The complete conformation of the valinomycin-potassium ion complex in methanol is presented. Extension from the reported secondary structure requires arguments and data relating to ester orientation, direction of coiling, side-chain orientation, and conformational stability. Conformation of the valinomycin-potassium ion complex provides a clear-cut example in which elucidation of conformation is sufficient to gain an understanding of molecular function which, in this case, is selective ion transport by a carrier mechanism.
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| http://dx.doi.org/10.1126/science.168.3935.1091 | DOI Listing |
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The solution conformations of complexes of valinomycin with magnesium and strontium were investigated by circular dichroism, nuclear magnetic resonance and infrared techniques. The results were compared with our earlier results on lithium, calcium, manganese and barium complexes. All these cations, except lithium, form 2:1 ion sandwich and 1:1 carrier-cation complexes with valinomycin.
View Article and Find Full Text PDFThe complete conformation of the valinomycin-potassium ion complex in methanol is presented. Extension from the reported secondary structure requires arguments and data relating to ester orientation, direction of coiling, side-chain orientation, and conformational stability. Conformation of the valinomycin-potassium ion complex provides a clear-cut example in which elucidation of conformation is sufficient to gain an understanding of molecular function which, in this case, is selective ion transport by a carrier mechanism.
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