Experiment: 2XH6

Clostridium perfringens enterotoxin

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2QUO	PDB ENTRIES 2QUO AND 2ZS6
experimental model	PDB	2ZS6	PDB ENTRIES 2QUO AND 2ZS6

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1				32-40% V/V DIOXANE IN WATER

Crystal Properties
Matthews coefficient	Solvent content
4.2	71

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 210.664	α = 90
b = 119.296	β = 110.5
c = 74.834	γ = 90

Symmetry
Space Group	C 1 2 1

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	ADSC CCD	MIRRORS	2003-02-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-4		ESRF	ID14-4

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	2.7	70	95.8	0.09	12	2.7		42488			70.9

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	2.68	2.82	83.3		0.36	2.2	2.4

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 ENTRIES 2QUO AND 2ZS6	2.69	63.393	1.38	42676	2168	88.47	0.2131	0.2112	0.2042	0.2492	0.2423	55.7

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]
9.1143		3.0569	-3.8889		-5.2254

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	17.198
f_angle_d	1.532
f_chiral_restr	0.103
f_bond_d	0.014
f_plane_restr	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6611
Nucleic Acid Atoms
Solvent Atoms	179
Heterogen Atoms	58

Software

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