3G1Q

Crystal structure of sterol 14-alpha demethylase (CYP51) from Trypanosoma brucei in ligand free state

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2VE4	PDB ENTRY 2VE4

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 , pH 7.3, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.45	49.88

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 59.823	α = 74.21
b = 79.874	β = 81.56
c = 117.146	γ = 68.49

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	2008-11-01	M	SINGLE WAVELENGTH
2	1	x-ray	100	CCD	MARMOSAIC 300 mm CCD		2008-11-01	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
2	SYNCHROTRON	APS BEAMLINE 21-ID-D	1.73892	APS	21-ID-D

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	1.89	30	97.8	0.06	18.5	4	153658	150278		3

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.89	1.97	96.7		0.472	0.472	3.1	3.8

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	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	combination of MR and Fe-SAD	THROUGHOUT	PDB ENTRY 2VE4	1.89	28.62	146460	142726	7519	97.45	0.19716	0.19522	0.23423	RANDOM	36.415

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]
0.03	-0.2	0.14	0.02	-0.01	0.06

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.719
r_dihedral_angle_4_deg	20.034
r_dihedral_angle_3_deg	15.951
r_dihedral_angle_1_deg	6.346
r_scangle_it	5.553
r_scbond_it	3.583
r_mcangle_it	2.196
r_angle_refined_deg	1.894
r_mcbond_it	1.32
r_chiral_restr	0.149
r_bond_refined_d	0.026
r_gen_planes_refined	0.011
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	14192
Nucleic Acid Atoms
Solvent Atoms	494
Heterogen Atoms	172

Software

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