1IY9

Crystal structure of spermidine synthase


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP7.4295PEG, salt, pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 295.0K
Crystal Properties
Matthews coefficientSolvent content
2.4850.33

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 96.1α = 90
b = 105.8β = 90
c = 121.8γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray298CCDMARRESEARCH2001-11-07MMAD
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONAPS BEAMLINE 19-BM1.5418, 1.5621, 1.7321APS19-BM

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (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
12.350925169243983-3-319.7
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
2.32.3875

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodResolution (High)Resolution (Low)Cut-off Sigma (F)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMADTHROUGHOUT2.310015123443983221578.80.2080.2080.254RANDOM34.9
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]
0.030.43-0.46
RMS Deviations
KeyRefinement Restraint Deviation
x_dihedral_angle_d26.1
x_scangle_it6.35
x_scbond_it4.68
x_mcangle_it3.91
x_mcbond_it2.89
x_angle_deg1.7
x_improper_angle_d1.48
x_bond_d0.016
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms8776
Nucleic Acid Atoms
Solvent Atoms323
Heterogen Atoms

Software

Software
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
MLPHAREphasing
X-PLORrefinement