4EUK

Crystal structure

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.173 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

Structure-Function Analysis of Arabidopsis thaliana Histidine Kinase AHK5 Bound to Its Cognate Phosphotransfer Protein AHP1.

Bauer, J., Reiss, K., Veerabagu, M., Heunemann, M., Harter, K., Stehle, T.

(2013) Mol Plant 6: 959-970

  • DOI: 10.1093/mp/sss126
  • Primary Citation of Related Structures:  
    4EUK

  • PubMed Abstract: 

    • The multi-step phosphorelay (MSP) system defines a key signal transduction pathway in plants and many eukaryotes. In this system, external stimuli first lead to the activation of a histidine kinase, followed by transfer of a phosphoryl group from the receiver domain of the kinase (HK(RD)) to downstream, cytosolic phosphotransfer proteins (HPs) ...

    The multi-step phosphorelay (MSP) system defines a key signal transduction pathway in plants and many eukaryotes. In this system, external stimuli first lead to the activation of a histidine kinase, followed by transfer of a phosphoryl group from the receiver domain of the kinase (HK(RD)) to downstream, cytosolic phosphotransfer proteins (HPs). In order to establish the determinants of specificity for this signaling relay system, we have solved the first crystal structure of a plant HK(RD), AHK5(RD), in complex with one of its cognate HPs, AHP1. AHP1 binds AHK5(RD) via a prominent hydrogen bond docking ridge and a hydrophobic patch. These features are conserved among all AHP proteins, but differ significantly from other structurally characterized prokaryotic and eukaryotic HPs. Surface plasmon resonance experiments show that AHK5(RD) binds to AHP1-3 with similar, micromolar affinity, consistent with the transient nature of this signaling complex. Our correlation of structural and functional data provide the first insight, at the atomic level as well as with quantitative affinity data, into the molecular recognition events governing the MSP in plants.

    Organizational Affiliation: 

    Interfaculty Institute of Biochemistry, University of Tübingen, D-72076 Tübingen, Germany.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Histidine kinase 5A153Arabidopsis thalianaMutation(s): 0 
Gene Names: AHK5, At5g10720, CKI2, MAJ23.80
EC: 2.7.13.3
Find proteins for Q3S4A7 (Arabidopsis thaliana)
Explore Q3S4A7 
Go to UniProtKB:  Q3S4A7
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Histidine-containing phosphotransfer protein 1B159Arabidopsis thalianaMutation(s): 0 
Gene Names: AHP1, At3g21510, ATHP3, MIL23.8
Find proteins for Q9ZNV9 (Arabidopsis thaliana)
Explore Q9ZNV9 
Go to UniProtKB:  Q9ZNV9
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO
Download Ideal Coordinates CCD File 
 D [auth B]1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N		 Ligand Interaction
MG
Query on MG
Download Ideal Coordinates CCD File 
 C [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.173 
  • Space Group: P 21 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 106.8α = 90
b = 106.8β = 90
c = 106.8γ = 90
Software Package:
Software NamePurpose
RemDAqdata collection
autoSHARPphasing
REFMACrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2012-04-25 
  • Released Date: 2013-02-20 
    • Deposition Author(s): Stehle, T., Bauer, J.

Revision History  (Full details and data files)

  • Version 1.0: 2013-02-20
    Type: Initial release
  • Version 1.1: 2013-06-05
    Changes: Database references
  • Version 1.2: 2017-11-15
    Changes: Refinement description