Sec59 is an endoplasmic-reticulum membrane dolichol kinase that produces dolichyl phosphate by CTP-dependent phosphorylation of dolichol. Dolichyl phosphate supplies the lipid carrier needed for protein N-glycosylation, O-mannosylation and GPI-anchor formation. Conserved Sec59/DOLK orthology supports this function in fission yeast; the related CTP-dependent phosphorylation of diacylglycerol is a distinct enzyme activity.
The full 504-aa target has a curated Sec59/DOLK assignment and multipass ER membrane architecture. Its P20048 ortholog source traces to experiments. PMID:1323123(https://pubmed.ncbi.nlm.nih.gov/1323123/) links the budding-yeast sec59 defect to loss of dolichol kinase and depletion of dolichyl phosphate; adding the lipid carrier restores downstream mannose-carrier synthesis. PMID:12213788(https://pubmed.ncbi.nlm.nih.gov/12213788/) distinguishes CTP-dependent dolichol phosphorylation from DAG kinase activity.
This supports target function by orthology, not a claim that those enzyme assays used pombe Sec59. The target HDA ER observation is retained despite Falcon’s failure to retrieve it. Dolichol-phosphate-mannose biosynthesis is valid downstream process participation through precursor supply; the direct core reaction is dolichol phosphorylation, not mannose transfer.
Exact retained output. These are name/location claims, not emitted GO/EC predictions. CNN denotes overlap with existing supported annotation; it does not establish literal membership in the training set.
| Claim type | Verbatim output | Assessment | Evidence and interpretation |
|---|---|---|---|
| name | dolichol kinase | CNN | The target has the full membrane-kinase architecture and a curated transfer from experimentally characterized P20048/Sec59. Donor biochemistry distinguishes CTP-dependent dolichol phosphorylation from DAG kinase activity (PMID:1323123; PMID:12213788). |
| location | Membrane | LSP | The target is more specifically an ER membrane protein according to the curated localization and membrane topology. The broad membrane statement is correct but adds no compartment resolution (PMID:16823372; Q9Y7T6). |
PMID:12213788(https://pubmed.ncbi.nlm.nih.gov/12213788/):
Dolichol kinase (DK) catalyzes the CTP-mediated phosphorylation of dolichol in
eukaryotic cells, the terminal step in dolichyl monophosphate (Dol-P)
biosynthesis de novo.
The genuine Falcon report is retained with its provider metadata and artifact. Its conclusions were checked against the target record, exact accession and primary sources described above. Scientific uncertainties are recorded as UNC/UNDECIDED findings rather than a request for another reviewer to perform this assessment.