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Mitochondrial disease v0.891 MIEF1 Lucy Spencer gene: MIEF1 was added
gene: MIEF1 was added to Mitochondrial disease. Sources: Literature
Mode of inheritance for gene: MIEF1 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: MIEF1 were set to 33632269
Phenotypes for gene: MIEF1 were set to Optic atrophy 14 (MIM#620550)
Review for gene: MIEF1 was set to AMBER
Added comment: PMID: 33632269
Inherited optic neuropathies cohort from france with nothing found in OPA1, OPA3 and WFS1 or mtDNA. 2 individuals (55 and 47yo) found to have missense variants in MIEF1, p.Arg146Trp has 35 hets 0 homs in gnomad, p.Tyr240Asn is absent. Both have non-syndromic late onset inherited optic neuropathies characterized by initial loss of peripheral visual fields.

Functional studies in HeLa cells- both missense localised to the mitochondria and formed oligomers similar to WT. MIEF1 normally regulates mitochondrial fission dynamics and causes an increase in mitochondrial fusion events, however both missense variants caused a significantly decreased mitochondrial fusion events.
Sources: Literature
Mitochondrial disease v0.0 OPA1 Zornitza Stark gene: OPA1 was added
gene: OPA1 was added to Mitochondrial_AGHA_VCGS. Sources: Expert Review Green,Australian Genomics Health Alliance Mitochondrial Flagship,Victorian Clinical Genetics Services
Mode of inheritance for gene: OPA1 was set to Unknown