3OV4

Crystal Structure of Ketosteroid Isomerase P39GV40GS42G from Pseudomonas Testosteroni (tKSI) bound to Equilenin

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.2	298	10mg/ml protein, 1.8 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
2.84	56.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 64.36	α = 90
b = 64.36	β = 90
c = 505.583	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		2010-03-24		SINGLE WAVELENGTH
2	1	x-ray	100	CCD	ADSC QUANTUM 315r		2010-04-07		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	1.825	37.45	98.7	0.07	25.8	13.1	56752	56752

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	1.83	1.87	87.2		0.383	0.383	2	2.3	3579

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	8CHO	1.83	37.45	56549	56549	2873	98.64	0.1894	0.1894	0.1874	0.2276	RANDOM	18.6023

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]
0.38	0.19		0.38		-0.57

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.285
r_dihedral_angle_4_deg	18.646
r_dihedral_angle_3_deg	15.621
r_dihedral_angle_1_deg	6.284
r_scangle_it	4.601
r_scbond_it	2.999
r_mcangle_it	2.098
r_angle_refined_deg	1.857
r_angle_other_deg	1.397
r_mcbond_it	1.224

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.285
r_dihedral_angle_4_deg	18.646
r_dihedral_angle_3_deg	15.621
r_dihedral_angle_1_deg	6.284
r_scangle_it	4.601
r_scbond_it	2.999
r_mcangle_it	2.098
r_angle_refined_deg	1.857
r_angle_other_deg	1.397
r_mcbond_it	1.224
r_mcbond_other	0.255
r_chiral_restr	0.121
r_bond_refined_d	0.022
r_gen_planes_refined	0.009
r_gen_planes_other	0.004
r_bond_other_d	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3683
Nucleic Acid Atoms
Solvent Atoms	502
Heterogen Atoms	125

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 National Science Foundation (DBI-1832184), 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.