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- PDB-4etp: C-terminal motor and motor homology domain of Kar3Vik1 fused to a... -
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Basic information
Entry | Database: PDB / ID: 4etp | ||||||
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Title | C-terminal motor and motor homology domain of Kar3Vik1 fused to a synthetic heterodimeric coiled coil | ||||||
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![]() | MOTOR PROTEIN / Kinesin Motor Protein / Kinesin Motor Homology Domain / karyogamy / mitosis / microtubules / internal Vik1 crosslink with N / N-Ethylenebis(iodoacetamide) / Nucleus | ||||||
Function / homology | ![]() minus-end-directed kinesin ATPase / microtubule bundle formation involved in mitotic spindle midzone assembly / nuclear migration involved in conjugation with cellular fusion / protein transport along microtubule to mitotic spindle pole body / karyogamy involved in conjugation with cellular fusion / cytoskeletal anchor activity / minus-end-directed microtubule motor activity / spindle pole body / kinesin complex / mitotic sister chromatid cohesion ...minus-end-directed kinesin ATPase / microtubule bundle formation involved in mitotic spindle midzone assembly / nuclear migration involved in conjugation with cellular fusion / protein transport along microtubule to mitotic spindle pole body / karyogamy involved in conjugation with cellular fusion / cytoskeletal anchor activity / minus-end-directed microtubule motor activity / spindle pole body / kinesin complex / mitotic sister chromatid cohesion / cytoplasmic microtubule / microtubule-based process / regulation of mitotic spindle organization / isomerase activity / meiotic cell cycle / spindle pole / chromosome / mitotic cell cycle / microtubule binding / microtubule / cell division / ATP hydrolysis activity / ATP binding / nucleus / cytoplasm Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ![]() ![]() ![]() | ||||||
![]() | Rank, K.C. / Chen, C.J. / Cope, J. / Porche, K. / Hoenger, A. / Gilbert, S.P. / Rayment, I. | ||||||
![]() | ![]() Title: Kar3Vik1, a member of the kinesin-14 superfamily, shows a novel kinesin microtubule binding pattern. Authors: Katherine C Rank / Chun Ju Chen / Julia Cope / Ken Porche / Andreas Hoenger / Susan P Gilbert / Ivan Rayment / ![]() Abstract: Kinesin-14 motors generate microtubule minus-end-directed force used in mitosis and meiosis. These motors are dimeric and operate with a nonprocessive powerstroke mechanism, but the role of the ...Kinesin-14 motors generate microtubule minus-end-directed force used in mitosis and meiosis. These motors are dimeric and operate with a nonprocessive powerstroke mechanism, but the role of the second head in motility has been unclear. In Saccharomyces cerevisiae, the Kinesin-14 Kar3 forms a heterodimer with either Vik1 or Cik1. Vik1 contains a motor homology domain that retains microtubule binding properties but lacks a nucleotide binding site. In this case, both heads are implicated in motility. Here, we show through structural determination of a C-terminal heterodimeric Kar3Vik1, electron microscopy, equilibrium binding, and motility that at the start of the cycle, Kar3Vik1 binds to or occludes two αβ-tubulin subunits on adjacent protofilaments. The cycle begins as Vik1 collides with the microtubule followed by Kar3 microtubule association and ADP release, thereby destabilizing the Vik1-microtubule interaction and positioning the motor for the start of the powerstroke. The results indicate that head-head communication is mediated through the adjoining coiled coil. | ||||||
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Download
PDBx/mmCIF format | ![]() | 296.4 KB | Display | ![]() |
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PDB format | ![]() | 237.4 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Summary document | ![]() | 1019.1 KB | Display | ![]() |
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Full document | ![]() | 1 MB | Display | |
Data in XML | ![]() | 28.8 KB | Display | |
Data in CIF | ![]() | 40.3 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
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Links
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Assembly
Deposited unit | ![]()
