COA8
Chr 14ARcytochrome c oxidase assembly factor 8
Also known as: APOP, APOP1, APOPT1, C14orf153, MC4DN17
COA8 encodes a mitochondrial protein required for cytochrome c oxidase (complex IV) assembly and function, protecting the assembly process from oxidation-induced degradation. Biallelic mutations cause autosomal recessive mitochondrial complex IV deficiency, which typically presents as a multi-system disorder affecting energy metabolism. The gene shows minimal constraint against loss-of-function variants (pLI 0.0002, LOEUF 1.25), consistent with its recessive inheritance pattern.
Definitive — sufficient evidence for diagnostic panels
Population Genetics & Constraint
gnomAD v4 — loss-of-function & missense intolerance
Highly tolerant — LoF variants common in population
Tolerant to missense variation
Predictions shown for reference only — model trained on dominant genes, not applicable to AR conditions.
The Badonyi & Marsh prediction model was trained exclusively on dominant disease genes. Predictions are not reliable for genes with autosomal recessive inheritance and are shown at reduced opacity for reference only.
Predictions from Badonyi M, Marsh JA. PLoS ONE. 2024;19(8):e0307312.
ClinVar Variant Classifications
0 submitted variants in ClinVar
Protein Context — Lollipop Plot
COA8 · protein map & ClinVar variants
Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.
3D Protein StructureAlphaFold
External Resources
Links to major genomics databases and tools
Clinical Trials
Active and recruiting trials from ClinicalTrials.gov
No active trials found for this gene.
Search ClinicalTrials.gov →External Resources
Links to major genomics databases and tools