Experiment: 5ODH

Heterodisulfide reductase / [NiFe]-hydrogenase complex from Methanothermococcus thermolithotrophicus soaked with heterodisulfide for 3.5 minutes

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	5ODC

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8.5	294	All crystallization was performed in an anaerobic chamber (95% N2/5% H2) with anoxic solution using the sitting drop method (96-well 2-drop MRC Crystallization Plates in polystyrene, Molecular Dimensions, Suffolk, UK). The crystallization reservoir contained 100 mM Tris/HCl, pH 8.5, 3% (v/v) DMSO, 30% (w/v) polyethylene glycol 4000, and 200 mM Na acetate trihydrate. Crystallization drop contained 1 ul HdrABC-MvhAGD at 25 mg/ml premixed with 2 mM FAD and 1 ul of precipitant. The crystals appeared after 1-2 weeks in this condition. The cryo-cool trapping experiment was performed as following: crystals were soaked for 3min30sec in the crystallization solution supplemented with 66 mM CoM-S-S-CoB. The crystal was cryo-protected by a soak in the crystallization solution supplemented by 30% glycerol and 10 mM CoM-S-S-CoB.

Crystal Properties
Matthews coefficient	Solvent content
2.18	43.5

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 366.381	α = 90
b = 97.104	β = 108.43
c = 133.974	γ = 90

Symmetry
Space Group	C 1 2 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		2016-06-23	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X10SA	0.97916	SLS	X10SA

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	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	2.2	48.552	99.8	0.141	0.073	0.992	8.4	4.8		225651

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.2	2.32	99.5		0.435	0.237	0.451		4.2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	MOLECULAR REPLACEMENT	THROUGHOUT	5ODC	2.2	48.552	1.34	225648	11273	99.81	0.2154	0.2138	0.2179	0.2447	0.247	40.4

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	18.043
f_angle_d	1.527
f_chiral_restr	0.148
f_bond_d	0.006
f_plane_restr	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	31029
Nucleic Acid Atoms
Solvent Atoms	610
Heterogen Atoms	469

Software

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