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    FEBS Lett. 2003 Feb 27;537(1-3):35-41.

    Bsp1p/Ypr171p is an adapter that directly links some synaptojanin family members to the cortical actin cytoskeleton in yeast.

    Wicky S, Frischmuth S, Singer-Krüger B.

    Institute for Biochemistry, University of Stuttgart, Pfaffenwaldring 55, Germany.

    In this study we identified a novel protein, Bsp1p, that interacts directly with two yeast synaptojanins, Sjl2p and Sjl3p, but not with Sjl1p. The interaction takes place via the Sac1/polyphosphoinositide phosphatase domain, whose conserved C-terminal region is important for binding. Subcellular localization and genetic interactions revealed a function of Bsp1p in the cortical actin cytoskeleton. A fraction of Bsp1p was found to be membrane-associated. Studies with mutants of phosphatidylinositol 4-kinase, PIK1, suggested that the interaction with membranes is facilitated by phosphoinositides. We propose that Bsp1p is an adapter that links Sjl2p and Sjl3p to the cortical actin cytoskeleton.

    PMID: 12606027 [PubMed - indexed for MEDLINE]

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