3RQW

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


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 2VL0PDB ENTRY 2VL0

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, SITTING DROP6.127712% PEG4000, 0.1 M MES, 0.2 M ammonium sulfate, pH 6.1, VAPOR DIFFUSION, SITTING DROP, temperature 277K
Crystal Properties
Matthews coefficientSolvent content
4.0469.54

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 105.763α = 90
b = 266.068β = 107.82
c = 111.162γ = 90
Symmetry
Space GroupP 1 21 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-rayPIXELDECTRIS PILATUS 6M2011-03-24MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONSSRL BEAMLINE BL12-2SSRLBL12-2

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
12.9129.8980.04422.13.91246252

Refinement

Statistics
Diffraction IDStructure Solution MethodStarting modelResolution (High)Resolution (Low)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTPDB ENTRY 2VL02.91324.977117512590192.540.2070.20570.2309RANDOM
Temperature Factor Modeling
Anisotropic B[1][1]Anisotropic B[1][2]Anisotropic B[1][3]Anisotropic B[2][2]Anisotropic B[2][3]Anisotropic B[3][3]
12.718913.7734-17.87865.1597
RMS Deviations
KeyRefinement Restraint Deviation
f_dihedral_angle_d16.354
f_angle_d1.144
f_chiral_restr0.073
f_bond_d0.008
f_plane_restr0.008
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms25050
Nucleic Acid Atoms
Solvent Atoms90
Heterogen Atoms368

Software

Software
Software NamePurpose
SSRLdata collection
PHENIXmodel building
PHENIXrefinement
XDSdata reduction
SCALAdata scaling
PHENIXphasing