2QU4

Model for Bacterial ParM Filament

• PDB DOI: https://doi.org/10.2210/pdb2QU4/pdb

• Classification: STRUCTURAL PROTEIN
• Organism(s): Escherichia coli
• Mutation(s): No 


• Deposited: 2007-08-03 Released: 2007-09-18 
• Deposition Author(s): Orlova, A., Garner, E.C., Galkin, V.E., Heuser, J., Mullins, R.D., Egelman, E.H.

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 16.0 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Literature

The structure of bacterial ParM filaments.

Orlova, A., Garner, E.C., Galkin, V.E., Heuser, J., Mullins, R.D., Egelman, E.H.

(2007) Nat Struct Mol Biol 14: 921-926

• PubMed: 17873883 
• DOI: https://doi.org/10.1038/nsmb1300
• Primary Citation of Related Structures:  
  2QU4


• PubMed Abstract: 
  

  Bacterial ParM is a homolog of eukaryotic actin and is involved in moving plasmids so that they segregate properly during cell division. Using cryo-EM and three-dimensional reconstruction, we show that ParM filaments have a different structure from F-actin, with very different subunit-subunit interfaces. These interfaces result in the helical handedness of the ParM filament being opposite to that of F-actin. Like F-actin, ParM filaments have a variable twist, and we show that this involves domain-domain rotations within the ParM subunit. The present results yield new insights into polymorphisms within F-actin, as well as the evolution of polymer families.

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Organizational Affiliation: 

Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, Virginia 22908-0733, USA.

Biological Assembly 1  

Global Symmetry: Helical - H  (Explore in 3D)
Global Stoichiometry: Homo 10-mer - A10 

Biological assembly 1 assigned by authors and generated by (software)

Macromolecule Content

• Total Structure Weight: 35.8 kDa 
• Atom Count: 2,517 
• Modelled Residue Count: 320 
• Deposited Residue Count: 320 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Plasmid segregation protein parM	A	320	Escherichia coli	Mutation(s): 0
UniProt
Find proteins for P11904 (Escherichia coli) Explore P11904  Go to UniProtKB:  P11904

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 16.0 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-09-18 
Deposition Author(s): Orlova, A., Garner, E.C., Galkin, V.E., Heuser, J., Mullins, R.D., Egelman, E.H.

Revision History  

• Version 1.0: 2007-09-18
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2024-02-21
  Changes: Author supporting evidence, Data collection, Database references, Derived calculations, Refinement description