Transcript Long-Read Sequencing Unveils the Molecular Complexity of a Novel ROGDI Splicing Variant in a Tunisian Family With Kohlschütter-Tönz Syndrome.

Kohlschütter-Tönz Syndrome (KTS) is an ultra-rare autosomal recessive disorder, characterized by a clinical triad: infantile-onset epilepsy, global developmental delay, and amelogenesis imperfecta. KTS is caused by pathogenic variants in ROGDI, encoding a leucine zipper protein of unknown function. Our study characterizes a novel homozygous ROGDI variant (NM_024589.