Overview
Galectin-1 is a member of the galectin family, which binds beta-galactoside sugars and modulates cellular processes. It is widely expressed in immune cells, endothelial tissues, and tumors. As a homodimeric protein, it plays dual roles in promoting or suppressing immune responses depending on context. In biomedical research, Galectin-1 is studied for its involvement in T-cell apoptosis, tumor immune evasion, and neural regeneration. Its reversible carbohydrate-binding activity makes it valuable for glycobiology applications, including lectin arrays and cell-surface interaction studies.
Physical and Chemical Properties
The protein consists of 135 amino acids with a conserved carbohydrate-recognition domain (CRD). It forms non-covalent dimers under physiological conditions, enhancing its ligand-binding avidity. The isoelectric point ranges from 4.5 to 5.5, and it exhibits optimal lectin activity at neutral pH. Galectin-1 lacks glycosylation sites but contains free cysteine residues critical for redox-sensitive function. Its stability depends on storage conditions—lyophilized form remains stable for years at -20°C, while solutions should be used immediately or stored short-term with reducing agents to prevent oxidation.
Main Applications
In immunotherapy development, Galectin-1 inhibitors are explored for cancer treatment due to their role in tumor microenvironment immunosuppression. It’s also used to induce tolerance in autoimmune disease models. The protein serves as a tool in neuroscience to study axon guidance and neural repair mechanisms. Industrially, recombinant Galectin-1 is utilized in diagnostic kits for detecting aberrant glycosylation patterns in cancers or infectious diseases.
Safety and Storage
While Galectin-1 is not classified as hazardous, standard laboratory precautions apply. Use gloves and avoid aerosolization during reconstitution. Spills should be cleaned with PBS followed by ethanol. Long-term storage requires lyophilization in aliquots at -20°C or below. Avoid repeated freeze-thaw cycles. For functional assays, freshly prepare working solutions with DTT (1-5 mM) to maintain reduced state. Verify activity via hemagglutination or glycan-binding assays after prolonged storage.
B2B Procurement Guide
Research-grade Galectin-1 is typically sold by biotech suppliers in 100 μg to 10 mg quantities. Key procurement criteria include: recombinant source (E. coli or mammalian expression), endotoxin testing, and batch-specific activity reports. For bulk orders (≥50 mg), request custom purity specifications and stability data. Compare lead times—mammalian-expressed variants may require longer production. Consider suppliers offering GMP-grade options for preclinical development. Negotiate volume discounts and confirm cold-chain shipping protocols.
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