2HAX

Crystal structure of Bacillus caldolyticus cold shock protein in complex with hexathymidine

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.6	293.15	35% 2-methyl-2,4-pentanediol, 0.1 M sodium acetate pH 4.6, 0.02 M CaCl2, VAPOR DIFFUSION, HANGING DROP, temperature 293.15K

Crystal Properties
Matthews coefficient	Solvent content
2.06	40.36

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 74.34	α = 90
b = 64.89	β = 90
c = 31.2	γ = 90

Symmetry
Space Group	P 21 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	110	CCD	MAR CCD 165 mm	mirrors	2003-10-27	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	BESSY BEAMLINE 14.1	0.9184	BESSY	14.1

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	1.29	19.5	97.9	0.066	14.68	6.3	38879	38068	-3	-3	16.166

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)
	1.29	1.5	95.1		0.239	6.1	6.2	13269

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	MOLECULAR REPLACEMENT	THROUGHOUT	PDB entry 1C9O	1.29	19.5	38036	36128	1908	95	0.132	0.132	0.13	0.162	RANDOM	10.87

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]
-0.37			-0.25		0.62

RMS Deviations
Key	Refinement Restraint Deviation
r_sphericity_free	14.831
r_sphericity_bonded	6.33
r_scangle_it	5.166
r_dihedral_angle_1_deg	4.346
r_scbond_it	3.878
r_mcangle_it	3.158
r_mcbond_it	2.177
r_angle_refined_deg	1.567
r_rigid_bond_restr	1.479
r_angle_other_deg	0.98
r_symmetry_vdw_other	0.309
r_nbd_other	0.263
r_nbd_refined	0.203
r_symmetry_vdw_refined	0.203
r_symmetry_hbond_refined	0.165
r_xyhbond_nbd_refined	0.135
r_chiral_restr	0.096
r_nbtor_other	0.086
r_bond_refined_d	0.018
r_gen_planes_other	0.013
r_gen_planes_refined	0.011
r_bond_other_d	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1117
Nucleic Acid Atoms	246
Solvent Atoms	250
Heterogen Atoms	1

Software

Software
Software Name	Purpose
XSCALE	data scaling
AMoRE	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
MAR345	data collection
XDS	data scaling