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Published on: January 8, 2014
Characterisation of oxidized recombinant human galectin-1
Stacy A Scott1, Andrea Bugarcic, Helen Blanchard
1Institute for Glycomics, Gold Coast Campus, Griffith University, Queensland 4222, Australia.
Oxidized human galectin-1, implicated in immune responses and tumor development, was produced in milligram quantities. Biophysical studies revealed distinct oxidized forms with altered shapes and lost lectin activity, yielding a stable species for structural analysis.
Area of Science:
- Biochemistry
- Molecular Biology
- Structural Biology
Background:
- Oxidized human galectin-1 is involved in immune responses to injured axons.
- Over-expression of galectin-1 in cancer, coupled with oxidative stress, suggests a role in tumorigenesis.
Purpose of the Study:
- To generate milligram quantities of oxidized human galectin-1 for biophysical characterization.
- To identify and characterize different oxidized forms of human galectin-1.
- To produce a stable, mono-disperse oxidized human galectin-1 species suitable for structural studies.
Main Methods:
- Production of milligram quantities of oxidized human galectin-1.
- Biophysical characterization techniques to analyze protein states.
- Confirmation of disulfide bonds, shape changes, and lectin activity loss.
Main Results:
- Two separable oxidized forms of human galectin-1 were identified.
- These forms exist as largely mono-disperse solutions at high concentrations.
- Disulfide bonds were confirmed, alongside altered protein shape and loss of lectin activity.
Conclusions:
- The study successfully produced milligram quantities of oxidized human galectin-1.
- Characterization revealed distinct oxidized states with altered biophysical properties.
- A specific mono-disperse oxidized human galectin-1 species was obtained, optimal for structural investigations like X-ray crystallography.
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