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: 2.10 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.197 

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
  • Primary Citation of Related Structures:  
    2BRQ

  • 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 signaling proteins to the cytoskeleton ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
FILAMIN AA, B97Homo sapiensMutation(s): 0 
Gene Names: FLNAFLNFLN1
Find proteins for P21333 (Homo sapiens)
Explore P21333 
Go to UniProtKB:  P21333
NIH Common Fund Data Resources
PHAROS:  P21333
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
INTEGRIN BETA-7 SUBUNITC, D31Homo sapiensMutation(s): 0 
Gene Names: ITGB7
Find proteins for P26010 (Homo sapiens)
Explore P26010 
Go to UniProtKB:  P26010
NIH Common Fund Data Resources
PHAROS:  P26010
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GSH
Query on GSH

Download Ideal Coordinates CCD File 
E [auth A], H [auth B]GLUTATHIONE
C10 H17 N3 O6 S
RWSXRVCMGQZWBV-WDSKDSINSA-N
 Ligand Interaction
GOL
Query on GOL

Download Ideal Coordinates CCD File 
F [auth A], G [auth A]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.197 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.97α = 90
b = 60β = 110.17
c = 51.57γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

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