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Yorodumi- EMDB-17926: Cryo-EM structure of human Elp123 in complex with tRNA, S-ethyl-C... -
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Basic information
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| Title | Cryo-EM structure of human Elp123 in complex with tRNA, S-ethyl-CoA, 5'-deoxyadenosine and methionine | |||||||||
Map data | deepEMhancer sharpened map | |||||||||
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Keywords | Elongator / tRNA modification / acetyl-CoA hydrolysis / TRANSLATION | |||||||||
| Function / homology | Function and homology informationphosphorylase kinase regulator activity / tRNA uridine(34) acetyltransferase activity / tRNA carboxymethyluridine synthase / elongator holoenzyme complex / tRNA wobble base 5-methoxycarbonylmethyl-2-thiouridinylation / tRNA wobble uridine modification / regulation of receptor signaling pathway via JAK-STAT / acetyltransferase activity / central nervous system development / transcription elongation factor complex ...phosphorylase kinase regulator activity / tRNA uridine(34) acetyltransferase activity / tRNA carboxymethyluridine synthase / elongator holoenzyme complex / tRNA wobble base 5-methoxycarbonylmethyl-2-thiouridinylation / tRNA wobble uridine modification / regulation of receptor signaling pathway via JAK-STAT / acetyltransferase activity / central nervous system development / transcription elongation factor complex / transcription elongation by RNA polymerase II / neuron migration / regulation of translation / HATs acetylate histones / 4 iron, 4 sulfur cluster binding / tRNA binding / positive regulation of cell migration / regulation of transcription by RNA polymerase II / protein kinase binding / nucleolus / nucleoplasm / metal ion binding / nucleus / cytoplasm / cytosol Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.35 Å | |||||||||
Authors | Abbassi N / Jaciuk M / Lin T-Y / Glatt S | |||||||||
| Funding support | European Union, 1 items
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Citation | Journal: Nat Commun / Year: 2024Title: 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
| Supplemental images |
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Downloads & links
-EMDB archive
| Map data | emd_17926.map.gz | 313.2 MB | EMDB map data format | |
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| Header (meta data) | emd-17926-v30.xml emd-17926.xml | 25 KB 25 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_17926_fsc.xml | 15.2 KB | Display | FSC data file |
| Images | emd_17926.png | 77.8 KB | ||
| Masks | emd_17926_msk_1.map | 371.3 MB | Mask map | |
| Filedesc metadata | emd-17926.cif.gz | 8.8 KB | ||
| Others | emd_17926_half_map_1.map.gz emd_17926_half_map_2.map.gz | 344.1 MB 344.1 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-17926 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-17926 | HTTPS FTP |
-Validation report
| Summary document | emd_17926_validation.pdf.gz | 1.1 MB | Display | EMDB validaton report |
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| Full document | emd_17926_full_validation.pdf.gz | 1.1 MB | Display | |
| Data in XML | emd_17926_validation.xml.gz | 24.6 KB | Display | |
| Data in CIF | emd_17926_validation.cif.gz | 32 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-17926 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-17926 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 8ptzMC ![]() 8ptxC ![]() 8ptyC ![]() 8pu0C M: atomic model generated by this map C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_17926.map.gz / Format: CCP4 / Size: 371.3 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Annotation | deepEMhancer sharpened map | ||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 0.85 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Mask #1
| File | emd_17926_msk_1.map | ||||||||||||
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| Density Histograms |
-Half map: #2
| File | emd_17926_half_map_1.map | ||||||||||||
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| Density Histograms |
-Half map: #1
| File | emd_17926_half_map_2.map | ||||||||||||
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| Density Histograms |
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Sample components
+Entire : Human Elp123 in complex with glutamine tRNA, S-ethyl-CoA, 5'-deox...
+Supramolecule #1: Human Elp123 in complex with glutamine tRNA, S-ethyl-CoA, 5'-deox...
+Macromolecule #1: Elongator complex protein 1
+Macromolecule #2: Elongator complex protein 2
+Macromolecule #3: Elongator complex protein 3
+Macromolecule #4: tRNA Gln
+Macromolecule #5: IRON/SULFUR CLUSTER
+Macromolecule #6: 5'-DEOXYADENOSINE
+Macromolecule #7: S-Ethyl-CoA
+Macromolecule #8: METHIONINE
+Macromolecule #9: MAGNESIUM ION
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Concentration | 0.6 mg/mL | |||||||||||||||
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| Buffer | pH: 7.5 Component:
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| Grid | Model: Quantifoil R2/1 / Material: COPPER / Mesh: 200 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 60 sec. / Pretreatment - Atmosphere: AIR / Details: 8 mA | |||||||||||||||
| Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV / Details: 15 s wait time, blot force 5, 5 s blot time. |
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Electron microscopy
| Microscope | TFS KRIOS |
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| Image recording | Film or detector model: FEI FALCON III (4k x 4k) / Digitization - Dimensions - Width: 4096 pixel / Digitization - Dimensions - Height: 4096 pixel / Number real images: 3192 / Average electron dose: 40.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | C2 aperture diameter: 50.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.7 µm / Nominal defocus min: 0.9 µm / Nominal magnification: 96000 |
| Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
| Initial model | Chain - Source name: Other / Chain - Initial model type: experimental model / Details: HsElp123-tRNA-ACO-5AD-MET from the same study |
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| Output model | ![]() PDB-8ptz: |
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FIELD EMISSION GUN

