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Influence of the nature of the aromatic side-chain on the conductance of the channel of linear gramicidin: study of a series of 9,11,13,15-Tyr(O-protected) derivatives

✍ Scribed by D. Benamar; P. Daumas; Y. Trudelle; B. Calas; R. Bennes; F. Heitz

Publisher
Springer
Year
1993
Tongue
English
Weight
580 KB
Volume
22
Category
Article
ISSN
1432-1017

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✦ Synopsis

Thas paper describes the single channel properties of a series of synthetic analogues of gramicidin A, where all four tryptophans are replaced either by tyrosine or by several O-protected (benzyl, methyl, ethyl or tbutyl) derivatives. It as shown that, although all analogues bear similar dipole moment on their side-chains, the conductance depends on the hydrophobicity of these protecting groups. An analysis of the conductance data suggests that the conductance is governed by the binding process and a possible explanation, based on conformational considerations, is proposed.

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