1MW9

Crystal Structure of H365R mutant of 67 kDA N-terminal fragment of E. coli DNA Topoisomerase I

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	SSRL BEAMLINE BL9-1
Synchrotron site	SSRL
Beamline	BL9-1
Temperature [K]	103
Detector technology	IMAGE PLATE
Collection date	1999-08-15
Detector	MARRESEARCH
Wavelength(s)	0.98
Spacegroup name	P 21 21 21
Unit cell lengths	62.990, 78.705, 139.328
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	50.000 * - 1.670
R-factor	0.20885
Rwork	0.208
R-free	0.22700 *
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	1ecl
RMSD bond length	0.005
RMSD bond angle	1.170 *
Data scaling software	SCALA
Phasing software	CNS
Refinement software	REFMAC (5.0)

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	50.000
High resolution limit [Å]	1.670
Rmerge	0.057 *	0.407 *
Total number of observations	398050 *
Number of reflections	79717
<I/σ(I)>	8.2
Completeness [%]	98.4	98.4 *

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	Vapor diffusion, hanging drop *	8	287	ammonium sulfate, pH 8, DIALYSIS, temperature 287K

Crystallization Reagents in Literatures

ID	crystal ID	solution	reagent name	concentration (unit)	details
1	1	reservoir	ammonium sulfate	2.1 (M)