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    Mol Cell. 1999 Jun;3(6):805-11.

    Phosphatidylinositol 3-phosphate recognition by the FYVE domain.

    Source

    Department of Pharmacology, University of Colorado Health Sciences Center, Denver 80262, USA.

    Abstract

    Recognition of phosphatidylinositol 3-phosphate (Ptdlns(3)P) is crucial for a broad range of cellular signaling and membrane trafficking events regulated by phosphoinositide (PI) 3-kinases. PtdIns(3)P binding by the FYVE domain of human early endosome autoantigen 1 (EEA1), a protein implicated in endosome fusion, involves two beta hairpins and an alpha helix. Specific amino acids, including those of the FYVE domain's conserved RRHHCRQCGNIF motif, contact soluble and micelle-embedded lipid and provide specificity for Ptdlns(3)P over Ptdlns(5)P and Ptdlns, as shown by heteronuclear magnetic resonance spectroscopy. Although the FYVE domain relies on a zinc-binding motif reminiscent of RING fingers, it is distinguished by ovel structural features and its ptdlns(3)P-binding site.

    PMID:
    10394369
    [PubMed - indexed for MEDLINE]

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