2XRS

Crystal structures exploring the origins of the broader specificity of escherichia coli heat-labile enterotoxin compared to cholera toxin


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1EFIPDB ENTRY 1EFI

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
16.520% PEG 3350, 200 MM SODIUM CITRATE, 20% GLYCEROL, 100MM BIS-TRIS PROPANE (PH 6.5)
Crystal Properties
Matthews coefficientSolvent content
2.551.1

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 53.42α = 94.57
b = 61.06β = 95.24
c = 100.83γ = 114.1
Symmetry
Space GroupP 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100IMAGE PLATERIGAKU RAXIS IV++MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODERIGAKU MICROMAX-007 HF

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
11.81487.30.088.352.492987325.32
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)
11.81.967.10.482.262.3

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 1EFI1.8113.998817947901000.196050.19480.21864RANDOM21.367
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]
0.61-0.91-1.65-0.60.34-1
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg36.364
r_dihedral_angle_4_deg23.249
r_dihedral_angle_3_deg12.679
r_dihedral_angle_1_deg6.443
r_scangle_it2.709
r_scbond_it1.735
r_angle_refined_deg1.275
r_mcangle_it0.805
r_mcbond_it0.397
r_chiral_restr0.084
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg36.364
r_dihedral_angle_4_deg23.249
r_dihedral_angle_3_deg12.679
r_dihedral_angle_1_deg6.443
r_scangle_it2.709
r_scbond_it1.735
r_angle_refined_deg1.275
r_mcangle_it0.805
r_mcbond_it0.397
r_chiral_restr0.084
r_bond_refined_d0.013
r_gen_planes_refined0.005
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
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_other
r_mcangle_other
r_scbond_other
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 Atoms8240
Nucleic Acid Atoms
Solvent Atoms819
Heterogen Atoms266

Software

Software
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
MOLREPphasing