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- EMDB-17961: Structure of mouse heavy-chain apoferritin determined by cryoEM a... -

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Basic information

Entry
Database: EMDB / ID: EMD-17961
TitleStructure of mouse heavy-chain apoferritin determined by cryoEM at 100 keV
Map data
Sample
  • Complex: Mouse heavy-chain apoferritin
    • Protein or peptide: Ferritin heavy chain
  • Ligand: FE (III) ION
  • Ligand: ZINC ION
KeywordsIron storage / metal binding protein
Function / homology
Function and homology information


Iron uptake and transport / Golgi Associated Vesicle Biogenesis / iron ion sequestering activity / autolysosome / ferroxidase / ferroxidase activity / intracellular sequestering of iron ion / negative regulation of fibroblast proliferation / endocytic vesicle lumen / Neutrophil degranulation ...Iron uptake and transport / Golgi Associated Vesicle Biogenesis / iron ion sequestering activity / autolysosome / ferroxidase / ferroxidase activity / intracellular sequestering of iron ion / negative regulation of fibroblast proliferation / endocytic vesicle lumen / 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 / 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: 2.6 Å
AuthorsMcMullan G / Naydenova K / Mihaylov D / Peet MJ / Wilson H / Yamashita K / Dickerson JL / Chen S / Cannone G / Lee Y ...McMullan G / Naydenova K / Mihaylov D / Peet MJ / Wilson H / Yamashita K / Dickerson JL / Chen S / Cannone G / Lee Y / Hutchings KA / Gittins O / Sobhy M / Wells T / El-Gomati MM / Dalby J / Meffert M / Schulze-Briese C / Henderson R / Russo CJ
Funding support United Kingdom, 6 items
OrganizationGrant numberCountry
Medical Research Council (MRC, United Kingdom)MC UP 120117 United Kingdom
Medical Research Council (MRC, United Kingdom)MC U105184322 United Kingdom
Wellcome Trust220526/B/20/Z United Kingdom
Engineering and Physical Sciences Research CouncilR122522 United Kingdom
Innovate UK103806 United Kingdom
Biotechnology and Biological Sciences Research Council (BBSRC)BB/T003677/1 United Kingdom
CitationJournal: Proc Natl Acad Sci U S A / Year: 2023
Title: Structure determination by cryoEM at 100 keV.
Authors: Greg McMullan / Katerina Naydenova / Daniel Mihaylov / Keitaro Yamashita / Mathew J Peet / Hugh Wilson / Joshua L Dickerson / Shaoxia Chen / Giuseppe Cannone / Yang Lee / Katherine A ...Authors: Greg McMullan / Katerina Naydenova / Daniel Mihaylov / Keitaro Yamashita / Mathew J Peet / Hugh Wilson / Joshua L Dickerson / Shaoxia Chen / Giuseppe Cannone / Yang Lee / Katherine A Hutchings / Olivia Gittins / Mohamed A Sobhy / Torquil Wells / Mohamed M El-Gomati / Jason Dalby / Matthias Meffert / Clemens Schulze-Briese / Richard Henderson / Christopher J Russo /
Abstract: Electron cryomicroscopy can, in principle, determine the structures of most biological molecules but is currently limited by access, specimen preparation difficulties, and cost. We describe a purpose- ...Electron cryomicroscopy can, in principle, determine the structures of most biological molecules but is currently limited by access, specimen preparation difficulties, and cost. We describe a purpose-built instrument operating at 100 keV-including advances in electron optics, detection, and processing-that makes structure determination fast and simple at a fraction of current costs. The instrument attains its theoretical performance limits, allowing atomic resolution imaging of gold test specimens and biological molecular structure determination in hours. We demonstrate its capabilities by determining the structures of eleven different specimens, ranging in size from 140 kDa to 2 MDa, using a fraction of the data normally required. CryoEM with a microscope designed specifically for high-efficiency, on-the-spot imaging of biological molecules will expand structural biology to a wide range of previously intractable problems.
History
DepositionJul 17, 2023-
Header (metadata) releaseNov 29, 2023-
Map releaseNov 29, 2023-
UpdateDec 6, 2023-
Current statusDec 6, 2023Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_17961.png

Downloads & links

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Map

FileDownload / File: emd_17961.map.gz / Format: CCP4 / Size: 137.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 0.838 Å
Density
Contour LevelBy AUTHOR: 0.04
Minimum - Maximum-0.082253866 - 0.1548449
Average (Standard dev.)0.00026683087 (±0.0069038575)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions330330330
Spacing330330330
CellA=B=C: 276.54 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_17961_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_17961_half_map_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_17961_half_map_2.map
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: Ferritin heavy chain
  • Ligand: FE (III) ION
  • Ligand: ZINC ION

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Supramolecule #1: Mouse heavy-chain apoferritin

SupramoleculeName: Mouse heavy-chain apoferritin / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Mus musculus (house mouse)

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Macromolecule #1: Ferritin heavy chain

MacromoleculeName: Ferritin heavy chain / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: ferroxidase
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 21.097631 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString:
MTTASPSQVR QNYHQDAEAA INRQINLELY ASYVYLSMSC YFDRDDVALK NFAKYFLHQS HEEREHAEKL MKLQNQRGGR IFLQDIKKP DRDDWESGLN AMECALHLEK SVNQSLLELH KLATDKNDPH LCDFIETYYL SEQVKSIKEL GDHVTNLRKM G APEAGMAE YLFDKHTLGH GDES

UniProtKB: Ferritin heavy chain

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Macromolecule #2: FE (III) ION

MacromoleculeName: FE (III) ION / type: ligand / ID: 2 / Number of copies: 1 / Formula: FE
Molecular weightTheoretical: 55.845 Da

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Macromolecule #3: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 3 / Number of copies: 1 / Formula: ZN
Molecular weightTheoretical: 65.409 Da

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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

BufferpH: 7.5
GridModel: UltrAuFoil R1.2/1.3 / Material: GOLD / Mesh: 300
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeJEOL 1400/HR + YPS FEG
Electron beamAcceleration voltage: 100 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2.0 µm / Nominal defocus min: 0.5 µm
Sample stageSpecimen holder model: GATAN 626 SINGLE TILT LIQUID NITROGEN CRYO TRANSFER HOLDER
Cooling holder cryogen: NITROGEN
Image recordingFilm or detector model: DECTRIS SINGLA (1k x 1k) / Digitization - Dimensions - Width: 1030 pixel / Digitization - Dimensions - Height: 1066 pixel / Average electron dose: 80.0 e/Å2

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Image processing

Startup modelType of model: EMDB MAP
EMDB ID:

13256

Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
Final reconstructionApplied symmetry - Point group: O (octahedral) / Resolution.type: BY AUTHOR / Resolution: 2.6 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 26745
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

7a4m


Chain - Source name: PDB / Chain - Initial model type: experimental model
RefinementSpace: RECIPROCAL
Output model

PDB-8pvc:
Structure of mouse heavy-chain apoferritin determined by cryoEM at 100 keV

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