Experiment: 2WXU

Clostridium perfringens alpha-toxin strain NCTC8237 mutant T74I

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1CA1	PDB ENTRY 1CA1 WITHOUT RESIDUES 75-84

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7.6		1 M NA ACETATE, 0.1 M NA-HEPES, PH7.6, 0.05 M CDSO4

Crystal Properties
Matthews coefficient	Solvent content
2.45	49.9

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 59.861	α = 90
b = 173.643	β = 90
c = 78.564	γ = 90

Symmetry
Space Group	C 2 2 21

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	MARRESEARCH	MIRRORS	2004-02-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-2		ESRF	ID14-2

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	1.8	24.64	99.2	0.07	13.8	5.2		38029			17.57

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	1.8	1.9	99.9		0.32	3.9	5.3

Refinement

Statistics
Diffraction ID	Structure Solution 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 (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB ENTRY 1CA1 WITHOUT RESIDUES 75-84	1.8	24.641	1.41	38005	1899	99.05	0.1773	0.1753	0.1722	0.2163	0.2123	27.1

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]
1.6472			-0.9569		-0.6903

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	17.39
f_angle_d	0.983
f_chiral_restr	0.068
f_bond_d	0.007
f_plane_restr	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2902
Nucleic Acid Atoms
Solvent Atoms	402
Heterogen Atoms	13

Software

Software
Software Name	Purpose
PHENIX	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing