3KHM

Crystal structure of sterol 14alpha-demethylase (CYP51) from Trypanosoma cruzi in complex with inhibitor fluconazole

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3K1O	PDB entry 3K1O

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.2	298	PEG 3350, POTASSIUM FORMATE, SODIUM CHLORIDE, pH 7.2, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.37	48.2

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 62.591	α = 90
b = 62.591	β = 90
c = 222.248	γ = 120

Symmetry
Space Group	P 31 2 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 300 mm CCD		2005-12-14	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-ID	0.97928	APS	22-ID

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	2.85	50	96	0.06	24.8	3.6	12689	12181	1.4	1.4	48.4

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	2.85	2.95	95.9		0.502	1.4	3.3	2136

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	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 3K1O	2.85	28.83	1.4	11830	11141	593	94.17	0.22928	0.22681	0.27987	RANDOM	43.49

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]
-0.01			-0.01		0.01

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	28.392
r_dihedral_angle_3_deg	13.941
r_dihedral_angle_4_deg	12.307
r_dihedral_angle_1_deg	4.74
r_scangle_it	3.394
r_scbond_it	2.069
r_mcangle_it	1.393
r_mcbond_it	0.722
r_angle_refined_deg	0.365
r_chiral_restr	0.025

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	28.392
r_dihedral_angle_3_deg	13.941
r_dihedral_angle_4_deg	12.307
r_dihedral_angle_1_deg	4.74
r_scangle_it	3.394
r_scbond_it	2.069
r_mcangle_it	1.393
r_mcbond_it	0.722
r_angle_refined_deg	0.365
r_chiral_restr	0.025
r_gen_planes_refined	0.004
r_bond_refined_d	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3517
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	65

Software

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

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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 R01GM157729.