3UIA

Structural Determinants of Trimerization Specificity in HIV-1 gp41 Protein


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP8.629834% MPD, 0.2M ammonium dihydrogen phosphate, 0.1M Tris, pH 8.6, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 78.027α = 90
b = 76.316β = 104.86
c = 65.731γ = 90
Symmetry
Space GroupC 1 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC QUANTUM 42007-05-07MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONNSLS BEAMLINE X4A0.97927NSLSX4A

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
1263.599.20.0614.73.7253392533936.1
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)
122.0799.50.4312.73.52541

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 3U91263.52533925339129199.50.213780.213780.211560.25227RANDOM54.072
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]
-0.44-2.671.27-2.21
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg38.378
r_dihedral_angle_4_deg21.244
r_dihedral_angle_3_deg15.091
r_scangle_it5.79
r_dihedral_angle_1_deg5.113
r_scbond_it3.882
r_mcangle_it2.035
r_angle_refined_deg1.886
r_mcbond_it1.359
r_nbtor_refined0.311
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg38.378
r_dihedral_angle_4_deg21.244
r_dihedral_angle_3_deg15.091
r_scangle_it5.79
r_dihedral_angle_1_deg5.113
r_scbond_it3.882
r_mcangle_it2.035
r_angle_refined_deg1.886
r_mcbond_it1.359
r_nbtor_refined0.311
r_symmetry_vdw_refined0.268
r_nbd_refined0.228
r_symmetry_hbond_refined0.175
r_xyhbond_nbd_refined0.162
r_chiral_restr0.136
r_bond_refined_d0.026
r_gen_planes_refined0.009
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms1299
Nucleic Acid Atoms
Solvent Atoms148
Heterogen Atoms33

Software

Software
Software NamePurpose
ADSCdata collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling