2zfi

Crystal Structure of the Kif1A Motor Domain Before Mg Release

spinqualitylabelsall models 2zfi, resolution 1.55Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2zfi is a 1 chain structure with sequence from Lk3 transgenic mice. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ADP, MG Related: 1vfv, 1vfw, 1vfx, 1vfz, 1i6i, 1i5s, 2zfj, 2zfk, 2zfl, 2zfm Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [KIF1A_MOUSE] Motor for anterograde axonal transport of synaptic vesicle precursors. 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 Mg-ADP release is considered to be a crucial process for the regulation and motility of kinesin. To gain insight into the structural basis of this process, we solved the atomic structures of kinesin superfamily protein-1A (KIF1A) during and after Mg(2+) release. On the basis of new structural and mutagenesis data, we propose a model mechanism for microtubule activation of Mg-ADP release from KIF1A. In our model, a specific interaction between loop L7 of KIF1A and beta-tubulin reconfigures the KIF1A active site by shifting the relative positions of switches I and II. This leads to the sequential release of a group of water molecules that sits over the Mg(2+) in the active site, followed by Mg(2+) and finally the ADP. We further propose that this set of events is linked to a strain-dependent docking of the neck linker to the motor core, which produces a two-step power stroke. Structural model for strain-dependent microtubule activation of Mg-ADP release from kinesin.,Nitta R, Okada Y, Hirokawa N Nat Struct Mol Biol. 2008 Oct;15(10):1067-75. Epub 2008 Sep 21. PMID:18806800 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Kinesin

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