2G42

Crystal structure of a putative nucleic acid binding protein (tm0693) from thermotoga maritima at 2.28 A resolution

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP, NANODROP	5.1	277	0.2M CaCl2, 20.0% PEG-3350, No Buffer, pH 5.1, VAPOR DIFFUSION, SITTING DROP, NANODROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.18	43.23

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 41.174	α = 90
b = 26.761	β = 97.23
c = 73.221	γ = 90

Symmetry
Space Group	P 1 21 1

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		2005-12-15	M	SINGLE WAVELENGTH

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

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	2.28	40.859	94.9	0.091	12.72	6.777		7150			42.374

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	2.28	2.35	66.4		0.475	2.73	3.398

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	SAD	THROUGHOUT	2.28	40.8	7134	330	94.84	0.206	0.203	0.251	RANDOM	42.727

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]
2.29		-0.14	1.32		-3.65

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.245
r_dihedral_angle_4_deg	18.512
r_dihedral_angle_3_deg	14.613
r_scangle_it	5.628
r_dihedral_angle_1_deg	4.451
r_scbond_it	3.805
r_mcangle_it	1.974
r_mcbond_it	1.242
r_angle_refined_deg	0.92
r_angle_other_deg	0.713
r_mcbond_other	0.285
r_nbd_refined	0.188
r_symmetry_vdw_other	0.169
r_nbtor_refined	0.162
r_nbd_other	0.158
r_xyhbond_nbd_refined	0.157
r_symmetry_vdw_refined	0.15
r_symmetry_hbond_refined	0.102
r_nbtor_other	0.08
r_chiral_restr	0.052
r_bond_refined_d	0.008
r_gen_planes_refined	0.002
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1236
Nucleic Acid Atoms
Solvent Atoms	72
Heterogen Atoms	1

Software

Software
Software Name	Purpose
REFMAC	refinement
XSCALE	data scaling
PDB_EXTRACT	data extraction
XDS	data reduction
SOLVE	phasing