CG32354 (Q9VSK1): evidence and ProtNLM claim review

CG32354 is a 662-residue protein with seven Kazal-like domains and a predicted N-terminal membrane-spanning segment. It is compatible with an extracellular or cell-surface interaction protein; intrinsic protease-inhibitor activity, soluble secretion, and the precise developmental role remain unresolved.

Exact input: Q9VSK1, 662 residues. The accession was fetched explicitly with the gene-directory alias; no canonical-sequence substitution is made.

Raw emitted predictions: CG32354-predictions-source.json. Source features: CG32354-uniprot.txt, with an exact extraction in CG32354-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; IPR002350; Kazal_dom.
DR   InterPro; IPR036058; Kazal_dom_sf.
DR   InterPro; IPR050653; Prot_Inhib_GrowthFact_Antg.
FT   TRANSMEM        57..78
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"
FT   DOMAIN          158..214
FT                   /note="Kazal-like"
FT                   /evidence="ECO:0000259|PROSITE:PS51465"
FT   DOMAIN          215..268
FT                   /note="Kazal-like"
FT                   /evidence="ECO:0000259|PROSITE:PS51465"
FT   DOMAIN          270..322
FT                   /note="Kazal-like"
FT                   /evidence="ECO:0000259|PROSITE:PS51465"
FT   DOMAIN          374..432
FT                   /note="Kazal-like"
FT                   /evidence="ECO:0000259|PROSITE:PS51465"
FT   DOMAIN          438..495
FT                   /note="Kazal-like"
FT                   /evidence="ECO:0000259|PROSITE:PS51465"
FT   DOMAIN          497..550
FT                   /note="Kazal-like"
FT                   /evidence="ECO:0000259|PROSITE:PS51465"
FT   DOMAIN          600..652
FT                   /note="Kazal-like"
FT                   /evidence="ECO:0000259|PROSITE:PS51465"

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	Kazal-like domain-containing protein	CNN	Seven domain features and PROSITE PS51465 independently establish the Kazal-like architecture. This validates the domain name without asserting serine-protease inhibition.
Location	Secreted (SL-0243)	UNC	The extracellular IBA supports an exposed or extracellular protein region, but the exact source has a transmembrane segment at residues 57-78 and no cleavable signal-peptide feature. An ectodomain on a membrane-tethered protein is not equivalent to soluble secretion; topology or shedding evidence is needed.

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

GO:0004867 serine-type endopeptidase inhibitor activity (IEA): UNDECIDED. Repeated Kazal-like domains support a protease-interaction hypothesis, but the exact inhibitory loops and target protease have not been functionally resolved. This fold also occurs in non-inhibitory extracellular proteins.
GO:0005576 extracellular region (IBA): ACCEPT. Seven Kazal-like domains and an N-terminal hydrophobic segment support the existing curated IBA extracellular localization. This does not imply release as a soluble secreted protein.
GO:0030154 cell differentiation (IBA): UNDECIDED. Extracellular Kazal-domain proteins can have regulatory or structural functions; family architecture does not establish which differentiation process this fly protein participates in. The ancestral assertion and target function need resolution.

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 CG32354-deep-research-<provider>.md; its source leads are checked against the underlying publications and exact sequence record.