1T7E

Crystal structure of mutant Pro9Ser of scorpion alpha-like neurotoxin BmK M1 from Buthus martensii Karsch

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.6	293	Sodium phosphate, PEG400, pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.3	46.5

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 46.907	α = 90
b = 46.907	β = 90
c = 53.748	γ = 120

Symmetry
Space Group	P 32 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	283	CCD	ADSC QUANTUM 4		2000-11-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PHOTON FACTORY BEAMLINE BL-18B	1.0	Photon Factory	BL-18B

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	1.4	30	100	0.053	0.053	7.9	7	13889	13889			20.4

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	1.4	1.48	100		0.355	0.355	2	4.7	1988

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 1SN1	1.4	19	13889	13889	1405	100	0.19494	0.19494	0.1924	0.21589	RANDOM	15.27

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]
-0.2	-0.1		-0.2		0.3

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_3_deg	13.425
r_dihedral_angle_1_deg	4.658
r_scangle_it	4.106
r_scbond_it	2.794
r_mcangle_it	2.141
r_angle_refined_deg	1.669
r_mcbond_it	1.151
r_angle_other_deg	0.748
r_symmetry_vdw_refined	0.5
r_symmetry_vdw_other	0.228
r_nbd_other	0.206
r_nbd_refined	0.199
r_symmetry_hbond_refined	0.174
r_xyhbond_nbd_refined	0.155
r_chiral_restr	0.097
r_bond_refined_d	0.013
r_gen_planes_refined	0.008
r_gen_planes_other	0.003
r_bond_other_d	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	520
Nucleic Acid Atoms
Solvent Atoms	51
Heterogen Atoms	15

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing