RNU2-2
RNU2-2 is a snRNA gene that encodes one of the functional homologs of U2 spliceosomal RNA. RNU2-2 was previously thought to be a pseudogene, but it has been shown to be functional. Specific heterozygous variants in RNU2-2 cause an autosomal dominant developmental and epileptic encephalopathy, also called RNU2-2 syndrome.