4NEC

Conversion of a Disulfide Bond into a Thioacetal Group during Echinomycin Biosynthesis

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
in silico model		AMPLE generated Ensemble model from ROSETTA decoys

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.1	293	0.1M sodium cacodylate pH 6.1, 0.2M sodium acetate trihydrate, 30% (w/v) PEG 8000, 14% (v/v) ethylene glycol, 2.7% (w/v) sucrose, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.07	40.55

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 58.187	α = 90
b = 146.88	β = 102.63
c = 58.187	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	100	PIXEL	DECTRIS PILATUS 6M		2011-12-10	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 17-ID	1.00	APS	17-ID

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	1.5	48.96	99.7	0.114	5.4	3.1		151355			22

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 (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	AMPLE generated Ensemble model from ROSETTA decoys	1.5	45.42	143561	7689	99.68	0.15248	0.15042	0.16	0.19016	0.19	RANDOM	18.066

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]
2.57		-5.44	-0.5		-2.06

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.645
r_sphericity_free	23.373
r_dihedral_angle_3_deg	12.151
r_dihedral_angle_4_deg	11.357
r_sphericity_bonded	7.748
r_dihedral_angle_1_deg	5.52
r_long_range_B_refined	2.454
r_long_range_B_other	2.452
r_scangle_other	1.777
r_mcangle_it	1.729
r_mcangle_other	1.729
r_scbond_it	1.491
r_scbond_other	1.49
r_mcbond_it	1.362
r_mcbond_other	1.362
r_angle_refined_deg	1.17
r_rigid_bond_restr	0.807
r_angle_other_deg	0.709
r_chiral_restr	0.061
r_bond_refined_d	0.005
r_gen_planes_refined	0.004
r_gen_planes_other	0.002
r_bond_other_d	0.001
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7392
Nucleic Acid Atoms
Solvent Atoms	320
Heterogen Atoms	245

Software

Software
Software Name	Purpose
MOSFLM	data reduction
AMPLE	phasing
REFMAC	refinement
Aimless	data scaling
SCALA	data scaling