11ep

Structure of Rapidly twisting Amyloid-beta 40 fibril , RT-Ab40(C1)

Method: ELECTRON MICROSCOPY Dmax: 83.7 Å Quality: REASONABLE

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

RT-Ab40(C1)

OrganismNot specified

UniProt P05067

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 × 6 PDB declaration: hexameric(6) Consistent with protein copy count Chain A; UniProt 672–711 Chain B; UniProt 672–711 Chain C; UniProt 672–711 Chain D; UniProt 672–711 Chain E; UniProt 672–711 Chain F; UniProt 672–711 Not recorded No other associated polymer ELECTRON MICROSCOPY cryo-EM buffer:pH 7.4 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 2.75 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.

211 other PDB entries and 282 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name A4_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–40; UniProt 672–711 Author chain B; PDBConstruct 1–40; UniProt 672–711 Author chain C; PDBConstruct 1–40; UniProt 672–711 Author chain D; PDBConstruct 1–40; UniProt 672–711 Author chain E; PDBConstruct 1–40; UniProt 672–711 Author chain F; PDBConstruct 1–40; UniProt 672–711

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 11ep

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 11ep
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2. Structure Basics 2. Structure Basics

Entry ID entry_id11ep
Deposition date deposition_date2026-02-19
Structure title titleStructure of Rapidly twisting Amyloid-beta 40 fibril , RT-Ab40(C1)
Keywords keywordsAmyloid-beta 40, rapidly twisting, protein fibril, Ab40; PROTEIN FIBRIL
Experimental Method methodELECTRON MICROSCOPY

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

Radius of gyration Rg (Guinier) rg_guinier21.24
Radius of gyration Rg (electron density) rg_electron21.94
Forward intensity I(0) i0391181000.00
Molecular weight molecular_weight175410.0 kDa
Excluded volume excluded_volume223270 ų
Envelope volume envelope_volume35139 ų
Hydration-shell volume shell_volume14320 ų
Envelope diameter envelope_diameter83.5
Shell Rg shell_rg27.85
Envelope Rg envelope_rg24.72
Shape Rg shape_rg21.92
Total Rg total_rg22.18
Total atoms total_atoms24990
Residues n_residues1680
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 dmax83.7
Rg (real space) rg_real21.74
Rg uncertainty (real space) rg_real_error0.92
I(0) (real space) i0_real3.9120e+08
I(0) uncertainty (real space) i0_real_error5.5660e+06
Rg (reciprocal space) rg_reciprocal21.65
I(0) (reciprocal space) i0_reciprocal391200000.0000
Solution quality estimate total_estimate0.6142
Solution quality rating solution_quality REASONABLE a REASONABLE solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary16.0
Skewness Skewness skewness0.689
Kurtosis Kurtosis kurtosis-0.172
Angular range angular_range— – 0.3750 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha373500.0000
Real-space data points n_real_points69
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.311; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.046; Smooth: 0.000

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (1)

8. Citations (1)

9. Files and Curves (10)