1QPI

CRYSTAL STRUCTURE OF TETRACYCLINE REPRESSOR/OPERATOR COMPLEX

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	ROTATING ANODE
Source details	ENRAF-NONIUS FR571
Temperature [K]	100
Detector technology	AREA DETECTOR
Collection date	1997-07-28
Detector	MARRESEARCH
Spacegroup name	C 2 2 21
Unit cell lengths	38.040, 193.200, 91.750
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	34.500 - 2.500
R-factor	0.244
Rwork	0.244
R-free	0.30700
RMSD bond length	0.008
RMSD bond angle	20.600 *
Data reduction software	DENZO
Data scaling software	SCALEPACK
Phasing software	AMoRE
Refinement software	X-PLOR (3.851)

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	24.500 *	2.550
High resolution limit [Å]	2.450	2.450
Rmerge	0.090	0.287
Total number of observations	42624 *
Number of reflections	11520 *
<I/σ(I)>	12.1
Completeness [%]	97.2	94.4 *
Redundancy	3.4	3

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	Vapor diffusion, hanging drop *	8		pH 8.00

Crystallization Reagents in Literatures

ID	crystal ID	solution	reagent name	concentration (unit)	details
1	1	reservoir	PEG4000	12.5 (%)	or 12.5 % mPEG5000
2	1	reservoir	salt	200-300 (mM)
3	1	reservoir	imidazole	100-150 (mM)