3GW9

Crystal structure of sterol 14-alpha demethylase (CYP51) from Trypanosoma brucei bound to an inhibitor N-(1-(2,4-dichlorophenyl)-2-(1H-imidazol-1-yl)ethyl)-4-(5-phenyl-1,3,4-oxaziazol-2-yl)benzamide

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3G1Q	pdb entry 3G1Q

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.3	298	PEG 3350, POTASSIUM PHOSPHATE, n-TETRADECYL-BETA-D-MALTOSIDE, SODIUM CHLORIDE, N-(1-(2,4-dichlorophenyl)-2-(1H-imidazol-1-yl)ethyl)-4-(5-phenyl-1,3,4-oxaziazol-2-yl)benzamide , pH 7.3, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.41	49.03

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 60.078	α = 74.74
b = 79.113	β = 79.13
c = 115.998	γ = 68.57

Symmetry
Space Group	P 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	CCD	MARMOSAIC 225 mm CCD	Be Lenses/Diamond Laue Mono	2009-02-16	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 21-ID-F	0.97872	APS	21-ID-F

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	1.87	37.48	96.99	0.05	28	3.9	149012	144527	1.8	1.8	29.5

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)
	1.87	1.9	91.7		0.603	1.8	3.5

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	pdb entry 3G1Q	1.87	37.48	1.8	1.8	149012	144527	7635	96.99	0.19111	0.18861	0.2383	RANDOM	29.112

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]
-0.16	0.06		-0.23	0.11	0.28

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.979
r_dihedral_angle_4_deg	17.982
r_dihedral_angle_3_deg	15.427
r_sphericity_free	10.378
r_dihedral_angle_1_deg	6.043
r_scangle_it	4.498
r_sphericity_bonded	3.816
r_scbond_it	2.987
r_mcangle_it	2.12
r_angle_refined_deg	1.549
r_rigid_bond_restr	1.51
r_mcbond_it	1.355
r_angle_other_deg	0.943
r_mcbond_other	0.628
r_chiral_restr	0.09
r_bond_refined_d	0.017
r_gen_planes_refined	0.007
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	14273
Nucleic Acid Atoms
Solvent Atoms	691
Heterogen Atoms	312

Software

Software
Software Name	Purpose
HKL-2000	data collection
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling