1AF9

TETANUS NEUROTOXIN C FRAGMENT

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5		CRYSTALLIZATION DROP CONTAINED 3 PARTS RESERVOIR SOLUTION AND 1 PART PROTEIN SOLUTION. RESERVOIR: 14%- 18% PEG 4000, 0.1M IMIDAZOLE, 0.05M MGCL2 AT PH 6.5. PROTEIN SOLUTION: 10MG/ML PROTEIN AND 0.01M TRIS-HCL AT PH 7.8.

Crystal Properties
Matthews coefficient	Solvent content
2.45	47

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 67.4	α = 90
b = 79.7	β = 90
c = 91.1	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	291	AREA DETECTOR	SIEMENS	SUPPER DOUBLE MIRRORS	1994-08-19	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RUH2R

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	2.6	35	91.6	0.066	0.076	54.8	3.3		14445		1	12.9

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.6	2.7	59.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	MIRAS	THROUGHOUT	2.7	8	2	12771	1301	95.4	0.161	0.161	0.245	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	27.4
x_angle_deg	1.7
x_improper_angle_d	1.5
x_bond_d	0.012
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
x_mcbond_it
x_mcangle_it
x_scbond_it
x_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3564
Nucleic Acid Atoms
Solvent Atoms	138
Heterogen Atoms

Software

Software
Software Name	Purpose
PHASES	phasing
X-PLOR	model building
X-PLOR	refinement
XENGEN	data reduction
WEISSMAN'S	data scaling
X-PLOR	phasing