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A Protocol for Computer-Based Protein Structure and Function Prediction
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Protein-like tertiary folding behavior from heterogeneous backbones.

Zachary E Reinert1, George A Lengyel, W Seth Horne

  • 1Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.

Journal of the American Chemical Society
|August 14, 2013
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Researchers created synthetic foldamers that mimic natural proteins. This new sequence-based approach enables unnatural backbones to achieve complex protein-like tertiary folds, advancing biomimetic design.

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Area of Science:

  • Biochemistry
  • Synthetic Biology
  • Protein Engineering

Background:

  • Proteins are essential biomolecules with complex structures and functions.
  • Synthetic agents are being developed to mimic natural proteins.
  • Designing unnatural molecules that fold like proteins, especially with tertiary structures, remains a significant challenge.

Purpose of the Study:

  • To develop a sequence-based strategy for creating synthetic foldamers that mimic natural protein tertiary structures.
  • To design unnatural backbone oligomers capable of folding into complex, protein-like three-dimensional shapes.
  • To demonstrate the feasibility of converting natural proteins into analogues with partially unnatural backbones while retaining folding behavior.

Main Methods:

  • Utilizing a sequence-based design approach to guide the folding of unnatural backbone oligomers.
  • Modifying a natural protein's sequence to incorporate approximately 20% unnatural building blocks.
  • Analyzing the folding behavior and structural similarity of the modified protein analogue to the parent protein.

Main Results:

  • Successfully designed a sequence-based approach for creating foldamers with protein-like tertiary structures.
  • Developed a protein analogue with a backbone comprising ~20% unnatural building blocks.
  • Demonstrated that the unnatural analogue exhibits folding behavior similar to the original natural protein.

Conclusions:

  • A sequence-based strategy can enable unnatural backbones to achieve complex tertiary folds, mimicking natural proteins.
  • It is possible to create functional protein analogues with partially unnatural backbones that retain native folding patterns.
  • This work represents a significant advancement in the field of biomimetic chemistry and protein engineering.