eukaryotic flagellar autotomy
traitmech:000731 · CLASS · PROPOSED
A physiological phenotype in which a microbial eukaryote sheds its cilia or flagella by regulated severing of their axonemes near the base.
Trait evidence
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DOI:10.1186/1471-2121-4-11fla10 cells lose flagella by deflagellation at 33 degrees C.
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DOI:10.1534/g3.116.034264Wild-type cells deflagellate completely in response to pH shock or dibucaine, regardless of the temperature
Provenance
- Identifier source
- TraitMech local identifier
- Definition source
DOI:10.1186/1471-2121-4-11
Parent traits (1)
kg-microbe context
Matched 1 kg-microbe node via parent_proxy.
METPO:1000059[-2.682, -2.070, -3.656, -0.652, …]
Nearest neighbors in embedding space
- physiology cystine arylamidase activity 1.000
- physiology coagulase activity 1.000
- physiology chemotropism 1.000
- physiology chemotaxis 1.000
- physiology functional cellular rejuvenation 1.000
- physiology cell body or cytoplasmic projection contraction 1.000
- physiology cellular buoyancy 1.000
- physiology coccolith production 1.000
Discussions and Knowledge Gaps
Review the basal axonemal shedding endpoint and its phenotype parent.
This organism-level phenotype concerns regulated release of a eukaryotic cilium or flagellum, not possession, arrangement, assembly failure or nonmotility. Resorption, retained-organelle disassembly, passive breakage, distal vesicle release and premitotic basal-body release alone do not establish the endpoint. Bacterial flagellar ejection or resorption involves a different apparatus and is outside this qualified class. The phenotype parent METPO:1000059 is a definition-based inference; motility is not a required parent. Palmelloid formation traitmech:000654 does not require flagellar loss. No exact synonyms, organism-level disjointness or universal stimulus threshold are asserted.
Review current ontology scope without reviving obsolete morphology identifiers.
The inspected pinned and current METPO release/editor/template scope has no active exact shedding class. Historical METPO:0000089 and METPO:000090 are deprecated with OMO:0001000; METPO:1000381 is deprecated with IAO:0000226. All point to METPO:1000704, which denotes locomotory flagellar possession, not autotomy. Deprecated ciliated METPO:0000093 and METPO:000094 carry OMO:0001000, while METPO:1000385 carries IAO:0000226; no replacement or consider annotation was observed for these or deprecated flagellum METPO:1000123, whose recorded reason is OMO:0001000. Those historical morphology terms are not exact xrefs and are not reactivated. METPO issue https://github.com/berkeleybop/metpo/issues/521 records unresolved reason-code interpretation. Current upstream describes a bacterial/archaeal focus, so adoption of this microbial-eukaryote proposal requires maintainer review. The ontology pin stays unchanged. Proposal v607 reserves METPO:1068400 within 1068400-1068499; no upstream release or human sign-off is implied.
Keep the shedding phenotype separate from universal katanin or sequence-based mechanism claims.
A protein-resolved graph requires taxon-paired authority-checked accessions and edge-specific experiments. Domain, motif, gene or mutant names alone do not establish the organismal phenotype. The p60 study constrains a proposed universal severing mechanism; it does not establish dispensability of every katanin function. No universal FA1, FA2, TRP15, IFT or calcium requirement is asserted. Mechanisms are deferred, not claimed absent.
Evidence
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DOI:10.1242/jcs.096941SUPPORTmicrotubule severing activity of p60 is not required for deflagellation
Resolve strain provenance and preserve source-access limits before adding canonical taxa.
Study organism and strain names remain qualified observations, not canonical taxon assertions. Distinct papers from the Quarmby group are not independent-laboratory replication. MED/Crossref fields and available PubMed/publisher records were checked for notices; this is not comprehensive correction/retraction clearance. Publisher DOI requests failed in the follow-up, some PMC requests returned challenge pages, and the 2003 PubMed page yielded no usable text. Those failures do not negate earlier directly retrieved primary materials, but are not successful source checks. The 2016 supplementary index digest mismatch remains recorded; nine substantive assets matched supplied digests. No paid research, human sign-off or raw-data reanalysis is implied.
Curation history
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MINTED_TRAITMECH_ID · codex
Added the microbial eukaryotic basal-axoneme shedding phenotype with two primary DOI sources and directly checked 10/15-word snippets. Retained native VERIFIED and NOT_IN_ABSTRACT outcomes respectively, plus separate 10-word full-text mechanism-limitation evidence with native NOT_IN_ABSTRACT. Reserved 000731, v607 and 1068400-1068499 after ignored/hidden current-file, retained-history, full-range and open/draft PR checks. No obsolete identifier, canonical taxon, exact mapping or universal protein requirement is inferred. The timestamp records observed acceptance, not a reconstructed acquisition time.
Recorded curation sessions
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· codex
- CREATE — Add eukaryotic flagellar autotomy
Added one PROPOSED microbial eukaryotic basal-axoneme shedding phenotype, with two primary DOI sources and checked 10/15-word snippets. Native VERIFIED and NOT_IN_ABSTRACT remain distinct from direct source verification. Separate 10-word Dymek and Smith 2012 evidence supports only a bounded mechanism limitation, with native NOT_IN_ABSTRACT. Preserved assay, strain, replication and source-access limits. Reserved 000731, v607 and 1068400-1068499 after ignored/hidden current-file, retained-history, full-range and open/draft PR checks. Parent METPO:1000059 is a definition-based inference. No obsolete identifier, canonical taxon, exact mapping or universal protein requirement is inferred. Acceptance timestamp is observed, not a reconstructed acquisition time.
- CREATE — Add eukaryotic flagellar autotomy