8QQA

human carbonic anhydrase II in complex with Bithionol

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	4FIK

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	296	1.5 M sodium citrate, 50 mM Tris pH 8.0

Crystal Properties
Matthews coefficient	Solvent content
2.1	41.33

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 42.38	α = 90
b = 41.36	β = 104.558
c = 72.38	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	100	PIXEL	DECTRIS PILATUS 6M		2022-03-23	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ELETTRA BEAMLINE 11.2C	1.00	ELETTRA	11.2C

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)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1	1.346	70.06	92.2	0.07	0.077	0.997	13.42	5.35		49852

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)	Redundancy	Number Unique Reflections (All)
1	1.35	1.38	58.7		0.622	0.711	0.715	2.28	4.1

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	NONE	1.346	70.056	49851	2473	92.269	0.118	0.1162	0.1641	17.578

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]
0.308		-0.194	1.974		-1.922

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.948
r_dihedral_angle_4_deg	24.102
r_dihedral_angle_3_deg	11.98
r_dihedral_angle_1_deg	6.969
r_scangle_it	5.056
r_scangle_other	5.055
r_scbond_it	4.714
r_scbond_other	4.712
r_lrange_it	4.634
r_lrange_other	4.515
r_rigid_bond_restr	3.793
r_mcangle_other	2.771
r_mcangle_it	2.763
r_mcbond_it	2.382
r_mcbond_other	2.342
r_angle_refined_deg	1.941
r_angle_other_deg	1.542
r_symmetry_nbd_refined	0.236
r_nbd_refined	0.229
r_nbd_other	0.206
r_symmetry_nbd_other	0.195
r_symmetry_xyhbond_nbd_refined	0.191
r_nbtor_refined	0.18
r_xyhbond_nbd_refined	0.145
r_chiral_restr	0.114
r_symmetry_nbtor_other	0.09
r_metal_ion_refined	0.074
r_symmetry_xyhbond_nbd_other	0.057
r_bond_refined_d	0.015
r_gen_planes_refined	0.012
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2050
Nucleic Acid Atoms
Solvent Atoms	242
Heterogen Atoms	43

Software

Software
Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling
REFMAC	phasing