Experiment: 1EWC

CRYSTAL STRUCTURE OF ZN2+ LOADED STAPHYLOCOCCAL ENTEROTOXIN H

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1ENF

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	EVAPORATION	4.6	298	20% iso-propanol, 100 mM sodium acetate pH 4.6, 200 mM CaCl2, EVAPORATION, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
3.32	62.93

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 86.38	α = 90
b = 86.38	β = 90
c = 228.79	γ = 120

Symmetry
Space Group	H 3 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	MARRESEARCH		1999-05-06	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	MAX II BEAMLINE I711		MAX II	I711

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	1.95	22	92.4	0.082		4.6	24645	22772			18.1

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.95	2	94.9		0.246	3.1	3.7	1665

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 (Observed)	R-Work (Depositor)	R-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1ENF	1.95	22	24645	22772	1144	92.4	0.227	0.23	0.252	RANDOM	37.2

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]
6.39	3.31		6.39		-12.79

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	25.7
c_scangle_it	3.058
c_scbond_it	2.067
c_mcangle_it	1.98
c_angle_deg	1.51
c_mcbond_it	1.294
c_improper_angle_d	0.78
c_bond_d	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1731
Nucleic Acid Atoms
Solvent Atoms	150
Heterogen Atoms	1

Software

Software
Software Name	Purpose
XDS	data scaling
TRUNCATE	data reduction
CNS	refinement
XDS	data reduction
CCP4	data scaling
CNS	phasing