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Published on: July 5, 2018
Fish lily type lectin-1 contains β-prism architecture: immunological characterization
Abirami Arasu1, Venkatesh Kumaresan, Akila Sathyamoorthi
1Division of Fisheries Biotechnology & Molecular Biology, Department of Biotechnology, Faculty of Science and Humanities, SRM University, Kattankulathur 603 203, Chennai, Tamil Nadu, India; Department of Microbiology, SRM Arts & Science College, Kattankulathur 603 203, Chennai, India.
A novel lily type lectin-1 (CsLTL-1) was identified in striped murrel. This immune gene is upregulated during fungal and bacterial infections, playing a role in pathogen recognition.
Area of Science:
- Immunology
- Marine Biology
- Biochemistry
Background:
- Lectins are carbohydrate-binding proteins crucial for innate immunity.
- Channa striatus (striped murrel) is an important aquaculture species facing disease challenges.
Purpose of the Study:
- To identify and characterize a novel lily type lectin-1 (CsLTL-1) from Channa striatus.
- To investigate the immune role of CsLTL-1 in response to pathogens.
Main Methods:
- Genome sequencing (GS-FLX™) and cDNA library construction.
- Quantitative gene expression analysis (mRNA).
- Recombinant protein expression, hemagglutination assays, bioinformatics, and 3D structure prediction.
Main Results:
- CsLTL-1 gene identified, encoding a 118-amino acid protein.
- CsLTL-1 mRNA predominantly expressed in gills and upregulated by fungal (Aphanomyces invadans) and bacterial (Aeromonas hydrophila) infections.
- Recombinant CsLTL-1 exhibits calcium-independent hemagglutination activity, inhibited by d-mannose and d-glucose, with a predicted mannose-binding site and β-prism structure.
Conclusions:
- CsLTL-1 is a functional lily type lectin involved in the innate immune response of Channa striatus.
- CsLTL-1 plays a role in pathogen recognition and elimination, contributing to fish immunity.
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