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An unusual twin-His arrangement in the pore of ammonia channels is essential for substrate conductance
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 1XQF PDB Entry 1XQF
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, SITTING DROP 4.6 298 25% PEG 550, 0.1M sodium acetate, 0.2M ammonium sulfate, pH 4.6, VAPOR DIFFUSION, SITTING DROP, temperature 298K
Crystal Properties Matthews coefficient Solvent content 3.3 62.77
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 109.799 α = 90 b = 109.799 β = 90 c = 84.407 γ = 120
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 MARMOSAIC 225 mm CCD 2006-05-24 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON SLS BEAMLINE X06SA 0.98007 SLS X06SA
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 2.1 50 99.5 0.072 13.53 33648 -3
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) Percent Possible (Observed) R-Sym I (Observed) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 1 2.1 2.2 99.7 0.699 3.14
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method Starting model Resolution (High) Resolution (Low) Number Reflections (All) Number Reflections (Observed) Number Reflections (R-Free) Percent Reflections (Observed) R-Factor (All) R-Factor (Observed) R-Work (Depositor) R-Free (Depositor) R-Free (DCC) R-Free Selection Details Mean Isotropic B X-RAY DIFFRACTION MOLECULAR REPLACEMENT THROUGHOUT PDB Entry 1XQF 2.1 15 33825 31893 1702 99.63 0.16592 0.16592 0.16438 0.19549 0.2676 RANDOM 48.676
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] 1.03 0.51 1.03 -1.54
RMS Deviations Key Refinement Restraint Deviation r_dihedral_angle_2_deg 28.812 r_dihedral_angle_4_deg 20.658 r_dihedral_angle_3_deg 14.062 r_scangle_it 4.329 r_scbond_it 3.12 r_mcangle_it 1.979 r_dihedral_angle_1_deg 1.849 r_angle_refined_deg 1.397 r_mcbond_it 1.269 r_nbtor_refined 0.31
RMS Deviations Key Refinement Restraint Deviation r_dihedral_angle_2_deg 28.812 r_dihedral_angle_4_deg 20.658 r_dihedral_angle_3_deg 14.062 r_scangle_it 4.329 r_scbond_it 3.12 r_mcangle_it 1.979 r_dihedral_angle_1_deg 1.849 r_angle_refined_deg 1.397 r_mcbond_it 1.269 r_nbtor_refined 0.31 r_nbd_refined 0.205 r_symmetry_vdw_refined 0.177 r_symmetry_hbond_refined 0.172 r_xyhbond_nbd_refined 0.125 r_chiral_restr 0.11 r_bond_refined_d 0.012 r_gen_planes_refined 0.009
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 2639 Nucleic Acid Atoms Solvent Atoms 94 Heterogen Atoms 15
Software Software Software Name Purpose REFMAC refinement MAR345 data collection XDS data reduction XSCALE data scaling MOLREP phasing