4EUK

Crystal structure


Experimental Data Snapshot

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

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

  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Histidine kinase 5
A
153Arabidopsis thalianaMutation(s): 0 
Gene Names: AHK5 (CKI2)
EC: 2.7.13.3
Find proteins for Q3S4A7 (Arabidopsis thaliana)
Go to UniProtKB:  Q3S4A7
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Histidine-containing phosphotransfer protein 1
B
159Arabidopsis thalianaMutation(s): 0 
Gene Names: AHP1 (ATHP3)
Find proteins for Q9ZNV9 (Arabidopsis thaliana)
Go to UniProtKB:  Q9ZNV9
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download SDF File 
Download CCD File 
B
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
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 
  • Space Group: P 21 3
Unit Cell:
Length (Å)Angle (°)
a = 106.800α = 90.00
b = 106.800β = 90.00
c = 106.800γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
autoSHARPphasing
XSCALEdata scaling
REFMACrefinement
RemDAqdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

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

Revision History 

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