Macromolecule Content

• Total Structure Weight: 20.41 kDa 
• Atom Count: 1431 
• Modelled Residue Count: 191 
• Deposited Residue Count: 191 
• Unique protein chains: 1

2K7Q

Filamin A Ig-like domains 18-19

• DOI: 10.2210/pdb2K7Q/pdb
• BMRB: 15925

• Classification: STRUCTURAL PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2008-08-19 Released: 2009-07-07 
• Deposition Author(s): Heikkinen, O.K., Kilpelainen, I., Koskela, H., Permi, P., Heikkinen, S., Ylanne, J.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Atomic structures of two novel immunoglobulin-like domain pairs in the actin cross-linking protein filamin

Heikkinen, O.K., Ruskamo, S., Konarev, P.V., Svergun, D.I., Iivanainen, T., Heikkinen, S.M., Permi, P., Koskela, H., Kilpelainen, I., Ylanne, J.

(2009) J Biol Chem 284: 25450-25458

• PubMed: 19622754 
• DOI: 10.1074/jbc.M109.019661
• Primary Citation of Related Structures:  
  2K7Q, 2K7P


• PubMed Abstract: 
  

Filamins are actin filament cross-linking proteins composed of an N-terminal actin-binding domain and 24 immunoglobulin-like domains (IgFLNs). Filamins interact with numerous proteins, including the cytoplasmic domains of plasma membrane signaling and cell adhesion receptors. Thereby filamins mechanically and functionally link the cell membrane to the cytoskeleton. Most of the interactions have been mapped to the C-terminal IgFLNs 16-24. Similarly, as with the previously known compact domain pair of IgFLNa20-21, the two-domain fragments IgFLNa16-17 and IgFLNa18-19 were more compact in small angle x-ray scattering analysis than would be expected for two independent domains. Solution state NMR structures revealed that the domain packing in IgFLNa18-19 resembles the structure of IgFLNa20-21. In both domain pairs the integrin-binding site is masked, although the details of the domain-domain interaction are partly distinct. The structure of IgFLNa16-17 revealed a new domain packing mode where the adhesion receptor binding site of domain 17 is not masked. Sequence comparison suggests that similar packing of three tandem filamin domain pairs is present throughout the animal kingdom, and we propose that this packing is involved in the regulation of filamin interactions through a mechanosensor mechanism.

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Related Citations: 

• 1H,13C,15N chemical shift assignments for filamin A Ig-like domain pairs 16-17 and 18-19
  Heikkinen, O., Koskela, H., Permi, P., Heikkinen, S., Kilpelainen, I., Ylanne, J.
  () To be published --: --

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Organizational Affiliation: 

Department of Chemistry, University of Helsinki, FI-00014 Helsinki, Finland.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Filamin-A	A	191	Homo sapiens	Mutation(s): 0  Gene Names: FLNA, FLN, FLN1
UniProt & NIH Common Fund Data Resources
Find proteins for P21333 (Homo sapiens) Explore P21333  Go to UniProtKB:  P21333
PHAROS:  P21333 GTEx:  ENSG00000196924

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2K7Q Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-08-19 
• Released Date: 2009-07-07 
Deposition Author(s): Heikkinen, O.K., Kilpelainen, I., Koskela, H., Permi, P., Heikkinen, S., Ylanne, J.

Revision History  

• Version 1.0: 2009-07-07
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance