4PXT

Structural basis for the assembly of the mitotic motor kinesin-5 into bipolar tetramers


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.242 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural basis for the assembly of the mitotic motor Kinesin-5 into bipolar tetramers.

Scholey, J.E.Nithianantham, S.Scholey, J.M.Al-Bassam, J.

(2014) Elife 3: e02217-e02217

  • DOI: 10.7554/eLife.02217
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Chromosome segregation during mitosis depends upon Kinesin-5 motors, which display a conserved, bipolar homotetrameric organization consisting of two motor dimers at opposite ends of a central rod. Kinesin-5 motors crosslink adjacent microtubules to ...

    Chromosome segregation during mitosis depends upon Kinesin-5 motors, which display a conserved, bipolar homotetrameric organization consisting of two motor dimers at opposite ends of a central rod. Kinesin-5 motors crosslink adjacent microtubules to drive or constrain their sliding apart, but the structural basis of their organization is unknown. In this study, we report the atomic structure of the bipolar assembly (BASS) domain that directs four Kinesin-5 subunits to form a bipolar minifilament. BASS is a novel 26-nm four-helix bundle, consisting of two anti-parallel coiled-coils at its center, stabilized by alternating hydrophobic and ionic four-helical interfaces, which based on mutagenesis experiments, are critical for tetramerization. Strikingly, N-terminal BASS helices bend as they emerge from the central bundle, swapping partner helices, to form dimeric parallel coiled-coils at both ends, which are offset by 90°. We propose that BASS is a mechanically stable, plectonemically-coiled junction, transmitting forces between Kinesin-5 motor dimers during microtubule sliding. DOI: http://dx.doi.org/10.7554/eLife.02217.001.


    Organizational Affiliation

    Department of Molecular and Cellular Biology, University of California, Davis, Davis, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Bipolar kinesin KRP-130
A, B
211Drosophila melanogasterMutation(s): 2 
Gene Names: Klp61F (KLP2)
Find proteins for P46863 (Drosophila melanogaster)
Go to UniProtKB:  P46863
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.242 
  • Space Group: P 64 2 2
Unit Cell:
Length (Å)Angle (°)
a = 139.070α = 90.00
b = 139.070β = 90.00
c = 104.350γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
SHELXSphasing
MAR345dtbdata collection
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-04-23
    Type: Initial release