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- EMDB-10675: 1.9 A reconstruction of mouse heavy chain apoferritin -

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Basic information

Entry
Database: EMDB / ID: EMD-10675
Title1.9 A reconstruction of mouse heavy chain apoferritin
Map datasharpened masked map
Sample
  • Complex: mouse heavy chain apoferritin
    • Protein or peptide: mouse heavy chain apoferritin
Function / homology
Function and homology information


Iron uptake and transport / Golgi Associated Vesicle Biogenesis / iron ion sequestering activity / negative regulation of ferroptosis / ferroxidase / autolysosome / ferroxidase activity / intracellular sequestering of iron ion / negative regulation of fibroblast proliferation / endocytic vesicle lumen ...Iron uptake and transport / Golgi Associated Vesicle Biogenesis / iron ion sequestering activity / negative regulation of ferroptosis / ferroxidase / autolysosome / ferroxidase activity / intracellular sequestering of iron ion / negative regulation of fibroblast proliferation / endocytic vesicle lumen / autophagosome / Neutrophil degranulation / ferric iron binding / ferrous iron binding / iron ion transport / immune response / iron ion binding / negative regulation of cell population proliferation / mitochondrion / extracellular region / identical protein binding / membrane / cytosol / cytoplasm
Similarity search - Function
Ferritin iron-binding regions signature 1. / Ferritin iron-binding regions signature 2. / Ferritin, conserved site / Ferritin / Ferritin-like diiron domain / Ferritin-like diiron domain profile. / Ferritin/DPS protein domain / Ferritin-like domain / Ferritin-like / Ferritin-like superfamily
Similarity search - Domain/homology
Ferritin heavy chain
Similarity search - Component
Biological speciesMus musculus (house mouse)
Methodsingle particle reconstruction / cryo EM / Resolution: 1.86 Å
AuthorsFislage M / Shkumatov A / Stroobants A / Efremov R
Funding support Belgium, 2 items
OrganizationGrant numberCountry
Research Foundation - Flanders (FWO)G.0H59.16N Belgium
Research Foundation - Flanders (FWO)G.0266.15N Belgium
CitationJournal: IUCrJ / Year: 2020
Title: Assessing the JEOL CRYO ARM 300 for high-throughput automated single-particle cryo-EM in a multiuser environment.
Authors: Marcus Fislage / Alexander V Shkumatov / Annelore Stroobants / Rouslan G Efremov /
Abstract: Single-particle cryo-EM has become an indispensable structural biology method. It requires regular access to high-resolution electron cryogenic microscopes. To fully utilize the capacity of the ...Single-particle cryo-EM has become an indispensable structural biology method. It requires regular access to high-resolution electron cryogenic microscopes. To fully utilize the capacity of the expensive high-resolution instruments, the time used for data acquisition and the rate of data collection have to be maximized. This in turn requires high stability and high uptime of the instrument. One of the first 300 kV JEOL CRYO ARM 300 microscopes has been installed at the cryo-EM facility BECM at VIB-VUB, Brussels, where the microscope is used for continuous data collection on multiple projects. Here, the suitability and performance of the microscope is assessed for high-throughput single-particle data collection. In particular, the properties of the illumination system, the stage stability and ice contamination rates are reported. The microscope was benchmarked using mouse heavy-chain apoferritin which was reconstructed to a resolution of 1.9 Å. Finally, uptime and throughput statistics of the instrument accumulated during the first six months of the facility operation in user access mode are reported.
History
DepositionFeb 17, 2020-
Header (metadata) releaseMar 4, 2020-
Map releaseJun 24, 2020-
UpdateAug 5, 2020-
Current statusAug 5, 2020Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.03
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by radius
  • Surface level: 0.03
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_10675.png

Downloads & links

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Map

FileDownload / File: emd_10675.map.gz / Format: CCP4 / Size: 149.9 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Annotationsharpened masked map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.6 Å/pix.
x 340 pix.
= 205.02 Å		0.6 Å/pix.
x 340 pix.
= 205.02 Å		0.6 Å/pix.
x 340 pix.
= 205.02 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.603 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.03 / Movie #1: 0.03
Minimum - Maximum0 - 1
Average (Standard dev.)0.09996039 (±0.29284462)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions340340340
Spacing340340340
CellA=B=C: 205.01999 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.6030.6030.603
M x/y/z340340340
origin x/y/z0.0000.0000.000
length x/y/z205.020205.020205.020
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS340340340
D min/max/mean-0.0650.1400.000

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Supplemental data

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Mask #1

Fileemd_10675_msk_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: unfiltered half map 1

Fileemd_10675_half_map_1.map
Annotationunfiltered half map 1
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: unfiltered half map 2

Fileemd_10675_half_map_2.map
Annotationunfiltered half map 2
Projections & Slices
AxesZYX

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Histogram

Histogram (log scale)

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Sample components

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Entire : mouse heavy chain apoferritin

EntireName: mouse heavy chain apoferritin
Components
  • Complex: mouse heavy chain apoferritin
    • Protein or peptide: mouse heavy chain apoferritin

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Supramolecule #1: mouse heavy chain apoferritin

SupramoleculeName: mouse heavy chain apoferritin / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all / Details: Wilde type, octamer
Source (natural)Organism: Mus musculus (house mouse)
Recombinant expressionOrganism: Escherichia coli (E. coli)
Molecular weightTheoretical: 506 KDa

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Macromolecule #1: mouse heavy chain apoferritin

MacromoleculeName: mouse heavy chain apoferritin / type: protein_or_peptide / ID: 1 / Enantiomer: LEVO / EC number: ferroxidase
Source (natural)Organism: Mus musculus (house mouse)
Recombinant expressionOrganism: Escherichia coli BL21 (bacteria)
SequenceString:
MTTASPSQVR QNYHQDAEAA INRQINLELY ASYVYLSMSC YFDRDDVALK NFAKYFLHQS HEEREHAEK LMKLQNQRGG RIFLQDIKKP DRDDWESGLN AMECALHLEK SVNQSLLELH K LATDKNDP HLCDFIETYY LSEQVKSIKE LGDHVTNLRK MGAPEAGMAE YLFDKHTLGH GD ES

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration4 mg/mL
BufferpH: 7.5 / Details: 20 mM Hepes pH 7.5, 300 mM NaCl
GridModel: UltrAuFoil / Material: GOLD / Mesh: 300 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Atmosphere: AIR
VitrificationCryogen name: ETHANE / Chamber humidity: 98 % / Chamber temperature: 298 K / Instrument: GATAN CRYOPLUNGE 3 / Details: 4 seconds blotting.

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Electron microscopy

MicroscopeJEOL CRYO ARM 300
Alignment procedureComa free - Residual tilt: 0.3 mrad
Specialist opticsEnergy filter - Name: In-column Omega Filter / Energy filter - Slit width: 20 eV
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Number grids imaged: 1 / Average exposure time: 8.0 sec. / Average electron dose: 48.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.55 mm
Sample stageSpecimen holder model: JEOL CRYOSPECPORTER / Cooling holder cryogen: NITROGEN

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Image processing

CTF correctionSoftware - Name: CTFFIND (ver. 4)
Startup modelType of model: OTHER / Details: initial model obtained in RELION3.0
Final reconstructionNumber classes used: 1 / Applied symmetry - Point group: O (octahedral) / Algorithm: BACK PROJECTION / Resolution.type: BY AUTHOR / Resolution: 1.86 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.1) / Number images used: 89384
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.0)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.1)
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

3wnw

RefinementSpace: REAL / Protocol: OTHER / Target criteria: correlation coefficient

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