Crystal Structure of the actin binding domain of plectin

Experimental Data Snapshot

  • Resolution: 2.15 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.212 

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Structural and Functional Analysis of the Actin Binding Domain of Plectin Suggests Alternative Mechanisms for Binding to F-Actin and Integrin Beta4

Garcia-Alvarez, B.Bobkov, A.Sonnenberg, A.de Pereda, J.M.

(2003) Structure 11: 615-625

  • DOI: https://doi.org/10.1016/s0969-2126(03)00090-x
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Plectin is a widely expressed cytoskeletal linker. Here we report the crystal structure of the actin binding domain of plectin and show that this region is sufficient for interaction with F-actin or the cytoplasmic region of integrin alpha6beta4. The structure is formed by two calponin homology domains arranged in a closed conformation. We show that binding to F-actin induces a conformational change in plectin that is inhibited by an engineered interdomain disulfide bridge. A two-step induced fit mechanism involving binding and subsequent domain rearrangement is proposed. In contrast, interaction with integrin alpha6beta4 occurs in a closed conformation. Competitive binding of plectin to F-actin and integrin alpha6beta4 may rely on the observed alternative binding mechanisms and involve both allosteric and steric factors.

  • Organizational Affiliation

    Program on Cell Adhesion, The Burnham Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Plectin243Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q15149 (Homo sapiens)
Explore Q15149 
Go to UniProtKB:  Q15149
PHAROS:  Q15149
GTEx:  ENSG00000178209 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ15149
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.15 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.212 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 33.597α = 90
b = 79.283β = 90
c = 82.37γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-06-10
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references