2ES2

Crystal Structure Analysis of the Bacillus Subtilis Cold Shock Protein Bs-CspB in Complex with Hexathymidine

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	293	0.2M calcium acetate 18% (w/v) PEG 8000, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.83	56.59

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 49.03	α = 90
b = 53.17	β = 90
c = 76.94	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	110	CCD	MARRESEARCH	mirrors	2003-10-27	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	BESSY BEAMLINE 14.1	0.91840	BESSY	14.1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	1.78	19	98.5	0.065	0.059	12.63	5.6	9870	9870			37.15

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	1.78	2	96.3	96.3	0.426	0.385	3.45	5.5	2830

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 1CSP	1.78	19	9861	9861	473	99	0.19	0.19	0.189	0.223	RANDOM	37.563

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]
-1.72			4.58		-2.86

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.141
r_dihedral_angle_4_deg	18.103
r_dihedral_angle_3_deg	14.412
r_dihedral_angle_1_deg	5.562
r_scangle_it	4.719
r_scbond_it	4.065
r_mcangle_it	2.642
r_angle_refined_deg	1.894
r_mcbond_it	1.846
r_angle_other_deg	1.083
r_mcbond_other	0.563
r_symmetry_vdw_other	0.255
r_symmetry_vdw_refined	0.244
r_nbd_refined	0.227
r_metal_ion_refined	0.207
r_xyhbond_nbd_refined	0.187
r_nbd_other	0.177
r_symmetry_hbond_refined	0.16
r_chiral_restr	0.107
r_nbtor_other	0.095
r_bond_refined_d	0.015
r_gen_planes_refined	0.008
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	511
Nucleic Acid Atoms	101
Solvent Atoms	63
Heterogen Atoms	2

Software

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