1C5X

STRUCTURAL BASIS FOR SELECTIVITY OF A SMALL MOLECULE, S1-BINDING, SUB-MICROMOLAR INHIBITOR OF UROKINASE TYPE PLASMINOGEN ACTIVATOR

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1LMW

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5		LMW human uPA/A145 was concentrated to 10 mg/ml and incubated in 50 mM HEPES, 5.0 mM NaCl. pH 7.4, 1.4 mM 4-iodobenzo[b]thiophene-2-carboxamidine for 15 min on ice. The complex was crystallized by vapor diffusion in hanging drops containing equal volumes of protein-inhibitor solution (0.28 mM uPA/A145, 1.4 mM inhibitor) and well solution (20 % 2-propanol, 20 % PEG 4K, 100 mM sodium citrate, pH 6.5) sealed over the well.

Crystal Properties
Matthews coefficient	Solvent content
2.01	25.6

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 82.09	α = 90
b = 49.78	β = 113.29
c = 66.65	γ = 90

Symmetry
Space Group	C 1 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	298	IMAGE PLATE	RIGAKU RAXIS IV++	MSC MIRRORS	1998-03-22	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE

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	1.32	38.49	68	0.088	4	2.8	27491			0.8

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)
	1.75	1.83	38.9		0.235	1.6

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation 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	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	DIFFERENCE FOURIER PLUS REFINEMENT	X-PLOR	PDB1LMW	1.75	7.5	2	16929	1709	68	0.195	0.195	0.244

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
x_dihedral_angle_d	24.4
x_angle_deg	4
x_improper_angle_d	0.43
x_bond_d	0.017

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4188
Nucleic Acid Atoms
Solvent Atoms	1152
Heterogen Atoms	81

Software

Software
Software Name	Purpose
bioteX	data collection
bioteX	data reduction
X-PLOR	model building
Quanta	model building
Insight II	model building
X-PLOR	refinement
bioteX	data scaling
X-PLOR	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.