6TA3

Human kinesin-5 motor domain in the GSK-1 state bound to microtubules (Conformation 1)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.80 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Structure of Microtubule-Trapped Human Kinesin-5 and Its Mechanism of Inhibition Revealed Using Cryoelectron Microscopy.

Pena, A.Sweeney, A.Cook, A.D.Topf, M.Moores, C.A.

(2020) Structure 28: 450-457.e5

  • DOI: https://doi.org/10.1016/j.str.2020.01.013
  • Primary Citation of Related Structures:  
    6TA3, 6TA4, 6TIW

  • PubMed Abstract: 

    Kinesin-5 motors are vital mitotic spindle components, and disruption of their function perturbs cell division. We investigated the molecular mechanism of the human kinesin-5 inhibitor GSK-1, which allosterically promotes tight microtubule binding. GSK-1 inhibits monomeric human kinesin-5 ATPase and microtubule gliding activities, and promotes the motor's microtubule stabilization activity. Using cryoelectron microscopy, we determined the 3D structure of the microtubule-bound motor-GSK-1 at 3.8 Å overall resolution. The structure reveals that GSK-1 stabilizes the microtubule binding surface of the motor in an ATP-like conformation, while destabilizing regions of the motor around the empty nucleotide binding pocket. Density corresponding to GSK-1 is located between helix-α4 and helix-α6 in the motor domain at its interface with the microtubule. Using a combination of difference mapping and protein-ligand docking, we characterized the kinesin-5-GSK-1 interaction and further validated this binding site using mutagenesis. This work opens up new avenues of investigation of kinesin inhibition and spindle perturbation.


  • Organizational Affiliation

    Institute of Structural and Molecular Biology, Birkbeck College, London WC1E 7HX, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tubulin beta chainA [auth B]429Sus scrofaMutation(s): 0 
UniProt
Find proteins for P02554 (Sus scrofa)
Explore P02554 
Go to UniProtKB:  P02554
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02554
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Tubulin alpha-1B chainB [auth A]438Sus scrofaMutation(s): 0 
EC: 3.6.5
UniProt
Find proteins for Q2XVP4 (Sus scrofa)
Explore Q2XVP4 
Go to UniProtKB:  Q2XVP4
Entity Groups  
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UniProt GroupQ2XVP4
Sequence Annotations
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Kinesin-like protein KIF11C [auth K]391Homo sapiensMutation(s): 0 
Gene Names: KIF11EG5KNSL1TRIP5
UniProt & NIH Common Fund Data Resources
Find proteins for P52732 (Homo sapiens)
Explore P52732 
Go to UniProtKB:  P52732
PHAROS:  P52732
GTEx:  ENSG00000138160 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP52732
Sequence Annotations
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  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
MZK BindingDB:  6TA3 Ki: min: 1.7, max: 109 (nM) from 3 assay(s)
IC50: min: 0.45, max: 2090 (nM) from 8 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.80 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom202679/Z/16/Z and 206166/Z/17/Z
Medical Research Council (United Kingdom)United KingdomMR/J003867/1
Medical Research Council (United Kingdom)United KingdomMR/N013867/1

Revision History  (Full details and data files)

  • Version 1.0: 2020-04-22
    Type: Initial release