6D8C

Cryo-EM structure of FLNaABD E254K bound to phalloidin-stabilized F-actin


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.54 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis of the filamin A actin-binding domain interaction with F-actin.

Iwamoto, D.V.Huehn, A.Simon, B.Huet-Calderwood, C.Baldassarre, M.Sindelar, C.V.Calderwood, D.A.

(2018) Nat. Struct. Mol. Biol. 25: 918-927

  • DOI: 10.1038/s41594-018-0128-3

  • PubMed Abstract: 
  • Actin-cross-linking proteins assemble actin filaments into higher-order structures essential for orchestrating cell shape, adhesion, and motility. Missense mutations in the tandem calponin homology domains of their actin-binding domains (ABDs) underl ...

    Actin-cross-linking proteins assemble actin filaments into higher-order structures essential for orchestrating cell shape, adhesion, and motility. Missense mutations in the tandem calponin homology domains of their actin-binding domains (ABDs) underlie numerous genetic diseases, but a molecular understanding of these pathologies is hampered by the lack of high-resolution structures of any actin-cross-linking protein bound to F-actin. Here, taking advantage of a high-affinity, disease-associated mutant of the human filamin A (FLNa) ABD, we combine cryo-electron microscopy and functional studies to reveal at near-atomic resolution how the first calponin homology domain (CH1) and residues immediately N-terminal to it engage actin. We further show that reorientation of CH2 relative to CH1 is required to avoid clashes with actin and to expose F-actin-binding residues on CH1. Our data explain localization of disease-associated loss-of-function mutations to FLNaCH1 and gain-of-function mutations to the regulatory FLNaCH2. Sequence conservation argues that this provides a general model for ABD-F-actin binding.


    Organizational Affiliation

    Department of Pharmacology, Yale University, New Haven, CT, USA. david.calderwood@yale.edu.,Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, USA.,Institute of Medical Sciences, University of Aberdeen, Aberdeen, Scotland, UK.,Department of Pharmacology, Yale University, New Haven, CT, USA.,Department of Cell Biology, Yale University, New Haven, CT, USA. david.calderwood@yale.edu.,Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, USA. charles.sindelar@yale.edu.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Filamin-A
D, A, B, C, E
306Homo sapiensMutation(s): 1 
Gene Names: FLNA (FLN, FLN1)
Find proteins for P21333 (Homo sapiens)
Go to Gene View: FLNA
Go to UniProtKB:  P21333
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Actin, alpha skeletal muscle
H, J, K, L, M
375Gallus gallusMutation(s): 0 
Gene Names: ACTA1 (ACTA)
Find proteins for P68139 (Gallus gallus)
Go to Gene View: ACTA1
Go to UniProtKB:  P68139
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Phalloidin
N, O, P
7Amanita phalloidesMutation(s): 0 
Find proteins for P0CU65 (Amanita phalloides)
Go to UniProtKB:  P0CU65
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download SDF File 
Download CCD File 
H, J, K, L, M
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
H, J, K, L, M
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_002307
Query on PRD_002307
N,O,PPhalloidinCyclic peptide / Toxin

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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.54 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-09-19
    Type: Initial release
  • Version 1.1: 2018-10-03
    Type: Data collection, Database references
  • Version 1.2: 2018-10-17
    Type: Data collection, Database references