1II6

Crystal Structure of the Mitotic Kinesin Eg5 in Complex with Mg-ADP.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.218 

Starting Model: experimental
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This is version 1.4 of the entry. See complete history


Literature

Crystal structure of the mitotic spindle kinesin Eg5 reveals a novel conformation of the neck-linker.

Turner, J.Anderson, R.Guo, J.Beraud, C.Fletterick, R.Sakowicz, R.

(2001) J Biol Chem 276: 25496-25502

  • DOI: https://doi.org/10.1074/jbc.M100395200
  • Primary Citation of Related Structures:  
    1II6

  • PubMed Abstract: 

    Success of mitosis depends upon the coordinated and regulated activity of many cellular factors, including kinesin motor proteins, which are required for the assembly and function of the mitotic spindle. Eg5 is a kinesin implicated in the formation of the bipolar spindle and its movement prior to and during anaphase. We have determined the crystal structure of the Eg5 motor domain with ADP-Mg bound. This structure revealed a new intramolecular binding site of the neck-linker. In other kinesins, the neck-linker has been shown to be a critical mechanical element for force generation. The neck-linker of conventional kinesin is believed to undergo an ordered-to-disordered transition as it translocates along a microtubule. The structure of Eg5 showed an ordered neck-linker conformation in a position never observed previously. The docking of the neck-linker relies upon residues conserved only in the Eg5 subfamily of kinesin motors. Based on this new information, we suggest that the neck-linker of Eg5 may undergo an ordered-to-ordered transition during force production. This ratchet-like mechanism is consistent with the biological activity of Eg5.


  • Organizational Affiliation

    Department of Biochemistry and Biophysics, University of California, San Francisco, California 94143, USA. turner@msg.ucsf.edu


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
KINESIN-RELATED MOTOR PROTEIN Eg5
A, B
368Homo sapiensMutation(s): 0 
Gene Names: Eg5
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
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.218 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.083α = 90
b = 78.588β = 93.84
c = 94.147γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-07-18
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-07
    Changes: Data collection, Database references, Derived calculations
  • Version 1.4: 2024-04-03
    Changes: Refinement description