Experiment: 3T42

Human aldose reductase in complex with a nitrile-containing IDD inhibitor

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2PZN

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		4.2	298	The hanging drop method was used to obtain crystals (EasyXtal Tool 24 culture plates, Qiagen). WT hALR2 was co-crystallized with the oxidized form of coenzyme NADP+ (Sigma) and inhibitor 2 at room temperature (ratios of protein / inhibitor / coenzyme = 1/2/2). Hanging drops were made by the mixing mother liquor (0.06 M citric acid, 0.04 M Bis-tris propane, 12% (w/v) PEG 3350, pH 4.2) with holoenzyme solution (10 mg/mL, 20 mM hepes, pH 7.0). Crystals were observed after three days of equilibration, EVAPORATION, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.18	43.49

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 39.858	α = 76.35
b = 46.963	β = 77.21
c = 46.907	γ = 67.79

Symmetry
Space Group	P 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	93	CCD	MARMOSAIC 325 mm CCD		2010-04-20	M	SINGLE WAVELENGTH

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

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	1.28	50	94.3	0.042	18.4	3.9		73538			13.14

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	1.28	1.33	87.7		0.301		3.4

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	2PZN	1.28	22.29	0.13	69094	1860	88.4	0.152	0.151	0.178	0.189

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]
-0.7789	1.5685	0.4889	3.1947	-0.7156	-2.4157

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	19.401
f_angle_d	1.341
f_chiral_restr	0.077
f_bond_d	0.008
f_plane_restr	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2525
Nucleic Acid Atoms
Solvent Atoms	431
Heterogen Atoms	88

Software

Software
Software Name	Purpose
HKL-2000	data collection
PHASER	phasing
PHENIX	refinement
HKL-2000	data reduction
SCALEPACK	data scaling