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- PDB-8ptx: Cryo-EM structure of human Elp123 in complex with tRNA, acetyl-Co... -
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Open data
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Basic information
Entry | Database: PDB / ID: 8ptx | ||||||
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Title | Cryo-EM structure of human Elp123 in complex with tRNA, acetyl-CoA, 5'-deoxyadenosine and methionine | ||||||
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Function / homology | ![]() phosphorylase kinase regulator activity / tRNA uridine(34) acetyltransferase activity / elongator holoenzyme complex / tRNA wobble base 5-methoxycarbonylmethyl-2-thiouridinylation / tRNA wobble uridine modification / regulation of receptor signaling pathway via JAK-STAT / ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ![]() ![]() ![]() | ||||||
![]() | Abbassi, N. / Jaciuk, M. / Lin, T.-Y. / Glatt, S. | ||||||
Funding support | European Union, 1items
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![]() | ![]() Title: Cryo-EM structures of the human Elongator complex at work. Authors: Nour-El-Hana Abbassi / Marcin Jaciuk / David Scherf / Pauline Böhnert / Alexander Rau / Alexander Hammermeister / Michał Rawski / Paulina Indyka / Grzegorz Wazny / Andrzej Chramiec- ...Authors: Nour-El-Hana Abbassi / Marcin Jaciuk / David Scherf / Pauline Böhnert / Alexander Rau / Alexander Hammermeister / Michał Rawski / Paulina Indyka / Grzegorz Wazny / Andrzej Chramiec-Głąbik / Dominika Dobosz / Bozena Skupien-Rabian / Urszula Jankowska / Juri Rappsilber / Raffael Schaffrath / Ting-Yu Lin / Sebastian Glatt / ![]() ![]() ![]() Abstract: tRNA modifications affect ribosomal elongation speed and co-translational folding dynamics. The Elongator complex is responsible for introducing 5-carboxymethyl at wobble uridine bases (cmU) in ...tRNA modifications affect ribosomal elongation speed and co-translational folding dynamics. The Elongator complex is responsible for introducing 5-carboxymethyl at wobble uridine bases (cmU) in eukaryotic tRNAs. However, the structure and function of human Elongator remain poorly understood. In this study, we present a series of cryo-EM structures of human ELP123 in complex with tRNA and cofactors at four different stages of the reaction. The structures at resolutions of up to 2.9 Å together with complementary functional analyses reveal the molecular mechanism of the modification reaction. Our results show that tRNA binding exposes a universally conserved uridine at position 33 (U), which triggers acetyl-CoA hydrolysis. We identify a series of conserved residues that are crucial for the radical-based acetylation of U and profile the molecular effects of patient-derived mutations. Together, we provide the high-resolution view of human Elongator and reveal its detailed mechanism of action. | ||||||
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 638.5 KB | Display | ![]() |
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PDB format | ![]() | 496.1 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 17924MC ![]() 8ptyC ![]() 8ptzC ![]() 8pu0C M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Elongator complex protein ... , 3 types, 4 molecules ADBC
#1: Protein | Mass: 150427.484 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() #2: Protein | | Mass: 92597.766 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() #3: Protein | | Mass: 65740.539 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() References: UniProt: Q9H9T3, ![]() |
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-RNA chain , 1 types, 1 molecules X
#4: RNA chain | Mass: 24047.236 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) ![]() ![]() |
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-Non-polymers , 5 types, 8 molecules ![](data/chem/img/SF4.gif)
![](data/chem/img/5AD.gif)
![](data/chem/img/ACO.gif)
![](data/chem/img/MET.gif)
![](data/chem/img/MG.gif)
![](data/chem/img/5AD.gif)
![](data/chem/img/ACO.gif)
![](data/chem/img/MET.gif)
![](data/chem/img/MG.gif)
#5: Chemical | ChemComp-SF4 / ![]() |
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#6: Chemical | ChemComp-5AD / ![]() |
#7: Chemical | ChemComp-ACO / ![]() |
#8: Chemical | ChemComp-MET / ![]() |
#9: Chemical | ChemComp-MG / |
-Details
Has ligand of interest | Y |
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-Experimental details
-Experiment
Experiment | Method: ![]() |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: ![]() |
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Sample preparation
Component | Name: Human Elp123 in complex with glutamine tRNA, acetyl-CoA, 5'-deoxyadenosine and methionine Type: COMPLEX / Entity ID: #1-#4 / Source: RECOMBINANT | |||||||||||||||||||||||||
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Molecular weight | Value: 0.635 MDa / Experimental value: NO | |||||||||||||||||||||||||
Source (natural) | Organism: ![]() ![]() | |||||||||||||||||||||||||
Source (recombinant) | Organism: ![]() ![]() ![]() | |||||||||||||||||||||||||
Buffer solution | pH: 7.5 | |||||||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 0.6 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied![]() ![]() | |||||||||||||||||||||||||
Specimen support | Details: 8 mA / Grid material: COPPER / Grid mesh size: 200 divisions/in. / Grid type: Quantifoil R2/1 | |||||||||||||||||||||||||
Vitrification![]() | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K / Details: 15 s wait time, blot force 5, 5 s blot time |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: TFS KRIOS |
Electron gun | Electron source![]() ![]() |
Electron lens | Mode: BRIGHT FIELD![]() ![]() |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Electron dose: 40.09 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of real images: 4214 |
EM imaging optics | Energyfilter name![]() |
Image scans | Width: 5760 / Height: 4092 |
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Processing
EM software | Name: PHENIX / Version: 1.20.1_4487: / Category: model refinement | ||||||||||||||||||||||||
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Image processing | Details: 20 eV slit, fully tuned before the experiment | ||||||||||||||||||||||||
CTF correction![]() | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
Particle selection | Num. of particles selected: 1250013 Details: given number of particles is the sum of blob and 3x TOPAZ pickings, each firstly curated in 2D classification | ||||||||||||||||||||||||
3D reconstruction![]() | Resolution: 2.87 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 215353 / Symmetry type: POINT | ||||||||||||||||||||||||
Atomic model building |
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Refine LS restraints |
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