2H4Y

Crystal structure of human caspase-1 (Arg286->Lys) in complex with 3-[2-(2-benzyloxycarbonylamino-3-methyl-butyrylamino)-propionylamino]-4-oxo-pentanoic acid (z-VAD-FMK)

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6	277	0.1 M PIPES, 200 mM Li2SO4, 25% PEG 2000 MME, 10 mM DTT, 3 mM NaN3, 2 mM MgCl2, pH 6.0, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.36	47.85

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 63.343	α = 90
b = 63.343	β = 90
c = 141.607	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	110	IMAGE PLATE	RIGAKU RAXIS IV		2005-03-17	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU300	1.54

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	1.9	20	96.8				22772	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	1.9	1.97	90.6

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 1SC3	1.9	20	20805	19735	1070	88.48	0.228	0.20481	0.20314	0.23548	RANDOM	21.984

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]
-0.67			-0.67		1.33

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	5.227
r_scangle_it	2.457
r_mcangle_it	2.305
r_scbond_it	1.537
r_mcbond_it	1.321
r_angle_refined_deg	0.879
r_nbd_refined	0.161
r_symmetry_vdw_refined	0.14
r_xyhbond_nbd_refined	0.079
r_symmetry_hbond_refined	0.071

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	5.227
r_scangle_it	2.457
r_mcangle_it	2.305
r_scbond_it	1.537
r_mcbond_it	1.321
r_angle_refined_deg	0.879
r_nbd_refined	0.161
r_symmetry_vdw_refined	0.14
r_xyhbond_nbd_refined	0.079
r_symmetry_hbond_refined	0.071
r_chiral_restr	0.059
r_bond_refined_d	0.006
r_gen_planes_refined	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2019
Nucleic Acid Atoms
Solvent Atoms	189
Heterogen Atoms

Software

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

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.