3BF0

Crystal structure of Escherichia coli Signal peptide peptidase (SppA), Native crystals


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP7.5291PEG3350, pH 7.5, vapor diffusion, hanging drop, temperature 291K
Crystal Properties
Matthews coefficientSolvent content
2.7655.4

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 94.171α = 90
b = 153.485β = 104.25
c = 100.659γ = 90
Symmetry
Space GroupP 1 21 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSCmirrorsMSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONNSLS BEAMLINE X4A0.97925NSLSX4A

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)R Sym 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
12.55096.20.1220.122167.28657986579
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)R-Sym I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
2.52.680.80.3240.323.267232

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodResolution (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 REPLACEMENTTHROUGHOUT2.555086551433896.160.2170.2140.252RANDOM28.947
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]
2.31.8-1.840.43
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg39.861
r_dihedral_angle_3_deg19.427
r_dihedral_angle_4_deg17.424
r_dihedral_angle_1_deg7.726
r_scangle_it3.586
r_scbond_it2.196
r_angle_refined_deg1.765
r_mcangle_it1.474
r_mcbond_it0.877
r_nbtor_refined0.314
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg39.861
r_dihedral_angle_3_deg19.427
r_dihedral_angle_4_deg17.424
r_dihedral_angle_1_deg7.726
r_scangle_it3.586
r_scbond_it2.196
r_angle_refined_deg1.765
r_mcangle_it1.474
r_mcbond_it0.877
r_nbtor_refined0.314
r_nbd_refined0.232
r_xyhbond_nbd_refined0.156
r_symmetry_vdw_refined0.152
r_chiral_restr0.122
r_symmetry_hbond_refined0.094
r_bond_refined_d0.016
r_gen_planes_refined0.006
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms14377
Nucleic Acid Atoms
Solvent Atoms488
Heterogen Atoms

Software

Software
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction