hyphae septin collar

GO:0062140 · Cytoskeleton · Filament · Proposed

A septin collar in pathogenic fungi involved in the constriction of hyphae at the plant plasmodesma enabling penetration of an adjacent cell. [GO:0062140]

Synonyms: septin collar of invasive hyphae

UniProt location names: UniProt Consortium, CC BY 4.0. Reference label and route sources.

Components

Component	Type	Part of / acts on	Grounding	Genes	Stoichiometry	Essential	Role
septin proteins	Protein	part of	Reviewed label only (reviewed name; no accession asserted)			ESSENTIAL	Septin GTPases that form the pathogenic-fungal hyphae septin collar at plant plasmodesmata. `GO:0062140` GO:0062140 defines the hyphae septin collar as a septin collar in pathogenic fungi. `GO:0032173` GO:0032173 defines the broader septin collar as a structure composed of highly ordered septin filament arrays.

Taxonomic distribution

NCBITaxon:318829 Pyricularia oryzae — VARIABLE: The rice blast fungus Pyricularia oryzae forms Sep5-GFP septin collars at rice cell wall crossing points during invasive hyphal growth. [DOI:10.1126/science.aaq0892]

Canonical examples

NCBITaxon:318829 Pyricularia oryzae — Rice-blast fungus model in which Sakulkoo et al. 2018 observed Sep5-GFP septin collars at plant cell wall crossing points and linked collar organization to Pmk1 signaling during cell-to-cell invasion. [DOI:10.1126/science.aaq0892]

Mechanism graphs

Pathogenic-fungal hyphae septin-collar topology (ASSEMBLY)

Septin proteins form the pathogenic-fungal hyphae septin collar involved in hyphal constriction at plant plasmodesmata.

Subject	Predicate	Object	Evidence
septin proteins	assemble into	hyphae septin collar	`GO:0062140` GO:0062140 identifies the hyphae septin collar as a septin collar in pathogenic fungi. `GO:0032173` GO:0032173 defines the broader collar as composed of septin filaments.

Discussions

INTERPRETATION (RESOLVED): Keep the hyphae septin collar distinct from the broader septin collar and from hyphal septin rings. GO:0062140 denotes the pathogenic-fungal collar involved in invasive-hypha constriction at plant plasmodesmata. GO:0032173 denotes the broader septin collar class, and GO:0032168 denotes a division-plane septin ring within filamentous-fungus hyphae.
CURATION_TODO (OPEN): Resolve exact source-neutral family groundings for hyphae septin-collar septin proteins. The first invasive-hyphae collar record uses a reviewed-label-only septin protein cohort rather than guessing InterPro, Pfam, or NCBIfam accessions that may not exactly delimit all septins in this pathogenic-fungal collar architecture.

Evidence

GO:0062140 Gene Ontology cellular-component term for the hyphae septin collar.
GO:0032173 Gene Ontology cellular-component parent term for the septin collar.
DOI:10.1126/science.aaq0892 Sakulkoo et al. 2018, 'A single fungal MAP kinase controls plant cell-to-cell invasion by the rice blast fungus', Science.

Curation history

2026-09-30T09:08:44Z codex · CREATED_RECORD — Scaffolded by scripts/new_record.py
2026-09-30T09:10:45Z codex · EXPANDED_RECORD — Added invasive-hyphae septin-collar synonymy, septin-collar parentage, a reviewed-label-only septin constituent, Pyricularia scope and canonical example evidence, GO-backed collar topology, and collar-boundary and component-grounding discussions.
2026-09-30T09:32:08Z codex · ADDRESSED_REVIEW — Resolved #1818 from PR #1817 by tightening the Pyricularia taxonomic-distribution and canonical-example notes to cite structure-level Sep5-GFP septin-collar observations.

Source: data/structures/cytoskeleton/hyphae_septin_collar.yaml