2BP3

Crystal structure of Filamin A domain 17 and GPIb alpha cytoplasmic domain complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.32 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The Structure of the Gpib-Filamin a Complex.

Nakamura, F.Pudas, R.Heikkinen, O.Permi, P.Kilpelainen, I.Munday, A.D.Hartwig, J.H.Stossel, T.P.Ylanne, J.

(2006) Blood 107: 1925

  • DOI: 10.1182/blood-2005-10-3964
  • Primary Citation of Related Structures:  
    2AAV, 2BP3

  • PubMed Abstract: 
  • Filamin A (FLNa), a dimeric actin cross-linking and scaffold protein with numerous intracellular binding partners, anchors the platelet adhesion glycoprotein (GP) Ib-IX-V receptor to actin cytoskeleton. We mapped the GPIbalpha binding site to a singl ...

    Filamin A (FLNa), a dimeric actin cross-linking and scaffold protein with numerous intracellular binding partners, anchors the platelet adhesion glycoprotein (GP) Ib-IX-V receptor to actin cytoskeleton. We mapped the GPIbalpha binding site to a single domain of FLNa and resolved the structure of this domain and its interaction complex with the corresponding GPIbalpha cytoplasmic domain. This is the first atomic structure of this class of membrane glycoprotein-cytoskeleton connection. GPIbalpha binds in a groove formed between the C and D beta strands of FLNa domain 17. The interaction is strikingly similar to that between the beta7 integrin tail and a different FLNa domain, potentially defining a conserved motif for FLNa binding. Nevertheless, the structures also reveal specificity of the interfaces, which explains different regulatory mechanisms. To verify the topology of GPIb-FLNa interaction we also purified the native complex from platelets and showed that GPIb interacts with the C-terminus of FLNa, which is in accordance with our biochemical and structural data.


    Organizational Affiliation

    Hematology Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
FILAMIN AAB97Homo 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
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PLATELET GLYCOPROTEIN IB ALPHA CHAINST22Homo sapiensMutation(s): 0 
Gene Names: GP1BA
Find proteins for P07359 (Homo sapiens)
Explore P07359 
Go to UniProtKB:  P07359
NIH Common Fund Data Resources
PHAROS  P07359
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download CCD File 
A, B
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.32 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.216 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.9α = 90
b = 62.8β = 90
c = 122.8γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2005-04-18 
  • Released Date: 2005-11-30 
  • Deposition Author(s): Pudas, R., Ylanne, J.

Revision History 

  • Version 1.0: 2005-11-30
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance