NCIt definition : Human ATN1 wild-type allele is located in the vicinity of 12p13.31 and is approximately
18 kb in length. This allele, which encodes atrophin-1 protein, is involved in transcriptional
repression. Mutation of the gene is associated with congenital hypotonia, epilepsy,
developmental delay, and digital anomalies (CHEDDA) and the expansion from 7-35 copies
to 49-93 copies of a trinucleotide repeat (CAG/CAA) within this gene is associated
with dentatorubral pallidoluysian atrophy (DRPLA).;