Crystal structure of a sialic acid binding protein, F87A mutant, from Streptococcus pneumoniae bound to Neu5Ac


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
in silico modelAlphaFold 

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, SITTING DROP5.42930.1M NaCit, 3.6M ammonium sulfate, pH 5.4, 3% glycerol
Crystal Properties
Matthews coefficientSolvent content
2.1943.88

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 79.719α = 90
b = 61.7β = 106.444
c = 89.648γ = 90
Symmetry
Space GroupP 1 21 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100PIXELDECTRIS EIGER2 XE 16M2025-04-09MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONDIAMOND BEAMLINE I030.9762DiamondI03

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)Rrim I (All)CC (Half)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
11.767.3999.80.1160.1250.9969.36.892071
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Rrim I (All)CC (Half)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
11.71.73950.6350.7110.8480.85

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodResolution (High)Resolution (Low)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (All)R-Work (Depositor)R-Work (DCC)R-Free (Depositor)R-Free (DCC)Mean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTFREE R-VALUE1.767.38891935195299.6160.1860.18470.19850.22870.241518.337
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]
2.4440.462-1.805-0.776
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_6_deg15.986
r_dihedral_angle_3_deg11.727
r_dihedral_angle_2_deg8.355
r_dihedral_angle_1_deg6.173
r_lrange_it5.009
r_lrange_other4.794
r_scangle_it3.768
r_scangle_other3.766
r_scbond_it2.41
r_scbond_other2.375
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_6_deg15.986
r_dihedral_angle_3_deg11.727
r_dihedral_angle_2_deg8.355
r_dihedral_angle_1_deg6.173
r_lrange_it5.009
r_lrange_other4.794
r_scangle_it3.768
r_scangle_other3.766
r_scbond_it2.41
r_scbond_other2.375
r_mcangle_it1.997
r_mcangle_other1.997
r_angle_refined_deg1.533
r_mcbond_it1.406
r_mcbond_other1.406
r_angle_other_deg0.569
r_nbd_other0.226
r_nbd_refined0.219
r_symmetry_nbd_refined0.213
r_symmetry_nbd_other0.188
r_nbtor_refined0.182
r_symmetry_xyhbond_nbd_refined0.166
r_xyhbond_nbd_refined0.161
r_chiral_restr0.084
r_symmetry_nbtor_other0.074
r_symmetry_xyhbond_nbd_other0.05
r_bond_refined_d0.008
r_gen_planes_refined0.008
r_bond_other_d0.002
r_gen_planes_other0.001
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms6269
Nucleic Acid Atoms
Solvent Atoms1077
Heterogen Atoms52

Software

Software
Software NamePurpose
REFMACrefinement
DIALSdata reduction
xia2data scaling
REFMACphasing