LGALS9 cDNA Clone – Lectin, Galactoside-Binding, Soluble, 9 (Human)

The galectins are a family of beta-galactoside-binding proteins implicated in modulating cell-cell and cell-matrix interactions. The protein encoded by this gene is an S-type lectin. It is overexpressed in Hodgkin's disease tissue and might participate in the interaction between the H&RS cells with their surrounding cells and might thus play a role in the pathogenesis of this disease and/or its associated immunodeficiency. Multiple alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jul 2008]

galectin-9: Binds galactosides. Has high affinity for the Forssman pentasaccharide. May play a role in thymocyte-epithelial interactions relevant to the biology of the thymus. Inhibits cell proliferation. It is a ligand for HAVCR2/TIM3. Induces T-helper type 1 lymphocyte (Th1) death. Isoform Short acts as an eosinophil chemoattractant. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Unknown function

Chromosomal Location of Human Ortholog: 17q11.2

Cellular Component: cytoplasm; extracellular space; intracellular; nucleus

Molecular Function: carbohydrate binding; disaccharide binding; enzyme binding; galactose binding; signal transducer activity

Biological Process: activation of NF-kappaB transcription factor; female pregnancy; inflammatory response; maternal process involved in pregnancy; natural killer cell tolerance induction; negative regulation of activated T cell proliferation; negative regulation of chemokine production; negative regulation of interferon-gamma production; negative regulation of mast cell degranulation; negative regulation of natural killer cell mediated cytotoxicity; negative regulation of tumor necrosis factor production; positive regulation of CD4-positive, CD25-positive, alpha-beta regulatory T cell differentiation during immune response; positive regulation of I-kappaB kinase/NF-kappaB cascade; positive regulation of interleukin-1 beta secretion; positive regulation of interleukin-4 production; positive regulation of NF-kappaB import into nucleus; positive regulation of virion penetration into host cell; regulation of interleukin-4 production; regulation of interleukin-5 production; response to lipopolysaccharide; toll-like receptor 2 signaling pathway; toll-like receptor 4 signaling pathway