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- PDB-5hnx: Structural basis of backwards motion in kinesin-14: minus-end dir... -
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Basic information
Entry | Database: PDB / ID: 5hnx | ||||||
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Title | Structural basis of backwards motion in kinesin-14: minus-end directed nKn664 in the nucleotide-free state | ||||||
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![]() | STRUCTURAL PROTEIN/MOTOR PROTEIN / kinesin / kinesin-14 / microtubule / ATPase / STRUCTURAL PROTEIN-MOTOR PROTEIN complex | ||||||
Function / homology | ![]() minus-end directed microtubule sliding / distributive segregation / regulation of mitotic spindle elongation / meiotic spindle assembly / mitotic spindle elongation / mitotic spindle microtubule / meiotic spindle organization / spindle assembly involved in female meiosis / regulation of mitotic spindle assembly / minus-end-directed microtubule motor activity ...minus-end directed microtubule sliding / distributive segregation / regulation of mitotic spindle elongation / meiotic spindle assembly / mitotic spindle elongation / mitotic spindle microtubule / meiotic spindle organization / spindle assembly involved in female meiosis / regulation of mitotic spindle assembly / minus-end-directed microtubule motor activity / microtubule bundle formation / meiotic spindle / mitotic centrosome separation / positive regulation of axon guidance / spindle organization / microtubule-based process / mitotic spindle assembly / mRNA transport / mitotic spindle organization / chromosome segregation / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / structural constituent of cytoskeleton / microtubule cytoskeleton organization / spindle / microtubule cytoskeleton / nervous system development / mitotic cell cycle / microtubule binding / microtubule / hydrolase activity / protein heterodimerization activity / cell division / GTPase activity / centrosome / GTP binding / protein homodimerization activity / ATP binding / nucleus / metal ion binding / cytoplasm / cytosol Similarity search - Function | ||||||
Biological species | ![]() ![]() ![]() ![]() ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / helical reconstruction / cryo EM / Resolution: 6.6 Å | ||||||
![]() | Shigematsu, H. / Yokoyama, T. / Kikkawa, M. / Shirouzu, M. / Nitta, R. | ||||||
![]() | ![]() Title: Structural Basis of Backwards Motion in Kinesin-1-Kinesin-14 Chimera: Implication for Kinesin-14 Motility. Authors: Masahiko Yamagishi / Hideki Shigematsu / Takeshi Yokoyama / Masahide Kikkawa / Mitsuhiro Sugawa / Mari Aoki / Mikako Shirouzu / Junichiro Yajima / Ryo Nitta / ![]() Abstract: Kinesin-14 is a unique minus-end-directed microtubule-based motor. A swinging motion of a class-specific N-terminal neck helix has been proposed to produce minus-end directionality. However, it is ...Kinesin-14 is a unique minus-end-directed microtubule-based motor. A swinging motion of a class-specific N-terminal neck helix has been proposed to produce minus-end directionality. However, it is unclear how swinging of the neck helix is driven by ATP hydrolysis utilizing the highly conserved catalytic core among all kinesins. Here, using a motility assay, we show that in addition to the neck helix, the conserved five residues at the C-terminal region in kinesin-14, namely the neck mimic, are necessary to give kinesin-1 an ability to reverse its directionality toward the minus end of microtubules. Our structural analyses further demonstrate that the C-terminal neck mimic, in cooperation with conformational changes in the catalytic core during ATP binding, forms a kinesin-14 bundle with the N-terminal neck helix to swing toward the minus end of microtubules. Thus, the neck mimic plays a crucial role in coupling the chemical ATPase reaction with the mechanical cycle to produce the minus-end-directed motility of kinesin-14. | ||||||
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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PDBx/mmCIF format | ![]() | 240.5 KB | Display | ![]() |
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PDB format | ![]() | 184.9 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Summary document | ![]() | 1.1 MB | Display | ![]() |
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Full document | ![]() | 1.2 MB | Display | |
Data in XML | ![]() | 54.7 KB | Display | |
Data in CIF | ![]() | 78.4 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8059MC ![]() 8058C ![]() 8060C ![]() 8061C ![]() 5hnwC ![]() 5hnyC ![]() 5hnzC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Assembly
Deposited unit | ![]()
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Components
-Protein , 3 types, 3 molecules ABK
#1: Protein | Mass: 50107.238 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#2: Protein | Mass: 49907.770 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
#3: Protein | Mass: 41620.250 Da / Num. of mol.: 1 / Fragment: UNP residues 325-348,UNP residues 664-700 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() Gene: ncd / Production host: ![]() ![]() |
-Non-polymers , 4 types, 4 molecules ![](data/chem/img/MG.gif)
![](data/chem/img/GTP.gif)
![](data/chem/img/GDP.gif)
![](data/chem/img/TA1.gif)
![](data/chem/img/GTP.gif)
![](data/chem/img/GDP.gif)
![](data/chem/img/TA1.gif)
#4: Chemical | ChemComp-MG / |
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#5: Chemical | ChemComp-GTP / |
#6: Chemical | ChemComp-GDP / |
#7: Chemical | ChemComp-TA1 / |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: FILAMENT / 3D reconstruction method: helical reconstruction |
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Sample preparation
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Source (recombinant) |
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Buffer solution | pH: 6.8 | ||||||||||||||||||||||||||||||
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||||||||
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Talos Arctica / Image courtesy: FEI Company |
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Microscopy | Model: FEI TECNAI ARCTICA |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD |
Image recording | Electron dose: 30 e/Å2 / Film or detector model: FEI FALCON II (4k x 4k) |
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Processing
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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Helical symmerty | Angular rotation/subunit: -25.725189 ° / Axial rise/subunit: 8.751208 Å / Axial symmetry: C1 |
3D reconstruction | Resolution: 6.6 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 229516 / Details: High-resolution noise substitution was performed / Symmetry type: HELICAL |
Atomic model building | Protocol: FLEXIBLE FIT |