3RT0

Crystal structure of PYL10-HAB1 complex in the absence of abscisic acid (ABA)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.11 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The Molecular Basis of ABA-Independent Inhibition of PP2Cs by a Subclass of PYL Proteins

Hao, Q.Yin, P.Li, W.Wang, L.Yan, C.Lin, Z.Wu, J.Z.Wang, J.Yan, S.F.Yan, N.

(2011) Mol Cell 42: 662-672

  • DOI: https://doi.org/10.1016/j.molcel.2011.05.011
  • Primary Citation of Related Structures:  
    3RT0, 3RT2

  • PubMed Abstract: 

    PYR1/PYL/RCAR proteins (PYLs) are confirmed abscisic acid (ABA) receptors, which inhibit protein phosphatase 2C (PP2C) upon binding to ABA. Arabidopsis thaliana has 14 PYLs, yet their functional distinction remains unclear. Here, we report systematic biochemical characterization of PYLs. A subclass of PYLs, represented by PYL10, inhibited PP2C in the absence of any ligand. Crystal structures of PYL10, both in the free form and in the HAB1 (PP2C)-bound state, revealed the structural basis for its constitutive activity. Structural-guided biochemical analyses revealed that ABA-independent inhibition of PP2C requires the PYLs to exist in a monomeric state. In addition, the residues guarding the entrance to the ligand-binding pocket of these PYLs should be bulky and hydrophobic. Based on these principles, we were able to generate monomeric PYL2 variants that gained constitutive inhibitory effect on PP2Cs. These findings provide an important framework for understanding the complex regulation of ABA signaling by PYL proteins.


  • Organizational Affiliation

    State Key Laboratory of Biomembrane and Membrane Biotechnology, Tsinghua University, Beijing 100084, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein phosphatase 2C 16
A, B
340Arabidopsis thalianaMutation(s): 1 
Gene Names: HAB1
EC: 3.1.3.16
UniProt
Find proteins for Q9CAJ0 (Arabidopsis thaliana)
Explore Q9CAJ0 
Go to UniProtKB:  Q9CAJ0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9CAJ0
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Abscisic acid receptor PYL10
C, D
183Arabidopsis thalianaMutation(s): 1 
Gene Names: PYL10
UniProt
Find proteins for Q8H1R0 (Arabidopsis thaliana)
Explore Q8H1R0 
Go to UniProtKB:  Q8H1R0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8H1R0
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.11 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.766α = 90
b = 83.503β = 97.2
c = 88.544γ = 90
Software Package:
Software NamePurpose
BSSdata collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-06-22
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2023-11-01
    Changes: Data collection, Database references, Derived calculations, Refinement description