1S1G

Crystal Structure of Kv4.3 T1 Domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.228 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Two N-terminal domains of Kv4 K(+) channels regulate binding to and modulation by KChIP1.

Scannevin, R.H.Wang, K.W.Jow, F.Megules, J.Kopsco, D.C.Edris, W.Carroll, K.C.Xu, W.X.Xu, Z.B.Katz, A.H.Olland, S.Lin, L.Taylor, M.Stahl, M.Malakian, K.Somers, W.Mosyak, L.Bowlby, M.R.Chanda, P.Rhodes, K.J.

(2004) Neuron 41: 587-598

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The family of calcium binding proteins called KChIPs associates with Kv4 family K(+) channels and modulates their biophysical properties. Here, using mutagenesis and X-ray crystallography, we explore the interaction between Kv4 subunits and KChIP1. T ...

    The family of calcium binding proteins called KChIPs associates with Kv4 family K(+) channels and modulates their biophysical properties. Here, using mutagenesis and X-ray crystallography, we explore the interaction between Kv4 subunits and KChIP1. Two regions in the Kv4.2 N terminus, residues 7-11 and 71-90, are necessary for KChIP1 modulation and interaction with Kv4.2. When inserted into the Kv1.2 N terminus, residues 71-90 of Kv4.2 are also sufficient to confer association with KChIP1. To provide a structural framework for these data, we solved the crystal structures of Kv4.3N and KChIP1 individually. Taken together with the mutagenesis data, the individual structures suggest that that the Kv4 N terminus is required for stable association with KChIP1, perhaps through a hydrophobic surface interaction, and that residues 71-90 in Kv4 subunits form a contact loop that mediates the specific association of KChIPs with Kv4 subunits.


    Organizational Affiliation

    Neuroscience Discovery Research, Wyeth Research CN-8000, Princeton, NJ 08543, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Potassium voltage-gated channel subfamily D member 3
A, B
124Homo sapiensMutation(s): 0 
Gene Names: KCND3
Find proteins for Q9UK17 (Homo sapiens)
Go to Gene View: KCND3
Go to UniProtKB:  Q9UK17
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.228 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 84.230α = 90.00
b = 84.230β = 90.00
c = 104.990γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
SCALEPACKdata scaling
DENZOdata reduction
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

  • Version 1.0: 2004-03-23
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2018-06-27
    Type: Data collection, Database references