7H61

THE 1.76 A CRYSTAL STRUCTURE OF HUMAN CHYMASE IN COMPLEX WITH N-[2-[6-ethyl-2-[(2-hydroxy-5-oxo-3-phenylcyclopenten-1-yl)-phenylmethyl]-1H-indol-3-yl]ethyl]acetamide

This is a non-PDB format compatible entry.

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	ROTATING ANODE
Source details	BRUKER AXS MICROSTAR
Temperature [K]	100
Detector technology	IMAGE PLATE
Collection date	2005-10-25
Detector	MAR scanner 345 mm plate
Wavelength(s)	1.5418
Spacegroup name	P 43
Unit cell lengths	74.740, 74.740, 49.350
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	19.120 - 1.740
R-factor	0.15678
Rwork	0.155
R-free	0.18209
Structure solution method	MOLECULAR REPLACEMENT
RMSD bond length	0.003
RMSD bond angle	1.147
Data reduction software	XDS
Data scaling software	XSCALE
Phasing software	PHASER
Refinement software	REFMAC (5.8.0425)

Data quality characteristics

	Overall	Inner shell	Outer shell
Low resolution limit [Å]	19.120	19.120	1.840
High resolution limit [Å]	1.740	5.220	1.740
Rmerge	0.045	0.024	0.288
Rmeas	0.048	0.026	0.308
Total number of observations	246195
Number of reflections	28058	1072	4243
<I/σ(I)>	31.67	70.3	6.8
Completeness [%]	99.8

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	MICROBATCH	8.5	293	Sample of human Chymase in 50 mM MES/NaOH pH 5.5, 150mM NaCl, 1mM TCEP, 10% Glycerol) at a concentration of 11mg/ml to 14mg/ml.Add [2-[(4-methylpyridin-2-yl)amino]-2-oxoethyl] 2-methylquinoline-4-carboxylate at 10x molar ratio. The compound helps to obtain crystals but is not visible in the structures. Add 0.5 mM ZnCl2. Add inhibitor, incubate for 16h on ice. Crystallize using microbatch setups with Al's oil (Hampton Research), with total drop size 1ul with 50% protein sample, using crystallization reagent of 0.1M Tris/HCl pH 8.5, 0.2M NaCl, 25% PEG 3350.