Crystal Structure of the Peptide-binding Protein NikA from Streptococcus agalactiae in Complex with Zinc, L-Histidine and Tris buffer.


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 4D7R 

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, SITTING DROP8.5292Protein: 12.9 mg/ml, 10mM HEPES (pH 7.2) , 1mM TCEP, 2% Glycerol, 5mM Imidazole; Screen: Classics II (D9), 0.1M Tris (pH 8.5), 25% (w/v) PEG 3350; Cryo: Reservoir.
Crystal Properties
Matthews coefficientSolvent content
2.244.2

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 75.495α = 90
b = 58.191β = 106.39
c = 119.271γ = 90
Symmetry
Space GroupP 1 21 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100PIXELDECTRIS EIGER2 X 9M2024-10-15MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONNSLS-II BEAMLINE 17-ID-10.92020NSLS-II17-ID-1

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)R Sym I (Observed)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
11.8301000.1820.1820.0760.991106.691954-315.6
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)R-Sym I (Observed)Rpim I (All)CC (Half)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
11.81.831000.7720.7720.3240.3662.36.6

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-Work (Depositor)R-Work (DCC)R-Free (Depositor)R-Free (DCC)R-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUT1.829.6187171476199.710.196470.194170.20260.238170.2436RANDOM20.486
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]
0.34-0.47-0.860.69
RMS Deviations
KeyRefinement Restraint Deviation
r_long_range_B_refined5.928
r_long_range_B_other5.743
r_dihedral_angle_3_deg5.173
r_scangle_other3.781
r_mcangle_it2.613
r_mcangle_other2.613
r_dihedral_angle_1_deg2.459
r_scbond_it2.309
r_scbond_other2.309
r_mcbond_it1.655
RMS Deviations
KeyRefinement Restraint Deviation
r_long_range_B_refined5.928
r_long_range_B_other5.743
r_dihedral_angle_3_deg5.173
r_scangle_other3.781
r_mcangle_it2.613
r_mcangle_other2.613
r_dihedral_angle_1_deg2.459
r_scbond_it2.309
r_scbond_other2.309
r_mcbond_it1.655
r_mcbond_other1.655
r_angle_refined_deg1.521
r_dihedral_angle_2_deg1.146
r_angle_other_deg0.518
r_chiral_restr0.084
r_gen_planes_refined0.015
r_gen_planes_other0.012
r_bond_refined_d0.003
r_bond_other_d0.001
r_dihedral_angle_4_deg
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_scangle_it
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms8147
Nucleic Acid Atoms
Solvent Atoms1100
Heterogen Atoms40

Software

Software
Software NamePurpose
REFMACrefinement
HKL-3000data reduction
HKL-3000data scaling
PHASERphasing