2PRL

The structures of apo- and inhibitor bound human dihydroorotate dehydrogenase reveal conformational flexibility within the inhibitor binding site

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1D3G

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.8	293	DROPS WERE FORMED BY MIXING EQUAL AMOUNTS OF 18-24 MG/ML PROTEIN IN 100 MM HEPES PH 7.0, 400 MM NACL, 30% GLYCEROL, 1 MM EDTA AND 10 MM N,N- DIMETHYLUNDECYLAMIN-N-OXIDE (C11DAO) WITH A PRECIPITANT SOLUTION OF 0.1 M ACETATE PH 4.8 40 MM C11DAO, 20.8 MM N,-DIMETHYLDECYLAMINE-N-OXIDE (DDAO), 2 MM DIHYDROOROTATE (DHO) THE HANGING DROPS WERE INCUBATED AGAINST 0.5 ML RESERVOIR OF 0.1 M ACETATE PH 4.8, 1.6-2.2 M AMMONIUM SULFATE AND 30% GLYCEROL., VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
3.61	65.94

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 90.41	α = 90
b = 90.41	β = 90
c = 122.07	γ = 120

Symmetry
Space Group	P 32 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	IMAGE PLATE	MAR scanner 345 mm plate	mirrors	2004-04-27	M	SINGLE WAVELENGTH
2	1	x-ray		M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	MAX II BEAMLINE I711	1.092	MAX II	I711

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	2.1	18.83	98	0.114	12.17			33570		-3	22.487

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	2.1	2.2	99.5		0.327	5.8		4367

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	1d3g	2.1	18.83	31888	1678		0.16907	0.16771	0.19441	RANDOM	10.597

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	0.08		0.16		-0.25

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.984
r_dihedral_angle_4_deg	18.191
r_dihedral_angle_3_deg	12.664
r_dihedral_angle_1_deg	5.696
r_scangle_it	2.081
r_angle_refined_deg	1.298
r_scbond_it	1.27
r_mcangle_it	0.755
r_mcbond_it	0.487
r_nbtor_refined	0.306
r_symmetry_vdw_refined	0.208
r_nbd_refined	0.191
r_symmetry_hbond_refined	0.135
r_xyhbond_nbd_refined	0.126
r_chiral_restr	0.071
r_bond_refined_d	0.008
r_gen_planes_refined	0.003
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
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	2805
Nucleic Acid Atoms
Solvent Atoms	231
Heterogen Atoms	94

Software

Software
Software Name	Purpose
REFMAC	refinement
REFMAC	refinement
REFMAC	refinement
MAR345dtb	data collection
XDS	data reduction
XSCALE	data scaling
CNS	phasing