Mating factor alpha (IPR016326)

Short name: Mating_factor_a

Overlapping homologous superfamilies


Family relationships



This group represents a mating factor alpha from Saccharomycetales (budding yeasts) [PMID: 6306574]. The alpha-factor is produced by the haploid cells of the alpha mating type, and acts on cells of the opposite mating type (type a). The alpha-pheromone reversibly arrests the growth of these cells in the early G1 period of the cell cycle, which has been suggested to be a method of synchronisation of the two haploid cell cycles prior to mating.

GO terms

Biological Process

GO:0000750 pheromone-dependent signal transduction involved in conjugation with cellular fusion

Molecular Function

GO:0000772 mating pheromone activity

Cellular Component

GO:0005576 extracellular region

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.