2BR8

Crystal Structure of Acetylcholine-binding Protein (AChBP) from Aplysia californica in complex with an alpha-conotoxin PnIA variant


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1UX2PDB ENTRY 1UX2

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
17.518 % PEG 3350, 180 MM NA2SO4, 100 MM BIS-TRIS PROPANE PH 7.5
Crystal Properties
Matthews coefficientSolvent content
2.957.5

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 67.473α = 90
b = 80.085β = 93.2
c = 134.043γ = 90
Symmetry
Space GroupP 1 21 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC CCD2004-09-30MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONESRF BEAMLINE ID14-2ESRFID14-2

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
12.45097.90.163.45552631.8
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)
12.42.5290.40.41.82.98

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 1UX22.419.851866278397.80.2010.1980.25RANDOM31.99
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]
-0.110.020.050.06
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg39.057
r_dihedral_angle_4_deg19.245
r_dihedral_angle_3_deg17.156
r_dihedral_angle_1_deg7.205
r_scangle_it1.824
r_angle_refined_deg1.532
r_scbond_it1.148
r_mcangle_it0.811
r_mcbond_it0.489
r_symmetry_vdw_refined0.445
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg39.057
r_dihedral_angle_4_deg19.245
r_dihedral_angle_3_deg17.156
r_dihedral_angle_1_deg7.205
r_scangle_it1.824
r_angle_refined_deg1.532
r_scbond_it1.148
r_mcangle_it0.811
r_mcbond_it0.489
r_symmetry_vdw_refined0.445
r_nbtor_refined0.308
r_nbd_refined0.223
r_xyhbond_nbd_refined0.158
r_symmetry_hbond_refined0.124
r_chiral_restr0.09
r_bond_refined_d0.012
r_gen_planes_refined0.005
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_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_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 Atoms8750
Nucleic Acid Atoms
Solvent Atoms235
Heterogen Atoms25

Software

Software
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing