2BRQ

Crystal structure of the filamin A repeat 21 complexed with the integrin beta7 cytoplasmic tail peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Molecular Basis of Filamin Binding to Integrins and Competition with Talin.

Kiema, T.Lad, Y.Jiang, P.Oxley, C.L.Baldassarre, M.Wegener, K.L.Campbell, I.D.Ylanne, J.Calderwood, D.A.

(2006) Mol.Cell 21: 337

  • DOI: 10.1016/j.molcel.2006.01.011

  • PubMed Abstract: 
  • The ability of adhesion receptors to transmit biochemical signals and mechanical force across cell membranes depends on interactions with the actin cytoskeleton. Filamins are large, actin-crosslinking proteins that connect multiple transmembrane and ...

    The ability of adhesion receptors to transmit biochemical signals and mechanical force across cell membranes depends on interactions with the actin cytoskeleton. Filamins are large, actin-crosslinking proteins that connect multiple transmembrane and signaling proteins to the cytoskeleton. Here, we describe the high-resolution structure of an interface between filamin A and an integrin adhesion receptor. When bound, the integrin beta cytoplasmic tail forms an extended beta strand that interacts with beta strands C and D of the filamin immunoglobulin-like domain (IgFLN) 21. This interface is common to many integrins, and we suggest it is a prototype for other IgFLN domain interactions. Notably, the structurally defined filamin binding site overlaps with that of the integrin-regulator talin, and these proteins compete for binding to integrin tails, allowing integrin-filamin interactions to impact talin-dependent integrin activation. Phosphothreonine-mimicking mutations inhibit filamin, but not talin, binding, indicating that kinases may modulate this competition and provide additional means to control integrin functions.


    Organizational Affiliation

    Biocenter Oulu, Department of Biochemistry, University of Oulu, FIN-90014 Oulu, Finland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FILAMIN A
A, B
97Homo sapiensMutation(s): 0 
Gene Names: FLNA (FLN, FLN1)
Find proteins for P21333 (Homo sapiens)
Go to Gene View: FLNA
Go to UniProtKB:  P21333
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
INTEGRIN BETA-7 SUBUNIT
C, D
31Homo sapiensMutation(s): 0 
Gene Names: ITGB7
Find proteins for P26010 (Homo sapiens)
Go to Gene View: ITGB7
Go to UniProtKB:  P26010
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
GSH
Query on GSH

Download SDF File 
Download CCD File 
A, B
GLUTATHIONE
C10 H17 N3 O6 S
RWSXRVCMGQZWBV-WDSKDSINSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.192 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 41.970α = 90.00
b = 60.000β = 110.17
c = 51.570γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PHASERphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-02-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.2: 2012-02-29
    Type: Other