8pk2

Cryo EM structure of the type 1m polymorph of alpha-synuclein

Method: ELECTRON MICROSCOPY Dmax: 69.7 Å Quality: GOOD

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

Alpha-synuclein

Homo sapiens

UniProt P37840

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 × 5 PDB declaration: pentameric(5) Consistent with protein copy count Chain A; UniProt 1–140 Chain B; UniProt 1–140 Chain C; UniProt 1–140 Chain D; UniProt 1–140 Chain E; UniProt 1–140 Not recorded No other associated polymer ELECTRON MICROSCOPY cryo-EM buffer:pH 7 cryo-EM vitrification conditions:Cryogen ETHANE-PROPANE Resolution 3.26 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.

226 other PDB entries and 234 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name SYUA_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–140; UniProt 1–140 Author chain B; PDBConstruct 1–140; UniProt 1–140 Author chain C; PDBConstruct 1–140; UniProt 1–140 Author chain D; PDBConstruct 1–140; UniProt 1–140 Author chain E; PDBConstruct 1–140; UniProt 1–140

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 8pk2

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 8pk2
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2. Structure Basics 2. Structure Basics

Entry ID entry_id8pk2
Deposition date deposition_date2023-06-24
Structure title titleCryo EM structure of the type 1m polymorph of alpha-synuclein
Keywords keywordsamyloid, 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_guinier21.59
Radius of gyration Rg (electron density) rg_electron20.88
Forward intensity I(0) i021324300.00
Molecular weight molecular_weight35616.0 kDa
Excluded volume excluded_volume44982 ų
Envelope volume envelope_volume54782 ų
Hydration-shell volume shell_volume21951 ų
Envelope diameter envelope_diameter69.0
Shell Rg shell_rg27.57
Envelope Rg envelope_rg21.35
Shape Rg shape_rg20.86
Total Rg total_rg21.86
Total atoms total_atoms2505
Residues n_residues365
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 dmax69.7
Rg (real space) rg_real21.54
Rg uncertainty (real space) rg_real_error0.46
I(0) (real space) i0_real2.1320e+07
I(0) uncertainty (real space) i0_real_error3.1020e+05
Rg (reciprocal space) rg_reciprocal21.55
I(0) (reciprocal space) i0_reciprocal21320000.0000
Solution quality estimate total_estimate0.8970
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary24.6
Skewness Skewness skewness0.271
Kurtosis Kurtosis kurtosis-0.460
Angular range angular_range— – 0.3700 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha4165000.0000
Real-space data points n_real_points69
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.894; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.997; Smooth: 0.977

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (1)

8. Citations (2)

9. Files and Curves (10)