Experimental Data Snapshot

  • Resolution: 1.80 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.216 

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This is version 1.3 of the entry. See complete history


Crystal structure of the kinesin motor domain reveals a structural similarity to myosin.

Kull, F.J.Sablin, E.P.Lau, R.Fletterick, R.J.Vale, R.D.

(1996) Nature 380: 550-555

  • DOI: https://doi.org/10.1038/380550a0
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Kinesin is the founding member of a superfamily of microtubule based motor proteins that perform force-generating tasks such as organelle transport and chromosome segregation. It has two identical approximately 960-amino-acid chains containing an amino-terminal globular motor domain, a central alpha-helical region that enables dimer formation through a coiled-coil, and a carboxy-terminal tail domain that binds light chains and possibly an organelle receptor. The kinesin motor domain of approximately 340 amino acids, which can produce movement in vitro, is much smaller than that of myosin (approximately 850 amino acids) and dynein (1,000 amino acids), and is the smallest known molecular motor. Here, we report the crystal structure of the human kinesin motor domain with bound ADP determined to 1.8-A resolution by X-ray crystallography. The motor consists primarily of a single alpha/beta arrowhead-shaped domain with dimensions of 70 x 45 x 45 A. Unexpectedly, it has a striking structural similarity to the core of the catalytic domain of the actin-based motor myosin. Although kinesin and myosin have virtually no amino-acid sequence++ identity, and exhibit distinct enzymatic and motile properties, our results suggest that these two classes of mechanochemical enzymes evolved from a common ancestor and share a similar force-generating strategy.

  • Organizational Affiliation

    Department of Biochemistry/Biophysics, University of California, San Francisco, California 94143, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
KINESIN325Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P33176 (Homo sapiens)
Explore P33176 
Go to UniProtKB:  P33176
PHAROS:  P33176
GTEx:  ENSG00000170759 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP33176
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.80 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.216 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 48.54α = 90
b = 67.94β = 90
c = 112.95γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-10-14
    Type: Initial release
  • Version 1.1: 2008-03-24
    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, Other