Structure of the pentameric ligand-gated ion channel ELIC cocrystallized with its competitive antagonist acetylcholine.

Pan, J; Chen, Q; Willenbring, D; Yoshida, K; Tillman, T; Kashlan, O.B; Cohen, A; Kong, X.P; Xu, Y; Tang, P.

Macromolecule Content

Unique protein chains: 1

3RQW

Crystal structure of acetylcholine bound to a prokaryotic pentameric ligand-gated ion channel, ELIC

DOI: 10.2210/pdb3rqw/pdb

Classification: TRANSPORT PROTEIN
Deposited: 2011-04-28 Released: 2012-03-07
Deposition author(s): Pan, J.J., Chen, Q., Yoshida, K., Cohen, A., Kong, X.P., Xu, Y., Tang, P.
Organism: Dickeya dadantii
Expression System: Escherichia coli

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.91 Å
R-Value Free: 0.231
R-Value Work: 0.206

wwPDB Validation 3D Report Full Report

Literature

Macromolecules

Classification: TRANSPORT PROTEIN

Total Structure Weight: 374499.88

Macromolecule Entities
Molecule	Chains	Length	Organism	Details
ELIC Pentameric Ligand Gated Ion Channel from Erwinia Chrysanthemi	A, B, C..., D, E, F, G, H, I, JA, B, C, D, E, F, G, H, I, J	322	Dickeya dadantii	Fragment: UNP residues 22-343 Gene Name(s): Dda3937_00520
Metabolic Pathways Maps: Reactions: ESCHER BiGG
Protein Feature View - UniProtKB AC: E0SJQ4 UniProt Full Protein Feature View for E0SJQ4 Find similar proteins by: Sequence \| Structure Show Detailed Protein Feature View for E0SJQ4/3RQW

Membrane Protein

Source: mpstruc | Group: ALPHA-HELICAL

Subgroup Name: Cys-Loop Receptor Family

Protein Name: Prokaryotic pentameric ligand-gated ion channel (ELIC)

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions	3D Interactions
MES Query on MES Download SDF File Download CCD File	A, B, D, E, F, G, I, J	2-(N-MORPHOLINO)-ETHANESULFONIC ACID C₆ H₁₃ N O₄ S SXGZJKUKBWWHRA-UHFFFAOYSA-N	Poseview Image of MES in 3RQW Help Black dashed lines indicate hydrogen bonds, salt bridges, and metal interactions. Green solid line show hydrophobic interactions and green dashed lines show π-π and π-cation interactions. Source Information Interactions are determined by geometric criteria as described in K. Stierand, M. Rarey (2010), Drawing the PDB: Protein-ligand complexes in two dimensions, ACS Med. Chem. Lett., DOI: 10.1021/ml100164p. Ions and some metal complexes are excluded, as well as cases where no interaction profile could be generated. Poseview diagrams can be calculated for approximately 92% of the remaining complexes in the PDB. PoseView is developed at the Center for Bioinformatics Hamburg and jointly provided with BioSolveIT as a community service at the PDB. A stand-alone version is provided by BioSolveIT.	Ligand Explorer NGL Binding Pocket (JSmol) Electron Density (JSmol)
ACH Query on ACH Download SDF File Download CCD File	A, B, C, D, E, F, G, H, I, J	ACETYLCHOLINE C₇ H₁₆ N O₂ OIPILFWXSMYKGL-UHFFFAOYSA-N	Poseview Image of ACH in 3RQW Help Black dashed lines indicate hydrogen bonds, salt bridges, and metal interactions. Green solid line show hydrophobic interactions and green dashed lines show π-π and π-cation interactions. Source Information Interactions are determined by geometric criteria as described in K. Stierand, M. Rarey (2010), Drawing the PDB: Protein-ligand complexes in two dimensions, ACS Med. Chem. Lett., DOI: 10.1021/ml100164p. Ions and some metal complexes are excluded, as well as cases where no interaction profile could be generated. Poseview diagrams can be calculated for approximately 92% of the remaining complexes in the PDB. PoseView is developed at the Center for Bioinformatics Hamburg and jointly provided with BioSolveIT as a community service at the PDB. A stand-alone version is provided by BioSolveIT.	Ligand Explorer NGL Binding Pocket (JSmol) Electron Density (JSmol)
GOL Query on GOL Download SDF File Download CCD File	A, B, C, D, E, F, G, H, I, J	GLYCEROL 2, (Synonym) C₃ H₈ O₃ PEDCQBHIVMGVHV-UHFFFAOYSA-N	Poseview Image of GOL in 3RQW Help Black dashed lines indicate hydrogen bonds, salt bridges, and metal interactions. Green solid line show hydrophobic interactions and green dashed lines show π-π and π-cation interactions. Source Information Interactions are determined by geometric criteria as described in K. Stierand, M. Rarey (2010), Drawing the PDB: Protein-ligand complexes in two dimensions, ACS Med. Chem. Lett., DOI: 10.1021/ml100164p. Ions and some metal complexes are excluded, as well as cases where no interaction profile could be generated. Poseview diagrams can be calculated for approximately 92% of the remaining complexes in the PDB. PoseView is developed at the Center for Bioinformatics Hamburg and jointly provided with BioSolveIT as a community service at the PDB. A stand-alone version is provided by BioSolveIT.	Ligand Explorer NGL Binding Pocket (JSmol) Electron Density (JSmol)

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
ACH	N/A in BindingDB N/A in BindingMoad Kd: 2000000 nM PDBbind

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.91 Å
R-Value Free: 0.231
R-Value Work: 0.206
Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 105.76	α = 90.00
b = 266.07	β = 107.82
c = 111.16	γ = 90.00

Structure Validation

View Full Validation Report or Ramachandran Plots

Entry History

Deposition Data

Deposited Date: 2011-04-28
Released Date: 2012-03-07
Deposition author(s): Pan, J.J., Chen, Q., Yoshida, K., Cohen, A., Kong, X.P., Xu, Y., Tang, P.

Revision History

2012-03-14
Type: Database references, Other, Structure summary
2012-03-28
Type: Database references

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