May play a role in apoptosis (PubMed:19969290, PubMed:28688764). Induces activation of MAPK14/p38 and MAPK8/JNK MAPK cascades, when overexpressed (PubMed:16530727). Involved in dental enamel formation (PubMed:30506946). {ECO:0000269|PubMed:16530727, ECO:0000269|PubMed:19969290, ECO:0000269|PubMed:28688764, ECO:0000269|PubMed:30506946}. This is the function of RELT (RELT TNF receptor, ENSG00000054967).