9k0e

Cryo-EM structure of Amyloid-beta42-4b polymorph 2

Method: ELECTRON MICROSCOPY Dmax: 95.7 Å Quality: GOOD

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

Amyloid-beta A4 protein

OrganismNot specified

UniProt B4DMD5

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 heterocomplex Heteromer Protein × 12 PDB declaration: 12-meric(12) Consistent with protein copy count Chain B; UniProt 524–565 Chain G; UniProt 524–565 Chain H; UniProt 524–565 Chain I; UniProt 524–565 Chain N; UniProt 524–565 Chain O; UniProt 524–565 Not recorded Amyloid-beta protein 40 × 6 (P05067) ELECTRON MICROSCOPY cryo-EM buffer:pH 7.4 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 2.80 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.

3 other PDB entries and 3 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name B4DMD5_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain B; PDBConstruct 1–42; UniProt 524–565 Author chain G; PDBConstruct 1–42; UniProt 524–565 Author chain H; PDBConstruct 1–42; UniProt 524–565 Author chain I; PDBConstruct 1–42; UniProt 524–565 Author chain N; PDBConstruct 1–42; UniProt 524–565 Author chain O; PDBConstruct 1–42; UniProt 524–565

Amyloid-beta protein 40

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 heterocomplex Heteromer Protein × 12 PDB declaration: 12-meric(12) Consistent with protein copy count Chain A; UniProt 680–692 Chain D; UniProt 680–692 Chain E; UniProt 680–692 Chain F; UniProt 680–692 Chain L; UniProt 680–692 Chain M; UniProt 680–692 Not recorded Amyloid-beta A4 protein × 6 (B4DMD5) ELECTRON MICROSCOPY cryo-EM buffer:pH 7.4 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 2.80 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 2
Chains and sequence ranges Author chain A; PDBConstruct 1–13; UniProt 680–692 Author chain D; PDBConstruct 1–13; UniProt 680–692 Author chain E; PDBConstruct 1–13; UniProt 680–692 Author chain F; PDBConstruct 1–13; UniProt 680–692 Author chain L; PDBConstruct 1–13; UniProt 680–692 Author chain M; PDBConstruct 1–13; UniProt 680–692

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 9k0e

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 9k0e
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2. Structure Basics 2. Structure Basics

Entry ID entry_id9k0e
Deposition date deposition_date2024-10-15
最后修订 last_revision2025-08-06
Structure title titleCryo-EM structure of Amyloid-beta42-4b polymorph 2
Keywords keywordshelical fibril, amyloid-beta, PROTEIN FIBRIL, MEMBRANE PROTEIN; MEMBRANE PROTEIN
Experimental Method methodELECTRON MICROSCOPY

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

Radius of gyration Rg (Guinier) rg_guinier27.90
Radius of gyration Rg (electron density) rg_electron27.90
Forward intensity I(0) i010920000.00
Molecular weight molecular_weight26623.0 kDa
Excluded volume excluded_volume34062 ų
Envelope volume envelope_volume43825 ų
Hydration-shell volume shell_volume15471 ų
Envelope diameter envelope_diameter93.1
Shell Rg shell_rg30.38
Envelope Rg envelope_rg27.83
Shape Rg shape_rg28.00
Total Rg total_rg27.88
Total atoms total_atoms1884
Residues n_residues246
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 dmax95.7
Rg (real space) rg_real28.42
Rg uncertainty (real space) rg_real_error1.15
I(0) (real space) i0_real1.0920e+07
I(0) uncertainty (real space) i0_real_error1.8940e+05
Rg (reciprocal space) rg_reciprocal28.26
I(0) (reciprocal space) i0_reciprocal10920000.0000
Solution quality estimate total_estimate0.7635
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks4
Primary peak position r_peak_primary31.9
Skewness Skewness skewness0.519
Kurtosis Kurtosis kurtosis-0.493
Angular range angular_range— – 0.2850 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha331300.0000
Real-space data points n_real_points58
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.550; Stabil: 0.999; Sysdev: 1.000; Positv: 1.000; Valcen: 0.316; Smooth: 0.957

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

8. Citations (1)

9. Files and Curves (10)