Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.194 

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This is version 1.3 of the entry. See complete history


Prokaryotic origin of the actin cytoskeleton.

van den Ent, F.Amos, L.A.Lowe, J.

(2001) Nature 413: 39-44

  • DOI: https://doi.org/10.1038/35092500
  • Primary Citation of Related Structures:  
    1JCE, 1JCF, 1JCG

  • PubMed Abstract: 

    It was thought until recently that bacteria lack the actin or tubulin filament networks that organize eukaryotic cytoplasm. However, we show here that the bacterial MreB protein assembles into filaments with a subunit repeat similar to that of F-actin-the physiological polymer of eukaryotic actin. By elucidating the MreB crystal structure we demonstrate that MreB and actin are very similar in three dimensions. Moreover, the crystals contain protofilaments, allowing visualization of actin-like strands at atomic resolution. The structure of the MreB protofilament is in remarkably good agreement with the model for F-actin, showing that the proteins assemble in identical orientations. The actin-like properties of MreB explain the finding that MreB forms large fibrous spirals under the cell membrane of rod-shaped cells, where they are involved in cell-shape determination. Thus, prokaryotes are now known to possess homologues both of tubulin, namely FtsZ, and of actin.

  • Organizational Affiliation

    MRC Laboratory of Molecular Biology, Cambridge, UK. fent@mrc-lmb.cam.ac.uk

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ROD SHAPE-DETERMINING PROTEIN MREB344Thermotoga maritimaMutation(s): 0 
Gene Names: TM0588
Find proteins for Q9WZ57 (Thermotoga maritima (strain ATCC 43589 / DSM 3109 / JCM 10099 / NBRC 100826 / MSB8))
Explore Q9WZ57 
Go to UniProtKB:  Q9WZ57
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9WZ57
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.194 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.1α = 90
b = 51.1β = 90
c = 292.9γ = 120
Software Package:
Software NamePurpose
MOSFLMdata reduction
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-09-19
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-10-25
    Changes: Data collection, Database references, Refinement description