8ezd

Brain-derived 42-residue amyloid-beta fibril type A

Method: ELECTRON MICROSCOPY Dmax: 58.4 Å Quality: GOOD

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

Beta-amyloid protein 42

Homo sapiens

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 × 8 PDB declaration: octameric(8) Consistent with protein copy count Chain A; UniProt 672–713 Chain B; UniProt 672–713 Chain C; UniProt 672–713 Chain D; UniProt 672–713 Chain E; UniProt 672–713 Chain F; UniProt 672–713 Chain G; UniProt 672–713 Chain H; UniProt 672–713 Fragment:residues 672-713 No other associated polymer ELECTRON MICROSCOPY cryo-EM buffer:pH 7.4;10mM Na-phosphate, 0.1% sodium azide cryo-EM vitrification conditions:Cryogen ETHANE;Preblot for 12-13 seconds and blot for 2.5-3.0 seconds before plunging Resolution 2.83 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 1–42; UniProt 672–713 Author chain B; PDBConstruct 1–42; UniProt 672–713 Author chain C; PDBConstruct 1–42; UniProt 672–713 Author chain D; PDBConstruct 1–42; UniProt 672–713 Author chain E; PDBConstruct 1–42; UniProt 672–713 Author chain F; PDBConstruct 1–42; UniProt 672–713 Author chain G; PDBConstruct 1–42; UniProt 672–713 Author chain H; PDBConstruct 1–42; UniProt 672–713

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 8ezd

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 8ezd
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2. Structure Basics 2. Structure Basics

Entry ID entry_id8ezd
Deposition date deposition_date2022-10-31
Structure title titleBrain-derived 42-residue amyloid-beta fibril type A
Keywords keywordsamyloid-b 42 (Ab42) fibril, Alzheimer's disease (AD), Polymorphism., PROTEIN FIBRIL; PROTEIN FIBRIL
Experimental Method methodELECTRON MICROSCOPY

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

Radius of gyration Rg (Guinier) rg_guinier20.50
Radius of gyration Rg (electron density) rg_electron19.77
Forward intensity I(0) i0625745000.00
Molecular weight molecular_weight229670.0 kDa
Excluded volume excluded_volume295350 ų
Envelope volume envelope_volume48383 ų
Hydration-shell volume shell_volume20059 ų
Envelope diameter envelope_diameter67.5
Shell Rg shell_rg26.59
Envelope Rg envelope_rg20.59
Shape Rg shape_rg19.80
Total Rg total_rg19.81
Total atoms total_atoms33120
Residues n_residues2232
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 dmax58.4
Rg (real space) rg_real20.45
Rg uncertainty (real space) rg_real_error0.28
I(0) (real space) i0_real6.2570e+08
I(0) uncertainty (real space) i0_real_error7.0980e+06
Rg (reciprocal space) rg_reciprocal20.47
I(0) (reciprocal space) i0_reciprocal625700000.0000
Solution quality estimate total_estimate0.8265
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary25.9
Skewness Skewness skewness0.117
Kurtosis Kurtosis kurtosis-0.747
Angular range angular_range— – 0.3900 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha397700.0000
Real-space data points n_real_points71
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.923; Stabil: 0.999; Sysdev: 1.000; Positv: 1.000; Valcen: 0.972; 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)