1WM4

Solution structure of mouse coactosin, an actin filament binding protein

• PDB DOI: https://doi.org/10.2210/pdb1WM4/pdb
• BMRB: 6032

• Classification: PROTEIN BINDING
• Organism(s): Mus musculus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2004-07-03 Released: 2004-11-02 
• Deposition Author(s): Hellman, M., Paavilainen, V.O., Naumanen, P., Lappalainen, P., Annila, A., Permi, P.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 15 
• Selection Criteria: structures with the lowest energy 

Literature

Solution structure of coactosin reveals structural homology to ADF/cofilin family proteins

Hellman, M., Paavilainen, V.O., Naumanen, P., Lappalainen, P., Annila, A., Permi, P.

(2004) FEBS Lett 576: 91-96

• PubMed: 15474017 
• DOI: https://doi.org/10.1016/j.febslet.2004.08.068
• Primary Citation of Related Structures:  
  1WM4


• PubMed Abstract: 
  

  Coactosin is a small (MW approximately 15 kDa) evolutionarily conserved actin filament binding protein. It displays remote sequence homology to ADF/cofilin proteins and to the ADF-H domains of twinfilin and Abp1/drebrin. However, biochemical analyses have demonstrated that coactosin has a very different role in actin dynamics from the ones of ADF/cofilin, twinfilin or Abp1/drebrin. To elucidate the molecular mechanism of coactosin/actin interaction, we determined the three-dimensional structure of mouse coactosin by multidimensional NMR spectroscopy. We find that the coactosin structure is homologous to ADF/cofilin and to the ADF-H domains of twinfilin. Furthermore, the regions that have been shown to be important for actin filament interactions in ADF/cofilins are structurally conserved in coactosin suggesting that these two proteins interact with F-actin through a conserved interface. Our analysis also identifies key structural differences between these proteins that may account for the differences in biochemical activities and cellular roles of these proteins.

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Organizational Affiliation: 

Program in Structural Biology and Biophysics, Institute of Biotechnology, University of Helsinki, Finland.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 15.96 kDa 
• Atom Count: 1,123 
• Modelled Residue Count: 142 
• Deposited Residue Count: 142 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Coactosin-like protein	A	142	Mus musculus	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for Q9CQI6 (Mus musculus) Explore Q9CQI6  Go to UniProtKB:  Q9CQI6
IMPC:  MGI:1919292

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 15 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-11-02 
Deposition Author(s): Hellman, M., Paavilainen, V.O., Naumanen, P., Lappalainen, P., Annila, A., Permi, P.

Revision History  

• Version 1.0: 2004-11-02
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-03-02
  Changes: Database references, Derived calculations