5NQS

Structure of the Arabidopsis Thaliana TOPLESS N-terminal domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.61 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of the Arabidopsis TOPLESS corepressor provides insight into the evolution of transcriptional repression.

Martin-Arevalillo, R.Nanao, M.H.Larrieu, A.Vinos-Poyo, T.Mast, D.Galvan-Ampudia, C.Brunoud, G.Vernoux, T.Dumas, R.Parcy, F.

(2017) Proc. Natl. Acad. Sci. U.S.A. 114: 8107-8112

  • DOI: 10.1073/pnas.1703054114
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Transcriptional repression involves a class of proteins called corepressors that link transcription factors to chromatin remodeling complexes. In plants such as Arabidopsis thaliana, the most prominent corepressor is TOPLESS (TPL), which plays a key ...

    Transcriptional repression involves a class of proteins called corepressors that link transcription factors to chromatin remodeling complexes. In plants such as Arabidopsis thaliana, the most prominent corepressor is TOPLESS (TPL), which plays a key role in hormone signaling and development. Here we present the crystallographic structure of the Arabidopsis TPL N-terminal region comprising the LisH and CTLH (C-terminal to LisH) domains and a newly identified third region, which corresponds to a CRA domain. Comparing the structure of TPL with the mammalian TBL1, which shares a similar domain structure and performs a parallel corepressor function, revealed that the plant TPLs have evolved a new tetramerization interface and unique and highly conserved surface for interaction with repressors. Using site-directed mutagenesis, we validated those surfaces in vitro and in vivo and showed that TPL tetramerization and repressor binding are interdependent. Our results illustrate how evolution used a common set of protein domains to create a diversity of corepressors, achieving similar properties with different molecular solutions.


    Organizational Affiliation

    Laboratoire de Physiologie Cellulaire et Végétale, Université Grenoble Alpes, CNRS, Commissariat à l'Energie Atomique et aux Energies Alternatives/Biosciences and Biotechnology Institute of Grenoble, Institut National de la Recherche Agronomique (INRA), F-38000 Grenoble, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein TOPLESS
A, B
210Arabidopsis thalianaMutation(s): 0 
Gene Names: TPL (WSIP1)
Find proteins for Q94AI7 (Arabidopsis thaliana)
Go to UniProtKB:  Q94AI7
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.61 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.200 
  • Space Group: P 31 1 2
Unit Cell:
Length (Å)Angle (°)
a = 72.681α = 90.00
b = 72.681β = 90.00
c = 181.147γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
XSCALEdata scaling
BUSTERrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-07-26
    Type: Initial release
  • Version 1.1: 2017-08-02
    Type: Database references