Experiment: 6HR7

HMG-CoA reductase from Methanothermococcus thermolithotrophicus apo form at 2.4 A resolution

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1DQ8

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8.5	291	HMGR was concentrated until 10 mg/ml by using an Amicon Ultra-4 Centrifugation filter (30 kDa cut-off) (Millipore) and centrifuged for 5 minute to remove any aggregates and dust. 0.7 ul of protein sample was spotted on a 96-well 2-drop MRC Crystallization Plates (Molecular Dimensions, Suffolk, UK) and 0.7 ul of reservoir solution was mixed. The best crystals were obtained after several month using a solution containing 40% v/v PEG 400, 100 mM Tris PH 8.5 and 200 mM Li2SO4.

Crystal Properties
Matthews coefficient	Solvent content
2.27	45.91

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 83.322	α = 90
b = 83.322	β = 90
c = 211.212	γ = 120

Symmetry
Space Group	P 31 1 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		2017-02-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID23-1	0.97662	ESRF	ID23-1

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	2.4	42.613	99.7	0.089	0.094	0.029	0.999	16.5	10.2		33184

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	2.4	2.53	100		1.177	1.236	0.375	0.634	2.1	10.8

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	FREE R-VALUE	1DQ8	2.4	42.613	1.36	33130	1631	99.67	0.1752	0.1727	0.1814	0.2198	0.2257	68.2

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	17.973
f_angle_d	0.843
f_chiral_restr	0.054
f_bond_d	0.007
f_plane_restr	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6050
Nucleic Acid Atoms
Solvent Atoms	41
Heterogen Atoms	69

Software

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