X-RAY DIFFRACTION Experimental Data & Validation


X-ray Experimental Help

Crystallization

Crystalization Experiments
Method Vapor Diffusion Hanging Drop
pH 8.4
Temperature 298.0
Details deoxy-HbTb crystals have been grown using 8-9.5 mg/ml protein mixed with equal amount of 7-12 % w/v PEG 6000, PBS 100 mM, KCl 0.3 M, pH 8.4. Deoxy HbTb crystals were then soaked for several hours in a deoxygenated, CO saturated, stabilizing solution containing 30% w/v PEG 6000, 100 mM Trsi-HCl pH 8.4, 200 mM KCl, 5 mM dithionite reducing agent and flushed with gaseous CO before data collection, VAPOR DIFFUSION, HANGING DROP, temperature 298.0K

Crystal Data

Unit Cell
Length (Å) Angle (°)
a = 61.54 α = 90
b = 104.8 β = 90.36
c = 61.62 γ = 90
Symmetry
Space Group P 1 21 1

Diffraction

Diffraction Experiment
ID # Data Collection Temperature
1 100
Diffraction Detector
Detector Diffraction Type Details Collection Date
CCD RIGAKU SATURN 944 mirrors 2010-11-27
Diffraction Radiation
Monochromator Protocol
GRAPHITE SINGLE WAVELENGTH
Diffraction Detector Source
Source Type Wavelength List Synchrotron Site Beamline
ROTATING ANODE RIGAKU MICROMAX-007 HF 1.5418 -- --

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
2.2 72.17 -- -- -- -- -- 34835 34835 -- -- --

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
FOURIER SYNTHESIS 2.2 72.165 -- 2.0 34835 33316 1519 -- -- 0.22 0.219 -- RANDOM
Number of Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms Numbers
Protein Atoms 4484
Nucleic Acid Atoms 0
Heterogen Atoms 174
Solvent Atoms 37

Software

Software
Software Name Purpose
HKL-2000 data collection
SHELXL-97 model building
SHELXL-97 refinement
HKL-2000 data reduction
HKL-2000 data scaling
SHELXL-97 phasing