4Z68

Hybrid structural analysis of the Arp2/3 regulator Arpin identifies its acidic tail as a primary binding epitope


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.86 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.174 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Hybrid Structural Analysis of the Arp2/3 Regulator Arpin Identifies Its Acidic Tail as a Primary Binding Epitope.

Fetics, S.Thureau, A.Campanacci, V.Aumont-Nicaise, M.Dang, I.Gautreau, A.Perez, J.Cherfils, J.

(2016) Structure 24: 252-260

  • DOI: https://doi.org/10.1016/j.str.2015.12.001
  • Primary Citation of Related Structures:  
    4Z68

  • PubMed Abstract: 

    Arpin is a newly discovered regulator of actin polymerization at the cell leading edge, which steers cell migration by exerting a negative control on the Arp2/3 complex. Arpin proteins have an acidic tail homologous to the acidic motif of the VCA domain of nucleation-promoting factors (NPFs). This tail is predicted to compete with the VCA of NPFs for binding to the Arp2/3 complex, thereby mitigating activation and/or tethering of the complex to sites of actin branching. Here, we investigated the structure of full-length Arpin using synchrotron small-angle X-ray scattering, and of its acidic tail in complex with an ankyrin repeats domain using X-ray crystallography. The data were combined in a hybrid model in which the acidic tail extends from the globular core as a linear peptide and forms a primary epitope that is readily accessible in unbound Arpin and suffices to tether Arpin to interacting proteins with high affinity.


  • Organizational Affiliation

    Laboratoire de Pharmacologie et Biologie Appliquée, UMR 8113, CNRS-Ecole Normale Supérieure de Cachan, 61 Avenue du Président Wilson, 94235 Cachan Cedex, France; Laboratoire d'Enzymologie et Biochimie Structurales, CNRS UPR3082, 91190 Gif-sur-Yvette, France.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tankyrase-2155Homo sapiensMutation(s): 0 
Gene Names: TNKS2PARP5BTANK2TNKL
EC: 2.4.2.30
UniProt & NIH Common Fund Data Resources
Find proteins for Q9H2K2 (Homo sapiens)
Explore Q9H2K2 
Go to UniProtKB:  Q9H2K2
PHAROS:  Q9H2K2
GTEx:  ENSG00000107854 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9H2K2
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
GLU-ILE-ARG-GLU-GLN-GLY-ASP-GLY-ALA-GLU-ASP-GLUB [auth E]12Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q7Z6K5 (Homo sapiens)
Explore Q7Z6K5 
Go to UniProtKB:  Q7Z6K5
PHAROS:  Q7Z6K5
GTEx:  ENSG00000242498 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ7Z6K5
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.86 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.170 
  • R-Value Observed: 0.174 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 29.543α = 90
b = 43.806β = 90
c = 107.637γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
French National Research AgencyFrance--

Revision History  (Full details and data files)

  • Version 1.0: 2015-12-30
    Type: Initial release
  • Version 1.1: 2016-01-27
    Changes: Database references
  • Version 1.2: 2016-02-10
    Changes: Database references
  • Version 1.3: 2017-09-06
    Changes: Author supporting evidence
  • Version 1.4: 2024-01-10
    Changes: Data collection, Database references, Refinement description