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: 2.10 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 

Starting Model: experimental
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This is version 1.3 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: https://doi.org/10.1016/j.molcel.2007.04.013
  • Primary Citation of Related Structures:  
    2EHB

  • 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 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Calcineurin B-like protein 4207Arabidopsis thalianaMutation(s): 0 
Gene Names: SOS3
UniProt
Find proteins for O81223 (Arabidopsis thaliana)
Explore O81223 
Go to UniProtKB:  O81223
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO81223
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
CBL-interacting serine/threonine-protein kinase 24B [auth D]143Arabidopsis thalianaMutation(s): 0 
Gene Names: SOS2
EC: 2.7.11.1
UniProt
Find proteins for Q9LDI3 (Arabidopsis thaliana)
Explore Q9LDI3 
Go to UniProtKB:  Q9LDI3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9LDI3
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.137α = 90
b = 57.387β = 90
c = 141.896γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DNAdata collection
MOSFLMdata reduction
SCALAdata scaling
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-09-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.2: 2024-03-13
    Changes: Data collection, Database references, Derived calculations
  • Version 1.3: 2024-04-03
    Changes: Refinement description