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  • Title: A pumpkin 72-kDa membrane protein of precursor-accumulating vesicles has characteristics of a vacuolar sorting receptor.
    Author: Shimada T, Kuroyanagi M, Nishimura M, Hara-Nishimura I.
    Journal: Plant Cell Physiol; 1997 Dec; 38(12):1414-20. PubMed ID: 9522472.
    Abstract:
    Precursor-accumulating (PAC) vesicles were previously shown to mediate the transport of the precursor of a major storage protein (pro2S albumin) to protein-storage vacuoles in developing pumpkin cotyledons. In this study, we characterized two homologous proteins from PAC vesicles, a 72 kDa protein (PV72) and an 82 kDa protein (PV82). PV72 and PV82 showed an ability to bind to peptides derived from both an internal propeptide and a C-terminal peptide of pro2S albumin. PV72 was predicted to be a type I integral membrane protein with epidermal growth factor (EGF)-like motifs. These results suggest that PV72 and PV82 are potential sorting receptors for 2S albumin to protein-storage vacuoles.
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