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- PDB-6hyp: Rea1 Wild type ADP state (AAA+ ring part) -

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Basic information

Entry
Database: PDB / ID: 6hyp
TitleRea1 Wild type ADP state (AAA+ ring part)
ComponentsMidasin,Midasin
KeywordsMOTOR PROTEIN / Rea1 / Mdn1 / Midasin / AAA+ protein / ribosome maturation / molecular machine
Function / homology
Function and homology information


protein-RNA complex remodeling / regulation of ribosomal subunit export from nucleus / preribosome, large subunit precursor / ribosomal large subunit export from nucleus / rRNA processing / ribosomal large subunit assembly / nucleolus / ATP hydrolysis activity / mitochondrion / nucleoplasm ...protein-RNA complex remodeling / regulation of ribosomal subunit export from nucleus / preribosome, large subunit precursor / ribosomal large subunit export from nucleus / rRNA processing / ribosomal large subunit assembly / nucleolus / ATP hydrolysis activity / mitochondrion / nucleoplasm / ATP binding / nucleus
Similarity search - Function
Midasin / Midasin, AAA lid domain 7 / Midasin AAA lid domain 5 / : / Midasin AAA lid domain / Midasin AAA lid domain / Midasin AAA+ ATPase lid domain / ATPase, dynein-related, AAA domain / AAA domain (dynein-related subfamily) / Sigma-54 interaction domain, ATP-binding site 1 ...Midasin / Midasin, AAA lid domain 7 / Midasin AAA lid domain 5 / : / Midasin AAA lid domain / Midasin AAA lid domain / Midasin AAA+ ATPase lid domain / ATPase, dynein-related, AAA domain / AAA domain (dynein-related subfamily) / Sigma-54 interaction domain, ATP-binding site 1 / VWFA domain profile. / von Willebrand factor, type A / von Willebrand factor A-like domain superfamily / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
ADENOSINE-5'-DIPHOSPHATE / Midasin
Similarity search - Component
Biological speciesSaccharomyces cerevisiae (brewer's yeast)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.4 Å
AuthorsSosnowski, P. / Urnavicius, L. / Boland, A. / Fagiewicz, R. / Busselez, J. / Papai, G. / Schmidt, H.
Funding support France, 1items
OrganizationGrant numberCountry
French National Research AgencyATIP-Avenir France
CitationJournal: Elife / Year: 2018
Title: The CryoEM structure of the ribosome maturation factor Rea1.
Authors: Piotr Sosnowski / Linas Urnavicius / Andreas Boland / Robert Fagiewicz / Johan Busselez / Gabor Papai / Helgo Schmidt /
Abstract: The biogenesis of 60S ribosomal subunits is initiated in the nucleus where rRNAs and proteins form pre-60S particles. These pre-60S particles mature by transiently interacting with various assembly ...The biogenesis of 60S ribosomal subunits is initiated in the nucleus where rRNAs and proteins form pre-60S particles. These pre-60S particles mature by transiently interacting with various assembly factors. The ~5000 amino-acid AAA+ ATPase Rea1 (or Midasin) generates force to mechanically remove assembly factors from pre-60S particles, which promotes their export to the cytosol. Here we present three Rea1 cryoEM structures. We visualise the Rea1 engine, a hexameric ring of AAA+ domains, and identify an α-helical bundle of AAA2 as a major ATPase activity regulator. The α-helical bundle interferes with nucleotide-induced conformational changes that create a docking site for the substrate binding MIDAS domain on the AAA +ring. Furthermore, we reveal the architecture of the Rea1 linker, which is involved in force generation and extends from the AAA+ ring. The data presented here provide insights into the mechanism of one of the most complex ribosome maturation factors.
History
DepositionOct 22, 2018Deposition site: PDBE / Processing site: PDBE
Revision 1.0Dec 12, 2018Provider: repository / Type: Initial release
Revision 1.0Dec 12, 2018Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Dec 12, 2018Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Dec 12, 2018Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Dec 12, 2018Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Dec 12, 2018Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Dec 12, 2018Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Dec 12, 2018Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Dec 12, 2018Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Dec 12, 2018Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Dec 12, 2018Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Dec 12, 2018Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Dec 12, 2018Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Dec 12, 2018Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Dec 12, 2018Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Dec 12, 2018Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Dec 12, 2018Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Dec 19, 2018Group: Data collection / Database references / Category: citation / Item: _citation.title
Revision 1.2Dec 18, 2019Group: Other / Category: atom_sites / cell
Item: _atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] ..._atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] / _atom_sites.fract_transf_matrix[3][3] / _cell.Z_PDB
Revision 1.3Sep 30, 2020Group: Database references / Category: citation / Item: _citation.title
Revision 1.4May 15, 2024Group: Data collection / Database references / Category: chem_comp_atom / chem_comp_bond / database_2
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession
Revision 1.5Jul 2, 2025Group: Data collection / Structure summary / Category: em_admin / em_software / pdbx_entry_details / Item: _em_admin.last_update / _em_software.name
Revision 1.1Jul 2, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data processing / Experimental summary / Data content type: EM metadata / EM metadata / Category: em_admin / em_software / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_software.name

