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Related Experiment Video

Updated: Jan 20, 2026

Non-chromatographic Purification of Recombinant Elastin-like Polypeptides and their Fusions with Peptides and Proteins from Escherichia coli
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Turncoat Polypeptides: We Adapt to Our Environment.

Héctor Zamora-Carreras1, Beatriz Maestro2, Jesús M Sanz2,3

  • 1Instituto de Química-Física Rocasolano (IQFR), Consejo Superior de Investigaciones Científicas (CSIC), Serrano 119, 28006, Madrid, Spain.

Chembiochem : a European Journal of Chemical Biology
|August 29, 2019
PubMed
Summary
This summary is machine-generated.

Proteins can adopt multiple structures, challenging the traditional view of protein folding. This structural flexibility, seen in "turncoat" polypeptides, offers versatility for protein design and biomedical applications.

Keywords:
chameleon sequencesmetamorphic proteinsprotein foldingprotein structuresswitch peptides

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Area of Science:

  • Biochemistry and Molecular Biology
  • Structural Biology

Background:

  • Anfinsen's hypothesis posits a single native state for protein folding.
  • This classical view is challenged by proteins adopting multiple conformations.

Purpose of the Study:

  • To review concepts of proteins with exchangeable conformations, termed "turncoat" polypeptides.
  • To explore the implications of structural plasticity in protein function and design.

Main Methods:

  • Literature review of chameleon sequences, metamorphic proteins, and switch peptides.
  • Analysis of the concept of "turncoat" polypeptides.

Main Results:

  • Identified similarities and differences among chameleon sequences, metamorphic proteins, and switch peptides.
  • Highlighted the versatility arising from lack of fixed structural definition.

Conclusions:

  • "Turncoat" polypeptides challenge conventional protein folding paradigms.
  • Structural plasticity provides versatility for protein design, biotechnology, and biomedicine.