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A lectin from Sesbania aculeata (Dhaincha) roots and its possible function
1Institute of Genomics and Integrative Biology, Delhi University Campus, Mall Road, Delhi 110007, India.
Biochemistry. Biokhimiia
|April 15, 2009
Summary
Researchers isolated a glucose-specific lectin from Sesbania aculeata roots. This plant lectin interacts with various rhizobial species, suggesting a role in plant-microbe interactions.
Area of Science:
- Plant molecular biology
- Biochemistry
- Microbiology
Background:
- Leguminous plants like Sesbania aculeata engage in symbiotic relationships with rhizobia.
- Lectins are proteins known to play roles in molecular recognition and cell adhesion.
Purpose of the Study:
- To isolate and characterize a novel lectin from Sesbania aculeata roots.
- To investigate the lectin's biochemical properties and potential biological functions.
Main Methods:
- Affinity chromatography using Sephadex G-50 for lectin purification.
- Subunit molecular weight determination (39 kDa).
- Homology analysis with known lectin proteins.
Main Results:
- A glucose-specific lectin was successfully isolated from Sesbania aculeata roots.
- The lectin exhibited developmental regulation, with peak expression in the second week.
- A 28% homology was found with Arabidopsis thaliana lectin-like protein.
- The purified lectin demonstrated binding to lipopolysaccharides from various rhizobial strains.
Conclusions:
- The Sesbania aculeata root lectin is a glucose-specific protein with a distinct developmental expression pattern.
- This lectin shows potential involvement in plant-microbe interactions, specifically with rhizobia, by binding to their lipopolysaccharides.
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