Most if not all vesicular membrane fusion events in eukaryotic cells are believed to be mediated by a conserved fusion machinery, the SNARE [soluble N-ethylmaleimide-sensitive factor (NSF) attachment protein (SNAP) receptors] machinery. The SNARE domain is thought to act as a protein-protein interaction module in the assembly of a SNARE protein complex [1].

1: A conserved domain is present in different families of vesicular fusion proteins: a new superfamily. Weimbs T, Low SH, Chapin SJ, Mostov KE, Bucher P, Hofmann K; Proc Natl Acad Sci U S A 1997;94:3046-3051. PMID:9096343