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The 2.0 Angstrom Resolution Crystal Structure of HetL, a Pentapeptide Repeat Protein involved in Heterocyst Differentiation Regulation from the Cyanobacterium Nostoc sp. Strain PCC 7120
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 7.5 295 0.1M HEPES, 0.7M sodium phosphate monobasic, 0.7M potassium phosphate monobasic, 12.5% glycerol, protein concentration 7.5 mg/ml, VAPOR DIFFUSION, HANGING DROP, temperature 295K
Crystal Properties Matthews coefficient Solvent content 2.92 57.81
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 68.2 α = 90 b = 93.763 β = 90 c = 101.307 γ = 90
Symmetry Space Group I 2 2 2
Diffraction Diffraction Experiment ID # Crystal ID Scattering Type Data Collection Temperature Detector Detector Type Details Collection Date Monochromator Protocol 1 1 x-ray 100 CCD BRUKER SMART 6000 mirrors 2008-02-13 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 ROTATING ANODE BRUKER AXS MICROSTAR 1.54
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 1.77 68.84 89.9 0.041 61.22 38.58 32008 28767 3
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) Percent Possible (Observed) R Merge I (Observed) R-Sym I (Observed) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 1 1.77 1.87 58.3 0.3 0.3 4.63 38.58
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method Resolution (High) Resolution (Low) Number Reflections (Observed) Number Reflections (R-Free) Percent Reflections (Observed) R-Factor (Observed) R-Work (Depositor) R-Free (Depositor) R-Free (DCC) R-Free Selection Details Mean Isotropic B X-RAY DIFFRACTION sulfur anomalous scattering THROUGHOUT 2 28.41 20737 1101 97.81 0.1773 0.17586 0.2042 0.2129 RANDOM 17.67
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] -0.33 0.49 -0.15
RMS Deviations Key Refinement Restraint Deviation r_dihedral_angle_2_deg 24.097 r_dihedral_angle_3_deg 15.472 r_dihedral_angle_4_deg 12.169 r_scangle_it 4.76 r_dihedral_angle_1_deg 4.654 r_scbond_it 3.083 r_mcangle_it 1.511 r_angle_refined_deg 1.344 r_mcbond_it 0.965 r_symmetry_vdw_refined 0.517
RMS Deviations Key Refinement Restraint Deviation r_dihedral_angle_2_deg 24.097 r_dihedral_angle_3_deg 15.472 r_dihedral_angle_4_deg 12.169 r_scangle_it 4.76 r_dihedral_angle_1_deg 4.654 r_scbond_it 3.083 r_mcangle_it 1.511 r_angle_refined_deg 1.344 r_mcbond_it 0.965 r_symmetry_vdw_refined 0.517 r_nbtor_refined 0.308 r_nbd_refined 0.219 r_xyhbond_nbd_refined 0.146 r_symmetry_hbond_refined 0.133 r_chiral_restr 0.096 r_bond_refined_d 0.014 r_gen_planes_refined 0.005 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_rigid_bond_restr r_sphericity_free r_sphericity_bonded
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 1798 Nucleic Acid Atoms Solvent Atoms 238 Heterogen Atoms
Software Software Software Name Purpose REFMAC refinement PROTEUM PLUS data collection SAINT data reduction SADABS data scaling SHELXS phasing