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Open data
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Basic information
Entry | Database: PDB / ID: 5jzw | ||||||
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Title | Cryo-EM structures of aerolysin post-prepore and quasipore | ||||||
![]() | Aerolysin | ||||||
![]() | TOXIN / pore forming toxin / concentric beta-barrel / aerolysin | ||||||
Function / homology | ![]() toxin activity / host cell plasma membrane / extracellular region / identical protein binding / membrane Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.46 Å | ||||||
![]() | Iacovache, I. / Zuber, B. | ||||||
![]() | ![]() Title: Cryo-EM structure of aerolysin variants reveals a novel protein fold and the pore-formation process. Authors: Ioan Iacovache / Sacha De Carlo / Nuria Cirauqui / Matteo Dal Peraro / F Gisou van der Goot / Benoît Zuber / ![]() ![]() ![]() Abstract: Owing to their pathogenical role and unique ability to exist both as soluble proteins and transmembrane complexes, pore-forming toxins (PFTs) have been a focus of microbiologists and structural ...Owing to their pathogenical role and unique ability to exist both as soluble proteins and transmembrane complexes, pore-forming toxins (PFTs) have been a focus of microbiologists and structural biologists for decades. PFTs are generally secreted as water-soluble monomers and subsequently bind the membrane of target cells. Then, they assemble into circular oligomers, which undergo conformational changes that allow membrane insertion leading to pore formation and potentially cell death. Aerolysin, produced by the human pathogen Aeromonas hydrophila, is the founding member of a major PFT family found throughout all kingdoms of life. We report cryo-electron microscopy structures of three conformational intermediates and of the final aerolysin pore, jointly providing insight into the conformational changes that allow pore formation. Moreover, the structures reveal a protein fold consisting of two concentric β-barrels, tightly kept together by hydrophobic interactions. This fold suggests a basis for the prion-like ultrastability of aerolysin pore and its stoichiometry. | ||||||
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 | ![]() | 1.7 MB | Display | ![]() |
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PDB format | ![]() | 1.4 MB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 8188MC ![]() 8185C ![]() 8187C ![]() 5jzhC ![]() 5jztC 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
#1: Protein | Mass: 47133.145 Da / Num. of mol.: 14 / Mutation: K246C, E258C Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
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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: aerolysin post-prepore and quasipore / Type: COMPLEX Details: Aerolysin oligomer arrested in post-prepore and quasipore states by the K246C/E258C mutation. Entity ID: #1-#2 / Source: RECOMBINANT |
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Molecular weight | Value: 0.35 MDa / Experimental value: NO |
Source (natural) | Organism: ![]() |
Source (recombinant) | Organism: ![]() ![]() |
Buffer solution | pH: 7.4 |
Specimen | Conc.: 0.4 mg/ml / 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 R2/1 |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 70 % / Chamber temperature: 295 K Details: 30 seconds glow discharged grids, 4ul sample, 5 seconds blot |
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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 | Average exposure time: 1 sec. / Electron dose: 22.42 e/Å2 / Detector mode: INTEGRATING / Film or detector model: FEI FALCON II (4k x 4k) |
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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: 260958 | ||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 4.46 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 70766 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||
Atomic model building | Protocol: FLEXIBLE FIT | ||||||||||||||||||||||||||||||||||||||||
Atomic model building | PDB-ID: 3C0N Pdb chain-ID: B |