2CEK

Conformational Flexibility in the Peripheral Site of Torpedo californica Acetylcholinesterase Revealed by the Complex Structure with a Bifunctional Inhibitor


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1EA5PDB ENTRY 1EA5

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1627732% PEG200, 150MM MES, PH6.0, 4DEG. C. 12 HOURS OF SOAKING WITH A PUTATIVE ANTI-ALZHEIMER DRUG.
Crystal Properties
Matthews coefficientSolvent content
3.868

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 111.94α = 90
b = 111.94β = 90
c = 137.12γ = 120
Symmetry
Space GroupP 31 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC QUANTUM 42005-02-10MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONESRF BEAMLINE ID14-2ESRFID14-2

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
12.22099.90.0616.184.9250867327.1
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
12.22.3399.90.393.364.98

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation 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 REPLACEMENTTHROUGHOUTPDB ENTRY 1EA52.22050867253799.90.1750.1750.206RANDOM43
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]
8.264.938.26-16.52
RMS Deviations
KeyRefinement Restraint Deviation
c_dihedral_angle_d22.4
c_scangle_it3.03
c_scbond_it2.07
c_mcangle_it1.87
c_angle_deg1.3
c_mcbond_it1.19
c_improper_angle_d0.86
c_bond_d0.006
c_bond_d_na
c_bond_d_prot
RMS Deviations
KeyRefinement Restraint Deviation
c_dihedral_angle_d22.4
c_scangle_it3.03
c_scbond_it2.07
c_mcangle_it1.87
c_angle_deg1.3
c_mcbond_it1.19
c_improper_angle_d0.86
c_bond_d0.006
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms4245
Nucleic Acid Atoms
Solvent Atoms660
Heterogen Atoms158

Software

Software
Software NamePurpose
CNSrefinement
XDSdata reduction
XSCALEdata scaling
CNSphasing