1EOD

CRYSTAL STRUCTURE OF THE N136D MUTANT OF A SHAKER T1 DOMAIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.211 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Voltage dependent activation of potassium channels is coupled to T1 domain structure.

Cushman, S.J.Nanao, M.H.Jahng, A.W.DeRubeis, D.Choe, S.Pfaffinger, P.J.

(2000) Nat Struct Biol 7: 403-407

  • DOI: 10.1038/75185
  • Primary Citation of Related Structures:  
    1EOF, 1EOE, 1EOD

  • PubMed Abstract: 
  • The T1 domain, a highly conserved cytoplasmic portion at the N-terminus of the voltage-dependent K+ channel (Kv) alpha-subunit, is responsible for driving and regulating the tetramerization of the alpha-subunits. Here we report the identification of a set of mutations in the T1 domain that alter the gating properties of the Kv channel ...

    The T1 domain, a highly conserved cytoplasmic portion at the N-terminus of the voltage-dependent K+ channel (Kv) alpha-subunit, is responsible for driving and regulating the tetramerization of the alpha-subunits. Here we report the identification of a set of mutations in the T1 domain that alter the gating properties of the Kv channel. Two mutants produce a leftward shift in the activation curve and slow the channel closing rate while a third mutation produces a rightward shift in the activation curve and speeds the channel closing rate. We have determined the crystal structures of T1 domains containing these mutations. Both of the leftward shifting mutants produce similar conformational changes in the putative membrane facing surface of the T1 domain. These results suggest that the structure of the T1 domain in this region is tightly coupled to the channel's gating states.


    Organizational Affiliation

    Division of Neuroscience, S613, Baylor College of Medicine, 1 Baylor Plaza, Houston, Texas 77030, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
POTASSIUM CHANNEL KV1.1 A100Aplysia californicaMutation(s): 1 
Find proteins for Q16968 (Aplysia californica)
Explore Q16968 
Go to UniProtKB:  Q16968
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.211 
  • Space Group: I 4 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.464α = 90
b = 59.464β = 90
c = 146.889γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-05-02
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-01-31
    Changes: Experimental preparation