2EHB

The structure of the C-terminal domain of the protein kinase AtSOS2 bound to the calcium sensor AtSOS3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.215 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The structure of the C-terminal domain of the protein kinase AtSOS2 bound to the calcium sensor AtSOS3

Sanchez-Barrena, M.J.Fujii, H.Angulo, I.Martinez-Ripoll, M.Zhu, J.K.Albert, A.

(2007) Mol.Cell 26: 427-435

  • DOI: 10.1016/j.molcel.2007.04.013

  • PubMed Abstract: 
  • The plant SOS2 family of protein kinases and their interacting activators, the SOS3 family of calcium-binding proteins, function together in decoding calcium signals elicited by different environmental stimuli. SOS2 is activated by Ca-SOS3 and subseq ...

    The plant SOS2 family of protein kinases and their interacting activators, the SOS3 family of calcium-binding proteins, function together in decoding calcium signals elicited by different environmental stimuli. SOS2 is activated by Ca-SOS3 and subsequently phosphorylates the ion transporter SOS1 to bring about cellular ion homeostasis under salt stress. In addition to possessing the kinase activity, members of the SOS2 family of protein kinases can bind to protein phosphatase 2Cs. The crystal structure of the binary complex of Ca-SOS3 with the C-terminal regulatory moiety of SOS2 resolves central questions regarding the dual function of SOS2 as a kinase and a phosphatase-binding protein. A comparison with the structure of unbound SOS3 reveals the basis of the molecular function of this family of kinases and their interacting calcium sensors. Furthermore, our study suggests that the structure of the phosphatase-interaction domain of SOS2 defines a scaffold module conserved from yeast to human.


    Organizational Affiliation

    Grupo de Cristalografía Macromolecular y Biología Estructural, Instituto de Química Física Rocasolano, Consejo Superior de Investigaciones Científicas, Serrano 119, Madrid E-28006, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Calcineurin B-like protein 4
A
207Arabidopsis thalianaMutation(s): 0 
Gene Names: CBL4 (SOS3)
Find proteins for O81223 (Arabidopsis thaliana)
Go to UniProtKB:  O81223
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CBL-interacting serine/threonine-protein kinase 24
D
143Arabidopsis thalianaMutation(s): 0 
Gene Names: CIPK24 (SnRK3.11, SOS2)
EC: 2.7.11.1
Find proteins for Q9LDI3 (Arabidopsis thaliana)
Go to UniProtKB:  Q9LDI3
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.215 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 44.137α = 90.00
b = 57.387β = 90.00
c = 141.896γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
REFMACrefinement
DNAdata collection
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-09-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Derived calculations, Version format compliance