2WJM

Lipidic sponge phase crystal structure of the photosynthetic reaction centre from Blastochloris viridis (low dose)


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 2PRCPDB ENTRY 2PRC

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1LIPIDIC CUBIC PHASE8MONOOLEIN WAS MIXED WITH WATER IN RATIO OF 60:40 (W/W) UNTIL A VISCOUS NON-BIREFRINGENT LCP WAS FORMED. THEREAFTER, LIPIDIC-SPONGE PHASE INITIATING SOLUTION (20% JEFFAMINE M600, 1M HEPES PH=8.0, 0.7M (NH4)2SO4 AND 2.5% 1,2,3-HEPTANETRIOL) WAS ADDED IN A RATIO OF 1 TO 4 (V/V) AND EQUILIBRATED UNTIL PHASE SEPARATION HAS OCCURRED. THE UPPER LIPIDIC-SPONGE PHASE WAS HARVESTED AND 1UL WAS USED AS A PRECIPITANT SOLUTION TOGETHER WITH 1UL OF 25 MG/ML PROTEIN SOLUTION IN A HANGING-DROP, VAPOUR-DIFFUSION EXPERIMENT. TO IMPROVE CRYSTAL QUALITY 1UL OF ADDITIVE 1M TRI-NA-CITRATE HAS BEEN ADDED TO THE CRYSTALLIZATION DROP.
Crystal Properties
Matthews coefficientSolvent content
2.6754

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 84.45α = 90
b = 138.498β = 90
c = 177.77γ = 90
Symmetry
Space GroupP 21 21 2

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC CCDMIRRORS2007-02-08MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONESRF BEAMLINE ID14-3ESRFID14-3

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (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
11.9545.996.20.0910.94.3152112225.1
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
11.952.0686.40.732.13.6

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUTPDB ENTRY 2PRC1.95176.78138487731395.850.174460.173050.20122RANDOM26.466
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]
-0.022.93-2.91
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg31.385
r_dihedral_angle_4_deg15.405
r_dihedral_angle_3_deg13.104
r_dihedral_angle_1_deg6.595
r_scangle_it2.415
r_angle_refined_deg2.09
r_scbond_it1.732
r_mcangle_it1.101
r_angle_other_deg0.972
r_mcbond_it0.707
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg31.385
r_dihedral_angle_4_deg15.405
r_dihedral_angle_3_deg13.104
r_dihedral_angle_1_deg6.595
r_scangle_it2.415
r_angle_refined_deg2.09
r_scbond_it1.732
r_mcangle_it1.101
r_angle_other_deg0.972
r_mcbond_it0.707
r_nbd_refined0.21
r_symmetry_hbond_refined0.21
r_nbd_other0.199
r_mcbond_other0.191
r_nbtor_refined0.189
r_symmetry_vdw_other0.151
r_xyhbond_nbd_refined0.137
r_symmetry_vdw_refined0.124
r_chiral_restr0.088
r_nbtor_other0.088
r_bond_refined_d0.017
r_gen_planes_refined0.007
r_gen_planes_other0.004
r_bond_other_d0.002
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms9187
Nucleic Acid Atoms
Solvent Atoms711
Heterogen Atoms764

Software

Software
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing