6TSB

Crystal structure of the Chitinase Domain of the Spore Coat Protein CotE from Clostridium difficile

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.5	291	Reservoir, 1 ml 0.1 M sodium malonate pH 5.5, 13% PEG 3,350 and 3 microlitres of pentaethylene glycol monooctyl ether (C8E5) Drops contained 2 microlitres of protein at 20 mg/ml in 50 mM Tris-HCl, pH 7.5, 500 mM NaCl, 10 mM imidazole, a 3 microlitres of reservoir solution.

Crystal Properties
Matthews coefficient	Solvent content
3.89	68.35

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 82.076	α = 90
b = 82.076	β = 90
c = 325.883	γ = 120

Symmetry
Space Group	P 61 2 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	PIXEL	DECTRIS PILATUS3 S 6M		2017-01-14	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I03	0.9763	Diamond	I03

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	CC (Half)	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	2.17	81.41	100	1	9.5	18.3		35657

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.17	2.17			0.64

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-Factor (All)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	6T9M	2.1	54.373	39192	1918	99.957	0.219	0.2163	0.2674	54.348

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]
-0.001	-0.001		-0.001		0.005

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.317
r_lrange_it	30.8
r_lrange_other	30.797
r_dihedral_angle_3_deg	15.81
r_dihedral_angle_4_deg	14.717
r_dihedral_angle_1_deg	7.483
r_scangle_it	7.218
r_scangle_other	7.216
r_mcangle_it	7.017
r_mcangle_other	7.016
r_scbond_it	4.903
r_scbond_other	4.901
r_mcbond_it	4.847
r_mcbond_other	4.847
r_angle_other_deg	2.376
r_angle_refined_deg	1.64
r_symmetry_xyhbond_nbd_refined	0.338
r_xyhbond_nbd_refined	0.263
r_nbd_other	0.247
r_symmetry_nbd_other	0.221
r_nbd_refined	0.212
r_symmetry_nbd_refined	0.175
r_nbtor_refined	0.17
r_symmetry_xyhbond_nbd_other	0.097
r_symmetry_nbtor_other	0.073
r_chiral_restr	0.071
r_bond_other_d	0.036
r_bond_refined_d	0.009
r_gen_planes_other	0.009
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2699
Nucleic Acid Atoms
Solvent Atoms	138
Heterogen Atoms	14

Software

Software
Software Name	Purpose
REFMAC	refinement
xia2	data reduction
Aimless	data scaling
MOLREP	phasing