7B38

Torpedo californica acetylcholinesterase complexed with Mg+2


X-RAY DIFFRACTION

Starting Model(s)

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

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP5.8293Mixing 2 uL of protein (10-13 mg/mL in 0.1 M NaCl/0.1 M 2-morpholinoethanesulfonic acid (MES)/0.02% sodium azide, pH 5.8) with 2 uL of precipitant solution (0.2 M magnesium acetate/10-15% (v/v) polyethylene glycol (PEG) 5000 monomethyl ether, 0.1 M MES, pH 6.5), thus yielding crystals of the Mg+2/TcAChE complex
Crystal Properties
Matthews coefficientSolvent content
3.2462.04

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 138.217α = 90
b = 138.217β = 90
c = 71.376γ = 120
Symmetry
Space GroupP 32 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray155CCDADSC QUANTUM 12001-01-12MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONESRF BEAMLINE ID14-20.93ESRFID14-2

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)CC (Half)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
11.8534.8399.70.8510.626995328.37
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)CC (Half)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
11.861.8799.940.32.5

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 REPLACEMENTFREE R-VALUE1EA51.8534.8366943329299.640.20410.20220.24134.92%36.12
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]
RMS Deviations
KeyRefinement Restraint Deviation
f_dihedral_angle_d3.5303
f_angle_d0.8115
f_chiral_restr0.0519
f_bond_d0.0071
f_plane_restr0.0051
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms4200
Nucleic Acid Atoms
Solvent Atoms400
Heterogen Atoms127

Software

Software
Software NamePurpose
REFMACrefinement
PHENIXrefinement
DENZOdata reduction
SCALEPACKdata scaling
MERLOTphasing
Cootmodel building