As a component of the minor spliceosome, involved in the splicing of U12-type introns in pre-mRNAs (PubMed:36084634). Plays a role in the regulation of primary cilia length and Hedgehog signaling (PubMed:36084634). . This is the function of Ensembl gene identifier ENSG00000163156 (SCNM1, sodium channel modifier 1).