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Falcon synthesizes 2023-2024 ortholog literature to model COQ8A/ADCK3 as a mitochondrial UbiB/ADCK
atypical kinase-like protein whose best-supported molecular function is ATP-driven support of de novo
coenzyme Q biosynthesis rather than classical protein-substrate phosphorylation.
"COQ8A is best understood as an **ATP-driven auxiliary factor** that promotes CoQ biosynthesis, likely by facilitating the handling/availability of lipid intermediates and stabilizing or activating the metabolon at the IMM"
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COQ8-family proteins are not well-supported as canonical protein kinases with defined substrates and are
increasingly modeled as ATPase/ATP-dependent regulators; the EC 2.7.-.- label should be read as kinase-like.
"COQ8-family proteins are **not well-supported as canonical protein kinases with defined protein substrates**"
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ATPase activity is required for CoQ production and a 2024 in vitro COQ metabolon reconstruction shows COQ8
increases and streamlines coenzyme Q production within the biosynthetic assembly.
"ATPase activity required for CoQ production"
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Conserved ortholog data place COQ8A in the mitochondrion, associated with the inner mitochondrial
membrane/cristae and the CoQ-biosynthetic environment, and link it to the COQ metabolon (COQ3, COQ5, COQ7, COQ9).
"Conserved ortholog data place COQ8A in the **mitochondrion**, associated with the **inner mitochondrial membrane / cristae** and CoQ-biosynthetic environment"
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No direct zebrafish coq8a perturbation or localization studies were identified; functional annotation relies on
orthology-based inference plus zebrafish CoQ-pathway context studies.
"direct experimental studies** (e.g., zebrafish coq8a knockout, morpholino knockdown, rescue, or localization assays) were not identified"