Notably, IFT20 clusters with TCRs at the immune synapse and associates with the ζ- and ɛ-chains of CD3 in response to TCR engagement. TCR–CD3 complex assembly is initiated in the endoplasmic ...

In addition, the association of CD3 with the TCR–peptide–MHC complex transmits the activation signal to intracellular signalling molecules to initiate a signalling cascade in the T cell.

Steatohepatitis is characterized by a T cell infiltrate. (A) CD3 immunostaining shows large numbers of T cells in an expanded portal tract associated with a fibrous septum in alcoholic cirrhosis.