TMED7 is a transmembrane p24 trafficking protein that plays crucial roles in vesicular protein transport within the early secretory pathway and immune regulation. The protein functions as a COPII adaptor that facilitates trafficking of cargo proteins, particularly TLR4, from the endoplasmic reticulum to the cell surface through the Golgi apparatus 1. TMED7 forms stable complexes with TLR4 through its GOLD domain, enabling proper receptor delivery to the plasma membrane for immune signaling 1. However, TMED7 also serves as a negative regulator of TLR4-mediated inflammatory responses by inhibiting MyD88-independent signaling pathways in endosomes 2. The protein colocalizes with TRAM and TLR4 in late endosomes, where it facilitates TAG-mediated disruption of TRAM/TRIF complexes and promotes TLR4 degradation 2. Additionally, RHBDL4 protease targets TMED7 for degradation as part of a negative feedback mechanism to prevent TLR4 over-activation 3. Beyond immune function, TMED7 is abundant in specialized cellular structures like the Hermes body of sperm, where it may transport glucose transporters for ATP production 4. TMED7 expression has also been associated with follicular lymphoma transformation and head and neck squamous carcinoma prognosis 56.