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Crystal structure of Interferon alpha2 bound to IFA001 Fab
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 6PHG experimental model PDB 4FQJ experimental model PDB 4U6G experimental model PDB 6KVA
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, SITTING DROP 4 298 1:1 drop ratio of protein complex to well reservoir.
Well reservoir:
10% v/v 2-Propanol,
0.1 M Sodium acetate trihydrate pH 4.0,
22% w/v Polyethylene glycol 6,000
Crystal Properties Matthews coefficient Solvent content 2.17 43.36
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 37.732 α = 100.202 b = 63.444 β = 97.261 c = 130.26 γ = 91.06
Diffraction Diffraction Experiment ID # Crystal ID Scattering Type Data Collection Temperature Detector Detector Type Details Collection Date Monochromator Protocol 1 1 x-ray 100 PIXEL DECTRIS EIGER X 16M 2025-12-13 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON SSRL BEAMLINE BL12-1 0.97946 SSRL BL12-1
Data Collection Overall ID # Resolution (High) Resolution (Low) Percent Possible (Observed) R Merge I (Observed) Rrim I (All) Rpim I (All) CC (Half) Net I Over Average Sigma (I) Redundancy Number Reflections (All) Number Reflections (Observed) Observed Criterion Sigma (F) Observed Criterion Sigma (I) B (Isotropic) From Wilson Plot 1 2.8 38.43 92.3 0.285 0.335 0.173 0.824 4.7 3.8 26804 25.59
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) Percent Possible (Observed) R Merge I (Observed) Rrim I (All) Rpim I (All) CC (Half) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 1 2.8 2.95 93.8 0.992 1.182 0.634 0.333 2.4 3.7
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method Resolution (High) Resolution (Low) Cut-off Sigma (F) Number Reflections (Observed) Number Reflections (R-Free) Percent Reflections (Observed) R-Factor (Observed) R-Work (Depositor) R-Work (DCC) R-Free (Depositor) R-Free (DCC) Mean Isotropic B X-RAY DIFFRACTION MOLECULAR REPLACEMENT FREE R-VALUE 2.8 38.43 1.96 26513 1991 91.36 0.2252 0.2208 0.2206 0.2787 0.2782 33.25
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]
RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 11.5833 f_angle_d 0.6147 f_chiral_restr 0.0429 f_plane_restr 0.0052 f_bond_d 0.0038
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 8494 Nucleic Acid Atoms Solvent Atoms Heterogen Atoms 28
Software Software Software Name Purpose PHENIX refinement XDS data reduction Aimless data scaling PHASER phasing