| Post Translational Modifications | Lymphocyte activation gene 3 protein: Proteolytically cleaved by ADAM10 and ADAM17 within the connecting peptide region, leading to release of Secreted lymphocyte activation gene 3 protein (sLAG-3). ADAM10 mediates constitutive cleavage, but cleavage increases following T-cell activation, whereas shedding by ADAM17 is induced by TCR signaling in a PRKCQ-dependent manner. |
| Function | Lymphocyte activation gene 3 protein: Inhibitory receptor on antigen activated T-cells. Delivers inhibitory signals upon binding to ligands, such as FGL1. FGL1 constitutes a major ligand of LAG3 and is responsible for LAG3 T-cell inhibitory function. Following TCR engagement, LAG3 associates with CD3-TCR in the immunological synapse and directly inhibits T-cell activation. May inhibit antigen-specific T-cell activation in synergy with PDCD1/PD-1, possibly by acting as a coreceptor for PDCD1/PD-1. Negatively regulates the proliferation, activation, effector function and homeostasis of both CD8(+) and CD4(+) T-cells. Also mediates immune tolerance: constitutively expressed on a subset of regulatory T-cells (Tregs) and contributes to their suppressive function. Also acts as a negative regulator of plasmacytoid dendritic cell (pDCs) activation. Binds MHC class II (MHC-II).the precise role of MHC-II-binding is however unclear. Secreted lymphocyte activation gene 3 protein: May function as a ligand for MHC class II (MHC-II) on antigen-presenting cells (APC), promoting APC activation/maturation and driving Th1 immune response. |
| Protein Name | Lymphocyte Activation Gene 3 ProteinLag-3Cd Antigen Cd223 Cleaved Into - Secreted Lymphocyte Activation Gene 3 ProteinSlag-3 |
| Database Links | Reactome: R-HSA-2132295 |
| Cellular Localisation | Lymphocyte Activation Gene 3 Protein: Cell MembraneSingle-Pass Type I Membrane ProteinSecreted Lymphocyte Activation Gene 3 Protein: SecretedProduced Following Cleavage Of The Main Chain |
| Alternative Protein Names | Lymphocyte Activation Gene 3 Protein proteinLag-3 proteinCd Antigen Cd223 Cleaved Into - Secreted Lymphocyte Activation Gene 3 Protein proteinSlag-3 proteinLAG3 proteinFDC protein |
Information sourced from Uniprot.org
