2B22

Antiparallel four-stranded coiled coil specified by a 3-3-1 hydrophobic heptad repeat


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 2B1FPDB ENTRY 2B1F

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP4.6295PEG 400, cadmium chloride, sodium acetate, pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 295K
Crystal Properties
Matthews coefficientSolvent content
1.930

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 45.985α = 90
b = 45.985β = 90
c = 52.987γ = 90
Symmetry
Space GroupI 41 2 2

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC QUANTUM 42005-04-15MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONNSLS BEAMLINE X4A0.9792NSLSX4A

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
1234.798.30.04316.58.82063206341.3
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)
122.071000.3926.59.2199

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (All)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUTPDB ENTRY 2B1F234.72063206328498.30.230750.230750.223690.27629RANDOM54.231
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]
0.910.91-1.82
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg57.326
r_dihedral_angle_3_deg24.811
r_scangle_it11.925
r_dihedral_angle_4_deg11.355
r_dihedral_angle_1_deg7.392
r_scbond_it7.273
r_mcangle_it4.165
r_angle_refined_deg3.173
r_mcbond_it1.982
r_metal_ion_refined0.637
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg57.326
r_dihedral_angle_3_deg24.811
r_scangle_it11.925
r_dihedral_angle_4_deg11.355
r_dihedral_angle_1_deg7.392
r_scbond_it7.273
r_mcangle_it4.165
r_angle_refined_deg3.173
r_mcbond_it1.982
r_metal_ion_refined0.637
r_symmetry_hbond_refined0.371
r_symmetry_vdw_refined0.364
r_nbtor_refined0.34
r_nbd_refined0.32
r_chiral_restr0.245
r_symmetry_metal_ion_refined0.202
r_bond_refined_d0.042
r_xyhbond_nbd_refined0.03
r_gen_planes_refined0.012
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms237
Nucleic Acid Atoms
Solvent Atoms5
Heterogen Atoms2

Software

Software
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing