has material basis in autosomal dominant intellectual developmental disorder autosomal dominant intellectual developmental disorder 55 DOID:0080227 An autosomal dominant intellectual developmental disorder that is characterized by onset of myoclonic seizures in the first years of life, global developmental delay, intellectual disability, speech delay and ataxic gait that has_material_basis_in heterozygous mutation in the NUS1 gene on chromosome 6q22. MIM:617831 autosomal dominant intellectual developmental disorder-55 with seizures autosomal dominant mental retardation 55 disease_ontology autosomal dominant inheritance