3K90

The Abscisic acid receptor PYR1 in complex with Abscisic Acid


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.202 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

The abscisic acid receptor PYR1 in complex with abscisic acid.

Santiago, J.Dupeux, F.Round, A.Antoni, R.Park, S.Y.Jamin, M.Cutler, S.R.Rodriguez, P.L.Marquez, J.A.

(2009) Nature 462: 665-668

  • DOI: https://doi.org/10.1038/nature08591
  • Primary Citation of Related Structures:  
    3K90

  • PubMed Abstract: 

    The plant hormone abscisic acid (ABA) has a central role in coordinating the adaptive response in situations of decreased water availability as well as the regulation of plant growth and development. Recently, a 14-member family of intracellular ABA receptors, named PYR/PYL/RCAR, has been identified. These proteins inhibit in an ABA-dependent manner the activity of a family of key negative regulators of the ABA signalling pathway: the group-A protein phosphatases type 2C (PP2Cs). Here we present the crystal structure of Arabidopsis thaliana PYR1, which consists of a dimer in which one of the subunits is bound to ABA. In the ligand-bound subunit, the loops surrounding the entry to the binding cavity fold over the ABA molecule, enclosing it inside, whereas in the empty subunit they form a channel leaving an open access to the cavity, indicating that conformational changes in these loops have a critical role in the stabilization of the hormone-receptor complex. By providing structural details on the ABA-binding pocket, this work paves the way for the development of new small molecules able to activate the plant stress response.


  • Organizational Affiliation

    Instituto de Biología Molecular y Celular de Plantas, Consejo Superior de Investigaciones Científicas-Universidad Politécnica de Valencia, ES-46022 Valencia, Spain.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Putative uncharacterized protein
A, B, C, D
193Arabidopsis thalianaMutation(s): 1 
Gene Names: AT4g17870T6K21.50
UniProt
Find proteins for O49686 (Arabidopsis thaliana)
Explore O49686 
Go to UniProtKB:  O49686
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO49686
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.202 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.81α = 105.65
b = 61.28β = 102.23
c = 72.55γ = 89.91
Software Package:
Software NamePurpose
XDSdata scaling
PHASERphasing
REFMACrefinement
XDSdata reduction

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-11-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.2: 2021-11-10
    Changes: Database references, Derived calculations, Structure summary
  • Version 1.3: 2023-11-01
    Changes: Data collection, Refinement description