5R44

Crystal Structure of gamma-Chymotrypsin at pH 7.5, room temperature

Experimental procedure

Experimental method	SINGLE WAVELENGTH
Source type	SYNCHROTRON
Source details	APS BEAMLINE 23-ID-B
Synchrotron site	APS
Beamline	23-ID-B
Temperature [K]	297
Detector technology	CCD
Collection date	2009-07-15
Detector	MARMOSAIC 300 mm CCD
Wavelength(s)	0.9
Spacegroup name	P 42 21 2
Unit cell lengths	69.258, 69.258, 97.979
Unit cell angles	90.00, 90.00, 90.00

Refinement procedure

Resolution	56.560 - 1.050
R-factor	0.1142
Rwork	0.114
R-free	0.12190
Structure solution method	FOURIER SYNTHESIS
Starting model (for MR)	1gct
RMSD bond length	0.011
RMSD bond angle	1.505
Data reduction software	HKL-2000
Data scaling software	SCALEPACK
Phasing software	PHENIX
Refinement software	REFMAC (5.8.0158)

Data quality characteristics

	Overall	Inner shell	Outer shell
Low resolution limit [Å]	50.000	50.000	1.090
High resolution limit [Å]	1.050	2.260	1.050
Rmerge	0.105	0.087	0.816
Total number of observations	4870376
Number of reflections	110206	11306	10363
<I/σ(I)>	15.2
Completeness [%]	99.0	96.5	94.4
Redundancy	44.2	44.3	6.9

Crystallization Conditions

crystal ID	method	pH	temperature	details
1	VAPOR DIFFUSION, SITTING DROP		297	45% saturated ammonium sulfate, 0.75% saturated cetyltrimethylammonium bromide, 100 mM sodium iodide; sodium malonate