A multi-protein complex containing at least the T-cell receptor complex and the LAT (linker for activation of T cells) scaffold protein. Also contains a variety of signaling proteins including co-receptors, kinases, phosphatases and adaptors such as CD8. Connects events on the plasma membrane to distal signaling cascades to ultimately modulate T cell biology.
Catalysis of the reaction: 2 3-acyl-sn-glycero-1-phospho-(1'-sn-glycerol) = 3-acyl-sn-glycero-1-phospho-(3'-acyl-1'-sn-glycerol) + sn-glycero-1-phospho-(1'-sn-glycerol).
Catalysis of the synthesis of the HKK-1 carbohydrate epitope; adds a sulfate group to a precursor, GlcA-beta-(1->3)-Gal-beta-(1->4)-GlcNAc-beta-(1->R), forming sulfo-3GlcA-beta-(1->3)-Gal-beta-(1->4)-GlcNAc-beta-(1->R).