5JEG

Human carbonic anhydrase II (V121I) complexed with benzo[d]thiazole-2-sulfonamide


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP277.15We soaked monoclinic crystals of HCAII with BTA (EVF) by carrying out the following steps: (i) We prepared soaking solutions containing 1.32 M sodium citrate, 1 mM ZnSO4, 100 mM Tris-HCl (pH 7.8), and 5 mM ligand. (ii) We combined 4 uL of soaking solution and 1-2 crystals of HCAII within a drop on the surface of a reservoir cover (EasyXtal CrystalSupport, Qiagen). (iii) To a clear plastic reservoir in a 15-reservoir plate (EasyXtal, Qiagen), we added 1 mL of soaking solution (without ligand present). We attached the reservoir cover to the reservoir and left the entire setup at 4 deg C for 1 week.
Crystal Properties
Matthews coefficientSolvent content
2.0941.07

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 42.43α = 90
b = 41.48β = 104.64
c = 72.64γ = 90
Symmetry
Space GroupP 1 21 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC QUANTUM 315r2015-04-15MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONALS BEAMLINE 8.2.21.1ALS8.2.2

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (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
11.1935.72298.251.341.9151070

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodResolution (High)Resolution (Low)Cut-off Sigma (F)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTFREE R-VALUE1.1935.7221.34151070387598.250.13280.13220.1561
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]
RMS Deviations
KeyRefinement Restraint Deviation
f_dihedral_angle_d13.761
f_angle_d2.214
f_chiral_restr0.121
f_bond_d0.016
f_plane_restr0.01
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms2091
Nucleic Acid Atoms
Solvent Atoms396
Heterogen Atoms

Software

Software
Software NamePurpose
PHENIXrefinement
xia2data reduction
xia2data scaling
PHASERphasing