6IXW

pCBH ParM non-polymerisable quadruple mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.161 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

The structure of a 15-stranded actin-like filament from Clostridium botulinum.

Koh, F.Narita, A.Lee, L.J.Tanaka, K.Tan, Y.Z.Dandey, V.P.Popp, D.Robinson, R.C.

(2019) Nat Commun 10: 2856-2856

  • DOI: https://doi.org/10.1038/s41467-019-10779-9
  • Primary Citation of Related Structures:  
    6IXW, 6IZR, 6IZV

  • PubMed Abstract: 

    Microfilaments (actin) and microtubules represent the extremes in eukaryotic cytoskeleton cross-sectional dimensions, raising the question of whether filament architectures are limited by protein fold. Here, we report the cryoelectron microscopy structure of a complex filament formed from 15 protofilaments of an actin-like protein. This actin-like ParM is encoded on the large pCBH Clostridium botulinum plasmid. In cross-section, the ~26 nm diameter filament comprises a central helical protofilament surrounded by intermediate and outer layers of six and eight twisted protofilaments, respectively. Alternating polarity of the layers allows for similar lateral contacts between each layer. This filament design is stiffer than the actin filament, and has likely been selected for during evolution to move large cargos. The comparable sizes of microtubule and pCBH ParM filaments indicate that larger filament architectures are not limited by the protomer fold. Instead, function appears to have been the evolutionary driving force to produce broad, complex filaments.


  • Organizational Affiliation

    Institute of Molecular and Cell Biology, A*STAR (Agency for Science, Technology and Research), Biopolis, Singapore, 138673, Singapore.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
pCBH ParMA [auth C],
B,
C [auth A]
352Clostridium botulinum Prevot_594Mutation(s): 4 
Gene Names: T258_3831
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.161 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 164.153α = 90
b = 93.922β = 131.55
c = 114.699γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-06-19
    Type: Initial release
  • Version 1.1: 2019-07-10
    Changes: Data collection, Database references
  • Version 1.2: 2024-03-27
    Changes: Data collection, Database references, Derived calculations