The proteins featured in this family are all eukaryotic, and many of them are annotated as being Gryzun. Gryzun is distantly related to, but distinct from, the Trs130 subunit of the TRAPP complex but is absent from S. cerevisiae. RNAi of human Gryzun (Swiss:Q7Z392) blocks Golgi exit. Thus the family is likely to be involved with trafficking of proteins through membranes, perhaps as part of the TRAPP complex.

1: A genome-wide RNA interference screen identifies two novel components of the metazoan secretory pathway. Wendler F, Gillingham AK, Sinka R, Rosa-Ferreira C, Gordon DE, Franch-Marro X, Peden AA, Vincent JP, Munro S; EMBO J. 2009; [Epub ahead of print] PMID:19942856