5HU3

Drosophila CaMKII-D136N in complex with a phosphorylated fragment of the Eag potassium channel and Mg2+/ADP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.885 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The Interaction between the Drosophila EAG Potassium Channel and the Protein Kinase CaMKII Involves an Extensive Interface at the Active Site of the Kinase.

Castro-Rodrigues, A.F.Zhao, Y.Fonseca, F.Gabant, G.Cadene, M.Robertson, G.A.Morais-Cabral, J.H.

(2018) J.Mol.Biol. 430: 5029-5049

  • DOI: 10.1016/j.jmb.2018.10.015
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The Drosophila EAG (dEAG) potassium channel is the founding member of the superfamily of KNCH channels, which are involved in cardiac repolarization, neuronal excitability and cellular proliferation. In flies, dEAG is involved in regulation of neuron ...

    The Drosophila EAG (dEAG) potassium channel is the founding member of the superfamily of KNCH channels, which are involved in cardiac repolarization, neuronal excitability and cellular proliferation. In flies, dEAG is involved in regulation of neuron firing and assembles with CaMKII to form a complex implicated in memory formation. We have characterized the interaction between the kinase domain of CaMKII and a 53-residue fragment of the dEAG channel that includes a canonical CaMKII recognition sequence. Crystal structures together with biochemical/biophysical analysis show a substrate-kinase complex with an unusually tight and extensive interface that appears to be strengthened by phosphorylation of the channel fragment. Electrophysiological recordings show that catalytically active CaMKII is required to observe active dEAG channels. A previously identified phosphorylation site in the recognition sequence is not the substrate for this crucial kinase activity, but rather contributes importantly to the tight interaction of the kinase with the channel. The available data suggest that the dEAG channel is a docking platform for the kinase and that phosphorylation of the channel's kinase recognition sequence modulates the strength of the interaction between the channel and the kinase.


    Organizational Affiliation

    IBMC, Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal; i3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,Centre de Biophysique Moléculaire, CNRS UPR430, Orléans, France.,IBMC, Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, Portugal; i3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal. Electronic address: jcabral@ibmc.up.pt.,Department of Neuroscience, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Calcium/calmodulin-dependent protein kinase type II alpha chain
A
285Drosophila melanogasterMutation(s): 1 
Gene Names: CaMKII (CaM)
EC: 2.7.11.17
Find proteins for Q00168 (Drosophila melanogaster)
Go to UniProtKB:  Q00168
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Potassium voltage-gated channel protein eag
B
54Drosophila melanogasterMutation(s): 0 
Gene Names: eag
Find proteins for Q02280 (Drosophila melanogaster)
Go to UniProtKB:  Q02280
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download SDF File 
Download CCD File 
A
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TPO
Query on TPO
B
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.885 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.192 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 36.907α = 90.00
b = 59.217β = 96.68
c = 70.301γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
REFMACphasing
PHENIXrefinement
SCALAdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-02-01
    Type: Initial release
  • Version 1.1: 2019-11-13
    Type: Database references