3BV7

Crystal structure of Delta(4)-3-ketosteroid 5-beta-reductase in complex with NADP and glycerol. Resolution: 1.79 A.

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3BUR

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	277	Protein: 5.0 mg/mL AKR1D1, 2.0 mM NADPH, 2.0 mM 5-beta-cholestan-3-one, 10.0 mM Tris (pH 7.4). Precipitant buffer: 0.1 M Tris (pH 7.0), 10-20% (wt/vol) PEG 4000, 10% isopropanol., pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.36	47.91

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 49.826	α = 90
b = 109.833	β = 90
c = 129.186	γ = 90

Symmetry
Space Group	P 21 21 21

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 225 mm CCD	Rosenbaum-Rock monochromator high-resolution double-crystal Si (111) sagittal focusing. Rosenbaum-Rock vertical focusing mirror.	2007-11-23	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-BM	1.00	APS	22-BM

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	1.79	50	98.6	0.109	20.5	4.1	66774	66774

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	1.79	1.85	100		0.37	3.4	4.1	6684

Refinement

Statistics
Diffraction ID	Structure Solution 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	FOURIER SYNTHESIS	3BUR	1.79	50	63320	63320	2800		0.2361	0.2361		0.2571	RANDOM

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]

RMS Deviations
Key	Refinement Restraint Deviation
s_non_zero_chiral_vol	0.031
s_from_restr_planes	0.024
s_bond_d	0.02
s_angle_d	0.012
s_approx_iso_adps

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5254
Nucleic Acid Atoms
Solvent Atoms	348
Heterogen Atoms	114

Software

Software
Software Name	Purpose
SHELXL-97	refinement
CNS	refinement
ADSC	data collection
HKL-2000	data reduction
SCALEPACK	data scaling
CNS	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 R01GM157729.