Supplementary Material for: A Novel Mutation in the <b><i>ROGDI</i></b> Gene in a Patient with Kohlschütter-Tönz Syndrome

Kohlschütter-Tönz Syndrome (KTZS) is an autosomal recessive disorder caused by mutations in the <i>ROGDI</i> gene. This syndrome is characterized by epilepsy, psychomotor regression and amelogenesis imperfecta. In this paper, we report a case of a 13-year-old Malian girl presenting with this rare disease. By genetic analysis, we identified a novel<i> ROGDI</i> homozygous mutation NM_024589.1: c.117+1G>T [Chr16 (GRCh37): g.4852382C>A] which confirmed the diagnosis of Kohlschütter-Tönz syndrome. The mutation abolishes the usual splice donor site of intron 2 which leads to the deletion of exon 2 and in-frame assembly of exon 3. Exon 2 encodes a highly conserved leucine-rich region that is essential for ROGDI protein function. Hence, this deletion may affect the function of the ROGDI protein.