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- PDB-9l7e: Crystal structure of human kinesin-1 motor domain (G234A mutant) ... -
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Basic information
Entry | Database: PDB / ID: 9l7e | ||||||
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Title | Crystal structure of human kinesin-1 motor domain (G234A mutant) in complex with ADP | ||||||
![]() | Kinesin-1 heavy chain | ||||||
![]() | MOTOR PROTEIN / Kinesin | ||||||
Function / homology | ![]() regulation of modification of synapse structure, modulating synaptic transmission / plus-end-directed vesicle transport along microtubule / cytoplasm organization / anterograde dendritic transport of neurotransmitter receptor complex / cytolytic granule membrane / anterograde neuronal dense core vesicle transport / mitocytosis / retrograde neuronal dense core vesicle transport / anterograde axonal protein transport / vesicle transport along microtubule ...regulation of modification of synapse structure, modulating synaptic transmission / plus-end-directed vesicle transport along microtubule / cytoplasm organization / anterograde dendritic transport of neurotransmitter receptor complex / cytolytic granule membrane / anterograde neuronal dense core vesicle transport / mitocytosis / retrograde neuronal dense core vesicle transport / anterograde axonal protein transport / vesicle transport along microtubule / lysosome localization / positive regulation of potassium ion transport / plus-end-directed microtubule motor activity / Kinesins / RHO GTPases activate KTN1 / kinesin complex / microtubule motor activity / centrosome localization / mitochondrion transport along microtubule / COPI-dependent Golgi-to-ER retrograde traffic / ciliary rootlet / microtubule-based movement / stress granule disassembly / natural killer cell mediated cytotoxicity / synaptic vesicle transport / Insulin processing / postsynaptic cytosol / phagocytic vesicle / axon cytoplasm / dendrite cytoplasm / MHC class II antigen presentation / axon guidance / regulation of membrane potential / positive regulation of synaptic transmission, GABAergic / positive regulation of protein localization to plasma membrane / cellular response to type II interferon / centriolar satellite / Signaling by ALK fusions and activated point mutants / microtubule binding / nuclear membrane / vesicle / microtubule / cadherin binding / protein-containing complex binding / perinuclear region of cytoplasm / ATP hydrolysis activity / mitochondrion / ATP binding / identical protein binding / membrane / cytosol / cytoplasm Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ![]() ![]() ![]() | ||||||
![]() | Makino, T. / Miyazono, K. / Tanokura, M. / Tomishige, M. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Tension-induced suppression of allosteric conformational changes coordinates kinesin-1 stepping. Authors: Tsukasa Makino / Ryo Kanada / Teppei Mori / Ken-Ichi Miyazono / Yuta Komori / Haruaki Yanagisawa / Shoji Takada / Masaru Tanokura / Masahide Kikkawa / Michio Tomishige / ![]() Abstract: Kinesin-1 walks along microtubules by alternating ATP hydrolysis and movement of its two motor domains ("head"). The detached head preferentially binds to the forward tubulin-binding site after ATP ...Kinesin-1 walks along microtubules by alternating ATP hydrolysis and movement of its two motor domains ("head"). The detached head preferentially binds to the forward tubulin-binding site after ATP binds to the microtubule-bound head, but the mechanism preventing premature microtubule binding while the partner head awaits ATP remains unknown. Here, we examined the role of the neck linker, the segment connecting two heads, in this mechanism. Structural analyses of the nucleotide-free head revealed a bulge just ahead of the neck linker's base, creating an asymmetric constraint on its mobility. While the neck linker can stretch freely backward, it must navigate around this bulge to extend forward. We hypothesized that increased neck linker tension suppresses premature binding of the tethered head, which was supported by molecular dynamics simulations and single-molecule fluorescence assays. These findings demonstrate a tension-dependent allosteric mechanism that coordinates the movement of two heads, where neck linker tension modulates the allosteric conformational changes rather than directly affecting the nucleotide state. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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PDBx/mmCIF format | ![]() | 137.8 KB | Display | ![]() |
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PDB format | ![]() | 105.2 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 9l6kC ![]() 9l78C ![]() 9l7mC ![]() 1bg2S C: citing same article ( S: Starting model for refinement |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Unit cell |
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Components
#1: Protein | Mass: 40016.918 Da / Num. of mol.: 1 / Mutation: G234A Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
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#2: Chemical | ChemComp-MG / |
#3: Chemical | ChemComp-ADP / |
#4: Water | ChemComp-HOH / |
Has ligand of interest | Y |
Has protein modification | N |
-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 2.31 Å3/Da / Density % sol: 46.76 % |
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Crystal grow | Temperature: 293 K / Method: vapor diffusion, sitting drop Details: 23% PEG 3350, 100mM Bis-Tris, pH 5.5, VAPOR DIFFUSION, SITTING DROP, temperature 293K |
-Data collection
Diffraction | Mean temperature: 100 K / Serial crystal experiment: N |
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Diffraction source | Source: ![]() ![]() ![]() |
Detector | Type: ADSC QUANTUM 210r / Detector: CCD / Date: Nov 9, 2006 |
Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 1 Å / Relative weight: 1 |
Reflection | Resolution: 2.4→20 Å / Num. obs: 14330 / % possible obs: 99.7 % / Redundancy: 4.2 % / Rmerge(I) obs: 0.052 / Net I/σ(I): 17.9 |
Reflection shell | Resolution: 2.4→2.46 Å / Rmerge(I) obs: 0.412 / Mean I/σ(I) obs: 3.73 / Num. unique obs: 1056 |
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Processing
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Refinement | Method to determine structure: ![]() Starting model: PDB ENTRY 1BG2 Resolution: 2.4→19.55 Å / Cor.coef. Fo:Fc: 0.952 / Cor.coef. Fo:Fc free: 0.926 / SU B: 16.638 / SU ML: 0.189 / Cross valid method: THROUGHOUT / σ(F): 0 / ESU R Free: 0.261 / Stereochemistry target values: MAXIMUM LIKELIHOOD
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Solvent computation | Ion probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.4 Å / Solvent model: MASK | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 45.25 Å2
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Refinement step | Cycle: LAST / Resolution: 2.4→19.55 Å
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