1G9K

CRYSTAL STRUCTURE OF A PSYCHROPHILIC ALKALINE PROTEASE FROM PSEUDOMONAS TAC II 18

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	ROTATING ANODE
Source details	ENRAF-NONIUS FU581
Temperature [K]	289
Detector technology	IMAGE PLATE
Collection date	2000-10-20
Detector	MARRESEARCH
Wavelength(s)	1.5418
Spacegroup name	H 3
Unit cell lengths	186.010, 186.010, 37.970
Unit cell angles	90.00, 90.00, 120.00

Refinement procedure

Resolution	46.130 - 1.960
Rwork	0.156
R-free	0.18700
Structure solution method	MOLECULAR REPLACEMENT
Starting model (for MR)	A lower resolution structure (not yet deposited) solved by the molecular replacement method using pdb entry 1KAP as a search model
RMSD bond length	0.005
RMSD bond angle	1.159 *
Data reduction software	DENZO
Data scaling software	SCALEPACK
Phasing software	CNS
Refinement software	CNS

Data quality characteristics

	Overall	Outer shell
Low resolution limit [Å]	93.010	2.010
High resolution limit [Å]	1.960	1.960
Rmerge	0.058	0.268
Number of reflections	33263
<I/σ(I)>	16.1	2.7
Completeness [%]	95.7	87.6
Redundancy	4	2

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, HANGING DROP	7	4 *	Villeret, V., (1997) Protein Sci., 6, 2462. *

Crystallization Reagents in Literatures

ID	crystal ID	solution	reagent name	concentration (unit)	details
1	1	reservoir	ammonium sulfate	1.6 (M)
2	1	reservoir	HEPES	0.1 (M)	pH7.0
3	1	drop	protein	15 (mg/ml)