coq8a encodes the atypical kinase COQ8A/ADCK3, an inner mitochondrial membrane UbiB/ADCK kinase-like protein required for de novo coenzyme Q (ubiquinone) biosynthesis. It has ATPase activity that supports assembly and function of the CoQ biosynthetic machinery at the inner mitochondrial membrane; its physiological substrate specificity is unclear, and it is not a classical protein-substrate kinase. Zebrafish coq8a function is inferred from conserved COQ8A/ADCK3 ortholog biology and CoQ-pathway context.
| GO Term | Evidence | Action | Reason |
|---|---|---|---|
| GO:0031966 mitochondrial membrane | IEA GO_REF:0000044 | ACCEPT | Summary: mitochondrial membrane (GO:0031966) is supported for Coq8a. Reason: UniProt places Coq8a at the mitochondrion membrane. Supporting Evidence: file:DANRE/coq8a/coq8a-uniprot.txt SUBCELLULAR LOCATION: Mitochondrion membrane file:DANRE/coq8a/coq8a-deep-research-falcon.md COQ8A is consistently described as a **mitochondrial** protein that associates with the IMM/cristae environment where CoQ biosynthesis occurs file:DANRE/coq8a/coq8a-deep-research-falcon.md Conserved ortholog data place COQ8A in the **mitochondrion**, associated with the **inner mitochondrial membrane / cristae** and CoQ-biosynthetic environment |
| GO:0006744 ubiquinone biosynthetic process | IEA GO_REF:0000041 | ACCEPT | Summary: ubiquinone biosynthetic process (GO:0006744) is supported for Coq8a. Reason: COQ8A is an atypical kinase involved in coenzyme Q/ubiquinone biosynthesis. Supporting Evidence: file:DANRE/coq8a/coq8a-uniprot.txt Atypical kinase involved in the biosynthesis of coenzyme Q file:DANRE/coq8a/coq8a-uniprot.txt PATHWAY: Cofactor biosynthesis; ubiquinone biosynthesis. file:DANRE/coq8a/coq8a-deep-research-falcon.md COQ8A functions in the **coenzyme Q (ubiquinone/CoQ) biosynthetic pathway** in mitochondria, helping maintain efficient de novo CoQ synthesis file:DANRE/coq8a/coq8a-deep-research-falcon.md COQ8 increases and streamlines coenzyme Q production |
| GO:0031966 mitochondrial membrane | ISS GO_REF:0000024 | ACCEPT | Summary: mitochondrial membrane (GO:0031966) is supported for Coq8a. Reason: UniProt places Coq8a at the mitochondrion membrane. Supporting Evidence: file:DANRE/coq8a/coq8a-uniprot.txt SUBCELLULAR LOCATION: Mitochondrion membrane file:DANRE/coq8a/coq8a-deep-research-falcon.md Conserved ortholog data place COQ8A in the **mitochondrion**, associated with the **inner mitochondrial membrane / cristae** and CoQ-biosynthetic environment |
| GO:0004672 protein kinase activity | ISS GO_REF:0000024 | KEEP AS NON CORE | Summary: protein kinase activity (GO:0004672) is plausible but over-specific/conflicting for Coq8a, so it is retained as non-core. Reason: COQ8A is an atypical kinase, but the physiological substrate is unresolved and the GOA also contains NOT protein kinase evidence. The accepted core molecular function is the broader kinase activity already present in GOA. Falcon deep research reinforces this: COQ8-family proteins are not well-supported as canonical protein kinases with defined protein substrates, and no definitive protein-kinase substrate reaction is established, so protein kinase activity is retained only as non-core. Supporting Evidence: file:DANRE/coq8a/coq8a-uniprot.txt substrate specificity is still unclear file:DANRE/coq8a/coq8a-uniprot.txt acts as a small molecule kinase, possibly a lipid kinase file:DANRE/coq8a/coq8a-deep-research-falcon.md COQ8-family proteins are **not well-supported as canonical protein kinases with defined protein substrates** file:DANRE/coq8a/coq8a-deep-research-falcon.md No definitive canonical protein-kinase substrate reaction is established |
| GO:0004672 protein kinase activity | ISS NOT GO_REF:0000024 | KEEP AS NON CORE | Summary: NOT protein kinase activity (GO:0004672) is retained as non-core negative evidence in the conflicting COQ8A kinase record. Reason: The NOT annotation should not be converted into a positive replacement term. It is retained as contextual evidence that COQ8A kinase substrate specificity is unresolved, while the core function uses generic kinase activity. Falcon deep research is consistent with this negation: COQ8-family proteins are increasingly modeled as ATPase/ATP-dependent regulators of CoQ biosynthesis rather than classical protein-substrate kinases. Supporting Evidence: file:DANRE/coq8a/coq8a-uniprot.txt substrate specificity is still unclear file:DANRE/coq8a/coq8a-uniprot.txt acts as a small molecule kinase, possibly a lipid kinase file:DANRE/coq8a/coq8a-deep-research-falcon.md increasingly modeled as **ATPase/ATP-dependent regulators** of CoQ biosynthesis |
