2I3I

Structure of an ML-IAP/XIAP chimera bound to a peptidomimetic

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	298	Lithium sulfate, PEG 3350, Bis-tris, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.33	47.2

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 87.356	α = 90
b = 87.356	β = 90
c = 73.196	γ = 90

Symmetry
Space Group	P 41 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	100	IMAGE PLATE	MAR scanner 345 mm plate	Osmic mirrors	2005-02-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200	1.54

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	2.3	25	99.8	0.169	11	6.1	13116	13095		-3	26.4

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	2.3	2.38	100		0.597	3.4	6.1	1277

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	FOURIER SYNTHESIS	THROUGHOUT	1.3 A structure of the ML-IAP/XIAP protein bound to a different peptidomimetic, with the ligand and surrounding waters removed	2.3	24.34	13116	12395	644	99.71	0.189	0.18954	0.18783	0.22385	RANDOM	1.897

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]
-0.8			-0.8		1.6

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.892
r_dihedral_angle_3_deg	14.717
r_dihedral_angle_4_deg	14.587
r_dihedral_angle_1_deg	5.036
r_angle_refined_deg	1.363
r_scangle_it	0.849
r_angle_other_deg	0.827
r_mcangle_it	0.611
r_scbond_it	0.528
r_mcbond_it	0.463
r_nbd_refined	0.218
r_symmetry_vdw_other	0.206
r_nbtor_refined	0.191
r_xyhbond_nbd_refined	0.187
r_nbd_other	0.182
r_symmetry_hbond_refined	0.154
r_symmetry_vdw_refined	0.125
r_nbtor_other	0.083
r_chiral_restr	0.077
r_mcbond_other	0.051
r_bond_refined_d	0.013
r_gen_planes_refined	0.005
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1494
Nucleic Acid Atoms
Solvent Atoms	135
Heterogen Atoms	95

Software

Software
Software Name	Purpose
REFMAC	refinement
MAR345	data collection
DENZO	data reduction
SCALEPACK	data scaling