2VCP

Crystal structure of N-Wasp VC domain in complex with skeletal actin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.331 
  • R-Value Work: 0.275 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Interactions of Isolated C-Terminal Fragments of Neural Wiskott-Aldrich Syndrome Protein (N-Wasp) with Actin and Arp2/3 Complex.

Gaucher, J.F.Mauge, C.Didry, D.Guichard, B.Renault, L.Carlier, M.F.

(2012) J.Biol.Chem. 287: 34646

  • DOI: 10.1074/jbc.M112.394361

  • PubMed Abstract: 
  • Wiskott-Aldrich syndrome proteins (WASP) are a family of proteins that all catalyze actin filament branching with the Arp2/3 complex in a variety of actin-based motile processes. The constitutively active C-terminal domain, called VCA, harbors one or ...

    Wiskott-Aldrich syndrome proteins (WASP) are a family of proteins that all catalyze actin filament branching with the Arp2/3 complex in a variety of actin-based motile processes. The constitutively active C-terminal domain, called VCA, harbors one or more WASP homology 2 (WH2) domains that bind G-actin, whereas the CA extension binds the Arp2/3 complex. The VCA·actin·Arp2/3 entity associates with a mother filament to form a branched junction from which a daughter filament is initiated. The number and function of WH2-bound actin(s) in the branching process are not known, and the stoichiometry of the VCA·actin·Arp2/3 complex is debated. We have expressed the tandem WH2 repeats of N-WASP, either alone (V) or associated with the C (VC) and CA (VCA) extensions. We analyzed the structure of actin in complex with V, VC, and VCA using protein crystallography and hydrodynamic and spectrofluorimetric methods. The partial crystal structure of the VC·actin 1:1 complex shows two actins in the asymmetric unit with extensive actin-actin contacts. In solution, each of the two WH2 domains in V, VC, and VCA binds G-actin in 1:2 complexes that participate in barbed end assembly. V, VC, and VCA enhance barbed end depolymerization like profilin but neither nucleate nor sever filaments, in contrast with other WH2 repeats. VCA binds the Arp2/3 complex in a 1:1 complex even in the presence of a large excess of VCA. VCA·Arp2/3 binds one actin in a latrunculin A-sensitive fashion, in a 1:1:1 complex, indicating that binding of the second actin to VCA is weakened in the ternary complex.


    Organizational Affiliation

    Laboratoire de Cristallographie et RMN Biologiques CNRS UMR 8015, Faculté de Pharmacie, Université Paris Descartes, Sorbonne Paris Cité, 4 avenue de l'Observatoire, 75006 Paris, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ACTIN, ALPHA SKELETAL MUSCLE
A, B
375Oryctolagus cuniculusGene Names: ACTA1 (ACTA)
Find proteins for P68135 (Oryctolagus cuniculus)
Go to Gene View: ACTA1
Go to UniProtKB:  P68135
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
NEURAL WISKOTT-ALDRICH SYNDROME PROTEIN
D, E
93Homo sapiensGene Names: WASL
Find proteins for O00401 (Homo sapiens)
Go to Gene View: WASL
Go to UniProtKB:  O00401
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATP
Query on ATP

Download SDF File 
Download CCD File 
A, B
ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
HIC
Query on HIC
A, B
L-PEPTIDE LINKINGC7 H11 N3 O2HIS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.331 
  • R-Value Work: 0.275 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 136.240α = 90.00
b = 136.240β = 90.00
c = 205.410γ = 120.00
Software Package:
Software NamePurpose
CNSrefinement
SCALAdata scaling
AMoREphasing
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-11-04
    Type: Initial release
  • Version 1.1: 2012-08-08
    Type: Database references, Derived calculations, Other, Refinement description, Source and taxonomy, Structure summary, Version format compliance
  • Version 1.2: 2013-01-30
    Type: Database references