Biological Assembly 1  

 3D View: Structure | Electron Density

Standalone Viewers  
Protein Workshop | Ligand Explorer

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 28444.57 
• Atom Count: 2001 
• Residue Count: 243 
• Unique protein chains: 1

1MB8

Crystal Structure of the actin binding domain of plectin

• DOI: 10.2210/pdb1MB8/pdb

• Classification: STRUCTURAL PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2002-08-02 Released: 2003-06-10 
• Deposition Author(s): de Pereda, J.M.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Free: 0.261 
• R-Value Work: 0.212 

Literature

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

• PubMed: 12791251 


• 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.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Plectin	A	243	Homo sapiens	Mutation(s): 0  Gene Names: PLEC (PLEC1)
Find proteins for Q15149 (Homo sapiens) Go to Gene View: PLEC Go to UniProtKB:  Q15149

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• 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 = 33.597	α = 90.00
b = 79.283	β = 90.00
c = 82.370	γ = 90.00

Software Package:

Software Name	Purpose
CNS	phasing
CNS	refinement
SCALEPACK	data scaling
DENZO	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-08-02 
• Released Date: 2003-06-10 
• Deposition Author(s): de Pereda, J.M.

Revision History 

• Version 1.0: 2003-06-10
  Type: Initial release
• Version 1.1: 2008-04-28
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance