CG18507 (M9PBB3): evidence and ProtNLM claim review

CG18507 is a 510-residue DUF4481-domain protein with two predicted transmembrane helices. It is likely a membrane-associated protein, but its molecular activity, organelle distribution, and biological pathway remain unresolved.

Exact input: M9PBB3, 510 residues. The accession was fetched explicitly with the gene-directory alias; no canonical-sequence substitution is made.

Raw emitted predictions: CG18507-predictions-source.json. Source features: CG18507-uniprot.txt, with an exact extraction in CG18507-sequence-evidence.json.

Sequence and domain evidence

These are sequence/domain observations or explicitly named feature predictions, not measurements of biological function. ARBA assertions and ProtNLM-derived UniProt names are not counted as validation.

DR   InterPro; IPR028054; DUF4481.
FT   TRANSMEM        292..310
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"
FT   TRANSMEM        316..339
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"

ProtNLM claims

The snapshot emits names and location/keyword statements, with no GO or EC prediction for this target. Each actual statement is assessed below; no GO term has been substituted for it. Categories follow the function-prediction rubric, with nonspecific “uncharacterized” names marked UNC because they contain no testable function. CNN records an independently supported existing annotation; it does not assert a particular training-set composition.

Kind Verbatim emitted statement Assessment Evidence and limitation
Name Uncharacterized protein UNC Uncharacterized protein is nonspecific and supplies no testable function. The current UniProt TMEM268 name is explicitly generated by ProtNLM and is not independent validation.
Location Membrane (SL-0162) COR Two Phobius-predicted transmembrane helices at residues 292-310 and 316-339 provide specific sequence support for the broad membrane claim. This is an inference from membrane-spanning architecture; it does not identify an organelle or physiological function.

Literature evidence

No target-specific primary finding is used to establish a molecular activity here. The current assessment is bounded by exact-record architecture and the explicitly identified curated inferences.

Annotation decisions

The accession-specific GOA fetch contains no existing annotation rows. The molecular activity remains unresolved; no broad GO root or invented function is added to create apparent coverage.

Research provenance

Genuine external literature research is requested through the repository Falcon wrapper, with perplexity-lite configured as fallback. Provider output is retained separately as CG18507-deep-research-<provider>.md; its source leads are checked against the underlying publications and exact sequence record.