TRAIP: Proteins and Enzymes

The TNF receptor-associated factor (TRAF) family is a group of cytoplasmic adapter proteins that link a wide variety of cell surface receptors including the TNF and IL-1 receptor (TRNFR and IL-1R) superfamily to diverse signaling cascades involved in differentiation, proliferation, activation and apoptosis. TRIP (TRAF-interacting protein) was identified in 1997 as a component of receptor-TRAF signaling complexes (Lee, 1997). TRIP (also known as TRAIP) has been shown to associate with TRNFR2 or CD30 signaling complexes through its interaction with TRAF proteins and inhibit TRAF2-mediated NF-kB activation (Lee, 1997; Regamey et al, 2003). The recruitment of different TRAFs and TRAF associated proteins like TRIP to receptor complexes can help regulate and provide specificity to the intracellular signals triggered by the cell surface receptors.