3NBR

Crystal Structure of Ketosteroid Isomerase D38NP39GD99N from Pseudomonas Testosteroni (tKSI) with 4-Androstene-3,17-dione Bound

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	8CHO	PDB ENTRY 8CHO

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.2	298	2 M ammonium sulfate, 20 mM potassium phosphate, 1 mM EDTA, 2mM DTT, pH 7.2, vapor diffusion, sitting drop, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.79	55.85

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 60.168	α = 90
b = 60.168	β = 90
c = 142.585	γ = 120

Symmetry
Space Group	P 65 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	ADSC QUANTUM 315r		2010-05-14		SINGLE WAVELENGTH
2	1	x-ray	100	CCD	MARMOSAIC 325 mm CCD		2010-01-05		SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-1	0.97946	SSRL	BL9-1
2	SYNCHROTRON	SSRL BEAMLINE BL9-2	0.97946	SSRL	BL9-2

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	1.73	52.107	99.9	0.058	30.9	19.2	16748	16748

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	1.73	1.82	99.5		0.023	2.265	1.4	15.7

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 8CHO	1.73	52.107	16407	15577	830	98.15	0.23411	0.23252	0.26483	RANDOM	43.128

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]
1.47	0.73		1.47		-2.2

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.438
r_dihedral_angle_4_deg	19.089
r_dihedral_angle_3_deg	18.526
r_dihedral_angle_1_deg	8.607
r_scangle_it	5.308
r_scbond_it	3.423
r_angle_refined_deg	2.258
r_mcangle_it	2.219
r_mcbond_it	1.325
r_chiral_restr	0.144
r_bond_refined_d	0.026
r_gen_planes_refined	0.01
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	934
Nucleic Acid Atoms
Solvent Atoms	69
Heterogen Atoms	36

Software

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