3tfm | pdb_00003tfm

Myosin X PH1N-PH2-PH1C tandem

spinqualitylabelsall models 3tfm, resolution 2.53Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3tfm is a 1 chain structure with sequence from Buffalo rat. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: PO4 Gene: Myo10 (Buffalo rat) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Myosin X (MyoX) is an unconventional myosin that is known to induce the formation and elongation of filopodia in many cell types. MyoX-induced filopodial induction requires the three PH domains in its tail region, although with unknown underlying molecular mechanisms. MyoX's first PH domain is split into halves by its second PH domain. We show here that the PH1(N)-PH2-PH1(C) tandem allows MyoX to bind to phosphatidylinositol (3,4,5)-triphosphate [PI(3,4,5)P(3)] with high specificity and cooperativity. We further show that PH2 is responsible for the specificity of the PI(3,4,5)P(3) interaction, whereas PH1 functions to enhance the lipid membrane-binding avidity of the tandem. The structure of the MyoX PH1(N)-PH2-PH1(C) tandem reveals that the split PH1, PH2, and the highly conserved interdomain linker sequences together form a rigid supramodule with two lipid-binding pockets positioned side by side for binding to phosphoinositide membrane bilayers with cooperativity. Finally, we demonstrate that disruption of PH2-mediated binding to PI(3,4,5)P(3) abolishes MyoX's function in inducing filopodial formation and elongation. Structural basis of the myosin X PH1N-PH2-PH1C tandem as a specific and acute cellular PI(3,4,5)P3 sensor.,Lu Q, Yu J, Yan J, Wei Z, Zhang M Mol Biol Cell. 2011 Nov;22(22):4268-78. Epub 2011 Sep 30. PMID:21965296 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Myosin 3D Structures

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