cd00184: TNFSF (This model is not part of the current CDD release)
tumor necrosis factor superfamily (TNFSF)
The tumor necrosis factor superfamily (TNFSF) includes a set of ligands that bind to one or more TNF receptor superfamily (TNFRSF) molecules. These superfamily members initiate numerous physiological functions. They play crucial roles in regulating development and homeostasis of the immune system, nervous system, bone and ectodermal organs in mammals. All members are either membrane-associated or soluble trimeric forms that cluster their cognate receptors to initiate signal transduction. TNFSF proteins that promote survival or inflammatory signaling include TNF-alpha (TNFSF2), lymphotoxins alpha and beta (TNFSF1 and TNFSF3), OX40L (TNFSF4), CD40L (TNFSF5) and B-cell activating factor or BAFF (TNFSF13), while those that induce cell death include FasL (TNFSF6) and TRAIL (TNFSF10). These ligands are essential to many aspects of normal B cell biology from development in the bone marrow to maturation in the periphery, as well as for activation and differentiation into germinal center, memory or plasma cells. Other aspects of B cell biology such as their ability to present antigens or regulate immune responses are also influenced by the TNF ligands; inadequate regulation of many of these ligands is associated with B cell disorders, including autoimmunity and cancers. Inhibitors of TNF ligands are among the most successful protein-based drugs and have been shown to be clinically efficacious at reducing inflammation that is associated with several autoimmune diseases. Many TNF superfamily members have been identified recently in teleost fish, such as TNF-alpha, CD40L (TNFSF5), FasL (TNFSF6), proliferation-inducing ligand or APRIL (TNFSF12), TNF-like weak inducer of apoptosis or TWEAK (TNFSF12), BAFF (TNFSF13), ectodysplasin A or EDA, LIGHT (TNFSF14), and receptor activator of nuclear factor kappa-B ligand or RANKL (TNFSF10), with some members existing as multiple isoforms (e.g., four TRAIL-like genes are present in teleosts). However, no TNF-b gene has been identified in any fish species, despite its important role in mammals.