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Structure visualization

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Assembly

Deposited unit
A: Midasin,Midasin
hetero molecules


Theoretical massNumber of molelcules
Total (without water)549,4863
Polymers548,6311
Non-polymers8542
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: mass spectrometry
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area1260 Å2
ΔGint-10 kcal/mol
Surface area135520 Å2
MethodPISA

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Components

#1: Protein Midasin,Midasin / Dynein-related AAA-ATPase REA1 / MIDAS-containing protein / Ribosome export/assembly protein 1


Mass: 548631.312 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae (brewer's yeast)
Gene: MDN1, REA1, YLR106C, L2901, L8004.13 / Production host: Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: Q12019
#2: Chemical ChemComp-ADP / ADENOSINE-5'-DIPHOSPHATE


Mass: 427.201 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C10H15N5O10P2 / Comment: ADP, energy-carrying molecule*YM
Has protein modificationN

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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: Rea1 (MIDASIN) ring with ADP / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)
Source (recombinant)Organism: Saccharomyces cerevisiae (brewer's yeast)
Buffer solutionpH: 7.2 / Details: ADP was added 5 minute before the plunging
Buffer component
IDConc.NameFormulaBuffer-ID
1150 mMHEPESC8H18N2O4S1
210 mMMagnesium AcetateMg(CH3COO)21
35 mMEGTAC14H24N2O101
45 mMDTTC4H10O2S21
53 mMADPC10H15N5O10P21
SpecimenConc.: 1 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: HOMEMADE PLUNGER / Cryogen name: ETHANE

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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 FIELD / Nominal magnification: 105000 X / Calibrated magnification: 105000 X / Nominal defocus max: 3400 nm / Nominal defocus min: 1800 nm / Cs: 0.01 mm / Alignment procedure: ZEMLIN TABLEAU
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Residual tilt: 12 mradians
Image recordingAverage exposure time: 0.2 sec. / Electron dose: 46.2 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 14 / Num. of real images: 23230
EM imaging opticsEnergyfilter name: GIF Quantum LS / Energyfilter slit width: 20 eV / Spherical aberration corrector: Titan Krios Cs Corrector
Image scansSampling size: 5 µm / Width: 3712 / Height: 3840 / Movie frames/image: 35 / Used frames/image: 2-35

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Processing

SoftwareName: PHENIX / Version: 1.13_2998: / Classification: refinement
EM software
IDNameVersionCategory
2SerialEMimage acquisition
4GctfCTF correction
5RELIONCTF correction
10PHENIXmodel refinement
11RELION2.1initial Euler assignment
12RELIONfinal Euler assignment
13RELIONclassification
14RELION3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 4.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 76071 / Symmetry type: POINT
RefinementHighest resolution: 4.4 Å
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0026369
ELECTRON MICROSCOPYf_angle_d0.6518793
ELECTRON MICROSCOPYf_dihedral_angle_d5.0493745
ELECTRON MICROSCOPYf_chiral_restr0.0451135
ELECTRON MICROSCOPYf_plane_restr0.0051177

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