Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 133, Issue 19, Pages 7336-7339Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja202175a
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Funding
- NSF [CHE-0848847]
- JSPS
- NIH
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [848847] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [832760] Funding Source: National Science Foundation
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Artificial mimicry of alpha-helices offers a basis for development of protein-protein interaction antagonists. Here we report a new type of unnatural peptidic backbone, containing alpha-, beta-, and gamma-amino acid residues in an alpha gamma alpha alpha beta alpha repeat pattern, for this purpose. This unnatural hexad has the same number of backbone atoms as a heptad of alpha residues. Two-dimensional NMR data clearly establish the formation of an alpha-helix-like conformation in aqueous solution. The helix formed by our 12-mer alpha/beta/gamma-peptide is considerably more stable than the alpha-helix formed by an analogous 14-mer alpha-peptide, presumably because of the preorganized beta and gamma residues employed.
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