oral apparatus
Complex basket- or funnel-like structure used by the cell to collect food and channel it to the cytostome; includes specialized sub-structures made up of closely-spaced cilia and underlying basal bodies and fibrillar systems. [GO:0031912]
Has part: deep fiber (GO:0032123)
Taxonomic distribution
NCBITaxon:5878Ciliophora — COMMON: GO scopes the oral apparatus to the ciliate-protozoan feeding structure rather than oral structures of multicellular animals. [GO:0031912]
Canonical examples
NCBITaxon:5911Tetrahymena thermophila — Ciliate model covered by Frankel's Methods in Cell Biology review that supplied the GO oral-apparatus definition. [DOI:10.1016/S0091-679X(08)61528-9]
Functions
- food collection and cytostome channeling — The ciliate oral apparatus collects food and channels it toward the cytostome for cellular ingestion.
GO:0031912GO:0031912 defines the oral apparatus as a basket- or funnel-like ciliate structure that collects food and channels it to the cytostome.
Mechanism graphs
Oral-apparatus topology for feeding (FUNCTION)
The oral apparatus is a ciliate feeding structure with specialized ciliary, basal-body and fibrillar substructures; deep fibers are GO-modeled oral-apparatus parts, and the whole apparatus directs collected material toward the cytostome.
| Subject | Predicate | Object | Evidence |
|---|---|---|---|
| deep fiber | is part of | oral apparatus |
|
| oral apparatus | directs food to | cytostome |
|
Discussions
- INTERPRETATION (RESOLVED): Keep the ciliate oral apparatus distinct from its cytostome and deep-fiber substructures. GO:0031912 denotes the whole ciliate feeding apparatus that collects food and channels it to the cytostome. GO:0031910 denotes a cytostome opening, and GO:0032123 denotes the narrower deep-fiber oral-apparatus substructure.
- CURATION_TODO (OPEN): Resolve exact ciliary, basal-body and fibrillar components before adding molecular constituents. GO:0031912 states that the oral apparatus includes closely spaced cilia, underlying basal bodies and fibrillar systems, but this first GO-backed record does not guess exact source-neutral component groundings for those substructures.
Evidence
GO:0031912Gene Ontology cellular-component term for the ciliate oral apparatus.GO:0110165OLS reports GO:0110165 cellular anatomical structure as the direct GO:0031912 parent.GO:0032123OLS reports GO:0032123 deep fiber as a direct GO:0031912 child and as part of the oral apparatus.DOI:10.1016/S0091-679X(08)61528-9Frankel 2000, Cell biology of Tetrahymena thermophila, Methods in Cell Biology.
Curation history
2026-09-30T19:46:57Zcodex · CREATED_RECORD — Scaffolded by scripts/new_record.py2026-09-30T19:48:39Zcodex · EXPANDED_RECORD — Added cellular-anatomical-structure parentage, deep-fiber has-part topology, Ciliophora and Tetrahymena scope, GO-backed food-channeling function, an oral-apparatus topology graph, and boundary and component-grounding discussions.2026-09-30T20:13:58Zcodex · ADDRESSED_REVIEW — Resolved #1839 from PR #1838 by removing an unsupported generic food CHEMICAL node and retaining only the GO-backed oral-apparatus to cytostome topology edge.