3KJN

Caspase 8 bound to a covalent inhibitor

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	6.5	277	2 microliters of 100 mM inhibitor stock in DMSO was added to 100 microliters of 8.4 mg/mL protein in 20 mM Tris, 100 mM DTT, pH 8.0. Protein solution was mixed with an equal volume of well solution (1.0-1.1 M Citrate, 50 mM HEPES or PIPES pH 6.5, 25 mM DTT), VAPOR DIFFUSION, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.48	50.35

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 62.598	α = 90
b = 62.598	β = 90
c = 129.389	γ = 120

Symmetry
Space Group	P 31 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	100	CCD	ADSC QUANTUM 210			M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 17-ID	1.0	APS	17-ID

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	1.8	20	95.7			27933	26732

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.8	1.85

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	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	1.8	19.94	24018	2714	95.7	0.17025	0.17025	0.16674	0.20224	RANDOM	9.42

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]
-0.25	-0.12		-0.25		0.37

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.334
r_dihedral_angle_4_deg	13.978
r_dihedral_angle_3_deg	12.108
r_dihedral_angle_1_deg	5.725
r_scangle_it	2.064
r_scbond_it	1.318
r_angle_refined_deg	1.202
r_angle_other_deg	0.85
r_mcangle_it	0.68
r_mcbond_it	0.428
r_symmetry_vdw_other	0.198
r_nbd_refined	0.191
r_nbd_other	0.181
r_nbtor_refined	0.181
r_xyhbond_nbd_refined	0.123
r_symmetry_vdw_refined	0.119
r_mcbond_other	0.089
r_nbtor_other	0.081
r_symmetry_hbond_refined	0.072
r_chiral_restr	0.071
r_bond_refined_d	0.007
r_gen_planes_refined	0.004
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1906
Nucleic Acid Atoms
Solvent Atoms	243
Heterogen Atoms	51

Software

Software
Software Name	Purpose
HKL-2000	data collection
AMoRE	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling