4AJ3

3D structure of E. coli Isocitrate Dehydrogenase in complex with Isocitrate, calcium(II) and NADP - The pseudo-Michaelis complex


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1AI2PDB ENTRY 1AI2

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
11.85 M NH4SO4, 50 MM CITRIC ACID/NA2HPO4 BUFFER PH 5.8, 0.1 M NACL AND 0.2 M DTT
Crystal Properties
Matthews coefficientSolvent content
4.572

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 105.297α = 90
b = 105.297β = 90
c = 145.723γ = 90
Symmetry
Space GroupP 43 21 2

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDBRUKER AXS PT135MONTEL MIRRORSMSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODEBRUKER AXS MICROSTAR

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
11.947.199.90.1111.25.76518119.9
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)
11.921000.541.73.4

Refinement

Statistics
Diffraction IDStructure Solution MethodStarting modelResolution (High)Resolution (Low)Cut-off Sigma (F)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTPDB ENTRY 1AI21.944.8091.3365078327299.940.19040.18860.224
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]
-5.8691-5.8691-11.241
RMS Deviations
KeyRefinement Restraint Deviation
f_dihedral_angle_d14.554
f_angle_d1.088
f_chiral_restr0.07
f_bond_d0.007
f_plane_restr0.004
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms3210
Nucleic Acid Atoms
Solvent Atoms374
Heterogen Atoms62

Software

Software
Software NamePurpose
PHENIXrefinement
SAINTdata reduction
SADABSdata scaling
PHASERphasing