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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 26% PEG 400, 0.1M SODIUM ACETATE, 0.2M MAGNESIUM SULFATE, PH 4.6, VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 298K, pH 4.60
Crystal Properties Matthews coefficient Solvent content 3.3 62.77
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 109.253 α = 90 b = 109.253 β = 90 c = 84.387 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 2006-03-20 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON SLS BEAMLINE X06SA 0.94998 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 99.1 0.119 9.9 33189 -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 99.1 0.758 2.48
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 33395 31443 1670 99.16 0.21311 0.21311 0.211 0.2535 0.2783 RANDOM 37.304
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] 2.06 1.03 2.06 -3.08
RMS Deviations Key Refinement Restraint Deviation r_dihedral_angle_2_deg 30.985 r_dihedral_angle_4_deg 22.947 r_dihedral_angle_3_deg 16.649 r_scangle_it 6.277 r_dihedral_angle_1_deg 6.021 r_scbond_it 4.95 r_mcangle_it 3.16 r_mcbond_it 2.072 r_angle_refined_deg 1.857 r_nbtor_refined 0.339
RMS Deviations Key Refinement Restraint Deviation r_dihedral_angle_2_deg 30.985 r_dihedral_angle_4_deg 22.947 r_dihedral_angle_3_deg 16.649 r_scangle_it 6.277 r_dihedral_angle_1_deg 6.021 r_scbond_it 4.95 r_mcangle_it 3.16 r_mcbond_it 2.072 r_angle_refined_deg 1.857 r_nbtor_refined 0.339 r_symmetry_vdw_refined 0.284 r_nbd_refined 0.264 r_xyhbond_nbd_refined 0.138 r_chiral_restr 0.122 r_bond_refined_d 0.02 r_gen_planes_refined 0.008 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_refined 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 2670 Nucleic Acid Atoms Solvent Atoms 66 Heterogen Atoms 14
Software Software Software Name Purpose MOLREP phasing REFMAC refinement MAR345 data collection XDS data reduction XSCALE data scaling