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Open data
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Basic information
Entry | Database: PDB / ID: 6d6q | |||||||||
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Title | Human nuclear exosome-MTR4 RNA complex - overall reconstruction | |||||||||
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Function / homology | ![]() DNA deamination / nucleolar exosome (RNase complex) / snRNA catabolic process / nuclear polyadenylation-dependent antisense transcript catabolic process / nuclear polyadenylation-dependent snoRNA catabolic process / nuclear polyadenylation-dependent snRNA catabolic process / ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | |||||||||
Biological species | ![]() ![]() synthetic construct (others) | |||||||||
Method | ![]() ![]() ![]() | |||||||||
![]() | Weick, E.-M. / Lima, C.D. | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Helicase-Dependent RNA Decay Illuminated by a Cryo-EM Structure of a Human Nuclear RNA Exosome-MTR4 Complex. Authors: Eva-Maria Weick / M Rhyan Puno / Kurt Januszyk / John C Zinder / Michael A DiMattia / Christopher D Lima / ![]() Abstract: The ribonucleolytic RNA exosome interacts with RNA helicases to degrade RNA. To understand how the 3' to 5' Mtr4 helicase engages RNA and the nuclear exosome, we reconstituted 14-subunit Mtr4- ...The ribonucleolytic RNA exosome interacts with RNA helicases to degrade RNA. To understand how the 3' to 5' Mtr4 helicase engages RNA and the nuclear exosome, we reconstituted 14-subunit Mtr4-containing RNA exosomes from Saccharomyces cerevisiae, Schizosaccharomyces pombe, and human and show that they unwind structured substrates to promote degradation. We loaded a human exosome with an optimized DNA-RNA chimera that stalls MTR4 during unwinding and determined its structure to an overall resolution of 3.45 Å by cryoelectron microscopy (cryo-EM). The structure reveals an RNA-engaged helicase atop the non-catalytic core, with RNA captured within the central channel and DIS3 exoribonuclease active site. MPP6 tethers MTR4 to the exosome through contacts to the RecA domains of MTR4. EXOSC10 remains bound to the core, but its catalytic module and cofactor C1D are displaced by RNA-engaged MTR4. Competition for the exosome core may ensure that RNA is committed to degradation by DIS3 when engaged by MTR4. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 744.7 KB | Display | ![]() |
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PDB format | ![]() | 590.5 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 958 KB | Display | ![]() |
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Full document | ![]() | 1006.9 KB | Display | |
Data in XML | ![]() | 111.4 KB | Display | |
Data in CIF | ![]() | 174.7 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7808MC ![]() 7809C ![]() 7810C ![]() 7812C ![]() 7813C ![]() 7814C ![]() 7815C ![]() 7818C ![]() 7819C ![]() 6d6rC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Exosome complex component ... , 9 types, 9 molecules ABCDEFGHI
#1: Protein | ![]() Mass: 52828.020 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() |
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#2: Protein | ![]() Mass: 26831.473 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() |
#3: Protein | ![]() Mass: 30285.762 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() |
#4: Protein | ![]() Mass: 25480.213 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() |
#5: Protein | ![]() Mass: 32072.633 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() |
#6: Protein | ![]() Mass: 28267.127 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() |
#7: Protein | ![]() Mass: 29796.371 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() |
#8: Protein | ![]() Mass: 33184.371 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() |
#9: Protein | ![]() Mass: 21690.971 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() |
-Protein , 4 types, 4 molecules JKLM
#10: Protein | ![]() Mass: 86754.859 Da / Num. of mol.: 1 / Mutation: D313N Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() References: UniProt: Q01780, ![]() |
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#11: Protein | Mass: 109267.930 Da / Num. of mol.: 1 / Mutation: D146N, D487N Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() References: UniProt: Q9Y2L1, ![]() ![]() |
#12: Protein | Mass: 19267.961 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() |
#13: Protein | Mass: 118224.961 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
-RNA chain / DNA/RNA hybrid , 2 types, 2 molecules NO
#14: RNA chain | Mass: 5143.175 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) |
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#15: DNA/RNA hybrid | Mass: 19487.074 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others) |
-Non-polymers , 3 types, 3 molecules 




#16: Chemical | ChemComp-MG / |
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#17: Chemical | ChemComp-ZN / |
#18: Chemical | ChemComp-ANP / |
-Experimental details
-Experiment
Experiment | Method: ![]() |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: ![]() |
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Sample preparation
Component | Name: Human nuclear exosome-MTR4 helicase captured after unwinding a DNA/RNA substrate Type: COMPLEX Details: Human C1D/Rrp47 also in the sample, but was not observed in density Entity ID: #1-#15 / Source: RECOMBINANT | |||||||||||||||||||||||||||||||||||
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Molecular weight | Value: 0.69 MDa / Experimental value: NO | |||||||||||||||||||||||||||||||||||
Source (natural) | Organism: ![]() ![]() | |||||||||||||||||||||||||||||||||||
Source (recombinant) | Organism: ![]() ![]() ![]() | |||||||||||||||||||||||||||||||||||
Buffer solution | pH: 8 | |||||||||||||||||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 1 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied![]() ![]() Details: Sample was monodisperse upon elution from gel filtration prior to vitrification. | |||||||||||||||||||||||||||||||||||
Specimen support | Grid material: GOLD / Grid type: Quantifoil R2/2 | |||||||||||||||||||||||||||||||||||
Vitrification![]() | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Chamber temperature: 298 K / Details: 30 sec wait time, 2.5 sec blot time |
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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![]() |
Image recording | Electron dose: 85.23 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of real images: 1439 |
Image scans | Movie frames/image: 50 |
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Processing
EM software |
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CTF correction![]() | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 278185 | ||||||||||||||||||||||||||||||||||||||||||||||||||
3D reconstruction![]() | Resolution: 3.45 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 122703 Details: Focused refinements with five strategies required to achieve final model Num. of class averages: 1 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||||||||||||
Atomic model building | B value: 73.6 / Protocol: BACKBONE TRACE / Space: REAL / Target criteria: Correlation coefficient Details: Models were rebuilt manually using Coot, with real space refinement with local scaling followed by Phenix real space refinement with suboptimal global scaling. |