Plays a role in DNA damage repair as component of the ASCC complex (PubMed:29997253). Part of the ASC-1 complex that enhances NF-kappa-B, SRF and AP1 transactivation (PubMed:12077347). In cells responding to gastrin-activated paracrine signals, it is involved in the induction of SERPINB2 expression by gastrin. May also play a role in the development of neuromuscular junction. Identified in the ASCC complex that contains ASCC1, ASCC2 and ASCC3 (PubMed:29144457, PubMed:29997253). Interacts directly with ASCC3 (PubMed:29997253). The ASCC complex interacts with ALKBH3 (PubMed:29144457, PubMed:22055184). Part of the ASC-1 complex, that contains TRIP4, ASCC1, ASCC2 and ASCC3 (PubMed:12077347). Interacts with CSRP1 (PubMed:26924529). Interacts with ZCCHC4 (PubMed:31799605). Colocalizes with PRPF8 in nuclear speckles in the absence of DNA damage. Ubiquitous. The gene represented in this entry may be involved in disease pathogenesis. The disease is caused by variants affecting the gene represented in this entry.