1RWO

Crystal structure of human caspase-1 in complex with 4-oxo-3-{6-[4-(quinoxalin-2-ylamino)-benzoylamino]-2-thiophen-2-yl-hexanoylamino}-pentanoic acid

X-RAY DIFFRACTION

Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6	278	0.1M PIPES, 200mM Li2SO4, 25% PEG2K MME, 10mM DTT, 3mM NaN3, 2mM MgCl2, pH 6.0, VAPOR DIFFUSION, HANGING DROP, temperature 278K

Crystal Properties
Matthews coefficient	Solvent content
2.67	53.86

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 63.184	α = 90
b = 63.184	β = 90
c = 160.931	γ = 90

Symmetry
Space Group	P 43 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	180	IMAGE PLATE			2003-01-31	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL7-1	1.08	SSRL	BL7-1

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	2.1	20	97.8	0.074				19365

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	2.1	2.17	89.2		0.204

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ID 1ICE	2.1	20	19365	18317	988	97.46	0.19974	0.19748	0.2418	RANDOM	21.752

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]
0.62			0.62		-1.24

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	5.102
r_scangle_it	2.43
r_mcangle_it	2.32
r_scbond_it	1.529
r_mcbond_it	1.298
r_angle_refined_deg	0.899
r_nbd_refined	0.162
r_symmetry_vdw_refined	0.151
r_symmetry_hbond_refined	0.099
r_xyhbond_nbd_refined	0.081

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	5.102
r_scangle_it	2.43
r_mcangle_it	2.32
r_scbond_it	1.529
r_mcbond_it	1.298
r_angle_refined_deg	0.899
r_nbd_refined	0.162
r_symmetry_vdw_refined	0.151
r_symmetry_hbond_refined	0.099
r_xyhbond_nbd_refined	0.081
r_chiral_restr	0.058
r_bond_refined_d	0.006
r_gen_planes_refined	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2069
Nucleic Acid Atoms
Solvent Atoms	228
Heterogen Atoms	41

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
d*TREK	data scaling
AMoRE	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.