Cited by 156Supramolecular Self-Assembly in MaterialsSupramolecular Chemistry and ComplexesChemical Synthesis and Analysis

Design of a Selective Metal Ion Switch for Self-Assembly of Peptide-Based Fibrils

Dublin, Steven N., Conticello, Vincent P.·2008·Journal of the American Chemical Society

Abstract

The self-assembling peptide TZ1H, a structural variant of the trimeric isoleucine zipper GCN4-pII, contains histidine residues at core d-positions of alternate heptads that define three trigonal coordination sites within the coiled-coil trimer. Circular dichroism spectropolarimetry indicated that peptide TZ1H undergoes a random coil to alpha-helical conformational change upon binding of 1 equiv of silver(I) ion, but not zinc(II), copper(II), or nickel(II) ions. Isothermal titration calorimetry provided evidence for a single binding-site model in which each peptide contributes one net silver(I) coordination site, in agreement with the proposed structural model. Transmission electron microscopy revealed that TZ1H self-assembles into long aspect ratio helical fibers in the presence of silver(I) ion. These results demonstrate that the rational design of selective metal ion binding sites within de novo designed peptides represents a promising approach to the controlled fabrication of nanoscale, self-assembled materials.

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Crossref · 10.1021/ja0775016

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  • Achieving the desired balance between multiple target coiled-coil states often requires several rounds of trial-and-error and a detailed understanding of the energetic factors that discriminate between alternative topologies and oligomerization states.

    “While this has been accomplished in a number of cases,18−31 achieving the desired balance between multiple target coiled-coil states often requires several rounds of trial-and-error and a detailed understanding of the energetic factors that discriminate between alternative topologies and oligomerization states.”

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Authors
Dublin, S. N., & Conticello, V. P.
Affiliations
Emory University (US)
Venue
Journal of the American Chemical Society
Published
2007-12-08
Volume
130
Issue
1
Pages
49-51
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W1973386358
Cited by
156
References
27
Citations by year
2026: 4 · 2025: 8 · 2024: 4 · 2023: 8 · 2022: 9 · 2021: 9 · 2020: 7 · 2019: 5 · 2018: 13 · 2017: 5 · 2016: 6 · 2015: 6 · 2014: 9 · 2013: 7 · 2012: 10
FWCI
5.58
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of the American Chemical Society (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Energy
  • Division of Chemistry
Topics
  • Physical Sciences › Materials Science › Biomaterials › Supramolecular Self-Assembly in Materials
  • Physical Sciences › Chemistry › Organic Chemistry › Supramolecular Chemistry and Complexes
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chemical Synthesis and Analysis
Keywords
peptide self-assembly, metal ion binding, silver(I) coordination, peptide fibrils, helical fibers, conformational change, de novo peptide design, peptide nanofibers
MeSH terms
Binding Sites, Metals, Microscopy, Electron, Peptides, Protein Conformation, Silver, Nanostructures

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