5R4B

Crystal Structure of deuterated gamma-Chymotrypsin at pH 9, cryo temperature

X-RAY DIFFRACTION

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
2.18	43.48

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 69.149	α = 90
b = 69.149	β = 90
c = 96.024	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	100	CCD	MARMOSAIC 300 mm CCD		2010-07-21	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	1.05	50	98.4	0.131	9.1	16.7		106973

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.05	1.09	84		0.721		4.6

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	1.05	56.11	101543	5357	98.32	0.1261	0.125	0.1461	RANDOM	12.356

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]
0.19			0.19		-0.38

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.691
r_sphericity_free	27.664
r_dihedral_angle_4_deg	12.207
r_dihedral_angle_3_deg	11.206
r_sphericity_bonded	9.753
r_dihedral_angle_1_deg	7.164
r_rigid_bond_restr	2.912
r_angle_refined_deg	1.745
r_angle_other_deg	1.175
r_chiral_restr	0.104

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.691
r_sphericity_free	27.664
r_dihedral_angle_4_deg	12.207
r_dihedral_angle_3_deg	11.206
r_sphericity_bonded	9.753
r_dihedral_angle_1_deg	7.164
r_rigid_bond_restr	2.912
r_angle_refined_deg	1.745
r_angle_other_deg	1.175
r_chiral_restr	0.104
r_bond_refined_d	0.013
r_gen_planes_refined	0.009
r_gen_planes_other	0.003
r_bond_other_d	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1830
Nucleic Acid Atoms
Solvent Atoms	426
Heterogen Atoms	31

Software

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

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.