Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 128, Issue 1, Pages 188-191Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja055494k
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- NCRR NIH HHS [1S10 RR 017948] Funding Source: Medline
- NIGMS NIH HHS [GM 65500] Funding Source: Medline
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Highly specific protein-protein interfaces have been the subject of considerable study for their potential utility in disrupting or interrogating cellular signaling and control networks. We report that coiled-coil sequences decorated with phenylalanine core residues fold into stable a-helical bundles and that these self-sort from similar peptide assemblies with aliphatic core side chains. For self-assembled ensembles derived from 30-residue monomeric peptides, the Delta G of specificity is -1.5 kcal/mol, comparable with earlier self-sorting coiled-coil systems. Intriguingly, although this interface is constructed from canonical amino acids, it does not appear to have been exploited in native proteins.
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