Crystal structure of KIF1A CC1-FHA tandem

Experimental Data Snapshot

  • Resolution: 2.51 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.252 
  • R-Value Observed: 0.253 

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The CC1-FHA Tandem as a Central Hub for Controlling the Dimerization and Activation of Kinesin-3 KIF1A

Huo, L.Yue, Y.Ren, J.Yu, J.Liu, J.Yu, Y.Ye, F.Xu, T.Zhang, M.Feng, W.

(2012) Structure 20: 1550-1561

  • DOI: https://doi.org/10.1016/j.str.2012.07.002
  • Primary Citation of Related Structures:  
    4EGX, 4EJQ

  • PubMed Abstract: 

    Kinesin-3 KIF1A plays prominent roles in axonal transport and synaptogenesis. KIF1A adopts a monomeric form in vitro but acts as a processive dimer in vivo. The mechanism underlying the motor dimerization is poorly understood. Here, we find that the CC1-FHA tandem of KIF1A exists as a stable dimer. The structure of CC1-FHA reveals that the linker between CC1 and FHA unexpectedly forms a β-finger hairpin, which integrates CC1 with FHA assembling a CC1-FHA homodimer. More importantly, dissociation of the CC1-FHA dimer unleashes CC1 and the β-finger, which are both essential for the motor inhibition. Thus, dimerization of the CC1-FHA tandem not only promotes the KIF1A dimer formation but also may trigger the motor activity via sequestering the CC1/β-finger region. The CC1-FHA tandem likely functions as a hub for controlling the dimerization and activation of KIF1A, which may represent a new paradigm for the kinesin regulation shared by other kinesin-3 motors.

  • Organizational Affiliation

    National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Beijing 100101, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Kinesin-like protein KIF1A
A, B, C, D
184Homo sapiensMutation(s): 0 
Gene Names: KIF1AATSVC2orf20
UniProt & NIH Common Fund Data Resources
Find proteins for Q12756 (Homo sapiens)
Explore Q12756 
Go to UniProtKB:  Q12756
PHAROS:  Q12756
GTEx:  ENSG00000130294 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ12756
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.51 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.252 
  • R-Value Observed: 0.253 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.943α = 90
b = 87.855β = 90
c = 101.694γ = 90
Software Package:
Software NamePurpose
HKL-2000data 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: 2012-10-03
    Type: Initial release
  • Version 1.1: 2023-11-08
    Changes: Data collection, Database references, Derived calculations, Refinement description