Computer modelling of the transmembrane channel formed by a CNBr peptide of diphtheria toxin B fragment

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Abstract

Diphtheria toxin (DT) forms transmembrane, voltage-dependent channels in a planar lipid bilayer. Channels with similar characteristics were obtained with CB1, a cyanogen bromide peptide of diphtheria toxin B fragment (DTB) (res 340-459). Tryptophan 398 is in interaction with the hydrophobic core of the lipid bilayer. Using the Eisenberg method in association with the Shiffer-Edmunson wheel representation, we have identified two amphipathic α-helices within CB1 (res 346-364 and 389-406) that could be involved in the interaction with lipids. Bearing this information in mind, we are providing a model for the structure of the CB1 channel. © 1992.

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Cabiaux, V., Brasseur, R., Mindell, J., & Ruysschaert, J. M. (1992). Computer modelling of the transmembrane channel formed by a CNBr peptide of diphtheria toxin B fragment. FEMS Microbiology Letters, 105(1–3), 113–119. https://doi.org/10.1016/0378-1097(92)90081-X

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