title: 3.1-kb deletion of mitochondrial DNA in a patient with Kearns-Sayre syndrome.
abstract: Mitochondrial DNA (mtDNA) deletions have been found in the majority of patients with chronic progressive external ophthalmoplegia and Kearns-Sayre syndrome. A large number of different mtDNA deletions have been identified. They generally spare the two origins of replication and are frequently flanked by direct or indirect repeats. We have found a 3.1-kb deletion of mtDNA in a patient with Kearns-Sayre syndrome that has some unusual features. First, it encompasses nucleotides 11259 to 14368, a localization that was not described before. Second, the deletion is not flanked by direct or indirect repeats, supporting the view that homologous recombination and slip-replication do not account for all mtDNA deletions.
mesh_terms: D001483:Base Sequence; D015139:Blotting, Southern; D004272:DNA, Mitochondrial / Q000235:genetics*; D006801:Humans; D007625:Kearns-Sayre Syndrome / Q000235:genetics* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D008969:Molecular Sequence Data; D009132:Muscles / Q000473:pathology; D017384:Sequence Deletion
chemical_list: D004272:DNA, Mitochondrial