6HUZ

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

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	6HUY

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
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