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Unit cell |
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Components
-Protein , 2 types, 2 molecules AB
#1: Protein | Mass: 45178.941 Da / Num. of mol.: 1 / Fragment: Kar3 (unp residues 352-729) / Mutation: C391L, C469A, C517A, C566V, C655V) Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: KAR3, kar3p, P9659.16, YPR141C / Plasmid: pET24d / Production host: ![]() ![]() |
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#2: Protein | Mass: 38478.742 Da / Num. of mol.: 1 / Fragment: Vik1 (unp residues 341-647) / Mutation: C377V, C436A, C536A, C596A, C640A, E355C, K423C) Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Strain: ATCC 204508 / S288c / Gene: VIK1, Vik1p, YPL253C / Plasmid: pKLD37 / Production host: ![]() ![]() |
-Non-polymers , 5 types, 255 molecules ![](data/chem/img/ADP.gif)
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![](data/chem/img/GOL.gif)
![](data/chem/img/EBC.gif)
![](data/chem/img/HOH.gif)
![](data/chem/img/MG.gif)
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#3: Chemical | ChemComp-ADP / | ||||
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#4: Chemical | ChemComp-MG / | ||||
#5: Chemical | ChemComp-GOL / #6: Chemical | ChemComp-EBC / | #7: Water | ChemComp-HOH / | |
-Details
Nonpolymer details | THE STARTING MATERIAL USED FOR CROSS LINKING CONTAINED A IODINE ATOM THAT HAS LEAVED UPON REACTION ...THE STARTING MATERIAL USED FOR CROSS LINKING CONTAINED A IODINE ATOM THAT HAS LEAVED UPON REACTION WITH CYS. THE FINAL PRODUCT CORRESPOND |
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Sequence details | NATIVE KAR3VIK1 CONTAINS EXTENSIVE BUT WEAK COILED-COIL. FOR CRYSTALLIZATION, ALL BUT THE LAST C- ...NATIVE KAR3VIK1 CONTAINS EXTENSIVE BUT WEAK COILED-COIL. FOR CRYSTALLIZ |
-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 2.86 Å3/Da / Density % sol: 57.04 % |
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Crystal grow | Temperature: 277 K / Method: evaporation / pH: 7.5 Details: 16% monomethyl polyethylene glycol 2000, 100 mM Hepes, 50 mM sodium citrate, Batch, pH 7.5, EVAPORATION, temperature 277K |
-Data collection
Diffraction | Mean temperature: 100 K |
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Diffraction source | Source: ![]() ![]() ![]() |
Detector | Type: ADSC QUANTUM 315 / Detector: CCD / Date: Dec 2, 2010 |
Radiation | Monochromator: Rosenbaum-Rock high-resolution double-crystal monochromator. LN2 cooled first crystal, sagittal focusing 2nd crystal Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 0.979206 Å / Relative weight: 1 |
Reflection | Resolution: 2.3→25 Å / Num. all: 43354 / Num. obs: 43179 / % possible obs: 99.9 % / Observed criterion σ(F): 0 / Observed criterion σ(I): -3 / Redundancy: 8.6 % / Rmerge(I) obs: 0.051 / Rsym value: 0.069 / Net I/σ(I): 19.7 |
Reflection shell | Resolution: 2.3→2.34 Å / Redundancy: 6.2 % / Rmerge(I) obs: 0.601 / Mean I/σ(I) obs: 3.2 / Num. unique all: 2701 / Rsym value: 0.593 / % possible all: 99.8 |
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Processing
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Refinement | Method to determine structure: ![]() Starting model: pdb entry 3KAR and 2O0A Resolution: 2.3→24.97 Å / Cor.coef. Fo:Fc: 0.95 / Cor.coef. Fo:Fc free: 0.936 / SU B: 10.825 / SU ML: 0.142 / Cross valid method: THROUGHOUT / σ(F): 0 / ESU R: 0.274 / ESU R Free: 0.215 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: HYDROGENS HAVE BEEN USED IF PRESENT IN THE INPUT
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Solvent computation | Ion probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1 Å / Solvent model: MASK | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 69.055 Å2
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Refinement step | Cycle: LAST / Resolution: 2.3→24.97 Å
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Refine LS restraints |
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LS refinement shell | Resolution: 2.301→2.361 Å / Total num. of bins used: 20
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Refinement TLS params. | Method: refined / Refine-ID: X-RAY DIFFRACTION
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Refinement TLS group |
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