Seed germination is blocked in Arabidopsis putative vacuolar sorting receptor (atbp80) antisense transformants.

The membrane receptor protein from pea, peabp80, has been shown to function by in vitro binding studies, and in vivo in yeast mutant, as a vacuolar sorting receptor (VSR). Families of proteins with homology to peabp80 have been identified in many plants including Arabidopsis: The family of membrane receptors, atbp80a-f (Arabidopsis thaliana binding protein 80 kDa) is highly homologous to peabp80 and may also function as vacuolar sorting receptors. Interactions with vacuolar sorting determinants have been shown only in vitro for atbp80b.