1ho2
From Proteopedia
OCA (Talk | contribs)
(New page: 200px<br /><applet load="1ho2" size="450" color="white" frame="true" align="right" spinBox="true" caption="1ho2" /> '''NMR STRUCTURE OF THE POTASSIUM CHANNEL FRAGM...)
Next diff →
Revision as of 14:34, 20 November 2007
|
NMR STRUCTURE OF THE POTASSIUM CHANNEL FRAGMENT L45 IN MICELLES
Overview
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.
About this Structure
1HO2 is a Single protein structure of sequence from Drosophila melanogaster. Full crystallographic information is available from OCA.
Reference
Three-dimensional structure of the S4-S5 segment of the Shaker potassium channel., Ohlenschlager O, Hojo H, Ramachandran R, Gorlach M, Haris PI, Biophys J. 2002 Jun;82(6):2995-3002. PMID:12023222
Page seeded by OCA on Tue Nov 20 16:42:08 2007
