5M7J

Blastochloris viridis photosynthetic reaction center structure using best crystal approach


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 4CAS 

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1BATCH MODE293Melted monoolein was thoroughly mixed in a ratio of 3:2 (v/v) with 0.1M HEPES, pH 7.5, 0.1 % LDAO until a viscous, transparent LCP was obtained. The formed phase was then transferred into a glass vial and sponge-phase-inducing solution (1:4 ratio) was added containing 16% Jeffamine M-600, 1M HEPES pH 7.9, 0.7 M Ammonium sulphate, 2.5% 1,2,3-Heptanetriol, which swell the cubic phase to sponge phase. After phase separation overnight, the upper phase (sponge phase) was harvested. Crystals were grown using batch crystallization in the lipidic-sponge phase. Equal amount of sponge phase and protein were mixed with 2/5 (v/v) of 1.2 M Tris-sodium citrate and allowed to incubate for several weeks.
Crystal Properties
Matthews coefficientSolvent content
3.5164.95

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 57.9α = 90
b = 84.8β = 90
c = 384.3γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray293PIXELCS-PAD CXI-12011-02-19MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1FREE ELECTRON LASERSLAC LCLS BEAMLINE CXI1.32SLAC LCLSCXI

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
13.55899.46.15924815

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Cut-off Sigma (F)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTFREE R-VALUE4CAS3.552.7611.3424797128899.470.25420.25310.2731
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
KeyRefinement Restraint Deviation
f_dihedral_angle_d11.834
f_angle_d0.701
f_chiral_restr0.039
f_plane_restr0.004
f_bond_d0.003
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms9076
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms805

Software

Software
Software NamePurpose
PHENIXrefinement
CrystFELdata reduction