7a4m

Cryo-EM structure of mouse heavy-chain apoferritin at 1.22 A

Method: ELECTRON MICROSCOPY Dmax: 68.0 Å Quality: REASONABLE

1. Protein Identity and Related Structures Protein Identity & Related Structures

Ferritin heavy chain

Mus musculus

UniProt P09528

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein homooligomer Homooligomer Protein × 24 PDB declaration: 24-meric(24) Consistent with protein copy count Chain A; UniProt 6–177 Not recorded FE FE (III) ION × 24 ZN ZINC ION × 24 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.5;20mM HEPES pH 7.5 150mM NaCl cryo-EM vitrification conditions:Cryogen ETHANE Resolution 1.22 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

26 other PDB entries and 28 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name FRIH_MOUSE
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–172; UniProt 6–177

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

SAXS profile for 7a4m

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 7a4m
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2. Structure Basics 2. Structure Basics

Entry ID entry_id7a4m
Deposition date deposition_date2020-08-20
Structure title titleCryo-EM structure of mouse heavy-chain apoferritin at 1.22 A
Keywords keywordsIron storage, metal binding protein; METAL BINDING PROTEIN
Experimental Method methodELECTRON MICROSCOPY

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier19.13
Radius of gyration Rg (electron density) rg_electron18.33
Forward intensity I(0) i08087880.00
Molecular weight molecular_weight20147.0 kDa
Excluded volume excluded_volume24865 ų
Envelope volume envelope_volume29290 ų
Hydration-shell volume shell_volume14389 ų
Envelope diameter envelope_diameter69.3
Shell Rg shell_rg23.29
Envelope Rg envelope_rg18.72
Shape Rg shape_rg18.29
Total Rg total_rg19.24
Total atoms total_atoms2781
Residues n_residues172
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax68.0
Rg (real space) rg_real19.27
Rg uncertainty (real space) rg_real_error0.64
I(0) (real space) i0_real8.0880e+06
I(0) uncertainty (real space) i0_real_error1.0430e+05
Rg (reciprocal space) rg_reciprocal19.25
I(0) (reciprocal space) i0_reciprocal8088000.0000
Solution quality estimate total_estimate0.7371
Solution quality rating solution_quality REASONABLE a REASONABLE solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary61.3
Skewness Skewness skewness0.547
Kurtosis Kurtosis kurtosis-0.195
Angular range angular_range— – 0.4150 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha2201000.0000
Real-space data points n_real_points73
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.610; Stabil: 0.998; Sysdev: 1.000; Positv: 1.000; Valcen: 0.755; Smooth: 0.000

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (4)

7. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_idd7a4ma_
Class classa — All alpha proteins
Fold Fold folda.25 — Ferritin-like
Superfamily Superfamily superfamilya.25.1 — Ferritin-like
Family Family familya.25.1.0 — automated matches

CATH v4.4 (1 domains)

Domain ID domain_id7a4mA01
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology1260 — Ferritin
Homologous superfamily homologous superfamily10 — Ferritin, core subunit, four-helix bundle

8. Citations (1)

9. Files and Curves (10)