Receptor for TNFSF12/APO3L/TWEAK. Interacts directly with the adapter TRADD. Mediates activation of NF-kappa-B and induces apoptosis. May play a role in regulating lymphocyte homeostasis. {ECO:0000269|PubMed:8875942, ECO:0000269|PubMed:8994832, ECO:0000269|PubMed:9052839}. This is the function of Ensembl gene identifier ENSG00000215788 (TNFRSF25, TNF receptor superfamily member 25).