Macromolecule Content

• Total Structure Weight: 2.20 kDa 
• Atom Count: 152 
• Residue Count: 20 
• Unique protein chains: 1

1HO2

NMR STRUCTURE OF THE POTASSIUM CHANNEL FRAGMENT L45 IN MICELLES

• DOI: 10.2210/pdb1HO2/pdb

• Classification: MEMBRANE PROTEIN
• Organism(s): Drosophila melanogaster
• Mutation(s): No 


• Deposited: 2000-12-08 Released: 2002-06-05 
• Deposition Author(s): Ohlenschlager, O., Hojo, H., Ramachandran, R., Gorlach, M., Haris, P.I.

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Experimental Data Snapshot

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

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

• PubMed: 12023222 
• 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 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
VOLTAGE-GATED POTASSIUM CHANNEL PROTEIN	A	20	Drosophila melanogaster	Mutation(s): 0  Gene Names: Sh, mns, CG12348
Find proteins for P08510 (Drosophila melanogaster) Explore P08510  Go to UniProtKB:  P08510

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 1 
• Selection Criteria: closest to average structure 
• OLDERADO: 1HO2 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-12-08 
• Released Date: 2002-06-05 
Deposition Author(s): Ohlenschlager, O., Hojo, H., Ramachandran, R., Gorlach, M., Haris, P.I.

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