The m.13730G>A (p.G465E) variant in MT-ND5 has been reported in one individual from one family to date (PMID: 8213825), in a male with Leber Hereditary Optic Neuropathy (LHON). The variant was present at 80% heteroplasmy in blood. The variant was presumed to have occurred de novo as it was absent in blood from his mother, maternal grandmother, and two maternal uncles (PMID: 8213825), however no additional tissues were tested and technology performed at the time of publication would not detect low heteroplasmy levels of the variant. The computational predictor APOGEE gives a consensus rating of pathogenic with a score of 0.83, which predicts a damaging effect on gene function (PP3). This variant is absent in the GenBank dataset, Helix dataset, and gnomAD v3.1.2 (PM2_supporting). There are no cybrids, single fiber studies, or other functional assays reported on this variant. In summary, this variant meets criteria to be classified as uncertain significance for primary mitochondrial disease inherited in a mitochondrial manner. This classification was approved by the NICHD/NINDS U24 ClinGen Mitochondrial Disease Variant Curation Expert Panel on November 13, 2023. Mitochondrial DNA-specific ACMG/AMP criteria applied (PMID: 32906214): PM2_supporting, PP3.