2HEK

Crystal structure of O67745, a hypothetical protein from Aquifex aeolicus at 2.0 A resolution.

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.2	293	10 mg/ml protein was mixed with 1:1 ratio with reservoir consisted of: 200 mM NaCl, 100 mM Phosphate-Citrate buffer, 10% PEG 3000, 100 mM NaBr, 5% Glycerol, pH 4.2, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
3.18	61.34

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 107.687	α = 90
b = 144.413	β = 90
c = 144.677	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 210	Divergence: 3.0(h)x0.35(v) mrad Spot size: 0.140(h)x0.150(v) mm	2004-06-26	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.1	1.0	ALS	8.2.1

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	1.997	43	95.7	0.044	21.4	4.7	80115	76300	1	1	44

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.997	2.07	95.7		0.52	0.518	2.5	3.8	8061

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	1.997	12	75574	71767	3807	99.35	0.17686	0.17686	0.17455	0.2201	RANDOM	46.142

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]
2.27			-1.03		-1.24

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.445
r_dihedral_angle_4_deg	18.001
r_dihedral_angle_3_deg	14.866
r_sphericity_free	6.215
r_rigid_bond_restr	5.698
r_scangle_it	5.617
r_dihedral_angle_1_deg	5.416
r_mcangle_it	5.133
r_scbond_it	4.995
r_sphericity_bonded	4.603
r_mcbond_it	4.045
r_angle_refined_deg	1.452
r_nbtor_refined	0.31
r_symmetry_vdw_refined	0.219
r_nbd_refined	0.215
r_symmetry_hbond_refined	0.209
r_xyhbond_nbd_refined	0.154
r_chiral_restr	0.105
r_metal_ion_refined	0.086
r_bond_refined_d	0.015
r_gen_planes_refined	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6218
Nucleic Acid Atoms
Solvent Atoms	355
Heterogen Atoms	132

Software

Software
Software Name	Purpose
REFMAC	refinement
PHENIX	phasing