4L7K

Crystal Structure of Ketosteroid Isomerase D38E from Pseudomonas Testosteroni (tKSI)

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.2	298	5mg/ml protein, 1.6 M ammonium sulfate, 40mM potassium phosphate, 1 mM EDTA, 2mM DTT, pH 7.2, VAPOR DIFFUSION, SITTING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.76	55.51

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 111.128	α = 90
b = 111.128	β = 90
c = 499.813	γ = 120

Symmetry
Space Group	P 61 2 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 325 mm CCD	Si double crystal	2010-03-24		SINGLE WAVELENGTH
2	1	x-ray	100	CCD	ADSC QUANTUM 315r	Si single crystal	2010-05-10		SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-2	0.9795	SSRL	BL9-2
2	SYNCHROTRON	SSRL BEAMLINE BL9-1	0.9795	SSRL	BL9-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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
1,2	2.1	29.937	99.9	0.137	18.5	18.7	107620	107620

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1,2	2.1	2.21	99.7		0.728	0.728	1.1	10.7	15360

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (All)	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	MOLECULAR REPLACEMENT	THROUGHOUT	2.1	29.26	107450	107450	5363	99.96	0.3055	0.3029	0.354	RANDOM	33.8882

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]
1.41	0.71		1.41		-2.12

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.135
r_dihedral_angle_4_deg	19.637
r_dihedral_angle_3_deg	16.615
r_dihedral_angle_1_deg	6.237
r_angle_other_deg	2.064
r_scangle_it	1.52
r_angle_refined_deg	1.172
r_scbond_it	0.921
r_mcangle_it	0.598
r_mcbond_it	0.326

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.135
r_dihedral_angle_4_deg	19.637
r_dihedral_angle_3_deg	16.615
r_dihedral_angle_1_deg	6.237
r_angle_other_deg	2.064
r_scangle_it	1.52
r_angle_refined_deg	1.172
r_scbond_it	0.921
r_mcangle_it	0.598
r_mcbond_it	0.326
r_mcbond_other	0.082
r_chiral_restr	0.064
r_bond_refined_d	0.007
r_gen_planes_refined	0.006
r_gen_planes_other	0.005
r_bond_other_d	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	11276
Nucleic Acid Atoms
Solvent Atoms	901
Heterogen Atoms	285

Software

Software
Software Name	Purpose
SCALA	data scaling
MOLREP	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
Blu-Ice	data collection
XDS	data reduction

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 R01GM157729.