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DESIGNED PEPTIDE ALPHA-1, RACEMIC P1BAR FORM
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details other Direct methods (SHELXS)
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 8 EQUAL VOLUMES OF 10 MG/ML D-ALPHA-1 AND 10 MG/ML L-ALPHA-1 WERE MIXED IMMEDIATELY BEFORE CRYSTALLIZATION. THE RESERVOIR SOLUTION CONTAINED 90-93% 2-METHYL-2,4-PENTANEDIOL, 0.075 M ETHANOLAMINE HCL PH 9.75, 0.05 M TRIETHANOLAMINE HCL PH 8. THE HANGING DROP CONTAINED EQUAL VOLUMES OF RESERVOIR AND 10 MG/ML D,L MIX ALPHA-1. THE ACIDIC PEPTIDE PARTWAY TITRATES THE BASIC BUFFERS TO REACH THE UNKNOWN RESULTANT PH., vapor diffusion - hanging drop
Crystal Properties Matthews coefficient Solvent content 1.61 14.8
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 20.544 α = 101.16 b = 20.859 β = 97.03 c = 26.055 γ = 118.06
Diffraction Diffraction Experiment ID # Crystal ID Scattering Type Data Collection Temperature Detector Detector Type Details Collection Date Monochromator Protocol 1 1 x-ray 115 IMAGE PLATE MARRESEARCH 1996-06-01 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON NSLS BEAMLINE X12C NSLS X12C
Data Collection Overall ID # Resolution (High) Resolution (Low) Percent Possible (Observed) R Sym I (Observed) 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 0.75 18 71.5 10 10.6 1.4 33573 1
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) Percent Possible (Observed) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 1 0.75 0.78 24.9 2 1
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method Resolution (High) Resolution (Low) Number Reflections (All) Number Reflections (R-Free) Percent Reflections (Observed) R-Factor (All) R-Factor (Observed) R-Work (Depositor) R-Work (DCC) R-Free (Depositor) R-Free Selection Details Mean Isotropic B X-RAY DIFFRACTION DIRECT METHODS FREE R 0.75 18 33290 3329 71.6 0.131 0.13 0.1265 0.145 EVERY TENTH REFLECTION
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]
Coordinate Error Structure Solution Method Refinement High Resolution Refinement Low Resolution 11 250.04 237.88
RMS Deviations Key Refinement Restraint Deviation s_zero_chiral_vol 0.101 s_anti_bump_dis_restr 0.086 s_approx_iso_adps 0.04 s_bond_d 0.038 s_similar_adp_cmpnt 0.038 s_similar_dist 0.028 s_from_restr_planes 0.017 s_rigid_bond_adp_cmpnt 0.007 s_angle_d s_non_zero_chiral_vol
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 204 Nucleic Acid Atoms Solvent Atoms 21 Heterogen Atoms 16
Software Software Software Name Purpose SHELXS phasing SHELXL-97 refinement DENZO data reduction SCALEPACK data scaling