2FQQ

Crystal structure of human caspase-1 (Cys285->Ala, Cys362->Ala, Cys364->Ala, Cys397->Ala) in complex with 1-methyl-3-trifluoromethyl-1H-thieno[2,3-c]pyrazole-5-carboxylic acid (2-mercapto-ethyl)-amide

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	295	10 mM HEPES, 16.5% PEG 3350, 250 mM (NH4)2SO4, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.86	56.97

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 71.044	α = 90
b = 71.044	β = 90
c = 117.761	γ = 120

Symmetry
Space Group	P 32 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	110	IMAGE PLATE	RIGAKU RAXIS IV		2004-06-03	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RUH3R

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	3.3	20	99.3			11608	5490	1	5

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.3	3.48	99.8

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1SC1	3.3	20	5490	5225	247	99.51	0.24542	0.24542	0.2438	0.28015	RANDOM	53.207

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]
4.51	2.26		4.51		-6.77

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.744
r_dihedral_angle_3_deg	15.756
r_dihedral_angle_4_deg	10.942
r_dihedral_angle_1_deg	3.259
r_angle_refined_deg	1.119
r_nbtor_refined	0.284
r_symmetry_hbond_refined	0.165
r_nbd_refined	0.123
r_xyhbond_nbd_refined	0.086
r_symmetry_vdw_refined	0.071
r_chiral_restr	0.042
r_bond_refined_d	0.006
r_gen_planes_refined	0.001
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_it
r_mcbond_other
r_mcangle_it
r_scbond_it
r_scangle_it
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1861
Nucleic Acid Atoms
Solvent Atoms	18
Heterogen Atoms	19

Software

Software
Software Name	Purpose
REFMAC	refinement
CrystalClear	data reduction
d*TREK	data scaling
AMoRE	phasing