Experiment: 8DF7

Structure of M. kandleri topoisomerase V in complex with DNA. 38 base pair symmetric DNA complex

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.1	303	Protein was mixed with the annealed oligonucleotide using a stoichiometric ratio of 1.25:1 DNA to protein in 1X DNA binding buffer. Reactions were incubated for thirty minutes at 65 C. Crystals started to appear within minutes of setting up the trays in 1:1 or 2:1 well to complex ratio. Well solution: 2% PEG 8K, 24 mM sodium acetate pH 5.1, 26 mM sodium acetate pH 5.5, 12.5 uM phosphotungstic acid

Crystal Properties
Matthews coefficient	Solvent content
4.24	70.97

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 121.665	α = 90
b = 121.665	β = 90
c = 498.82	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	RAYONIX MX-300	Monochromator	2019-08-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 21-ID-F	0.97872	APS	21-ID-F

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	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	3.52	59.1	87.5	0.121	0.128	0.997	12	9.5		41745			107.22

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.52	3.73	28.2		1.183	1.289	0.633	1.7	6.5

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	SIRAS	FREE R-VALUE	3.52	59.1	1.33	41720	2127	87.44	0.2313	0.229	0.263	0.2748	0.2821	128.74

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	16.2333
f_angle_d	0.4269
f_chiral_restr	0.0341
f_plane_restr	0.0032
f_bond_d	0.0019

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	13604
Nucleic Acid Atoms	1559
Solvent Atoms
Heterogen Atoms	5

Software

Software
Software Name	Purpose
BUSTER	refinement
PHENIX	refinement
XDS	data reduction
STARANISO	data scaling
SHARP	phasing