2K9U

Solution NMR structure of the Filamin-migfilin complex

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

Migfilin, a molecular switch in regulation of integrin activation.

Ithychanda, S.S., Das, M., Ma, Y.Q., Ding, K., Wang, X., Gupta, S., Wu, C., Plow, E.F., Qin, J.

(2009) J Biol Chem 284: 4713-4722

  • DOI: 10.1074/jbc.M807719200
  • Primary Citation of Related Structures:  
    2K9U

  • PubMed Abstract: 

    • The linkage of heterodimeric (alpha/beta) integrin receptors with their extracellular matrix ligands and intracellular actin cytoskeleton is a fundamental step for controlling cell adhesion and migration. Binding of the actin-linking protein, talin, to integrin beta cytoplasmic tails (CTs) induces high affinity ligand binding (integrin activation), whereas binding of another actin-linking protein, filamin, to the integrin beta CTs negatively regulates this process by blocking the talin-integrin interaction ...

    The linkage of heterodimeric (alpha/beta) integrin receptors with their extracellular matrix ligands and intracellular actin cytoskeleton is a fundamental step for controlling cell adhesion and migration. Binding of the actin-linking protein, talin, to integrin beta cytoplasmic tails (CTs) induces high affinity ligand binding (integrin activation), whereas binding of another actin-linking protein, filamin, to the integrin beta CTs negatively regulates this process by blocking the talin-integrin interaction. Here we show structurally that migfilin, a novel cytoskeletal adaptor highly enriched in the integrin adhesion sites, strongly interacts with the same region in filamin where integrin beta CTs bind. We further demonstrate that the migfilin interaction dissociates filamin from integrin and promotes the talin/integrin binding and integrin activation. Migfilin thus acts as a molecular switch to disconnect filamin from integrin for regulating integrin activation and dynamics of extracellular matrix-actin linkage.

    Organizational Affiliation: 

    Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio 44195, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma filaminA119Homo sapiensMutation(s): 0 
Gene Names: FLNC, ABPL, FLN2
UniProt & NIH Common Fund Data Resources
Find proteins for Q14315 (Homo sapiens)
Explore Q14315 
Go to UniProtKB:  Q14315
PHAROS:  Q14315
GTEx:  ENSG00000128591 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ14315
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Filamin-binding LIM protein 1B24N/AMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q8WUP2 (Homo sapiens)
Explore Q8WUP2 
Go to UniProtKB:  Q8WUP2
PHAROS:  Q8WUP2
GTEx:  ENSG00000162458 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8WUP2
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 2K9U Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-12-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2014-09-03
    Changes: Database references