Crystal Structure of the ARF5 oligomerization domain

Experimental Data Snapshot

  • Resolution: 2.85 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 

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Structural Basis for Oligomerisation of Auxin Transcriptional Regulators

Nanao, M.H.Vinos-Poyo, T.Brunoud, G.Thevenon, E.Mazzoleni, M.Mast, D.Laine, S.Wang, S.Hagen, G.Li, H.Guilfoyle, T.J.Parcy, F.Vernoux, T.Dumas, R.

(2014) Nat Commun 5: 3617

  • DOI: https://doi.org/10.1038/ncomms4617
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The plant hormone auxin is a key morphogenetic regulator acting from embryogenesis onwards. Transcriptional events in response to auxin are mediated by the auxin response factor (ARF) transcription factors and the Aux/IAA (IAA) transcriptional repressors. At low auxin concentrations, IAA repressors associate with ARF proteins and recruit corepressors that prevent auxin-induced gene expression. At higher auxin concentrations, IAAs are degraded and ARFs become free to regulate auxin-responsive genes. The interaction between ARFs and IAAs is thus central to auxin signalling and occurs through the highly conserved domain III/IV present in both types of proteins. Here, we report the crystal structure of ARF5 domain III/IV and reveal the molecular determinants of ARF-IAA interactions. We further provide evidence that ARFs have the potential to oligomerize, a property that could be important for gene regulation in response to auxin.

  • Organizational Affiliation

    1] European Molecular Biology Laboratory, 6 rue Jules Horowitz, BP 181, Grenoble 38042, France [2] Unit of Virus Host-Cell Interactions, UJF-EMBL-CNRS, UMI 3265, 6 rue Jules Horowitz, Grenoble Cedex 9 38042, France.

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D, E
A, B, C, D, E, F, G, H
127Arabidopsis thalianaMutation(s): 0 
Find proteins for P93024 (Arabidopsis thaliana)
Explore P93024 
Go to UniProtKB:  P93024
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP93024
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.85 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 196.264α = 90
b = 86.438β = 112.71
c = 91.371γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-04-16
    Type: Initial release
  • Version 1.1: 2024-05-08
    Changes: Data collection, Database references, Other