2ASC

Scorpion toxin LQH-alpha-IT

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	293	0.01M Hexadecyltrimethylammonium Bromide, 0.5M NaCl, 0.01M MgCl, 0.01M MgCl, pH 7.5, vapor diffusion, hanging drop, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
3.08	60.08

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 129.714	α = 90
b = 129.714	β = 90
c = 129.714	γ = 90

Symmetry
Space Group	F 4 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	CCD	ADSC QUANTUM 4	Mirrors	2003-12-10	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-4	0.933	ESRF	ID14-4

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	1.1	74.95	99.9	0.067	0.067	40.1	28.2	38414	38414			9.95

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.1	1.12	99.4				1887

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 (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1SEG	1.1	40	38414	36525	1925	99.93	0.131	0.13082	0.13044	0.13794	RANDOM	16.083

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
r_dihedral_angle_2_deg	27.729
r_sphericity_free	23.275
r_dihedral_angle_4_deg	18.638
r_dihedral_angle_3_deg	12.515
r_scangle_it	12.318
r_scbond_it	10.348
r_sphericity_bonded	10.121
r_mcangle_it	7.522
r_dihedral_angle_1_deg	6.616
r_mcbond_it	6.258
r_rigid_bond_restr	6.011
r_mcbond_other	3.686
r_angle_other_deg	2.075
r_angle_refined_deg	1.771
r_symmetry_vdw_refined	0.398
r_symmetry_vdw_other	0.335
r_symmetry_hbond_refined	0.286
r_nbd_refined	0.261
r_nbd_other	0.228
r_nbtor_refined	0.19
r_xyhbond_nbd_refined	0.19
r_chiral_restr	0.142
r_nbtor_other	0.101
r_metal_ion_refined	0.092
r_symmetry_metal_ion_refined	0.05
r_bond_refined_d	0.017
r_gen_planes_refined	0.009
r_bond_other_d	0.005
r_gen_planes_other	0.002
r_xyhbond_nbd_other
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_other

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	550
Nucleic Acid Atoms
Solvent Atoms	90
Heterogen Atoms	50

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
ProDC	data collection
BEAST	phasing