1S1E

Crystal Structure of Kv Channel-interacting protein 1 (KChIP-1)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.224 

wwPDB Validation 3D Report Full Report


This is version 1.2 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
Kv channel interacting protein 1
A
224Homo sapiensMutation(s): 0 
Gene Names: KCNIP1 (KCHIP1, VABP)
Find proteins for Q9NZI2 (Homo sapiens)
Go to Gene View: KCNIP1
Go to UniProtKB:  Q9NZI2
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.224 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 50.133α = 90.00
b = 50.133β = 90.00
c = 177.329γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

  • Version 1.0: 2005-01-11
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance