2I5M

Crystal structure of Bacillus subtilis cold shock protein CspB variant A46K S48R

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	BESSY BEAMLINE 14.2
Synchrotron site	BESSY
Beamline	14.2
Temperature [K]	110
Detector technology	CCD
Collection date	2005-07-18
Detector	MAR CCD 165 mm
Wavelength(s)	0.9537
Spacegroup name	P 32 2 1
Unit cell lengths	58.627, 58.627, 46.798
Unit cell angles	90.00, 90.00, 120.00

Refinement procedure

Resolution	19.190 - 2.300
R-factor	0.205
Rwork	0.204
R-free	0.22700
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	1csp
RMSD bond length	0.015
RMSD bond angle	1.617
Data reduction software	XDS (VERSION June 2005)
Data scaling software	XSCALE
Phasing software	AMoRE
Refinement software	REFMAC

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	20.000	2.300
High resolution limit [Å]	2.220	2.220
Rmerge	0.049	0.157
Number of reflections	4621
<I/σ(I)>	26.65	7.9
Completeness [%]	98.3	83.3
Redundancy	6.7	5.4

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, SITTING DROP	7.5	293.15	reservoir solution: 1.5 M lithium sulfate, 0.1 M TRIS pH 7.5, 15% glycerol for cryoprotection. protein solution: 20 mM TRIS pH 7.5, 50 mM NaCl, 3 mM MgCl2, 17.4 mg/ml protein. crystallization setup: 0.8 microliter protein solution:0.8 microliter reservoir solution, VAPOR DIFFUSION, SITTING DROP, temperature 293.15K