3CV9

Crystal structure of vitamin D hydroxylase cytochrome P450 105A1 (R73A/R84A mutant) in complex with 1alpha,25-dihydroxyvitamin D3

X-RAY DIFFRACTION

Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.2	283	26% PEGMME 2000, 0.1M Bis-tris, 0.2M sodium chlorife, pH 6.2, VAPOR DIFFUSION, SITTING DROP, temperature 283K

Crystal Properties
Matthews coefficient	Solvent content
2.24	45.07

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 53.315	α = 90
b = 53.659	β = 90
c = 140.605	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	90	CCD	ADSC QUANTUM 210	mirrors	2007-06-28	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SPRING-8 BEAMLINE BL44B2	1.00	SPring-8	BL44B2

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	1.7	20	98.5	0.04	28.8	7.1	45139	45139		-3	21.6

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.7	1.76	87.1		0.337	5.1	5.3	3913

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	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 2ZBZ	1.7	20	42422	2266	98.78	0.20177	0.19907	0.25347	RANDOM	23.075

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]
1.18			-1.45		0.27

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.629
r_dihedral_angle_4_deg	18.279
r_dihedral_angle_3_deg	13.304
r_dihedral_angle_1_deg	5.634
r_scangle_it	2.994
r_scbond_it	2.094
r_angle_refined_deg	1.554
r_mcangle_it	1.316
r_mcbond_it	0.849
r_nbtor_refined	0.307

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.629
r_dihedral_angle_4_deg	18.279
r_dihedral_angle_3_deg	13.304
r_dihedral_angle_1_deg	5.634
r_scangle_it	2.994
r_scbond_it	2.094
r_angle_refined_deg	1.554
r_mcangle_it	1.316
r_mcbond_it	0.849
r_nbtor_refined	0.307
r_nbd_refined	0.212
r_symmetry_hbond_refined	0.181
r_xyhbond_nbd_refined	0.169
r_symmetry_vdw_refined	0.152
r_chiral_restr	0.108
r_bond_refined_d	0.014
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3150
Nucleic Acid Atoms
Solvent Atoms	463
Heterogen Atoms	73

Software

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

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.