3GT9

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

X-RAY DIFFRACTION

---

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
2.35	47.63

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 87.531	α = 90
b = 87.531	β = 90
c = 73.464	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		2003-11-15	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	1.7	14.86	99.9	0.054	41.7	11.1	32040	32004		-3

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	1.7	1.76	99.8		0.658	3.9	9.8	3164

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	Difference Fourier	THROUGHOUT	1.3 A STRUCTURE OF THE ML-IAP/XIAP PROTEIN BOUND TO A DIFFERENT PEPTIDOMIMETIC, WITH THE LIGAND AND SURROUNDING WATERS REMOVED	1.7	14.86	30386	30301	1594	99.72	0.17	0.17133	0.17021	0.19337	RANDOM	28.094

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]
-0.54			-0.54		1.08

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	30.526
r_dihedral_angle_3_deg	12.186
r_dihedral_angle_4_deg	8.151
r_dihedral_angle_1_deg	4.352
r_scangle_it	2.328
r_mcangle_it	1.761
r_mcbond_it	1.525
r_scbond_it	1.438
r_angle_refined_deg	1.065
r_angle_other_deg	0.762
r_mcbond_other	0.233
r_nbd_refined	0.197
r_nbtor_refined	0.19
r_nbd_other	0.178
r_symmetry_vdw_other	0.147
r_symmetry_hbond_refined	0.089
r_symmetry_vdw_refined	0.087
r_nbtor_other	0.081
r_xyhbond_nbd_refined	0.077
r_chiral_restr	0.054
r_bond_refined_d	0.006
r_gen_planes_refined	0.003
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1446
Nucleic Acid Atoms
Solvent Atoms	309
Heterogen Atoms	74

Software

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