3LRE

Crystal Structure Analysis of Human Kinesin-8 Motor Domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.223 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Insight into the molecular mechanism of the multitasking kinesin-8 motor.

Peters, C.Brejc, K.Belmont, L.Bodey, A.J.Lee, Y.Yu, M.Guo, J.Sakowicz, R.Hartman, J.Moores, C.A.

(2010) EMBO J 29: 3437-3447

  • DOI: https://doi.org/10.1038/emboj.2010.220
  • Primary Citation of Related Structures:  
    3LRE

  • PubMed Abstract: 

    Members of the kinesin-8 motor class have the remarkable ability to both walk towards microtubule plus-ends and depolymerise these ends on arrival, thereby regulating microtubule length. To analyse how kinesin-8 multitasks, we studied the structure and function of the kinesin-8 motor domain. We determined the first crystal structure of a kinesin-8 and used cryo-electron microscopy to calculate the structure of the microtubule-bound motor. Microtubule-bound kinesin-8 reveals a new conformation compared with the crystal structure, including a bent conformation of the α4 relay helix and ordering of functionally important loops. The kinesin-8 motor domain does not depolymerise stabilised microtubules with ATP but does form tubulin rings in the presence of a non-hydrolysable ATP analogue. This shows that, by collaborating, kinesin-8 motor domain molecules can release tubulin from microtubules, and that they have a similar mechanical effect on microtubule ends as kinesin-13, which enables depolymerisation. Our data reveal aspects of the molecular mechanism of kinesin-8 motors that contribute to their unique dual motile and depolymerising functions, which are adapted to control microtubule length.


  • Organizational Affiliation

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


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Kinesin-like protein KIF18A
A, B
355Homo sapiensMutation(s): 0 
Gene Names: KIF18AOK/SW-cl.108
UniProt & NIH Common Fund Data Resources
Find proteins for Q8NI77 (Homo sapiens)
Explore Q8NI77 
Go to UniProtKB:  Q8NI77
PHAROS:  Q8NI77
GTEx:  ENSG00000121621 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8NI77
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.223 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.42α = 90
b = 79.744β = 90
c = 140.145γ = 90
Software Package:
Software NamePurpose
SAINTdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
PROTEUM PLUSdata collection
PROTEUM PLUSdata reduction
LSCALEdata scaling
MOLREPphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-11-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description
  • Version 1.3: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description