2PRM

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

X-RAY DIFFRACTION

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, 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
3.62	65.99

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 90.05	α = 90
b = 90.05	β = 90
c = 123.2	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	3	19.5	99.5	0.25	6.85			11941		-3	18.753

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)
	3	4	100		0.346	5		6817

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	3	19.5	11938	597	100	0.193	0.19	0.253	RANDOM	17.718

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]
0.69	0.34		0.69		-1.03

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.969
r_dihedral_angle_3_deg	19.459
r_dihedral_angle_4_deg	16.759
r_dihedral_angle_1_deg	6.748
r_scangle_it	3.533
r_scbond_it	2.065
r_angle_refined_deg	1.787
r_mcangle_it	1.367
r_mcbond_it	0.79
r_nbtor_refined	0.319

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.969
r_dihedral_angle_3_deg	19.459
r_dihedral_angle_4_deg	16.759
r_dihedral_angle_1_deg	6.748
r_scangle_it	3.533
r_scbond_it	2.065
r_angle_refined_deg	1.787
r_mcangle_it	1.367
r_mcbond_it	0.79
r_nbtor_refined	0.319
r_symmetry_vdw_refined	0.249
r_nbd_refined	0.242
r_xyhbond_nbd_refined	0.169
r_symmetry_hbond_refined	0.166
r_chiral_restr	0.113
r_bond_refined_d	0.017
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2805
Nucleic Acid Atoms
Solvent Atoms	31
Heterogen Atoms	42

Software

Software
Software Name	Purpose
XSCALE	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
MAR345dtb	data collection
XDS	data reduction
CNS	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.