7X41

Crystal structure of chlorotoxin, a glioma specific scorpion toxin

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP		293	1 M monosodium phosphate and 0.75 M sodium citrate

Crystal Properties
Matthews coefficient	Solvent content
1.55	20.88

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 22.335	α = 90
b = 26.008	β = 90
c = 47.23	γ = 90

Symmetry
Space Group	P 21 21 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	ADSC QUANTUM 315r		2016-06-25	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSRRC BEAMLINE BL13C1	0.97622	NSRRC	BL13C1

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	1.15	30	99.7	0.04	51.1	5.5		10293

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	1.15	1.19			0.09

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1CHL	1.15	23.615	10253	511	99.66	0.145	0.1445	0.1574	6.327

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]
0.086			0.082		-0.168

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.437
r_dihedral_angle_3_deg	9.325
r_dihedral_angle_1_deg	8.359
r_dihedral_angle_4_deg	5.777
r_angle_other_deg	1.528
r_angle_refined_deg	1.451
r_lrange_it	1.01
r_lrange_other	0.909
r_rigid_bond_restr	0.87
r_scangle_it	0.662
r_scangle_other	0.662
r_scbond_it	0.561
r_scbond_other	0.545
r_mcangle_it	0.397
r_mcangle_other	0.396
r_mcbond_it	0.293
r_mcbond_other	0.273
r_nbd_refined	0.211
r_symmetry_nbd_other	0.188
r_symmetry_nbd_refined	0.176
r_nbtor_refined	0.166
r_nbd_other	0.161
r_xyhbond_nbd_refined	0.095
r_chiral_restr	0.083
r_symmetry_nbtor_other	0.082
r_symmetry_xyhbond_nbd_refined	0.078
r_bond_refined_d	0.009
r_gen_planes_refined	0.007
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	274
Nucleic Acid Atoms
Solvent Atoms	34
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
HKL-3000	phasing