X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
pH 6
Details PROTEIN SOLUTION: WASHED AND CONCENTRATED 4 TUBES PCDHFR USING A CENTRICON 10 50 MM MES, 100MM KCL, B-NADPH, PH 6.0, A280/340 RATIO OF 24. WASHED WITH 50MM MES, 100MM KCL, PH 6.0, WASHED WITH 50MM MES, 100MM KCL, PH 6.0 TO A CONCENTRATION OF 6.5 MG/ML. RESERVOIR SOLUTION: 50% PEG2000MME, 50MM MES, 100MM, PH 6.0 SET UP MICROBATCH POLYTHERMAL GRADIENT EXPERIMENTS IN MICROPETS. DROPS WERE COMPOSED OF: 2.5 MICROLITERS PROTEIN SOLUTION 2.0 MICROLITERS PROTEIN SOLUTION 0.5 MICROLITERS 50MM MES, 100MM KCL, PH 6.0. MICROPETS WERE LEFT TO EQUILIBRATE ON THE POLYTHERMAL GRADIENT.

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 37.33 α = 90
b = 43.23 β = 94.59
c = 61.24 γ = 90
Symmetry
Space Group P 1 21 1

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 293
Diffraction Detector
Detector Diffraction Type Details Collection Date
-- -- -- 1999-01-15
Diffraction Radiation
Monochromator Protocol
-- SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
ROTATING ANODE RIGAKU RU200HB -- -- --

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
2 100 99.4 0.054 -- -- 2.6 -- 11919 -- 2.0 --

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
MOLECULAR REPLACEMENT 2.0 100.0 -- 0.0 -- 13297 -- -- -- 0.2185 0.2185 0.2968 --
RMS Deviations
Key Refinement Restraint Deviation
c_bond_d 0.008
c_angle_deg 1.5
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 1678
Nucleic Acid Atoms 0
Heterogen Atoms 79
Solvent Atoms 101

Software

Computing
Computing Package Purpose
DENZO Data Reduction (intensity integration)
SCALEPACK Data Reduction (data scaling)
CNS Structure Refinement
Software
Software Name Purpose
CNS refinement