4bfq

Assembly of a triple pi-stack of ligands in the binding site of Aplysia californica acetylcholine binding protein (AChBP)

Method: X-RAY DIFFRACTION Dmax: 87.3 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 20–236 Chain B; UniProt 20–236 Chain C; UniProt 20–236 Chain D; UniProt 20–236 Chain E; UniProt 20–236 Not recorded 083 4,6-dimethyl-N'-(3-pyridin-2-ylisoquinolin-1-yl)pyrimidine-2-carboximidamide × 14 GOL GLYCEROL × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION;pH 8;292 K;THE VUF9432-AC-ACHBP COMPLEX WAS FORMED BY MIXING THE PROTEIN AT 3.5 MG/ML WITH 1MM VUF9432 AND INCUBATING ON ICE FOR 1 HOUR. CRYSTALS WERE GROWN USING THE VAPOUR DIFFUSION METHOD IN A SOLUTION CONSISTING OF 0.2M LISO4, 0.8M AMMONIUM SULPHATE IN MMT BUFFER (PH 8.0) AND 19 DEGREES C Resolution 2.40 Å R-free 0.247

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 1–217; UniProt 20–236 Author chain B; PDBConstruct 1–217; UniProt 20–236 Author chain C; PDBConstruct 1–217; UniProt 20–236 Author chain D; PDBConstruct 1–217; UniProt 20–236 Author chain E; PDBConstruct 1–217; UniProt 20–236

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 4bfq

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 4bfq
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2. Structure Basics 2. Structure Basics

Entry ID entry_id4bfq
Deposition date deposition_date2013-03-21
Structure title titleAssembly of a triple pi-stack of ligands in the binding site of Aplysia californica acetylcholine binding protein (AChBP)
Keywords keywords;RECEPTOR, ACETYLCHOLINE BINDING PROTEIN, NICOTINIC ACETYLCHOLINE RECEPTOR, CYS-LOOP RECEPTOR, NACHR, ION CHANNEL, PI-STACKING, TRIPLE LIGAND BINDING, DRUG DESIGN ;; RECEPTOR
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier31.49
Radius of gyration Rg (electron density) rg_electron30.29
Forward intensity I(0) i0441132000.00
Molecular weight molecular_weight113080.0 kDa
Excluded volume excluded_volume109880 ų
Envelope volume envelope_volume193270 ų
Hydration-shell volume shell_volume50586 ų
Envelope diameter envelope_diameter93.1
Shell Rg shell_rg39.58
Envelope Rg envelope_rg29.41
Shape Rg shape_rg30.24
Total Rg total_rg30.99
Total atoms total_atoms8564
Residues n_residues1025
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 dmax87.3
Rg (real space) rg_real31.16
Rg uncertainty (real space) rg_real_error0.46
I(0) (real space) i0_real4.4110e+08
I(0) uncertainty (real space) i0_real_error5.4810e+06
Rg (reciprocal space) rg_reciprocal31.30
I(0) (reciprocal space) i0_reciprocal441200000.0000
Solution quality estimate total_estimate0.9084
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary45.4
Skewness Skewness skewness-0.087
Kurtosis Kurtosis kurtosis-0.614
Angular range angular_range— – 0.2500 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha60420000.0000
Real-space data points n_real_points51
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.961; Stabil: 0.997; Sysdev: 1.000; Positv: 1.000; Valcen: 0.984; Smooth: 0.947

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (4)

7. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (5 domains)

Domain ID domain_idd4bfqa_
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_idd4bfqb_
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_idd4bfqc_
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_idd4bfqd_
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_idd4bfqe_
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_id4bfqA00
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_id4bfqB00
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_id4bfqC00
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_id4bfqD00
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_id4bfqE00
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)