Biological Assembly 1  

 3D View: Structure

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - AB 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 15095.87 
• Atom Count: 1064 
• Residue Count: 143 
• Unique protein chains: 2

2K9U

Solution NMR structure of the Filamin-migfilin complex

• DOI: 10.2210/pdb2K9U/pdb
• BMRB: 16002

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


• Deposited: 2008-10-24 Released: 2008-12-23 
• Deposition Author(s): Ithychanda, S.N., Qin, J.

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Experimental Data Snapshot

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

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

• PubMed: 19074766 
• DOI: 10.1074/jbc.M807719200


• 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. 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.

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Organizational Affiliation: 

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

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Gamma filamin	A	119	Homo sapiens	Mutation(s): 0  Gene Names: FLNC (ABPL, FLN2)
Find proteins for Q14315 (Homo sapiens) Go to Gene View: FLNC Go to UniProtKB:  Q14315

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Filamin-binding LIM protein 1	B	24	Homo sapiens	Mutation(s): 0  Gene Names: FBLIM1 (FBLP1)
Find proteins for Q8WUP2 (Homo sapiens) Go to Gene View: FBLIM1 Go to UniProtKB:  Q8WUP2

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

Entry History 

Deposition Data

• Deposited Date: 2008-10-24 
• Released Date: 2008-12-23 
• Deposition Author(s): Ithychanda, S.N., Qin, J.

Revision History 

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