3BRQ

Crystal structure of the Escherichia coli transcriptional repressor ascG

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.5	295	0.2M Ammonium sulfate, 0.1M Bis-Tris pH 5.5, 30% PEG MME 2000, 2% Sucrose, VAPOR DIFFUSION, HANGING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.02	39.16

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 62.229	α = 90
b = 65.446	β = 90
c = 130.706	γ = 90

Symmetry
Space Group	P 21 21 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 315	Mirrors	2006-12-04	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 19-ID	0.97935	APS	19-ID

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	50	96.2	0.096	37.6	7	66550	63778

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	2.07	78		0.304	6.6	5.5	5357

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	2	45.08	35462	35462	1760	96.9	0.18875	0.18875	0.1856	0.24912	RANDOM	32.396

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]
-0.2			-0.12		0.32

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.56
r_dihedral_angle_4_deg	19.924
r_dihedral_angle_3_deg	16.863
r_dihedral_angle_1_deg	6.032
r_scangle_it	4.762
r_scbond_it	3.021
r_mcangle_it	1.806
r_angle_refined_deg	1.654
r_mcbond_it	1.013
r_nbtor_refined	0.311
r_nbd_refined	0.224
r_xyhbond_nbd_refined	0.192
r_symmetry_hbond_refined	0.173
r_symmetry_vdw_refined	0.152
r_chiral_restr	0.112
r_bond_refined_d	0.018
r_gen_planes_refined	0.007
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	4232
Nucleic Acid Atoms
Solvent Atoms	351
Heterogen Atoms	23

Software

Software
Software Name	Purpose
REFMAC	refinement
ADSC	data collection
HKL-2000	data reduction
HKL-2000	data scaling
HKL-3000	phasing