| GO:0006468 protein phosphorylation | ISS NOT GO_REF:0000024 | KEEP AS NON CORE | Summary: NOT protein phosphorylation (GO:0006468) is retained because COQ8A is not established as acting through protein phosphorylation. Reason: The negated process annotation is coherent with the unresolved kinase substrate; the direct supported process is ubiquinone biosynthesis. Falcon deep research supports the negation: no definitive canonical protein-kinase substrate reaction is established, so COQ8A is not annotated as acting through protein phosphorylation. Supporting Evidence: file:DANRE/coq8a/coq8a-uniprot.txt substrate specificity is still unclear file:DANRE/coq8a/coq8a-uniprot.txt PATHWAY: Cofactor biosynthesis; ubiquinone biosynthesis. file:DANRE/coq8a/coq8a-deep-research-falcon.md No definitive canonical protein-kinase substrate reaction is established |
| GO:0005739 mitochondrion | ISS GO_REF:0000024 | ACCEPT | Summary: mitochondrion (GO:0005739) is supported for Coq8a. Reason: The more specific mitochondrial membrane location supports this broader cellular component. Supporting Evidence: file:DANRE/coq8a/coq8a-uniprot.txt SUBCELLULAR LOCATION: Mitochondrion membrane file:DANRE/coq8a/coq8a-deep-research-falcon.md COQ8A is consistently described as a **mitochondrial** protein that associates with the IMM/cristae environment where CoQ biosynthesis occurs |
| GO:0006744 ubiquinone biosynthetic process | ISS GO_REF:0000024 | ACCEPT | Summary: ubiquinone biosynthetic process (GO:0006744) is supported for Coq8a. Reason: COQ8A is an atypical kinase involved in coenzyme Q/ubiquinone biosynthesis. Supporting Evidence: file:DANRE/coq8a/coq8a-uniprot.txt Atypical kinase involved in the biosynthesis of coenzyme Q file:DANRE/coq8a/coq8a-uniprot.txt PATHWAY: Cofactor biosynthesis; ubiquinone biosynthesis. file:DANRE/coq8a/coq8a-deep-research-falcon.md COQ8A functions in the **coenzyme Q (ubiquinone/CoQ) biosynthetic pathway** in mitochondria, helping maintain efficient de novo CoQ synthesis file:DANRE/coq8a/coq8a-deep-research-falcon.md Loss of COQ8A impairs CoQ production and downstream oxidative phosphorylation |
| GO:0016301 kinase activity | ISS GO_REF:0000024 | ACCEPT | Summary: kinase activity (GO:0016301) is supported cautiously for Coq8a. Reason: COQ8A is an atypical kinase, but substrate specificity remains unclear, so the broad kinase term is preferable to protein kinase activity. Falcon deep research underscores that COQ8A has a kinase-like (UbiB/ADCK) fold rather than a conventional protein kinase mechanism, and that its EC 2.7.-.- designation should be read as kinase-like. Supporting Evidence: file:DANRE/coq8a/coq8a-uniprot.txt substrate specificity is still unclear file:DANRE/coq8a/coq8a-uniprot.txt acts as a small molecule kinase, possibly a lipid kinase file:DANRE/coq8a/coq8a-deep-research-falcon.md COQ8A belongs to the **UbiB/ADCK atypical protein kinase-like family**, a protein kinase superfamily branch with an atypical kinase-like fold rather than a conventional protein kinase mechanism file:DANRE/coq8a/coq8a-deep-research-falcon.md EC 2.7.-.- should be interpreted cautiously as kinase-like, not a well-defined phosphotransferase reaction |
| GO:0016310 phosphorylation | ISS GO_REF:0000024 | MARK AS OVER ANNOTATED | Summary: phosphorylation (GO:0016310) is too generic and not the best process annotation for Coq8a. Reason: The functionally supported process is ubiquinone biosynthesis, while kinase substrate specificity remains unresolved. Falcon deep research strengthens this: no defined phosphotransfer reaction is established for COQ8A and the protein is best modeled as an ATP-driven regulator of CoQ biosynthesis rather than a generic phosphorylating enzyme. Supporting Evidence: file:DANRE/coq8a/coq8a-uniprot.txt Atypical kinase involved in the biosynthesis of coenzyme Q file:DANRE/coq8a/coq8a-uniprot.txt PATHWAY: Cofactor biosynthesis; ubiquinone biosynthesis. file:DANRE/coq8a/coq8a-deep-research-falcon.md No definitive canonical protein-kinase substrate reaction is established file:DANRE/coq8a/coq8a-deep-research-falcon.md COQ8A is best understood as an **ATP-driven auxiliary factor** that promotes CoQ biosynthesis |
| GO:0043531 ADP binding | ISS GO_REF:0000024 | KEEP AS NON CORE | Summary: ADP binding (GO:0043531) is supported but is not the core function. Reason: ADP binding is a ligand-binding property of the atypical kinase; the core role is mitochondrial ubiquinone biosynthesis. Falcon deep research frames COQ8A as an ATP-dependent regulator whose ATPase/nucleotide-binding activity supports CoQ production, consistent with retaining ADP binding as a non-core ligand-binding property. Supporting Evidence: file:DANRE/coq8a/coq8a-uniprot.txt selectivity for binding ADP over ATP file:DANRE/coq8a/coq8a-deep-research-falcon.md ATPase activity required for CoQ production |
Loading supporting content…
Download this section (compressed HTML)Loading supporting content…
Download this section (compressed HTML)Loading supporting content…
Download this section (compressed HTML)