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- PDB-8v85: 60S ribosome biogenesis intermediate (Dbp10 catalytic structure -... -

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Basic information

Entry
Database: PDB / ID: 8v85
Title60S ribosome biogenesis intermediate (Dbp10 catalytic structure - Low-pass filtered locally refined map)
ComponentsATP-dependent RNA helicase DBP10
KeywordsRNA BINDING PROTEIN / RNA Binding
Function / homology
Function and homology information


maturation of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / preribosome, large subunit precursor / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / assembly of large subunit precursor of preribosome / rRNA processing / RNA helicase activity / RNA helicase / nucleolus / ATP hydrolysis activity / RNA binding ...maturation of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / preribosome, large subunit precursor / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / assembly of large subunit precursor of preribosome / rRNA processing / RNA helicase activity / RNA helicase / nucleolus / ATP hydrolysis activity / RNA binding / ATP binding / identical protein binding
Similarity search - Function
DBP10, C-terminal / DDX54/DBP10 family / DBP10CT (NUC160) domain / DBP10CT (NUC160) domain / : / DEAD-box subfamily ATP-dependent helicases signature. / RNA helicase, DEAD-box type, Q motif / ATP-dependent RNA helicase DEAD-box, conserved site / DEAD-box RNA helicase Q motif profile. / DEAD/DEAH box helicase domain ...DBP10, C-terminal / DDX54/DBP10 family / DBP10CT (NUC160) domain / DBP10CT (NUC160) domain / : / DEAD-box subfamily ATP-dependent helicases signature. / RNA helicase, DEAD-box type, Q motif / ATP-dependent RNA helicase DEAD-box, conserved site / DEAD-box RNA helicase Q motif profile. / DEAD/DEAH box helicase domain / DEAD/DEAH box helicase / Helicase conserved C-terminal domain / helicase superfamily c-terminal domain / Superfamilies 1 and 2 helicase C-terminal domain profile. / Superfamilies 1 and 2 helicase ATP-binding type-1 domain profile. / DEAD-like helicases superfamily / Helicase, C-terminal / Helicase superfamily 1/2, ATP-binding domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
ATP-dependent RNA helicase DBP10
Similarity search - Component
Biological speciesSaccharomyces cerevisiae BY4741 (yeast)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.9 Å
AuthorsCruz, V.E. / Weirich, C.S. / Peddada, N. / Erzberger, J.P.
Funding support United States, 3items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)1R01GM135617-01 United States
Robert A. Welch FoundationI-1897 United States
Cancer Prevention and Research Institute of Texas (CPRIT)RR150074 United States
CitationJournal: Nat Commun / Year: 2024
Title: The DEAD-box ATPase Dbp10/DDX54 initiates peptidyl transferase center formation during 60S ribosome biogenesis.
Authors: Victor E Cruz / Christine S Weirich / Nagesh Peddada / Jan P Erzberger /
Abstract: DEAD-box ATPases play crucial roles in guiding rRNA restructuring events during the biogenesis of large (60S) ribosomal subunits, but their precise molecular functions are currently unknown. In this ...DEAD-box ATPases play crucial roles in guiding rRNA restructuring events during the biogenesis of large (60S) ribosomal subunits, but their precise molecular functions are currently unknown. In this study, we present cryo-EM reconstructions of nucleolar pre-60S intermediates that reveal an unexpected, alternate secondary structure within the nascent peptidyl-transferase-center (PTC). Our analysis of three sequential nucleolar pre-60S intermediates reveals that the DEAD-box ATPase Dbp10/DDX54 remodels this alternate base pairing and enables the formation of the rRNA junction that anchors the mature form of the universally conserved PTC A-loop. Post-catalysis, Dbp10 captures rRNA helix H61, initiating the concerted exchange of biogenesis factors during late nucleolar 60S maturation. Our findings show that Dbp10 activity is essential for the formation of the ribosome active site and reveal how this function is integrated with subsequent assembly steps to drive the biogenesis of the large ribosomal subunit.
History
DepositionDec 4, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0May 1, 2024Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
3: ATP-dependent RNA helicase DBP10


Theoretical massNumber of molelcules
Total (without water)113,1261
Polymers113,1261
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein ATP-dependent RNA helicase DBP10


Mass: 113126.469 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Saccharomyces cerevisiae BY4741 (yeast) / References: UniProt: Q12389

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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: 60S ribosome biogenesis intermediate / Type: RIBOSOME / Entity ID: all / Source: NATURAL
Molecular weightExperimental value: NO
Source (natural)Organism: Saccharomyces cerevisiae BY4741 (yeast)
Buffer solutionpH: 8
Buffer component
IDConc.NameFormulaBuffer-ID
150 mMBis-Tris-Propane1
2125 mMSodium ChlorideNaCl1
325 mMPotassium ChlorideKCl1
410 mMMagnesium ChlorideMgCl21
SpecimenConc.: 0.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 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 FIELD / Nominal defocus max: 2200 nm / Nominal defocus min: 900 nm
Image recordingElectron dose: 39.3 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM software
IDNameVersionCategory
2SerialEMimage acquisition
7Cootmodel fitting
9PHENIX1.21rc1_5127model refinement
10RELION4initial Euler assignment
11RELION4final Euler assignment
12RELION4classification
13RELION43D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 195000
Details: High-resolution map was low pass filtered to 6A to allow domain docking
Symmetry type: POINT

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