Involved in pre-mRNA splicing through regulating spliceosome C complex formation (PubMed:24304693). May play a role during late-stage splicing events and turnover of excised introns (PubMed:24304693). Found in the Intron Large (IL) complex, a post-mRNA release spliceosomal complex containing the excised intron, U2, U5 and U6 snRNPs, and splicing factors (PubMed:24304693). Interacts with TFIP11 and DHX15 (PubMed:24304693). Widely expressed in tissues and cell lines. Belongs to the GCF family. Was originally thought to be a DNA-binding transcriptional repressor. However, later work showed that the original sequence was a chimera and that the DNA-binding activity was derived from the incorrect N-terminal sequence. Contaminating sequence. The N-terminus matches the 2q37.3 region.