X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 5
Details CITRIC ACID, AMMONIUM SULFATE, PH 5.0, VAPOUR DIFFUSION, HANGING DROP AT 298K

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 75.81 α = 90
b = 75.81 β = 90
c = 70.12 γ = 120
Symmetry
Space Group P 61

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 130
Diffraction Detector
Detector Diffraction Type Details Collection Date
CCD ADSC MIRRORS 2002-03-15
Diffraction Radiation
Monochromator Protocol
SI INTERCHANGEABLE MAD
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
SYNCHROTRON SRS BEAMLINE PX14.2 0.9600, 0.9780, 0.9786 SRS PX14.2

Data Collection

Overall
Resolution (High) Resolution (Low) Percent Possible (Observed) R Merge I (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
1.69 37.3 100.0 0.054 -- -- 16.6 -- 24609 -- -- --
High Resolution Shell
Resolution (High) Resolution (Low) Percent Possible (All) R Merge I (Observed) R-Sym I (Observed) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All)
1.69 1.73 100.0 0.352 -- 2.2 16.5 --

Refinement

Statistics
Structure Solution Method Refinement High Resolution Refinement Low Resolution Cut-off Sigma (I) Cut-off Sigma (F) Number of Reflections (All) Number of Reflections (Observed) Number of Reflections (R-Free) Percent Reflections (Observed) R-Factor (All) R-Factor (Observed) R-Work R-Free R-Free Selection Details
MAD 1.2 65.0 -- -- -- 67603 3605 99.8 -- 0.193 0.191 0.219 RANDOM
High Resolution Shell
Refinement method Shell Resolution (High) Shell Resolution (Low) # of Reflections (Observed) # of Reflections (R-Free) # of Reflections (R-Work) R-Factor (R-Work) R-Factor (R-Free) R-Factor (R-Free Error) Percent Reflections (Observed)
X Ray Diffraction 1.2 1.23 -- 255 5006 0.343 0.356 -- --
Temperature Factor Modeling
Temperature Factor Value
Mean Isotropic B 10.73
Anisotropic B[1][1] 0.39
Anisotropic B[1][2] 0.2
Anisotropic B[1][3] 0.0
Anisotropic B[2][2] 0.39
Anisotropic B[2][3] 0.0
Anisotropic B[3][3] -0.59
RMS Deviations
Key Refinement Restraint Deviation
r_scangle_it 4.119
r_scbond_it 2.775
r_mcangle_it 2.233
r_mcbond_it 1.485
r_nbd_refined 0.229
r_gen_planes_other 0.013
r_gen_planes_refined 0.009
r_chiral_restr 0.115
r_dihedral_angle_1_deg 6.495
r_angle_other_deg 0.889
r_angle_refined_deg 1.61
r_bond_other_d 0.002
r_bond_refined_d 0.015
r_nbd_other 0.252
r_nbtor_other 0.075
r_xyhbond_nbd_refined 0.208
r_symmetry_vdw_refined 0.192
r_symmetry_vdw_other 0.334
r_symmetry_hbond_refined 0.152
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1731
Nucleic Acid Atoms 0
Heterogen Atoms 15
Solvent Atoms 271

Software

Computing
Computing Package Purpose
MOSFLM Data Reduction (intensity integration)
CCP4 (SCALA) Data Reduction (data scaling)
SOLVE Structure Solution
REFMAC 5.1.19 Structure Refinement
Software
Software Name Purpose
REFMAC version: 5.1.19 refinement
SOLVE model building