4KTX

Crystal structure of the catalytic domain of botulinum neurotoxin BoNT/A C134S mutant with covalent inhibitor that modifies Cys-165 causing disorder in 167-174 stretch

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6	293	Protein - preformed complex LCA_C134S-KG13 at 10 mg/mL, Reservoir - 4% PEG 4000, 0.1 M imidazole malate, Cryoprotectant 40% CryoProtX CM3, 18% MPEG 2K, 0.1 M PCTP (Na propionate, Na cacodylate, Bis-Tris-propane) (50% pH 4 / 50% pH 9.5), VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.09	41.17

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 65.41	α = 90
b = 65.41	β = 90
c = 200.97	γ = 90

Symmetry
Space Group	P 43 21 2

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	MIRRORS	2011-06-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID23-1		ESRF	ID23-1

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	2.59	50	99.2	0.446	0.439	9.03	12.76		14292		-3	53.11

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	2.59	2.74	95.5		2.479	2.377	1.34	12.4

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	4ELC	2.59	46.8	2.01	14292	14291	715	99.3	0.207	0.202	0.298

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
f_dihedral_angle_d	16.137
f_angle_d	1.458
f_chiral_restr	0.057
f_bond_d	0.01
f_plane_restr	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3499
Nucleic Acid Atoms
Solvent Atoms	134
Heterogen Atoms	29

Software

Software
Software Name	Purpose
PHENIX	refinement
REFMAC	refinement
DNA	data collection
XDS	data reduction
XDS	data scaling
REFMAC	phasing

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.