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Related Concept Videos

Conservation of Protein Domains Over Different Proteins02:26

Conservation of Protein Domains Over Different Proteins

Protein domains are small structurally independent units that are part of a single amino acid chain.  Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
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Protein WISDOM: A Workbench for In silico De novo Design of BioMolecules
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Published on: July 25, 2013

All repeats are not equal: a module-based approach to guide repeat protein design.

Nicholas Sawyer1,2, Jieming Chen1,3, Lynne Regan1,2,3,4

  • 1Integrated Graduate Program in Physical and Engineering Biology, Yale University, 266 Whitney Avenue, New Haven, CT 06511, USA.

Journal of Molecular Biology
|February 26, 2013
PubMed
Summary

A new module-based approach reveals distinct classes within repeat proteins, improving the design of molecular recognition tools. This method captures key repeat-specific features for future protein engineering.

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Area of Science:

  • Protein engineering
  • Structural biology
  • Molecular recognition

Background:

  • Repeat proteins, characterized by tandem arrays of structural motifs, are crucial for mediating protein-protein interactions.
  • Previous design strategies for repeat protein tools relied on consensus sequences, overlooking natural context and assuming repeat equivalence.

Purpose of the Study:

  • To introduce and validate a module-based approach for analyzing repeat proteins.
  • To identify repeat-specific features that can enhance the design of molecular recognition tools.

Main Methods:

  • Alignment of repeat protein modules to identify sequence and structural variations.
  • Analysis of tetratricopeptide repeat (TPR) modules, specifically three-repeat (3TPR) modules.
  • Comparative analysis across different repeat protein families, including armadillo repeats.

Main Results:

  • Identification of two distinct classes of 3TPR modules with unique structural signatures and functional residues.
  • Discovery of significant correlations across ligand-binding surfaces, suggesting coevolution.
  • Evidence of repeat-specific features in other repeat protein families, such as armadillo repeats.

Conclusions:

  • The module-based approach effectively captures critical repeat-specific features for protein design.
  • This methodology provides a foundation for more sophisticated and context-aware design of repeat protein-based molecular recognition tools.