4CXM

Crystal Structure of Plasmodium Falciparum Spermidine Synthase in Complex with METHYLTHIOADENOSIN AND SPERMIDINE after catalysis in crystal


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 2I7CPDB ENTRY 2I7C

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
127 % PEG 3350, 0.1 M MES PH 5.5, 0.1 M AMMONIUM SULPHATE
Crystal Properties
Matthews coefficientSolvent content
3.3863.66

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 197.9α = 90
b = 134.4β = 95.5
c = 48.3γ = 90
Symmetry
Space GroupC 1 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray110CCDMARRESEARCH 65 MMMULTILAYER MIRROR2013-12-13MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONMAX II BEAMLINE I911-2MAX III911-2

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
11.755098.60.0514.982.71247151
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)
11.751.8698.70.532.293.04

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 2I7C1.7544.94118415625598.570.180830.179020.21554RANDOM25.319
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
r_dihedral_angle_2_deg39.62
r_dihedral_angle_4_deg19.121
r_dihedral_angle_3_deg14.258
r_dihedral_angle_1_deg6.607
r_angle_refined_deg2.18
r_angle_other_deg1.078
r_chiral_restr0.149
r_bond_refined_d0.023
r_gen_planes_refined0.012
r_bond_other_d0.001
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg39.62
r_dihedral_angle_4_deg19.121
r_dihedral_angle_3_deg14.258
r_dihedral_angle_1_deg6.607
r_angle_refined_deg2.18
r_angle_other_deg1.078
r_chiral_restr0.149
r_bond_refined_d0.023
r_gen_planes_refined0.012
r_bond_other_d0.001
r_gen_planes_other0.001
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_it
r_mcbond_other
r_mcangle_it
r_mcangle_other
r_scbond_it
r_scbond_other
r_scangle_it
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms6750
Nucleic Acid Atoms
Solvent Atoms496
Heterogen Atoms90

Software

Software
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALEPACKdata scaling
MOLREPphasing