12gb

High Resolution Structure of Monomorphic AB1-40 Fibrils

Method: SOLID-STATE NMR Dmax: 77.8 Å Quality: GOOD

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

Type IIIb beta-amyloid 40 Filament

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 × 20 PDB declaration: 20-meric(20) 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 Chain G; UniProt 672–711 Chain H; UniProt 672–711 Chain I; UniProt 672–711 Chain J; UniProt 672–711 Chain K; UniProt 672–711 Chain L; UniProt 672–711 Chain M; UniProt 672–711 Chain N; UniProt 672–711 Chain O; UniProt 672–711 Chain P; UniProt 672–711 Chain Q; UniProt 672–711 Chain R; UniProt 672–711 Chain S; UniProt 672–711 Chain T; UniProt 672–711 Not recorded No other associated polymer SOLID-STATE NMR NMR measurement conditions:pH 7.4;277 K;Ionic strength (raw mmCIF value) 20;Pressure 1 NMR sample composition:350 uM [U-13C; U-15N] Amyloid-beta 1-40 fibrils, 95% H2O/5% D2O | 95% H2O/5% D2O Resolution not provided

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 Author chain G; PDBConstruct 1–40; UniProt 672–711 Author chain H; PDBConstruct 1–40; UniProt 672–711 Author chain I; PDBConstruct 1–40; UniProt 672–711 Author chain J; PDBConstruct 1–40; UniProt 672–711 Author chain K; PDBConstruct 1–40; UniProt 672–711 Author chain L; PDBConstruct 1–40; UniProt 672–711 Author chain M; PDBConstruct 1–40; UniProt 672–711 Author chain N; PDBConstruct 1–40; UniProt 672–711 Author chain O; PDBConstruct 1–40; UniProt 672–711 Author chain P; PDBConstruct 1–40; UniProt 672–711 Author chain Q; PDBConstruct 1–40; UniProt 672–711 Author chain R; PDBConstruct 1–40; UniProt 672–711 Author chain S; PDBConstruct 1–40; UniProt 672–711 Author chain T; 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 12gb

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 12gb
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2. Structure Basics 2. Structure Basics

Entry ID entry_id12gb
Deposition date deposition_date2026-04-03
最后修订 last_revision2026-04-15
Structure title titleHigh Resolution Structure of Monomorphic AB1-40 Fibrils
Keywords keywordsamyloid-beta, protein fibril, parallel in-register, cross-beta; PROTEIN FIBRIL
Experimental Method methodSOLID-STATE NMR

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

Radius of gyration Rg (Guinier) rg_guinier23.95
Radius of gyration Rg (electron density) rg_electron23.42
Forward intensity I(0) i05269880000.00
Molecular weight molecular_weight659370.0 kDa
Excluded volume excluded_volume841240 ų
Envelope volume envelope_volume123660 ų
Hydration-shell volume shell_volume38271 ų
Envelope diameter envelope_diameter92.3
Shell Rg shell_rg35.00
Envelope Rg envelope_rg26.09
Shape Rg shape_rg23.48
Total Rg total_rg23.35
Total atoms total_atoms93400
Residues n_residues6200
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 dmax77.8
Rg (real space) rg_real23.77
Rg uncertainty (real space) rg_real_error0.56
I(0) (real space) i0_real5.2700e+09
I(0) uncertainty (real space) i0_real_error8.0380e+07
Rg (reciprocal space) rg_reciprocal23.81
I(0) (reciprocal space) i0_reciprocal5270000000.0000
Solution quality estimate total_estimate0.8020
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks3
Primary peak position r_peak_primary31.6
Skewness Skewness skewness0.114
Kurtosis Kurtosis kurtosis-0.387
Angular range angular_range— – 0.3300 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha8142000.0000
Real-space data points n_real_points65
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.810; Stabil: 0.999; Sysdev: 1.000; Positv: 1.000; Valcen: 0.995; 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)