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Open data
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Basic information
Entry | Database: PDB / ID: 8rdy | ||||||
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Title | Saccharomyces cerevisiae Prp43 helicase in complex with Pxr1 | ||||||
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![]() | RNA BINDING PROTEIN / preribosome / helicase / ribosome assembly / inhibitor | ||||||
Function / homology | ![]() spliceosomal complex disassembly / telomerase inhibitor activity / post-mRNA release spliceosomal complex / box C/D sno(s)RNA 3'-end processing / maturation of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / negative regulation of telomere maintenance via telomerase / glutathione transferase / glutathione transferase activity / 90S preribosome / glutathione metabolic process ...spliceosomal complex disassembly / telomerase inhibitor activity / post-mRNA release spliceosomal complex / box C/D sno(s)RNA 3'-end processing / maturation of 5.8S rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / negative regulation of telomere maintenance via telomerase / glutathione transferase / glutathione transferase activity / 90S preribosome / glutathione metabolic process / enzyme activator activity / maturation of LSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / ribosomal large subunit biogenesis / maturation of SSU-rRNA from tricistronic rRNA transcript (SSU-rRNA, 5.8S rRNA, LSU-rRNA) / maturation of SSU-rRNA / helicase activity / small-subunit processome / spliceosomal complex / rRNA processing / nucleic acid binding / RNA helicase activity / RNA helicase / mRNA binding / nucleolus / ATP hydrolysis activity / mitochondrion / RNA binding / nucleoplasm / ATP binding Similarity search - Function | ||||||
Biological species | ![]() ![]() ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.33 Å | ||||||
![]() | Rabl, J. / Portugal Calisto, D. / Panse, V.G. | ||||||
Funding support | ![]()
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![]() | ![]() Title: An inhibitory segment within G-patch activators tunes Prp43-ATPase activity during ribosome assembly. Authors: Daniela Portugal-Calisto / Alexander Gregor Geiger / Julius Rabl / Oscar Vadas / Michaela Oborská-Oplová / Jarosław Mazur / Federica Richina / Purnima Klingauf-Nerurkar / Erich Michel / ...Authors: Daniela Portugal-Calisto / Alexander Gregor Geiger / Julius Rabl / Oscar Vadas / Michaela Oborská-Oplová / Jarosław Mazur / Federica Richina / Purnima Klingauf-Nerurkar / Erich Michel / Alexander Leitner / Daniel Boehringer / Vikram Govind Panse / ![]() Abstract: Mechanisms by which G-patch activators tune the processive multi-tasking ATP-dependent RNA helicase Prp43 (DHX15 in humans) to productively remodel diverse RNA:protein complexes remain elusive. Here, ...Mechanisms by which G-patch activators tune the processive multi-tasking ATP-dependent RNA helicase Prp43 (DHX15 in humans) to productively remodel diverse RNA:protein complexes remain elusive. Here, a comparative study between a herein and previously characterized activators, Tma23 and Pxr1, respectively, defines segments that organize Prp43 function during ribosome assembly. In addition to the activating G-patch, we discover an inhibitory segment within Tma23 and Pxr1, I-patch, that restrains Prp43 ATPase activity. Cryo-electron microscopy and hydrogen-deuterium exchange mass spectrometry show how I-patch binds to the catalytic RecA-like domains to allosterically inhibit Prp43 ATPase activity. Tma23 and Pxr1 contain dimerization segments that organize Prp43 into higher-order complexes. We posit that Prp43 function at discrete locations on pre-ribosomal RNA is coordinated through toggling interactions with G-patch and I-patch segments. This could guarantee measured and timely Prp43 activation, enabling precise control over multiple RNA remodelling events occurring concurrently during ribosome formation. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 284.3 KB | Display | ![]() |
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PDB format | ![]() | 221.6 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 19078MC 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
#1: Protein | Mass: 91728.195 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Gene: PRP43 / Production host: ![]() ![]() |
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#2: Protein | Mass: 42265.660 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() Gene: PXR1, GNO1, YGR280C / Production host: ![]() ![]() |
#3: Chemical | ChemComp-ADP / |
#4: Chemical | ChemComp-MG / |
Has ligand of interest | Y |
Has protein modification | N |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: Saccharomyces cerevisiae Prp43-Pxr1 complex / Type: COMPLEX Details: Recombinantly expressed helicase Prp43 in complex with Pxr1 regulatory protein Entity ID: #1-#2 / Source: RECOMBINANT |
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Molecular weight | Units: MEGADALTONS / Experimental value: NO |
Source (natural) | Organism: ![]() ![]() |
Source (recombinant) | Organism: ![]() ![]() |
Buffer solution | pH: 7.5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Grid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3 |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE-PROPANE / Humidity: 95 % / Chamber temperature: 277 K |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 500 nm / Alignment procedure: COMA FREE |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Electron dose: 80 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
EM imaging optics | Energyfilter slit width: 20 eV |
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Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.33 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 258878 / Symmetry type: POINT | |||||||||||||||||||||||||||
Atomic model building | Protocol: AB INITIO MODEL / Space: REAL | |||||||||||||||||||||||||||
Atomic model building | Source name: AlphaFold / Type: in silico model | |||||||||||||||||||||||||||
Refine LS restraints |
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