Expression of isolated C-type carbohydrate recognition domains

Area of Science:

• Biochemistry
• Molecular Biology
• Structural Biology

Background:

• Snake venom lectins, specifically C-type animal lectins, play roles in biological processes.
• The galactose-specific lectin from Trimeresurus stejnegeri venom comprises carbohydrate recognition domains.
• Understanding the tertiary structure of this lectin is crucial for elucidating its function.

Purpose of the Study:

• To produce a recombinant version of the galactose-specific lectin from Trimeresurus stejnegeri.
• To characterize the biochemical and structural properties of the recombinant lectin.
• To compare the recombinant lectin with its native counterpart.

Main Methods:

• Production of the lectin in Escherichia coli.
• In vitro refolding and affinity chromatography for protein purification.
• Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and mass spectrometry for purity and sequence analysis.
• Hemagglutination assays, enzyme-linked lectin binding assays, fluorescence spectroscopy, and circular dichroism for activity and structural analysis.

Main Results:

• Modest yields (8 mg/liter) of active recombinant protein were obtained.
• The recombinant lectin was homogeneous and its amino acid sequence was confirmed.
• The recombinant lectin exhibited comparable sugar-binding activity and structural similarity to the native protein.

Conclusions:

• Successful production of an active, homogeneous recombinant galactose-binding lectin from Trimeresurus stejnegeri.
• The recombinant lectin serves as a suitable model for further structural studies.
• This recombinant protein can be utilized for detailed investigations into C-type animal lectin structure-function relationships.