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Open data
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Basic information
Entry | Database: PDB / ID: 6n8t | ||||||
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Title | Hsp104DWB closed conformation | ||||||
![]() | Heat shock protein 104 | ||||||
![]() | CHAPERONE / Hsp104 / ClpB / protein disaggregase / molecular chaperone / AAA+ / ATPase / cryo-EM | ||||||
Function / homology | ![]() trehalose metabolism in response to heat stress / TRC complex / cellular heat acclimation / protein folding in endoplasmic reticulum / post-translational protein targeting to endoplasmic reticulum membrane / stress granule disassembly / chaperone cofactor-dependent protein refolding / protein unfolding / nuclear periphery / ADP binding ...trehalose metabolism in response to heat stress / TRC complex / cellular heat acclimation / protein folding in endoplasmic reticulum / post-translational protein targeting to endoplasmic reticulum membrane / stress granule disassembly / chaperone cofactor-dependent protein refolding / protein unfolding / nuclear periphery / ADP binding / unfolded protein binding / protein-folding chaperone binding / cellular response to heat / protein refolding / ATP hydrolysis activity / ATP binding / identical protein binding / nucleus / cytosol / cytoplasm Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 7.7 Å | ||||||
![]() | Lee, S. / Rho, S.H. / Lee, J. / Sung, N. / Liu, J. / Tsai, F.T.F. | ||||||
![]() | ![]() Title: Cryo-EM Structures of the Hsp104 Protein Disaggregase Captured in the ATP Conformation. Authors: Sukyeong Lee / Soung Hun Roh / Jungsoon Lee / Nuri Sung / Jun Liu / Francis T F Tsai / ![]() Abstract: Hsp104 is a ring-forming, ATP-driven molecular machine that recovers functional protein from both stress-denatured and amyloid-forming aggregates. Although Hsp104 shares a common architecture with ...Hsp104 is a ring-forming, ATP-driven molecular machine that recovers functional protein from both stress-denatured and amyloid-forming aggregates. Although Hsp104 shares a common architecture with Clp/Hsp100 protein unfoldases, different and seemingly conflicting 3D structures have been reported. Examining the structure of Hsp104 poses considerable challenges because Hsp104 readily hydrolyzes ATP, whereas ATP analogs can be slowly turned over and are often contaminated with other nucleotide species. Here, we present the single-particle electron cryo-microscopy (cryo-EM) structures of a catalytically inactive Hsp104 variant (Hsp104) in the ATP-bound state determined between 7.7 Å and 9.3 Å resolution. Surprisingly, we observe that the Hsp104 hexamer adopts distinct ring conformations (closed, extended, and open) despite being in the same nucleotide state. The latter underscores the structural plasticity of Hsp104 in solution, with different conformations stabilized by nucleotide binding. Our findings suggest that, in addition to ATP hydrolysis-driven conformational changes, Hsp104 uses stochastic motions to translocate unfolded polypeptides. | ||||||
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 811.5 KB | Display | ![]() |
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PDB format | ![]() | 633.8 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 0375MC ![]() 0376C ![]() 0377C ![]() 6n8vC ![]() 6n8zC C: citing same article ( M: map data used to model this data |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
#1: Protein | Mass: 99046.859 Da / Num. of mol.: 6 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: HSP104, YLL026W, L0948 / Production host: ![]() ![]() #2: Chemical | ChemComp-ATP / |
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-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: Hexamer of Hsp104 with ATP / Type: COMPLEX / Details: Hsp 104 double Walker B mutant / Entity ID: #1 / Source: RECOMBINANT | ||||||||||||||||||||
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Molecular weight | Value: 0.6 MDa / Experimental value: YES | ||||||||||||||||||||
Source (natural) | Organism: ![]() ![]() | ||||||||||||||||||||
Source (recombinant) | Organism: ![]() ![]() | ||||||||||||||||||||
Buffer solution | pH: 7.5 / Details: Buffer solution is freshly prepared. | ||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 0.3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES / Details: This sample was mono disperse. | ||||||||||||||||||||
Specimen support | Grid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: Quantifoil R1.2/1.3 | ||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 297 K / Details: blot for 3 seconds before plunging |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Tecnai Polara / Image courtesy: FEI Company |
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Microscopy | Model: FEI POLARA 300 |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD |
Image recording | Average exposure time: 7.6 sec. / Electron dose: 38 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of real images: 1394 |
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Processing
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3D reconstruction | Resolution: 7.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 56859 / Symmetry type: POINT |