9sg3

X-ray structure of acetylcholine binding protein (AChBP) in complex with IOTA739

Method: X-RAY DIFFRACTION Dmax: 130.0 Å Quality: GOOD

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

Acetylcholine-binding protein

Lymnaea stagnalis

UniProt P58154

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 20–225 Chain B; UniProt 20–225 Chain C; UniProt 20–225 Chain D; UniProt 20–225 Chain E; UniProt 20–225 Not recorded NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 3 PHN 1,10-PHENANTHROLINE × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;293 K;PEG3350 3% Ammonium sulfate 1.8 M HEPES buffer 0.1M, pH 7.75 Resolution 3.00 Å R-free 0.269
2 Protein homooligomer Homooligomer Protein × 5 PDB declaration: pentameric(5) Consistent with protein copy count Chain F; UniProt 20–225 Chain G; UniProt 20–225 Chain H; UniProt 20–225 Chain I; UniProt 20–225 Chain J; UniProt 20–225 Not recorded PHN 1,10-PHENANTHROLINE × 2 SO4 SULFATE ION × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;293 K;PEG3350 3% Ammonium sulfate 1.8 M HEPES buffer 0.1M, pH 7.75 Resolution 3.00 Å R-free 0.269

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.

59 other PDB entries and 121 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name ACHP_LYMST
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–206; UniProt 20–225 Author chain B; PDBConstruct 1–206; UniProt 20–225 Author chain C; PDBConstruct 1–206; UniProt 20–225 Author chain D; PDBConstruct 1–206; UniProt 20–225 Author chain E; PDBConstruct 1–206; UniProt 20–225 Author chain F; PDBConstruct 1–206; UniProt 20–225 Author chain G; PDBConstruct 1–206; UniProt 20–225 Author chain H; PDBConstruct 1–206; UniProt 20–225 Author chain I; PDBConstruct 1–206; UniProt 20–225 Author chain J; PDBConstruct 1–206; UniProt 20–225

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 9sg3

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 9sg3
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2. Structure Basics 2. Structure Basics

Entry ID entry_id9sg3
Deposition date deposition_date2025-08-21
Structure title titleX-ray structure of acetylcholine binding protein (AChBP) in complex with IOTA739
Keywords keywordsAcetylcholine binding protein, ligand gated ion channel, SPR, CHOLINE-BINDING PROTEIN; CHOLINE-BINDING PROTEIN
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier40.66
Radius of gyration Rg (electron density) rg_electron39.84
Forward intensity I(0) i0822007000.00
Molecular weight molecular_weight230080.0 kDa
Excluded volume excluded_volume285870 ų
Envelope volume envelope_volume378810 ų
Hydration-shell volume shell_volume77345 ų
Envelope diameter envelope_diameter134.6
Shell Rg shell_rg47.02
Envelope Rg envelope_rg38.70
Shape Rg shape_rg39.81
Total Rg total_rg40.31
Total atoms total_atoms16218
Residues n_residues2014
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 dmax130.0
Rg (real space) rg_real40.53
Rg uncertainty (real space) rg_real_error1.04
I(0) (real space) i0_real8.2200e+08
I(0) uncertainty (real space) i0_real_error1.5310e+07
Rg (reciprocal space) rg_reciprocal40.66
I(0) (reciprocal space) i0_reciprocal822100000.0000
Solution quality estimate total_estimate0.8752
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary50.0
Skewness Skewness skewness0.255
Kurtosis Kurtosis kurtosis-0.334
Angular range angular_range— – 0.1950 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha156100000.0000
Real-space data points n_real_points40
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.831; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.989; Smooth: 0.893

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (5)

8. Citations (1)

9. Files and Curves (10)