2xnu

Acetylcholine binding protein (AChBP) as template for hierarchical in silico screening procedures to identify structurally novel ligands for the nicotinic receptors

Method: X-RAY DIFFRACTION Dmax: 89.4 Å Quality: EXCELLENT

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

SOLUBLE ACETYLCHOLINE RECEPTOR

APLYSIA CALIFORNICA

UniProt Q8WSF8

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 1–236 Chain B; UniProt 1–236 Chain C; UniProt 1–236 Chain D; UniProt 1–236 Chain E; UniProt 1–236 Not recorded VU3 2-(2-(4-PHENYLPIPERIDIN-1-YL)ETHYL)-1H-INDOLE × 1 X-RAY DIFFRACTION X-ray crystallization conditions:pH 7.5;0.2M SODIUM BROMIDE, 0.1M BIS-TRIS PROPANE PH 7.5, 20% PEG3350 Resolution 2.55 Å R-free 0.230

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.

85 other PDB entries and 120 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name Q8WSF8_APLCA
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–236; UniProt 1–236 Author chain B; PDBConstruct 1–236; UniProt 1–236 Author chain C; PDBConstruct 1–236; UniProt 1–236 Author chain D; PDBConstruct 1–236; UniProt 1–236 Author chain E; PDBConstruct 1–236; UniProt 1–236

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 2xnu

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 2xnu
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2. Structure Basics 2. Structure Basics

Entry ID entry_id2xnu
Deposition date deposition_date2010-08-06
Structure title titleAcetylcholine binding protein (AChBP) as template for hierarchical in silico screening procedures to identify structurally novel ligands for the nicotinic receptors
Keywords keywordsRECEPTOR, CHOLINE-BINDING PROTEIN, IN-SILICO SCREENING, LIGAND-GATED ION CHANNELS, ELECTROPHYSIOLOGY, CYS-LOOP RECEPTORS; RECEPTOR
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier31.68
Radius of gyration Rg (electron density) rg_electron30.00
Forward intensity I(0) i0220239000.00
Molecular weight molecular_weight116840.0 kDa
Excluded volume excluded_volume145730 ų
Envelope volume envelope_volume189220 ų
Hydration-shell volume shell_volume49900 ų
Envelope diameter envelope_diameter94.0
Shell Rg shell_rg39.34
Envelope Rg envelope_rg29.23
Shape Rg shape_rg29.99
Total Rg total_rg30.91
Total atoms total_atoms8225
Residues n_residues1027
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 dmax89.4
Rg (real space) rg_real31.34
Rg uncertainty (real space) rg_real_error0.35
I(0) (real space) i0_real2.2020e+08
I(0) uncertainty (real space) i0_real_error2.8850e+06
Rg (reciprocal space) rg_reciprocal31.49
I(0) (reciprocal space) i0_reciprocal220300000.0000
Solution quality estimate total_estimate0.9057
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary44.7
Skewness Skewness skewness-0.094
Kurtosis Kurtosis kurtosis-0.600
Angular range angular_range— – 0.2500 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha52020000.0000
Real-space data points n_real_points51
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.950; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.975; Smooth: 0.946

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

7. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (5 domains)

Domain ID domain_idd2xnua_
Class classb — All beta proteins
Fold Fold foldb.96 — Nicotinic receptor ligand binding domain-like
Superfamily Superfamily superfamilyb.96.1 — Nicotinic receptor ligand binding domain-like
Family Family familyb.96.1.0 — automated matches
Domain ID domain_idd2xnub_
Class classb — All beta proteins
Fold Fold foldb.96 — Nicotinic receptor ligand binding domain-like
Superfamily Superfamily superfamilyb.96.1 — Nicotinic receptor ligand binding domain-like
Family Family familyb.96.1.0 — automated matches
Domain ID domain_idd2xnuc_
Class classb — All beta proteins
Fold Fold foldb.96 — Nicotinic receptor ligand binding domain-like
Superfamily Superfamily superfamilyb.96.1 — Nicotinic receptor ligand binding domain-like
Family Family familyb.96.1.0 — automated matches
Domain ID domain_idd2xnud_
Class classb — All beta proteins
Fold Fold foldb.96 — Nicotinic receptor ligand binding domain-like
Superfamily Superfamily superfamilyb.96.1 — Nicotinic receptor ligand binding domain-like
Family Family familyb.96.1.0 — automated matches
Domain ID domain_idd2xnue_
Class classb — All beta proteins
Fold Fold foldb.96 — Nicotinic receptor ligand binding domain-like
Superfamily Superfamily superfamilyb.96.1 — Nicotinic receptor ligand binding domain-like
Family Family familyb.96.1.0 — automated matches

CATH v4.4 (5 domains)

Domain ID domain_id2xnuA00
Class class2 — Mainly Beta
Architecture architecture70 — Distorted Sandwich
Topology topology170 — Acetylcholine Binding Protein; Chain: A,
Homologous superfamily homologous superfamily10 — Neurotransmitter-gated ion-channel ligand-binding domain
Domain ID domain_id2xnuB00
Class class2 — Mainly Beta
Architecture architecture70 — Distorted Sandwich
Topology topology170 — Acetylcholine Binding Protein; Chain: A,
Homologous superfamily homologous superfamily10 — Neurotransmitter-gated ion-channel ligand-binding domain
Domain ID domain_id2xnuC00
Class class2 — Mainly Beta
Architecture architecture70 — Distorted Sandwich
Topology topology170 — Acetylcholine Binding Protein; Chain: A,
Homologous superfamily homologous superfamily10 — Neurotransmitter-gated ion-channel ligand-binding domain
Domain ID domain_id2xnuD00
Class class2 — Mainly Beta
Architecture architecture70 — Distorted Sandwich
Topology topology170 — Acetylcholine Binding Protein; Chain: A,
Homologous superfamily homologous superfamily10 — Neurotransmitter-gated ion-channel ligand-binding domain
Domain ID domain_id2xnuE00
Class class2 — Mainly Beta
Architecture architecture70 — Distorted Sandwich
Topology topology170 — Acetylcholine Binding Protein; Chain: A,
Homologous superfamily homologous superfamily10 — Neurotransmitter-gated ion-channel ligand-binding domain

8. Citations (1)

9. Files and Curves (10)