A review of fish lectins

Area of Science:

• Zoology
• Biochemistry
• Immunology

Background:

• Lectins are carbohydrate-binding proteins found across diverse biological systems.
• Fish lectins have been identified in numerous species and tissues, indicating their widespread presence and potential importance.
• These lectins exhibit significant variability in their biochemical characteristics and functional activities.

Purpose of the Study:

• To comprehensively review the reported occurrences of lectins in various fish species.
• To summarize the diverse tissues from which fish lectins have been isolated.
• To highlight the varied molecular properties and biological activities of fish lectins.

Main Methods:

• Literature review of scientific publications reporting fish lectins.
• Compilation of data on fish species, tissue sources, and lectin characteristics.
• Analysis of reported lectin activities, including antimicrobial, antitumor, and immunoregulatory functions.

Main Results:

• Lectins have been identified in a wide array of fish species, including eel, carp, catfish, trout, salmon, and zebrafish.
• These lectins originate from diverse tissues such as gills, eggs, electric organs, digestive tracts, liver, skin, mucus, serum, and plasma.
• Fish lectins display heterogeneity in molecular weight, subunit composition, glycosylation, sugar specificity, and amino acid sequences, with documented antimicrobial, antitumor, immunomodulatory, and developmental roles.

Conclusions:

• Fish lectins are widely distributed and exhibit diverse molecular and functional characteristics.
• The identified activities suggest significant roles for fish lectins in innate immunity, host defense, and physiological processes.
• Further research into fish lectins could yield novel applications in medicine and biotechnology.