3OHE

Crystal structure of a Histidine triad protein (Maqu_1709) from Marinobacter aquaeolei VT8 at 1.20 A resolution

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	277	0.1600M Ca(OAc)2, 20.0000% Glycerol, 14.4000% PEG-8000, 0.1M Cacodylate pH 6.5, NANODROP, VAPOR DIFFUSION, SITTING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.28	46.01

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 36.024	α = 90
b = 80.485	β = 90
c = 99.445	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	MARMOSAIC 325 mm CCD	Flat collimating mirror, toroid focusing mirror	2009-11-05	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-2	0.91837,0.97954,0.97936	SSRL	BL9-2

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	1.2	27.426	98.7	0.057	9.16			90934		-3	8.542

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	1.2	1.24	96.2		0.52	1.8

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	MAD	THROUGHOUT	1.2	27.426	90865	4555	99.59	0.1294	0.1281	0.1535	RANDOM	13.075

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]
0.14			-0.03		-0.11

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.724
r_dihedral_angle_3_deg	10.357
r_sphericity_free	8.296
r_dihedral_angle_4_deg	7.963
r_dihedral_angle_1_deg	6.367
r_scangle_it	5.825
r_scbond_it	4.152
r_sphericity_bonded	3.687
r_mcangle_it	2.883
r_mcbond_it	2.095
r_rigid_bond_restr	1.726
r_angle_refined_deg	1.575
r_mcbond_other	1.307
r_angle_other_deg	0.912
r_chiral_restr	0.093
r_bond_refined_d	0.013
r_gen_planes_refined	0.008
r_gen_planes_other	0.003
r_bond_other_d	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2184
Nucleic Acid Atoms
Solvent Atoms	429
Heterogen Atoms	27

Software

Software
Software Name	Purpose
SHELX	phasing
REFMAC	refinement
XSCALE	data scaling
PDB_EXTRACT	data extraction
XDS	data reduction
SHELXD	phasing
autoSHARP	phasing