3RT0

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.113 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.173 

wwPDB Validation 3D Report Full Report


This is version 1.1 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: 10.1016/j.molcel.2011.05.011
  • Primary Citation of Related Structures:  

  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein phosphatase 2C 16
A, B
340Arabidopsis thalianaMutation(s): 1 
Gene Names: HAB1 (P2C-HA)
EC: 3.1.3.16
Find proteins for Q9CAJ0 (Arabidopsis thaliana)
Go to UniProtKB:  Q9CAJ0
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Abscisic acid receptor PYL10
C, D
183Arabidopsis thalianaMutation(s): 1 
Gene Names: PYL10 (RCAR4)
Find proteins for Q8H1R0 (Arabidopsis thaliana)
Go to UniProtKB:  Q8H1R0
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.113 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.173 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 70.766α = 90.00
b = 83.503β = 97.20
c = 88.544γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
BSSdata collection
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-06-22
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance