2I5L

Crystal structure of Bacillus subtilis Cold Shock Protein variant Bs-CspB M1R/E3K/K65I

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8.5	293.15	protein solution: 20 mM TRIS pH 7.5, 50 mM sodium chloride, 3 mM magnesium chloride, 20.4 mg/ml protein. crystallization buffer: 25 % PEG 3350, 0.2 M sodium carbonate, 0.1 M TRIS HCl pH 8.5. crystallization setup: 0.8 microliter protein solution:0.8 microliter reservoir solution, VAPOR DIFFUSION, SITTING DROP, temperature 293.15K

Crystal Properties
Matthews coefficient	Solvent content
2.89	57.48

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 55.5	α = 90
b = 55.5	β = 90
c = 55.47	γ = 90

Symmetry
Space Group	P 43 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	2005-07-18	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	BESSY BEAMLINE 14.2	0.9537	BESSY	14.2

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	2.5	19.2	98.2	0.088	20.14	9.72	3258	3223			49.578

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)
	2.5	2.6	98.6		0.58	2.8	9.36	351

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-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	pdb entry 1CSQ	2.55	18.5	3096	3071	134	99.2	0.227	0.227	0.244	RANDOM	49.449

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]
0.67			0.67		-1.33

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.264
r_dihedral_angle_3_deg	16.89
r_dihedral_angle_4_deg	9.925
r_dihedral_angle_1_deg	5.749
r_scangle_it	5.473
r_scbond_it	4.645
r_mcangle_it	2.868
r_mcbond_it	2.375
r_angle_refined_deg	1.717
r_angle_other_deg	0.927
r_mcbond_other	0.312
r_symmetry_vdw_other	0.306
r_nbd_refined	0.216
r_nbd_other	0.215
r_nbtor_refined	0.193
r_symmetry_vdw_refined	0.146
r_xyhbond_nbd_refined	0.139
r_chiral_restr	0.112
r_nbtor_other	0.102
r_symmetry_hbond_refined	0.057
r_bond_refined_d	0.016
r_gen_planes_refined	0.007
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	527
Nucleic Acid Atoms
Solvent Atoms	10
Heterogen Atoms

Software

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