Total submissions: 4
Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
---|---|---|---|---|---|---|---|---|
Clin |
RCV002260589 | SCV002540730 | likely pathogenic | Mitochondrial disease | 2022-06-30 | reviewed by expert panel | curation | The m.14453G>A (p.A74V) variant in MT-ND6 has been reported in at least 10 individuals with primary mitochondrial disease from 10 families. Affected individuals had onset ranging from the first day of life to adulthood (all but one case had early childhood onset, however); and with features variably consistent with Leigh syndrome and MELAS (PS4_moderate; PMIDs: 34933128, 22947169, 33644659, 32552696, 24642831, 21364701, 11781695). Heteroplasmy levels ranged from 41-83%. There are at least five reports of de novo occurrences of this variant (PM6_strong, score 2.5; PMIDs: 34933128, 33644659, 24642831, 11781695). There is one report of this variant segregating with disease features as a healthy mother of a proband had the variant present at 2% in blood, however this does not meet criteria to apply PP1_supporting (at least two segregations). This variant is absent in the GenBank dataset, Helix dataset, and gnomAD v3.1.2 (PM2_supporting). There are no cybrid studies, single fiber studies, or other functional assays reported for this variant. The computational predictor APOGEE gives a consensus rating of pathogenic with a score of 0.81 (Min=0, Max=1), which predicts a damaging effect on gene function (PP3). In summary, this variant meets criteria to be classified as likely pathogenic for primary mitochondrial disease inherited in a mitochondrial manner. This classification was approved by the NICHD/NINDS U24 Mitochondrial Disease Variant Curation Expert Panel on June 27, 2022. Mitochondrial DNA-specific ACMG/AMP criteria applied (PMID: 32906214): PS4_moderate, PM6_strong, PM2_supporting, PP3. |
Wong Mito Lab, |
RCV000855109 | SCV000998156 | likely pathogenic | Leigh syndrome | 2019-10-17 | criteria provided, single submitter | clinical testing | The NC_012920.1:m.14453G>A (YP_003024037.1:p.Ala74Val) variant in MTND6 gene is interpretated to be a Likely Pathogenic variant based on the modified ACMG guidelines (unpublished). This variant meets the following evidence codes: PM9, PM10, PP4, PP6, PP7 |
OMIM | RCV000010331 | SCV000030557 | pathogenic | MELAS syndrome | 2001-10-01 | no assertion criteria provided | literature only | |
Gene |
RCV000010331 | SCV004042642 | not provided | MELAS syndrome | no assertion provided | literature only |