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- PDB-8a0e: CryoEM structure of DHS-eIF5A1 complex -

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Basic information

Entry
Database: PDB / ID: 8a0e
TitleCryoEM structure of DHS-eIF5A1 complex
Components
  • (Deoxyhypusine synthase) x 2
  • Eukaryotic translation initiation factor 5A
KeywordsTRANSFERASE / Hypusination / posttranslational modification
Function / homology
Function and homology information


deoxyhypusine synthase / deoxyhypusine synthase activity / Hypusine synthesis from eIF5A-lysine / peptidyl-lysine modification to peptidyl-hypusine / spermidine metabolic process / spermidine catabolic process / positive regulation of translational termination / positive regulation of translational elongation / translation elongation factor activity / positive regulation of T cell proliferation ...deoxyhypusine synthase / deoxyhypusine synthase activity / Hypusine synthesis from eIF5A-lysine / peptidyl-lysine modification to peptidyl-hypusine / spermidine metabolic process / spermidine catabolic process / positive regulation of translational termination / positive regulation of translational elongation / translation elongation factor activity / positive regulation of T cell proliferation / translation initiation factor activity / ribosome binding / glucose homeostasis / translation / positive regulation of cell population proliferation / endoplasmic reticulum membrane / RNA binding / identical protein binding / cytosol / cytoplasm
Similarity search - Function
Deoxyhypusine synthase / Deoxyhypusine synthase superfamily / Deoxyhypusine synthase / Translation elongation factor, IF5A, hypusine site / Eukaryotic initiation factor 5A hypusine signature. / Eukaryotic elongation factor 5A hypusine, DNA-binding OB fold / Translation elongation factor IF5A-like / Translation elongation factor, IF5A C-terminal / Eukaryotic elongation factor 5A hypusine, DNA-binding OB fold / DHS-like NAD/FAD-binding domain superfamily ...Deoxyhypusine synthase / Deoxyhypusine synthase superfamily / Deoxyhypusine synthase / Translation elongation factor, IF5A, hypusine site / Eukaryotic initiation factor 5A hypusine signature. / Eukaryotic elongation factor 5A hypusine, DNA-binding OB fold / Translation elongation factor IF5A-like / Translation elongation factor, IF5A C-terminal / Eukaryotic elongation factor 5A hypusine, DNA-binding OB fold / DHS-like NAD/FAD-binding domain superfamily / Translation protein SH3-like domain superfamily / Ribosomal protein L2, domain 2 / Nucleic acid-binding, OB-fold
Similarity search - Domain/homology
NICOTINAMIDE-ADENINE-DINUCLEOTIDE / SPERMIDINE / Eukaryotic translation initiation factor 5A / Deoxyhypusine synthase
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.8 Å
AuthorsWator, E. / Wilk, P. / Biela, A.P. / Rawski, M. / Grudnik, P.
Funding support Poland, 2items
OrganizationGrant numberCountry
Polish National Science CentreUMO-2019/33/B/NZ1/01839 Poland
Foundation for Polish ScienceTEAM TECH CORE FACILITY/2017-4/6 Poland
CitationJournal: Nat Commun / Year: 2023
Title: Cryo-EM structure of human eIF5A-DHS complex reveals the molecular basis of hypusination-associated neurodegenerative disorders.
Authors: Elżbieta Wątor / Piotr Wilk / Artur Biela / Michał Rawski / Krzysztof M Zak / Wieland Steinchen / Gert Bange / Sebastian Glatt / Przemysław Grudnik /
Abstract: Hypusination is a unique post-translational modification of the eukaryotic translation factor 5A (eIF5A) that is essential for overcoming ribosome stalling at polyproline sequence stretches. The ...Hypusination is a unique post-translational modification of the eukaryotic translation factor 5A (eIF5A) that is essential for overcoming ribosome stalling at polyproline sequence stretches. The initial step of hypusination, the formation of deoxyhypusine, is catalyzed by deoxyhypusine synthase (DHS), however, the molecular details of the DHS-mediated reaction remained elusive. Recently, patient-derived variants of DHS and eIF5A have been linked to rare neurodevelopmental disorders. Here, we present the cryo-EM structure of the human eIF5A-DHS complex at 2.8 Å resolution and a crystal structure of DHS trapped in the key reaction transition state. Furthermore, we show that disease-associated DHS variants influence the complex formation and hypusination efficiency. Hence, our work dissects the molecular details of the deoxyhypusine synthesis reaction and reveals how clinically-relevant mutations affect this crucial cellular process.
History
DepositionMay 27, 2022Deposition site: PDBE / Processing site: PDBE
Revision 1.0Apr 5, 2023Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Deoxyhypusine synthase
B: Deoxyhypusine synthase
C: Deoxyhypusine synthase
D: Deoxyhypusine synthase
E: Eukaryotic translation initiation factor 5A
hetero molecules


Theoretical massNumber of molelcules
Total (without water)184,54612
Polymers181,4565
Non-polymers3,0897
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein Deoxyhypusine synthase / / DHS


Mass: 41098.461 Da / Num. of mol.: 2 / Mutation: K329A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: DHPS, DS / Production host: Escherichia coli (E. coli) / References: UniProt: P49366, deoxyhypusine synthase
#2: Protein Deoxyhypusine synthase / / DHS


Mass: 41130.527 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: DHPS, DS / Production host: Escherichia coli (E. coli) / References: UniProt: P49366, deoxyhypusine synthase
#3: Protein Eukaryotic translation initiation factor 5A / eIF-5A


Mass: 16998.395 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: EIF5A / Production host: Escherichia coli (E. coli) / References: UniProt: A0A2Y9EFS4
#4: Chemical
ChemComp-NAD / NICOTINAMIDE-ADENINE-DINUCLEOTIDE / Nicotinamide adenine dinucleotide


Mass: 663.425 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C21H27N7O14P2 / Comment: NAD*YM
#5: Chemical ChemComp-SPD / SPERMIDINE / N-(2-AMINO-PROPYL)-1,4-DIAMINOBUTANE / PA(34) / Spermidine


Mass: 145.246 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: C7H19N3
Has ligand of interestN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Complex of human DHS-eIF5A / Type: COMPLEX / Details: monomer of eIF5A bound to homotetramer DHS. / Entity ID: #1-#3 / Source: RECOMBINANT
Molecular weightValue: 0.181687 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 9.3
Buffer component
IDConc.NameFormulaBuffer-ID
10.2 Mglycine bufferNaOH/Glycine1
20.2 Msodium chlorideNaClSodium chloride1
SpecimenConc.: 0.12 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: Quantifoil R2/2
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 278 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 3500 nm / Nominal defocus min: 500 nm / Cs: 2.7 mm
Specimen holderCryogen: NITROGEN
Image recordingElectron dose: 40 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM software
IDNameCategory
1Warpparticle selection
2EPUimage acquisition
4WarpCTF correction
7UCSF Chimeramodel fitting
9cryoSPARCinitial Euler assignment
10cryoSPARCfinal Euler assignment
11cryoSPARCclassification
13PHENIXmodel refinement
Image processingDetails: selected images were normalized and low-pass filtered
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 1277576 / Details: autopicked particles
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 2.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 490582 / Algorithm: FOURIER SPACE / Num. of class averages: 1 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL
Atomic model buildingPDB-ID: 6XXJ

6xxj

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