3UJG

Crystal structure of SnRK2.6 in complex with HAB1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Molecular mimicry regulates ABA signaling by SnRK2 kinases and PP2C phosphatases.

Soon, F.F.Ng, L.M.Zhou, X.E.West, G.M.Kovach, A.Tan, M.H.Suino-Powell, K.M.He, Y.Xu, Y.Chalmers, M.J.Brunzelle, J.S.Zhang, H.Yang, H.Jiang, H.Li, J.Yong, E.L.Cutler, S.Zhu, J.K.Griffin, P.R.Melcher, K.Xu, H.E.

(2012) Science 335: 85-88

  • DOI: 10.1126/science.1215106
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Abscisic acid (ABA) is an essential hormone for plants to survive environmental stresses. At the center of the ABA signaling network is a subfamily of type 2C protein phosphatases (PP2Cs), which form exclusive interactions with ABA receptors and subf ...

    Abscisic acid (ABA) is an essential hormone for plants to survive environmental stresses. At the center of the ABA signaling network is a subfamily of type 2C protein phosphatases (PP2Cs), which form exclusive interactions with ABA receptors and subfamily 2 Snfl-related kinase (SnRK2s). Here, we report a SnRK2-PP2C complex structure, which reveals marked similarity in PP2C recognition by SnRK2 and ABA receptors. In the complex, the kinase activation loop docks into the active site of PP2C, while the conserved ABA-sensing tryptophan of PP2C inserts into the kinase catalytic cleft, thus mimicking receptor-PP2C interactions. These structural results provide a simple mechanism that directly couples ABA binding to SnRK2 kinase activation and highlight a new paradigm of kinase-phosphatase regulation through mutual packing of their catalytic sites.


    Organizational Affiliation

    Laboratory of Structural Sciences, Van Andel Research Institute, 333 Bostwick Avenue NE, Grand Rapids, MI 49503, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein kinase SRK2E
A
361Arabidopsis thalianaMutation(s): 2 
Gene Names: SRK2E (OST1, SNRK2.6)
EC: 2.7.11.1
Find proteins for Q940H6 (Arabidopsis thaliana)
Go to UniProtKB:  Q940H6
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Protein phosphatase 2C 16
B
350Arabidopsis thalianaMutation(s): 0 
Gene Names: HAB1 (P2C-HA)
EC: 3.1.3.16
Find proteins for Q9CAJ0 (Arabidopsis thaliana)
Go to UniProtKB:  Q9CAJ0
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
MG
Query on MG

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.207 
  • Space Group: I 4
Unit Cell:
Length (Å)Angle (°)
a = 154.835α = 90.00
b = 154.835β = 90.00
c = 70.966γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
PDB_EXTRACTdata extraction
PHASERphasing
SCALEPACKdata scaling
REFMACrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-02-15
    Type: Initial release