2qac

The closed MTIP-MyosinA-tail complex from the malaria parasite invasion machinery

spinqualitylabelsall models 2qac, resolution 1.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2qac is a 2 chain structure with sequence from Plaf7. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. NonStd Res: SAC Related: 2auc Gene: PFL2225w (PLAF7) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [MYOA_PLAYO] Myosins are actin-based motor molecules with ATPase activity. Unconventional myosins serve in intracellular movements. Their highly divergent tails are presumed to bind to membranous compartments, which would be moved relative to actin filaments (By similarity). Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The Myosin A-tail interacting protein (MTIP) of the malaria parasite links the actomyosin motor of the host cell invasion machinery to its inner membrane complex. We report here that at neutral pH Plasmodium falciparum MTIP in complex with Myosin A adopts a compact conformation, with its two domains completely surrounding the Myosin A-tail helix, dramatically different from previously observed extended MTIP structures. Crystallographic and mutagenesis studies show that H810 and K813 of Myosin A are key players in the formation of the compact MTIP:Myosin A complex. Only the unprotonated state of Myosin A-H810 is compatible with the compact complex. Most surprisingly, every side-chain atom of Myosin A-K813 is engaged in contacts with MTIP. While this side-chain was previously considered to prevent a compact conformation of MTIP with Myosin A, it actually appears to be essential for the formation of the compact complex. The hydrophobic pockets and adaptability seen in the available series of MTIP structures bodes well for the discovery of inhibitors of cell invasion by malaria parasites. The closed MTIP-myosin A-tail complex from the malaria parasite invasion machinery.,Bosch J, Turley S, Roach CM, Daly TM, Bergman LW, Hol WG J Mol Biol. 2007 Sep 7;372(1):77-88. Epub 2007 Jun 9. PMID:17628590 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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