1E1H

Crystal Structure of recombinant Botulinum Neurotoxin Type A Light Chain, self-inhibiting Zn endopeptidase.

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3BTA	LC COORDINATES OF PDB ENTRY 3BTA

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.6		HANGING DROP VAPOUR DIFFUSION, DROP: 4UL 5MG/ML PROTEIN & 2UL WELL. PROTEIN: 0.05M TRIS PH 8.0,10% GLYCEROL, 0.1% TRITON X-100,1.0MM 2-ME,4% XYLITOL. WELL: 0.2M (NH4)2SO4,0.1M NAOAC PH 4.6, 25% PEG4000.

Crystal Properties
Matthews coefficient	Solvent content
2.91	53

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 58.064	α = 90
b = 94.263	β = 103.52
c = 100.156	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	125	CCD	ADSC CCD	DOUBLE FOCUSSING	2000-01-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 5.0.2		ALS	5.0.2

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	1.8	19.34	95.2	0.042	7.9	1.9		93168			24.47

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	1.8	1.9	95.2		0.383	1.7	1.9

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-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	LC COORDINATES OF PDB ENTRY 3BTA	1.8	19.34	92076	4649	95.2	0.196	0.237	RANDOM	31.5

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
p_transverse_tor	26.21
p_staggered_tor	16.95
p_planar_tor	5.21
p_scangle_it	5.051
p_scbond_it	3.454
p_mcangle_it	2.646
p_mcbond_it	1.904
p_multtor_nbd	0.276
p_chiral_restr	0.191
p_singtor_nbd	0.182
p_xyhbond_nbd	0.143
p_planar_d	0.027
p_bond_d	0.02
p_angle_d	0.019
p_plane_restr	0.018
p_angle_deg
p_hb_or_metal_coord
p_xhyhbond_nbd
p_orthonormal_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6460
Nucleic Acid Atoms
Solvent Atoms	768
Heterogen Atoms	2

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
EPMR	phasing