mating projection membrane

GO:0070250 · Appendage · Membrane · Proposed

The portion of the plasma membrane surrounding the mating projection. [GO:0070250]

Part of: mating projection (GO:0005937)

Has part: mating projection tip membrane (GO:0070867)

Components

Component	Type	Part of / acts on	Grounding	Genes	Stoichiometry	Essential	Role
mating projection lipid bilayer	Lipid	part of	Reviewed label only (reviewed name; no accession asserted)			ESSENTIAL	Plasma-membrane lipid bilayer that surrounds the pheromone-induced mating projection and includes the specialized tip membrane domain. `GO:0070250` GO:0070250 identifies the mating projection membrane as the plasma-membrane portion surrounding a mating projection.

NCBITaxon:4932 Saccharomyces cerevisiae — VARIABLE: Haploid budding-yeast cells extend plasma-membrane-bounded mating projections in response to pheromone rather than in every growth state. [DOI:10.1091/mbc.3.4.429]

NCBITaxon:4932 Saccharomyces cerevisiae — Budding-yeast model in which pheromone treatment induces polarized mating projection formation with a surrounding projection membrane and a Spa2-positive projection tip. [DOI:10.1091/mbc.3.4.429]

mating projection membrane boundary — The mating projection membrane is the local plasma-membrane boundary around the pheromone-induced projection and contains the apical tip membrane domain.
- GO:0070250 GO:0070250 identifies the mating projection membrane around the mating projection.
- GO:0005937 GO:0005937 defines the mating projection as the projection formed by unicellular fungi in response to mating pheromone.
- DOI:10.1091/mbc.3.4.429 Read et al. 1992 used pheromone-treated Saccharomyces cerevisiae to study mating projection formation.

The mating projection membrane surrounds the pheromone-induced fungal projection and contains a specialized membrane domain at the projection tip.

Subject	Predicate	Object	Evidence
mating projection membrane	surrounds	mating projection	`GO:0070250` GO:0070250 identifies the membrane portion surrounding a mating projection.
mating projection tip membrane	is part of	mating projection membrane	`GO:0070867` GO:0070867 identifies the mating projection tip membrane as the plasma-membrane portion surrounding a mating projection tip. `GO:0070250` GO:0070250 identifies the mating projection membrane.

CURATION_TODO (OPEN): Resolve an exact source-neutral grounding for the lipid constituent of the mating projection membrane. GO:0070250 identifies the whole mating projection membrane, but the lipid-bilayer constituent is intentionally left as reviewed-label-only until an exact source-neutral lipid or membrane-domain CURIE is curated.

GO:0070250 Gene Ontology cellular-component term for the mating projection membrane.
GO:0005937 Gene Ontology cellular-component term for the mating projection.
GO:0070867 Gene Ontology cellular-component term for the mating projection tip membrane.
DOI:10.1091/mbc.3.4.429 Read et al. 1992, 'Actin- and tubulin-dependent functions during Saccharomyces cerevisiae mating projection formation', Molecular Biology of the Cell.

2026-09-30T05:55:57Z codex · CREATED_RECORD — Scaffolded by scripts/new_record.py
2026-09-30T05:56:43Z codex · EXPANDED_RECORD — Added mating-projection parthood, the GO:0070867 tip membrane substructure, a reviewed-label-only lipid-bilayer component, Saccharomyces scope, projection-membrane boundary evidence, a nonmechanistic membrane topology graph, and a lipid-bilayer grounding TODO.