5R4C

Crystal Structure of gamma-Chymotrypsin at pH 9, room temperature

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
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

Crystal Properties
Matthews coefficient	Solvent content
2.26	45.55

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 69.978	α = 90
b = 69.978	β = 90
c = 97.33	γ = 90

Symmetry
Space Group	P 42 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	297	CCD	MARMOSAIC 300 mm CCD		2010-11-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 23-ID-B	0.9	APS	23-ID-B

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1	1.15	50	100	0.12	10.2	90.8		86175

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.15	1.19	99.8			12.4

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	FOURIER SYNTHESIS	THROUGHOUT	1GCT	1.15	56.82	81725	4305	99.75	0.1133	0.1127	0.1235	RANDOM	21.095

Temperature Factor Modeling
Anisotropic B[1][1]	Anisotropic B[1][2]	Anisotropic B[1][3]	Anisotropic B[2][2]	Anisotropic B[2][3]	Anisotropic B[3][3]
-0.11			-0.11		0.22

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.964
r_sphericity_free	27.351
r_dihedral_angle_4_deg	15.583
r_dihedral_angle_3_deg	11.107
r_sphericity_bonded	10.11
r_dihedral_angle_1_deg	6.557
r_rigid_bond_restr	3.668
r_angle_refined_deg	1.597
r_angle_other_deg	1.069
r_chiral_restr	0.106
r_bond_refined_d	0.012
r_gen_planes_refined	0.008
r_gen_planes_other	0.002
r_bond_other_d	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1817
Nucleic Acid Atoms
Solvent Atoms	163
Heterogen Atoms	6

Software

Software
Software Name	Purpose
HKL-2000	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
PHENIX	phasing