1GUJ

Insulin at pH 2: structural analysis of the conditions promoting insulin fibre formation.


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP2.1HANGING DROP VAPOUR DIFFUSION METHOD PROTEIN SOL: 5 MG/ML HUMAN INSULIN IN SULPHURIC ACID PH 2.1 RESERVOIR SOL: SULPHURIC ACID PH 2.1,0.025 M SODIUM SULPHATE
Crystal Properties
Matthews coefficientSolvent content
2.245

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 44.046α = 90
b = 46.177β = 90
c = 51.194γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray120CCDMARRESEARCHMIRRORSMSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONESRF BEAMLINE ID14-1ESRFID14-1

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
11.63201000.0436513079
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)
11.631.661000.24595

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 REPLACEMENTTHROUGHOUT4INS1.6234.31307968999.20.1720.170.207RANDOM19.74
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]
0.270.4-0.67
RMS Deviations
KeyRefinement Restraint Deviation
r_scangle_it4.242
r_scbond_it2.81
r_mcangle_it2.002
r_angle_other_deg1.659
r_mcbond_it1.232
r_symmetry_hbond_refined0.244
r_nbd_refined0.211
r_xyhbond_nbd_refined0.2
r_symmetry_vdw_refined0.196
r_chiral_restr0.114
RMS Deviations
KeyRefinement Restraint Deviation
r_scangle_it4.242
r_scbond_it2.81
r_mcangle_it2.002
r_angle_other_deg1.659
r_mcbond_it1.232
r_symmetry_hbond_refined0.244
r_nbd_refined0.211
r_xyhbond_nbd_refined0.2
r_symmetry_vdw_refined0.196
r_chiral_restr0.114
r_bond_refined_d0.013
r_gen_planes_refined0.006
r_symmetry_metal_ion_other
r_nbtor_refined
r_nbtor_other
r_gen_planes_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_bond_other_d
r_symmetry_vdw_other
r_dihedral_angle_4_deg
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_nbd_other
r_dihedral_angle_3_deg
r_mcbond_other
r_dihedral_angle_2_deg
r_mcangle_other
r_dihedral_angle_1_deg
r_scbond_other
r_angle_refined_deg
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 Atoms810
Nucleic Acid Atoms
Solvent Atoms127
Heterogen Atoms10

Software

Software
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing