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  • Title: RMA1, an Arabidopsis thaliana gene whose cDNA suppresses the yeast sec15 mutation, encodes a novel protein with a RING finger motif and a membrane anchor.
    Author: Matsuda N, Nakano A.
    Journal: Plant Cell Physiol; 1998 May; 39(5):545-54. PubMed ID: 9664717.
    Abstract:
    To identify molecules that function in the plant secretory pathway, we screened for Arabidopsis thaliana cDNA clones that complement the temperature-sensitive (ts), secretion-deficient sec15 mutation of yeast Saccharomyces cerevisiae. RMA1, one of the genes obtained in this screening, suppressed not only the ts growth of sec15 but also its secretory defect. RMA1 is not a structural homologue of SEC15 but encodes a novel 28 kDa protein with a RING finger motif and a C-terminal membrane-anchoring domain. Mutational analysis indicates that the RING finger motif of RMA1 is important for its suppression activity. In Arabidopsis plant, RMA1 is ubiquitously expressed. A search for homologous proteins in the database revealed that Arabidopsis, nematode, mouse and human possess close homologues of RMA1.
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