2O97

Crystal Structure of E. coli HU heterodimer

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		8.5	298	0.1M Tris-HCl, 0.01M nickel chloride, 20% PEG-MME2000, 5% glycerol, pH 8.5, EVAPORATION, temperature 298K, pH 8.50

Crystal Properties
Matthews coefficient	Solvent content
2.79	55.94

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 82.915	α = 90
b = 82.915	β = 90
c = 61.048	γ = 90

Symmetry
Space Group	I 41

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	200	IMAGE PLATE	MAR scanner 345 mm plate		2004-10-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU

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	2.4	20	92.8	0.035	28.3	6.23		7084		-3

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	2.4	2.49	64.7		0.362

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	2.45	20	7084	361	92.8	0.228	0.226	0.264	RANDOM	51.81

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]
-2.25			-2.25		4.5

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.125
r_dihedral_angle_3_deg	21.899
r_dihedral_angle_4_deg	16.137
r_dihedral_angle_1_deg	5.648
r_scangle_it	2.924
r_scbond_it	1.84
r_angle_refined_deg	1.494
r_mcangle_it	1.128
r_mcbond_it	0.675
r_nbtor_refined	0.304
r_symmetry_vdw_refined	0.258
r_xyhbond_nbd_refined	0.245
r_nbd_refined	0.241
r_symmetry_hbond_refined	0.241
r_chiral_restr	0.088
r_bond_refined_d	0.016
r_gen_planes_refined	0.005
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	1028
Nucleic Acid Atoms
Solvent Atoms	26
Heterogen Atoms	2

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
MOLREP	phasing
DM	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction