Experiment: 1NQC

Crystal structures of Cathepsin S inhibitor complexes

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1ATK	Search model consists of a polyalanine homolgy model of cathepsin S constructed from cathepsin K (PDB code 1atk) and Cathepsin L from the procathepsin L (PDB code 1cj1)
experimental model	PDB	1CJ1	Search model consists of a polyalanine homolgy model of cathepsin S constructed from cathepsin K (PDB code 1atk) and Cathepsin L from the procathepsin L (PDB code 1cj1)

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.5	293	Sodium Acetate, Ammonium Sulphate, pH 5.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.62	52.6

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 36.9	α = 90
b = 76.5	β = 90
c = 101.9	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	ADSC QUANTUM 4		2001-07-07	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 5.0.2	1.00	ALS	5.0.2

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	1.8	30	91.4	0.148	6.4		207895	207486

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.8	1.83	50.5		0.535

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-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	Search model consists of a polyalanine homolgy model of cathepsin S constructed from cathepsin K (PDB code 1atk) and Cathepsin L from the procathepsin L (PDB code 1cj1)	1.8	30	24541	24541	1184		0.199	0.2141	0.219	0.2274	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
c_dihedral_angle_d	23.2
c_angle_d	1.4
c_improper_angle_d	0.86
c_bond_d	0.01

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1687
Nucleic Acid Atoms
Solvent Atoms	245
Heterogen Atoms	32

Software

Software
Software Name	Purpose
Adxv	data processing
SCALEPACK	data scaling
CNS	refinement
CNS	phasing