1IBC | pdb_00001ibc

CRYSTAL STRUCTURE OF INHIBITED INTERLEUKIN-1BETA CONVERTING ENZYME

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other		ICE INHIBITED BY ACE-YVAD-CHO

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		8.5		1.5 ML DROPS OF PROTEIN-INHIBITOR SOLUTION (5.0 MG/ML IN 10 MILLIMOLAR TRIS-HCL, PH 8.5, 10 MILLI-MOLAR DTT, 3 MILLIMOLAR SODIUM AZIDE) WERE MIXED WITH AN EQUAL VOLUME OF RESERVOIR BUFFER (7.2% PEG-6000 (W:W), 0.10 M PIPES PH 5.8, 10 MILLIMOLAR DTT, 3 MILLIMOLAR SODIUM AZIDE) AND INCUBATED AT ROOM TEMPERATURE.

Crystal Properties
Matthews coefficient	Solvent content
2.72	58

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 64.61	α = 90
b = 64.61	β = 90
c = 160.1	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	293	AREA DETECTOR	SIEMENS		1996-04-09	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1

Data Collection

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	DIFFERENCE FOURIER	THROUGHOUT	ICE INHIBITED BY ACE-YVAD-CHO	2.73	20	2	8078	863	84.4	0.173	0.173	0.1809	0.285	RANDOM	33

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]

RMS Deviations
Key	Refinement Restraint Deviation
x_dihedral_angle_d	24
x_scangle_it	15.18
x_mcangle_it	11.06
x_scbond_it	10.61
x_mcbond_it	7.36
x_angle_deg	1.4
x_improper_angle_d	1.19
x_bond_d	0.008
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d_na
x_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2073
Nucleic Acid Atoms
Solvent Atoms	38
Heterogen Atoms

Software

Software
Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
SAINT	data reduction
SAINT	data scaling
X-PLOR	phasing