1QTW

HIGH-RESOLUTION CRYSTAL STRUCTURE OF THE ESCHERICHIA COLI DNA REPAIR ENZYME ENDONUCLEASE IV

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	SSRL BEAMLINE BL9-1
Synchrotron site	SSRL
Beamline	BL9-1
Temperature [K]	100
Detector technology	IMAGE PLATE
Collection date	1998-03-19
Detector	MARRESEARCH
Spacegroup name	P 1 21 1
Unit cell lengths	49.620, 59.560, 50.980
Unit cell angles	90.00, 110.94, 90.00

Refinement procedure

Resolution	20.000 - 1.020
R-factor	0.124
Rwork	0.124
R-free	0.14800
RMSD bond length	0.016
RMSD bond angle	2.500
Data scaling software	SCALEPACK
Phasing software	SOLVE
Refinement software	SHELXL-97

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	30.000	1.040
High resolution limit [Å]	1.020	1.020
Rmerge	0.042	0.436
Total number of observations	465830 *
Number of reflections	142898
<I/σ(I)>	13.2	2.5
Completeness [%]	96.0	83.2
Redundancy	3.26	2.2

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	Vapor diffusion, hanging drop *	6.5 *	298	PEG 400, HEPES, ZNCL2, pH 6.0, VAPOR DIFFUSION, SITTING DROP at 298 K

Crystallization Reagents in Literatures

ID	crystal ID	solution	reagent name	concentration (unit)	details
1	1	reservoir	mPEG2000	20 (%)
2	1	reservoir	MES	100 (mM)