5LL8

Human Carbonic Anhydrase II in complex with aliphatic Benzenesulfonamide inhibitor.

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.8	291	2.0 uL of protein solution (10.5 mg/mL in 50 mM Tris pH=7.8) were mixed with 2.0 uL of the well solution (2.7 M (NH4)2SO4, 100 mM Tris, pH=7.8, saturated with PCMB) and placed as hanging drop. Crystals appeared after several days. The crystals were soaked in 3.0 M (NH4)2SO4, 100 mM Tris, pH=7.8, saturated with inhibitor) for 1 day.

Crystal Properties
Matthews coefficient	Solvent content
2.1	41.3

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 42.28	α = 90
b = 41.45	β = 104.22
c = 71.98	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	113	PIXEL	DECTRIS PILATUS 2M		2015-10-06	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ELETTRA BEAMLINE 5.2R	1	ELETTRA	5.2R

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym I (Observed)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1	1.03	41.45	95.8	0.051	13.1	3.8		114562

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.03	1.09	75.9		0.389	2.3	2.8

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	3KS3	1.03	40.984	1.36	114537	2127	95.88	0.1208	0.1204	0.1432

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
Key	Refinement Restraint Deviation
f_dihedral_angle_d	13.729
f_angle_d	1.02
f_chiral_restr	0.082
f_plane_restr	0.008
f_bond_d	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2015
Nucleic Acid Atoms
Solvent Atoms	278
Heterogen Atoms	50

Software

Software
Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XDS	data scaling
PHASER	phasing

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.