mating projection base

GO:0001400 · Appendage · Subcellular region · Proposed

The region where the mating projection meets the bulk of the cell, in unicellular fungi exposed to mating pheromone. [GO:0001400]

Synonyms: base of shmoo tip; conjugation tube base

Part of: mating projection (GO:0005937)

Taxonomic distribution

NCBITaxon:4932 Saccharomyces cerevisiae — VARIABLE: Haploid budding-yeast cells have a mating projection base only when pheromone induces a mating projection. [DOI:10.1091/mbc.3.4.429]

NCBITaxon:4932 Saccharomyces cerevisiae — Budding-yeast model in which pheromone treatment induces a mating projection with a base adjoining the mother-cell body. [DOI:10.1091/mbc.3.4.429]

The mating projection base is the basal region of a fungal mating projection where the pheromone-induced outgrowth meets the bulk cell.

Subject	Predicate	Object	Evidence
mating projection base	is part of	mating projection	`GO:0001400` GO:0001400 defines the mating projection base as the region where the mating projection meets the bulk of a pheromone-exposed unicellular fungal cell.

INTERPRETATION (RESOLVED): Keep the mating projection base distinct from the whole projection, projection tip, membrane, and septin substructures. GO:0001400 denotes the basal region of GO:0005937, not the whole projection, the GO:0043332 tip, the GO:0070250 membrane, or the GO:0032175/GO:0032162 septin structures that can occupy the neck.

GO:0001400 Gene Ontology cellular-component term for the mating projection base.
GO:0110165 OLS reports GO:0110165 cellular anatomical structure as the GO:0001400 is-a parent.
GO:0005937 OLS reports GO:0001400 mating projection base as part of the mating projection.
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.

2026-09-30T21:29:56Z codex · CREATED_RECORD — Scaffolded by scripts/new_record.py
2026-09-30T21:31:12Z codex · EXPANDED_RECORD — Added GO synonymy, cellular-anatomical-structure parentage, mating-projection parthood, Saccharomyces scope, a GO-backed topology graph, and a boundary discussion for neighboring projection substructures.