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- EMDB-2324: Electron cryo-microscopy of a cross-beta amyloid fibril polymorph -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-2324 | |||||||||
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Title | Electron cryo-microscopy of a cross-beta amyloid fibril polymorph | |||||||||
![]() | Reconstruction of quadruplet cross-beta amyloid fibril polymorph | |||||||||
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Function / homology | ![]() The canonical retinoid cycle in rods (twilight vision) / Retinoid metabolism and transport / thyroid hormone metabolic process / ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() | |||||||||
Method | ![]() ![]() | |||||||||
![]() | Fitzpatrick AWP / Debelouchina GT / Bayro MJ / Clare DK / Caporini MA / Bajaj VS / Jaroniec CP / Wang L / Ladizhansky V / Muller S ...Fitzpatrick AWP / Debelouchina GT / Bayro MJ / Clare DK / Caporini MA / Bajaj VS / Jaroniec CP / Wang L / Ladizhansky V / Muller S / MacPhee CE / Waudby CA / Mott HR / De-Simone A / Knowles TPJ / Saibil HR / Vendruscolo M / Orlova EV / Griffin RG / Dobson CM | |||||||||
![]() | ![]() Title: Atomic structure and hierarchical assembly of a cross-β amyloid fibril. Authors: Anthony W P Fitzpatrick / Galia T Debelouchina / Marvin J Bayro / Daniel K Clare / Marc A Caporini / Vikram S Bajaj / Christopher P Jaroniec / Luchun Wang / Vladimir Ladizhansky / Shirley A ...Authors: Anthony W P Fitzpatrick / Galia T Debelouchina / Marvin J Bayro / Daniel K Clare / Marc A Caporini / Vikram S Bajaj / Christopher P Jaroniec / Luchun Wang / Vladimir Ladizhansky / Shirley A Müller / Cait E MacPhee / Christopher A Waudby / Helen R Mott / Alfonso De Simone / Tuomas P J Knowles / Helen R Saibil / Michele Vendruscolo / Elena V Orlova / Robert G Griffin / Christopher M Dobson / ![]() Abstract: The cross-β amyloid form of peptides and proteins represents an archetypal and widely accessible structure consisting of ordered arrays of β-sheet filaments. These complex aggregates have ...The cross-β amyloid form of peptides and proteins represents an archetypal and widely accessible structure consisting of ordered arrays of β-sheet filaments. These complex aggregates have remarkable chemical and physical properties, and the conversion of normally soluble functional forms of proteins into amyloid structures is linked to many debilitating human diseases, including several common forms of age-related dementia. Despite their importance, however, cross-β amyloid fibrils have proved to be recalcitrant to detailed structural analysis. By combining structural constraints from a series of experimental techniques spanning five orders of magnitude in length scale--including magic angle spinning nuclear magnetic resonance spectroscopy, X-ray fiber diffraction, cryoelectron microscopy, scanning transmission electron microscopy, and atomic force microscopy--we report the atomic-resolution (0.5 Å) structures of three amyloid polymorphs formed by an 11-residue peptide. These structures reveal the details of the packing interactions by which the constituent β-strands are assembled hierarchically into protofilaments, filaments, and mature fibrils. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 11.3 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 10.7 KB 10.7 KB | Display Display | ![]() |
Images | ![]() | 732.8 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 3zpkMC ![]() 2323C ![]() 5590C ![]() 2m5kC ![]() 2m5mC ![]() 2m5nC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Annotation | Reconstruction of quadruplet cross-beta amyloid fibril polymorph | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.8 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : Quadruplet cross-beta amyloid fibril polymorph
Entire | Name: Quadruplet cross-beta amyloid fibril polymorph |
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Components |
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-Supramolecule #1000: Quadruplet cross-beta amyloid fibril polymorph
Supramolecule | Name: Quadruplet cross-beta amyloid fibril polymorph / type: sample / ID: 1000 / Number unique components: 1 |
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-Macromolecule #1: Transthyretin(105-115)
Macromolecule | Name: Transthyretin(105-115) / type: protein_or_peptide / ID: 1 / Name.synonym: TTR(105-115) / Recombinant expression: No |
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Source (natural) | Organism: ![]() ![]() ![]() |
Sequence | UniProtKB: ![]() |
-Experimental details
-Structure determination
Method | ![]() |
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Aggregation state | filament |
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Sample preparation
Concentration | 1 mg/mL |
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Buffer | pH: 2 / Details: 10% acetonitrile/water solution |
Grid | Details: For cryo-EM imaging, fibrils were applied to holey carbon films (R2/2, QuantifoilMicro Tools GmbH, Jena, Germany) that were immediately plunge-frozen at liquid nitrogen temperature. |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 95 % / Chamber temperature: 99 K / Instrument: HOMEMADE PLUNGER Method: For cryo-EM imaging, fibrils were applied to holey carbon films (R2/2, QuantifoilMicro Tools GmbH, Jena, Germany) that were immediately plunge-frozen at liquid nitrogen temperature. |
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Electron microscopy
Microscope | FEI TECNAI F20 |
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Electron beam | Acceleration voltage: 200 kV / Electron source: ![]() |
Electron optics | Calibrated magnification: 40000 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD![]() |
Sample stage | Specimen holder: Nitrogen cooled / Specimen holder model: GATAN LIQUID NITROGEN |
Temperature | Min: 99 K / Max: 100 K / Average: 99 K |
Alignment procedure | Legacy - Astigmatism: Objective lens astigmatism was corrected at 100,000 times magnification. |
Date | Mar 3, 2006 |
Image recording | Category: FILM / Film or detector model: KODAK SO-163 FILM / Digitization - Scanner: ZEISS SCAI / Number real images: 250 |
Tilt angle min | 0 |
Tilt angle max | 0 |
Experimental equipment | ![]() Model: Tecnai F20 / Image courtesy: FEI Company |
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Image processing
CTF correction | Details: CTFFIND3 |
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Final two d classification | Number classes: 31 |
Final reconstruction | Applied symmetry - Point group: C1 (asymmetric) / Algorithm: OTHER / Resolution.type: BY AUTHOR / Resolution: 11.6 Å / Resolution method: FSC 0.5 CUT-OFF / Software - Name: SPIER, IMAGIC, BKRP / Number images used: 175 |
Details | The particles were selected using an automatic selection program. |