Infrared Spectrum of the Purple Membrane: Clue to a Proton Conduction Mechanism?

Overview

Journal Science

Specialty Science

Date 1982 Apr 23

PMID 6280277

Citations 22

Authors

S Krimm

A M Dwivedi

Affiliations

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Abstract

The infrared spectrum of the purple membrane of Halobacterium halobium has amide I and amide A frequencies that are anomalously high for standard alpha-helical structures. Normal mode calculations indicate that these and other unusual features of the spectrum can be attributed to alpha 11-helices. Such structures suggest that the helix backbone may provide the framework through which proton transport takes place.

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