3ERA

RECOMBINANT ERABUTOXIN A (S8T MUTANT)

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.5		CRYSTALLIZATION WERE PERFORMED AT 291K BY THE HANGING DROP METHOD. DROPS OF 2 MICROLITRE OF 0.007M PROTEIN AND 2 MICROLITRE OF RESERVOIR WERE EQUILIBRATED AGAINST 0.32M NASCN, 0.05M NAOAC BUFFER SOLUTION (PH 4.5), vapor diffusion - hanging drop

Crystal Properties
Matthews coefficient	Solvent content
2.2	47

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 55.418	α = 90
b = 53.013	β = 90
c = 40.467	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	278	IMAGE PLATE	MARRESEARCH	MIRRORS	1995-07-07	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	LURE BEAMLINE DW32		LURE	DW32

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	1.7	13.9	99.4	0.069	9.7	3.4		13459		3	12.6

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)
	1.7	1.79	99.7		0.29	2.5	3.2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation 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	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR	THROUGHOUT	STRUCTURE OF RECOMBINANT ERABUTOXIN A (S8G MUTANT)	1.7	10	2	12566	1243	96.9	0.179	0.179	0.224	RANDOM	15.6

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
x_dihedral_angle_d	25.95
x_scangle_it	2.5
x_mcangle_it	2
x_scbond_it	2
x_angle_deg	1.59
x_mcbond_it	1.5
x_improper_angle_d	1.29
x_bond_d	0.006
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d_na
x_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	958
Nucleic Acid Atoms
Solvent Atoms	116
Heterogen Atoms	9

Software

Software
Software Name	Purpose
MOSFLM	data reduction
ROTAVATA	data reduction
X-PLOR	model building
X-PLOR	refinement
CCP4	data scaling
ROTAVATA	data scaling
X-PLOR	phasing