance of translational fidelity / mRNA 5'-UTR binding / regulation of translation / ribosome biogenesis / large ribosomal subunit / transferase activity / ribosome binding / ribosomal small subunit biogenesis / ribosomal small subunit assembly / small ribosomal subunit / 5S rRNA binding / ribosomal large subunit assembly / cytosolic small ribosomal subunit / large ribosomal subunit rRNA binding / small ribosomal subunit rRNA binding / cytosolic large ribosomal subunit / cytoplasmic translation / tRNA binding / negative regulation of translation / rRNA binding / ribosome / structural constituent of ribosome / translation / response to antibiotic / negative regulation of DNA-templated transcription / GTPase activity / mRNA binding / GTP binding / DNA binding / RNA binding / zinc ion binding / identical protein binding / membrane / plasma membrane / cytosol / cytoplasm Similarity search - Function | ||||||||||||
Biological species | ![]() ![]() synthetic construct (others) | ||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å | ||||||||||||
![]() | Zhang, D. / Yan, K. / Liu, G. / Song, G. / Luo, J. / Shi, Y. / Cheng, E. / Wu, S. / Jiang, T. / Low, J. ...Zhang, D. / Yan, K. / Liu, G. / Song, G. / Luo, J. / Shi, Y. / Cheng, E. / Wu, S. / Jiang, T. / Low, J. / Gao, N. / Qin, Y. | ||||||||||||
![]() | ![]() Title: EF4 disengages the peptidyl-tRNA CCA end and facilitates back-translocation on the 70S ribosome. Authors: Dejiu Zhang / Kaige Yan / Guangqiao Liu / Guangtao Song / Jiejian Luo / Yi Shi / Erchao Cheng / Shan Wu / Taijiao Jiang / Jizhong Lou / Ning Gao / Yan Qin / ![]() Abstract: EF4 catalyzes tRNA back-translocation through an unknown mechanism. We report cryo-EM structures of Escherichia coli EF4 in post- and pretranslocational ribosomes (Post- and Pre-EF4) at 3.7- and 3.2- ...EF4 catalyzes tRNA back-translocation through an unknown mechanism. We report cryo-EM structures of Escherichia coli EF4 in post- and pretranslocational ribosomes (Post- and Pre-EF4) at 3.7- and 3.2-Å resolution, respectively. In Post-EF4, peptidyl-tRNA occupies the peptidyl (P) site, but the interaction between its CCA end and the P loop is disrupted. In Pre-EF4, the peptidyl-tRNA assumes a unique position near the aminoacyl (A) site, denoted the A site/EF4 bound (A/4) site, with a large displacement at its acceptor arm. Mutagenesis analyses suggest that a specific region in the EF4 C-terminal domain (CTD) interferes with base-pairing between the peptidyl-tRNA 3'-CCA and the P loop, whereas the EF4 CTD enhances peptidyl-tRNA interaction at the A/4 site. Therefore, EF4 induces back-translocation by disengaging the tRNA's CCA end from the peptidyl transferase center of the translating ribosome. | ||||||||||||
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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Download
PDBx/mmCIF format | ![]() | 3.7 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 1.7 MB | Display | ![]() |
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Full document | ![]() | 1.8 MB | Display | |
Data in XML | ![]() | 217.7 KB | Display | |
Data in CIF | ![]() | 390.7 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6550MC ![]() 6549C ![]() 3jcdC 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, 7 molecules aAB6978
#1: RNA chain | Mass: 496892.375 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() | ||||
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#28: RNA chain | Mass: 941612.375 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() | ||||
#29: RNA chain | Mass: 38790.090 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() | ||||
#54: RNA chain | Mass: 24485.539 Da / Num. of mol.: 2 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) #55: RNA chain | | Mass: 4784.921 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) #56: RNA chain | | Mass: 24802.785 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) |
-30S ribosomal protein ... , 20 types, 20 molecules cdefghijklmnopqrstub
#2: Protein | Mass: 26031.316 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
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#3: Protein | Mass: 23514.199 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#4: Protein | Mass: 17629.398 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#5: Protein | Mass: 15727.512 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#6: Protein | Mass: 20055.156 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#7: Protein | Mass: 14146.557 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#8: Protein | Mass: 14886.270 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#9: Protein | Mass: 11755.597 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#10: Protein | Mass: 13870.975 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#11: Protein | Mass: 13768.157 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#12: Protein | Mass: 13128.467 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#13: Protein | Mass: 11606.560 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#14: Protein | Mass: 10290.816 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#15: Protein | Mass: 9207.572 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#16: Protein | Mass: 9724.491 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#17: Protein | Mass: 9005.472 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#18: Protein | Mass: 10455.355 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#19: Protein | Mass: 9708.464 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#20: Protein | Mass: 8524.039 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
#21: Protein | Mass: 26781.670 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
+50S ribosomal protein ... , 29 types, 29 molecules 01234CDEFGHIJKLMNOPQRSTUVWXYZ
-Protein , 2 types, 2 molecules 5x
#27: Protein | Mass: 24765.660 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() |
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#57: Protein | Mass: 66652.094 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() References: UniProt: P60785, Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement |
-Non-polymers , 3 types, 3 molecules 




#58: Chemical | ChemComp-PHE / |
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#59: Chemical | ChemComp-GNP / |
#60: Chemical | ChemComp-MG / |
-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
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Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / 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 / Date: Oct 20, 2014 |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD |
Specimen holder | Tilt angle max: 0 ° / Tilt angle min: 0 ° |
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||
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3D reconstruction | Resolution: 3.2 Å / Num. of particles: 107706 Details: (SINGLE PARTICLE DETAILS: THE PARTICLES WERE SELECTED USING AN AUTOMATIC SELECTION PROGRAM.) (SINGLE PARTICLE- -APPLIED SYMMETRY: C1) Symmetry type: POINT | ||||||||||||
Atomic model building | Protocol: FLEXIBLE FIT / Space: REAL / Details: REFINEMENT PROTOCOL--FLEXIBLE | ||||||||||||
Atomic model building | PDB-ID: 4V9O Accession code: 4V9O / Source name: PDB / Type: experimental model | ||||||||||||
Refinement | Highest resolution: 3.2 Å | ||||||||||||
Refinement step | Cycle: LAST / Highest resolution: 3.2 Å
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