Experiment: 2I88

Crystal structure of the Channel-forming Domain of Colicin E1

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION		295	50 mM MES at pH 6.0 25 mM Tris-HCl pH 7-8 100 mM NaCo or NaNO3 23-27% PEG 3350 very sensitive to temperatue stabilized by slow addition to of PEG 20,000 to 2-3%, VAPOR DIFFUSION, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.67	53.86

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 87.46	α = 90
b = 87.46	β = 90
c = 59.1	γ = 90

Symmetry
Space Group	I 4

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	295	IMAGE PLATE	RIGAKU RAXIS II			M	SINGLE WAVELENGTH

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

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	2.5	32	86.5	0.035	13.97	3.7	7727	6684	1	3	51.5

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)
	2.5	2.64	61.4		0.125	5.5	2.2	683

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MIR	2.5	32	3	1	7730	6684	562	86.5	0.182	0.176	0.172	0.1717	0.284	0.259	random	38.885

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
c_angle_deg	1.6
c_bond_d	0.013

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1392
Nucleic Acid Atoms
Solvent Atoms	22
Heterogen Atoms

Software

Software
Software Name	Purpose
CNS	refinement
PDB_EXTRACT	data extraction
CrystalClear	data collection
DENZO	data reduction
CCP4	data scaling
CCP4	phasing