Experiment: 3URL

Endothiapepsin-DB6 complex.

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	Batch method	4.5	298	0.1M acetate buffer. 10-fold molar excess of inhibitor DB5 over enzyme. Enzyme concentration 2 mg/ml. 2.2M ammonium sulphate, pH 4.5, Batch method, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2	38.44

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 43.119	α = 90
b = 76.02	β = 96.99
c = 42.883	γ = 90

Symmetry
Space Group	P 1 21 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	MAR scanner 180 mm plate		1991-01-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	ELLIOTT GX-21	1.54178

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	2	28.42	92.8	0.127		3.3	18611	17271			12.631

Refinement

Statistics
Diffraction ID	Structure Solution Method	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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	FOURIER SYNTHESIS	2	28.42	17271	16376	873		0.1467	0.1467	0.1467	0.1323	0.2368	0.2086	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_angle_d	0.051
s_bond_d	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2469
Nucleic Acid Atoms
Solvent Atoms	317
Heterogen Atoms	15

Software

Software
Software Name	Purpose
MAR345	data collection
FFT	model building
SHELXL-97	refinement
MOSFLM	data reduction
SCALA	data scaling
FFT	phasing