4BJH

Crystal Structure of the Aquifex Reactor Complex Formed by Dihydroorotase (H180A, H232A) with Dihydroorotate and Aspartate Transcarbamoylase with N-(phosphonacetyl)-L-aspartate (PALA)

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5		THE CRYSTALS WERE GROWN AT ROOM TEMPERATURE IN HANGING-DROPS. THE HETERO DODECAMER WAS BUFFER EXCHANGED INTO 10 MM HEPES, 1 MM TCEP PH 7.5, AT A FINAL PROTEIN CONCENTRATION OF 3.0 MG/ML. DHO-ATC SOLUTION (3-6 UL) WAS MIXED WITH 1 UL OF RESERVOIR SOLUTION (30% ETHYLENE GLYCOL) FOLLOWED BY 10% OF THE DROP VOLUME (V/V) OF 100 MM BARIUM CHLORIDE. THE FINAL CRYSTALLIZATION PH WAS 6.3.

Crystal Properties
Matthews coefficient	Solvent content
3.17	61.2

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 157.152	α = 90
b = 157.152	β = 90
c = 233.244	γ = 120

Symmetry
Space Group	H 3 2

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	MARRESEARCH MAR300	BE LENSES	2009-05-29	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 21-ID-G		APS	21-ID-G

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	77.85	99.9	0.1	16.2	8.8		53365			41.7

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	2.32	100		0.76	2.3	8.8

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 3D6N	2.2	77.85	53365	2846	99.94	0.16282	0.16066	0.20304	RANDOM	41.256

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]
-0.27	-0.14		-0.27		0.41

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.837
r_dihedral_angle_4_deg	23.094
r_dihedral_angle_3_deg	15.736
r_dihedral_angle_1_deg	6.491
r_scangle_it	4.184
r_scbond_it	2.588
r_angle_refined_deg	1.558
r_mcangle_it	1.423
r_mcbond_it	0.738
r_chiral_restr	0.104
r_bond_refined_d	0.016
r_gen_planes_refined	0.008
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_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5622
Nucleic Acid Atoms
Solvent Atoms	445
Heterogen Atoms	84

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALEPACK	data scaling
ARP/wARP	phasing