2FPR

Crystal structure the N-terminal domain of E. coli HisB. Apo Mg model.

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8.5	293	25%(w/v) PEG3350, 0.2M MgCl2, 0.1M Tris-HCl, pH 8.5, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.47	50.21

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 53.256	α = 90
b = 131.962	β = 90
c = 106.14	γ = 90

Symmetry
Space Group	C 2 2 21

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	ADSC QUANTUM 4	Mirrors	2005-06-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X8C	0.9202	NSLS	X8C

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	50	99.9	0.072	11.1	3.7	41547	39463

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	1.7	1.76	99.9		0.514	2.9	3.6

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	SAD	THROUGHOUT	1.7	50	41547	39463	2084	99.96	0.1904	0.19035	0.18877	0.21979	RANDOM	16.445

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]
-0.22			-0.65		0.87

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.415
r_dihedral_angle_4_deg	18.987
r_dihedral_angle_3_deg	11.566
r_dihedral_angle_1_deg	5.95
r_scangle_it	2.833
r_scbond_it	1.741
r_angle_refined_deg	1.217
r_mcangle_it	1.068
r_mcbond_it	0.567
r_nbtor_refined	0.308
r_nbd_refined	0.202
r_symmetry_vdw_refined	0.202
r_metal_ion_refined	0.182
r_symmetry_hbond_refined	0.127
r_xyhbond_nbd_refined	0.112
r_chiral_restr	0.083
r_bond_refined_d	0.009
r_gen_planes_refined	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2533
Nucleic Acid Atoms
Solvent Atoms	440
Heterogen Atoms	12

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
SHELXD	phasing