2OAR

Mechanosensitive Channel of Large Conductance (MscL)

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	3.7		PROTEIN CONCENTRATION 15-20 MG/ML AND 0.05% DODECYLMALTOSIDE.PROTEIN WAS MIXED IN A RATIO OF 4:3 OR 3:2 WITH THE RESERVOIR SOLUTION CONTAINING 100-120 mM AMMONIUM SULFUATE, 23-27% TRIETHYLENE GLYCOL, 100 mM GLYCINE, WITH 1-3 mM GD(CL)3 OR SM(CL)3 AND D2O AS THE SOLVENT. 1 mM (NA3)AU(S2O3)2 WAS SOAKED INTO THE CRYSTAL, pH 3.7, VAPOR DIFFUSION, SITTING DROP

Crystal Properties
Matthews coefficient	Solvent content
5.9	78.97

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 212.308	α = 90
b = 212.308	β = 90
c = 97.68	γ = 90

Symmetry
Space Group	I 41

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	IMAGE PLATE	MARRESEARCH			M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-1		SSRL	BL9-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym I (Observed)	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	3.5	20		0.103	12.6	2.7		25597

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.5	3.6	50.4		0.458	1	1.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MIR	3.5	20	1	25558	1234	93.2	0.319	0.319	0.338	135.31

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]
21.25			21.25		-42.5

RMS Deviations
Key	Refinement Restraint Deviation
c_mcangle_it	4.656
c_scangle_it	4.371
c_mcbond_it	2.529
c_scbond_it	2.423
c_angle_deg	1.91
c_bond_d	0.012
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4755
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	3

Software

Software
Software Name	Purpose
CNS	refinement
PDB_EXTRACT	data extraction
DENZO	data reduction
SCALEPACK	data scaling