Crystal structure of a sialic acid binding protein, R404A 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, 3.8M ammonium sulfate, pH 5.4
Crystal Properties
Matthews coefficientSolvent content
2.1241.92

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 78.255α = 90
b = 61.146β = 106.127
c = 88.873γ = 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)Rpim 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
11.79785.376920.17220.18580.06920.9937.787.1155625
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Rrim I (All)Rpim I (All)CC (Half)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
1.7971.85590.10.59310.64230.24350.8753.026.582781

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-VALUE1.79785.37655625271573.8140.1980.19470.20480.25250.25679.143
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]
0.534-0.011-0.223-0.262
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_6_deg15.136
r_dihedral_angle_3_deg12.274
r_dihedral_angle_2_deg7.707
r_dihedral_angle_1_deg6.436
r_lrange_it4.312
r_lrange_other3.962
r_scangle_it2.318
r_scangle_other2.316
r_angle_refined_deg1.548
r_scbond_it1.416
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_6_deg15.136
r_dihedral_angle_3_deg12.274
r_dihedral_angle_2_deg7.707
r_dihedral_angle_1_deg6.436
r_lrange_it4.312
r_lrange_other3.962
r_scangle_it2.318
r_scangle_other2.316
r_angle_refined_deg1.548
r_scbond_it1.416
r_scbond_other1.412
r_mcangle_it1.363
r_mcangle_other1.363
r_mcbond_it0.833
r_mcbond_other0.831
r_angle_other_deg0.556
r_nbd_refined0.217
r_xyhbond_nbd_refined0.205
r_symmetry_nbd_refined0.194
r_symmetry_nbd_other0.191
r_nbd_other0.19
r_nbtor_refined0.189
r_symmetry_xyhbond_nbd_refined0.181
r_chiral_restr0.08
r_symmetry_nbtor_other0.076
r_ncsr_local_group_10.063
r_symmetry_xyhbond_nbd_other0.016
r_bond_refined_d0.008
r_gen_planes_refined0.008
r_bond_other_d0.001
r_gen_planes_other0.001
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms6248
Nucleic Acid Atoms
Solvent Atoms1013
Heterogen Atoms52

Software

Software
Software NamePurpose
REFMACrefinement
autoPROCdata reduction
autoPROCdata scaling
REFMACphasing