3U06

Crystal structure of the kinesin-14 NcdG347D

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.217 

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Literature

Neck-motor interactions trigger rotation of the kinesin stalk.

Liu, H.L., Pemble Iv, C.W., Endow, S.A.

(2012) Sci Rep 2: 236-236

  • DOI: 10.1038/srep00236
  • Primary Citation of Related Structures:  
    3U06

  • PubMed Abstract: 

    • Rotation of the coiled-coil stalk of the kinesin-14 motors is thought to drive displacements or steps by the motor along microtubules, but the structural changes that trigger stalk rotation and the nucleotide state in which it occurs are not certain. Here we report a kinesin-14 neck mutant that releases ADP more slowly than wild type and shows weaker microtubule affinity, consistent with defective stalk rotation ...

    Rotation of the coiled-coil stalk of the kinesin-14 motors is thought to drive displacements or steps by the motor along microtubules, but the structural changes that trigger stalk rotation and the nucleotide state in which it occurs are not certain. Here we report a kinesin-14 neck mutant that releases ADP more slowly than wild type and shows weaker microtubule affinity, consistent with defective stalk rotation. Unexpectedly, crystal structures show the stalk fully rotated - neck-motor interactions destabilize the stalk, causing it to rotate and ADP to be released, and alter motor affinity for microtubules. A new structural pathway accounts for the coupling of stalk rotation - the force-producing stroke - to changes in motor affinity for nucleotide and microtubules. Sequential disruption of salt bridges that stabilize the unrotated stalk could cause the stalk to initiate and complete rotation in different nucleotide states.

    Organizational Affiliation: 

    Department of Cell Biology, Duke University Medical Center, Durham, NC 27710 USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein claret segregationalA, B412Drosophila melanogasterMutation(s): 1 
Gene Names: CA(ND), CG7831, ncd, non-claret disjunctional
UniProt
Find proteins for P20480 (Drosophila melanogaster)
Explore P20480 
Go to UniProtKB:  P20480
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP20480
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.217 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 160.539α = 90
b = 67.094β = 98.91
c = 94.369γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
SERGUIdata collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-03-07
    Type: Initial release
  • Version 1.1: 2014-11-12
    Changes: Structure summary
  • Version 1.2: 2017-11-08
    Changes: Refinement description