6HUZ

HmdII from Desulfurobacterium thermolithotrophum reconstituted with Fe-guanylylpyridinol (FeGP) cofactor and co-crystallized with methenyl-tetrahydrofolate form B

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	5.5	281	HmdII from Desulfurobacterium thermolithotrophum was reconstituted with the Fe-guanylylpyridinol cofactor from Methanothermobacter marburgensis and co-crystallized with methenyl-tetrahydrofolate using the sitting drop vapor diffusion method under N2/H2 (95%/5%) in red light condition. The reconstituted holoenzyme was mixed with methenyl-H4F+ at the final concentrations of 1.6 mM. Methenyl-tetrahydrofolate was dissolved in 10% DMSO, and the final concentration of DMSO in the protein solution was 1.6%. 0.7 ul of dHmdII at 21 mg/ml (reconstituted with FeGP and methenyl-H4F+) was spotted on a 96-well 2-drop MRC Crystallization Plates (Molecular Dimensions, Suffolk, UK) and 0.7 ul of reservoir solution was mixed. After one month, crystals appeared in 20% PEG 3000 (w/v) and 100 mM Sodium Citrate pH 5.5 (from the kit WIZARD, Jena Bioscience). The crystals were cryoprotected by a soak of few seconds in 20% PEG 3000 (w/v), 100 mM Tri-Sodium Citrate pH 5.5 and 20% glycerol before a flash freeze in liquid nitrogen

Crystal Properties
Matthews coefficient	Solvent content
2.58	52.43

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 65.2	α = 90
b = 132.02	β = 90
c = 49.16	γ = 90

Symmetry
Space Group	P 21 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	PIXEL	DECTRIS PILATUS 6M		2018-06-07	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SOLEIL BEAMLINE PROXIMA 1	0.97857	SOLEIL	PROXIMA 1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim 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	1.85	49.16	99.9	0.085	0.092	0.036	0.998	10.2	6.5		37060			32.15

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.85	1.95	99.7		1.212	1.317	0.511	0.849	1.2	6.6

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	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	6HUY	1.85	46.39	36480	1812	98.4	0.196	0.195	0.223	RANDOM	44.11

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]
-1.3291			-0.4571		1.7863

RMS Deviations
Key	Refinement Restraint Deviation
t_other_torsion	15.23
t_omega_torsion	1.75
t_angle_deg	1.14
t_bond_d	0.01
t_dihedral_angle_d
t_incorr_chiral_ct
t_pseud_angle
t_trig_c_planes
t_gen_planes
t_it

RMS Deviations
Key	Refinement Restraint Deviation
t_other_torsion	15.23
t_omega_torsion	1.75
t_angle_deg	1.14
t_bond_d	0.01
t_dihedral_angle_d
t_incorr_chiral_ct
t_pseud_angle
t_trig_c_planes
t_gen_planes
t_it
t_nbd
t_improper_torsion
t_chiral_improper_torsion
t_sum_occupancies
t_utility_distance
t_utility_angle
t_utility_torsion
t_ideal_dist_contact

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2739
Nucleic Acid Atoms
Solvent Atoms	281
Heterogen Atoms	93

Software

Software
Software Name	Purpose
BUSTER	refinement
XDS	data reduction
SCALA	data scaling
PHASER	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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.