FGL1

Immune suppressive molecule that inhibits antigen-specific T-cell activation by acting as a ligand of LAG3. LAG3-binding initiates a signaling that inhibits the T-cell receptor (TCR) in the immunological synapse, preventing T-cell activation. Binds LAG3 independently from MHC class II (MHC-II). Secreted by, and promotes growth of, hepatocytes..

Function from UniProtKB (Q08830), read 2026-09-23. CC BY 4.0.