3OQU

Crystal structure of native abscisic acid receptor PYL9 with ABA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.68 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural Insights into the Abscisic Acid Stereospecificity by the ABA Receptors PYR/PYL/RCAR

Zhang, X.Jiang, L.Wang, G.Yu, L.Zhang, Q.Xin, Q.Wu, W.Gong, Z.Chen, Z.

(2013) PLoS One 8: e67477-e67477

  • DOI: 10.1371/journal.pone.0067477
  • Primary Citation of Related Structures:  
    3OQU, 4JDL, 4JDA

  • PubMed Abstract: 
  • The phytohormone abscisic acid ((+)-ABA) plays a key role in many processes. The biological and biochemical activities of unnatural (-)-ABA have been extensively investigated since 1960s. However, the recognition mechanism by which only a few members ...

    The phytohormone abscisic acid ((+)-ABA) plays a key role in many processes. The biological and biochemical activities of unnatural (-)-ABA have been extensively investigated since 1960s. However, the recognition mechanism by which only a few members among PYR/PYL/RCAR (PYLs) family can bind (-)-ABA remains largely unknown. Here we systematically characterized the affinity of PYLs binding to the (-)-ABA and reported the crystal structures of apo-PYL5, PYL3-(-)-ABA and PYL9-(+)-ABA. PYL5 showed the strongest binding affinity with (-)-ABA among all the PYLs. PYL9 is a stringently exclusive (+)-ABA receptor with interchangeable disulfide bonds shared by a subclass of PYLs. PYL3 is a dual receptor to both ABA enantiomers. The binding orientation and pocket of (-)-ABA in PYLs are obviously different from those of (+)-ABA. Steric hindrance and hydrophobic interaction are the two key factors in determining the stereospecificity of PYLs binding to (-)-ABA, which is further confirmed by gain-of-function and loss-of-function mutagenesis. Our results provide novel insights of the bioactivity of ABA enantiomers onto PYLs, and shed light on designing the selective ABA receptors agonists.


    Organizational Affiliation

    State Key Laboratory of Agrobiotechnology, China Agricultural University, Beijing, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Abscisic acid receptor PYL9A, B205Arabidopsis thalianaMutation(s): 0 
Gene Names: PYL9RCAR1At1g01360F6F3.16
Find proteins for Q84MC7 (Arabidopsis thaliana)
Explore Q84MC7 
Go to UniProtKB:  Q84MC7
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
A8S
Query on A8S

Download CCD File 
A, B
(2Z,4E)-5-[(1S)-1-hydroxy-2,6,6-trimethyl-4-oxocyclohex-2-en-1-yl]-3-methylpenta-2,4-dienoic acid
C15 H20 O4
JLIDBLDQVAYHNE-YKALOCIXSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.68 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 
  • Space Group: P 32
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 112.024α = 90
b = 112.024β = 90
c = 40.433γ = 120
Software Package:
Software NamePurpose
MAR345dtbdata collection
PHASESphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-09-14
    Type: Initial release
  • Version 1.1: 2013-07-31
    Changes: Database references