Linker of Activated T cells

Linker of Activated T cells (LAT) is a transmembrane adapter protein associated with glycosphingolipid-enriched microdomains (GEMs).

LAT was described in the early 1990s as a phosphoprotein of 36–38 kDa (pp. 36–38) rapidly phosphorylated on tyrosine residues following TCR ligation. Cloning of the gene revealed that the protein product is a type III (leaderless) transmembrane protein of 262 aminoacids (long form) or 233 aminoacids (short form) in humans, 242 aminoacids in mouse, and 241 aminoacids in rat.