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  • Title: Characterization of the interaction domains of Ure2p, a prion-like protein of yeast.
    Author: Fernandez-Bellot E, Guillemet E, Baudin-Baillieu A, Gaumer S, Komar AA, Cullin C.
    Journal: Biochem J; 1999 Mar 01; 338 ( Pt 2)(Pt 2):403-7. PubMed ID: 10024516.
    Abstract:
    In the yeast Saccharomyces cerevisiae, the non-Mendelian inherited genetic element [URE3] behaves as a prion. A hypothesis has been put forward which states that [URE3] arises spontaneously from its cellular isoform Ure2p (the product of the URE2 gene), and propagates through interactions of the N-terminal domain of the protein, thus leading to its aggregation and loss of function. In the present study, various N- and C-terminal deletion mutants of Ure2p were constructed and their cross-interactions were tested in vitro and in vivo using affinity binding and a two-hybrid analysis. We show that the self-interaction of the protein is mediated by at least two domains, corresponding to the first third of the protein (the so-called prion-forming domain) and the C-terminal catalytic domain.
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