Wheat germ agglutinin (WGA) (WGA)

Wheat germ agglutinin (WGA) is a 36 kDa dimeric lectin protein isolated from the germ of wheat (Triticum aestivum) that specifically recognizes and binds to N-acetyl-D-glucosamine and sialic acid carbohydrate residues [1]. In its native plant environment, WGA serves as a defense mechanism against pathogens and pests by interacting with chitinous structures in fungal cell walls and insect exoskeletons [2]. In biomedical research, WGA is a widely utilized tool for staining cell membranes, mapping neuronal pathways, and facilitating the targeted delivery of drugs across biological barriers, such as the blood-brain barrier and intestinal mucosa, due to its ability to undergo receptor-mediated endocytosis [3]. While not a conventional human therapeutic target, WGA is clinically significant as a dietary component that can influence gut health, exhibit insulin-mimetic properties, and potentially trigger inflammatory responses in sensitive individuals [4]. Furthermore, its high specificity for certain glycans makes it a valuable diagnostic biomarker for identifying changes in cell surface glycosylation associated with various cancers and metabolic disorders [5]. Sources: [1] UniProt Consortium, P02876 (Agglutinin isolectin 1). [2] PubChem Compound Summary, Wheat Germ Agglutinins. [3] PubMed PMID: 15808511 (WGA as a drug delivery tool). [4] PubMed PMID: 8338813 (Antinutritive effects of WGA). [5] PubMed PMID: 22543463 (WGA in cancer diagnostics).

Other names

Triticum vulgaris lectinWheat germ lectinWGA lectinTriticum aestivum agglutinin

Wheat germ agglutinin binds with high affinity to N-acetyl-D-glucosamine and sialic acid residues on cell surface glycoproteins and glycolipids, leading to cell agglutination, internalization via receptor-mediated endocytosis, or interference with receptor signaling [1][2].