1HO7

NMR STRUCTURE OF THE POTASSIUM CHANNEL FRAGMENT L45 IN TFE


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 
  • Selection Criteria: closest to average structure 

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This is version 1.2 of the entry. See complete history


Literature

Three-dimensional structure of the S4-S5 segment of the Shaker potassium channel.

Ohlenschlager, O.Hojo, H.Ramachandran, R.Gorlach, M.Haris, P.I.

(2002) Biophys J 82: 2995-3002

  • DOI: 10.1016/S0006-3495(02)75640-3
  • Primary Citation of Related Structures:  
    1HO7, 1HO2

  • PubMed Abstract: 
  • The propagation of action potentials during neuronal signal transduction in phospholipid membranes is mediated by ion channels, a diverse group of membrane proteins. The S4-S5 linker peptide (S4-S5), that connects the S4 and S5 transmembrane segments ...

    The propagation of action potentials during neuronal signal transduction in phospholipid membranes is mediated by ion channels, a diverse group of membrane proteins. The S4-S5 linker peptide (S4-S5), that connects the S4 and S5 transmembrane segments of voltage-gated potassium channels is an important region of the Shaker ion-channel protein. Despite its importance, very little is known about its structure. Here we provide evidence for an amphipathic alpha-helical conformation of a synthetic S4-S5 peptide of the voltage-gated Drosophila melanogaster Shaker potassium channel in water/trifluoroethanol and in aqueous phospholipid micelles. The three-dimensional solution structures of the S4-S5 peptide were obtained by high-resolution nuclear magnetic resonance spectroscopy and distance-geometry/simulated-annealing calculations. The detailed structural features are discussed with respect to model studies and available mutagenesis data on the mechanism and selectivity of the potassium channel.


    Organizational Affiliation

    Institut für Molekulare Biotechnologie, Centre for Design and Structure in Biology, D-07708 Jena, Germany.



Macromolecules
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
VOLTAGE-GATED POTASSIUM CHANNEL PROTEINA20Drosophila melanogasterMutation(s): 0 
Gene Names: ShmnsCG12348
Find proteins for P08510 (Drosophila melanogaster)
Explore P08510 
Go to UniProtKB:  P08510
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 
  • Selection Criteria: closest to average structure 
  • OLDERADO: 1HO7 Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-06-05
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance