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The designability hypothesis and protein evolution.

¹Rockefeller University, 1230 York Avenue, New York, NY 10021, USA. kussele@rockefeller.edu

Protein and Peptide Letters

|February 23, 2005

Summary

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Few protein folds are common in nature, but why? This study reviews the "designability" hypothesis, suggesting successful protein folds are not primarily determined by having more compatible sequences, but other factors are more important.

Area of Science:

Structural biology
Protein science
Evolutionary biology

Background:

Protein fold usage in nature is uneven, with a few folds being highly prevalent.
Understanding the factors driving the success of certain protein folds is a key question in structural biology.

Purpose of the Study:

To critically evaluate the "designability" explanation for protein fold success.
To compare designability with other structural and functional factors influencing fold fitness.
To determine the relative importance of designability in protein fold evolution.

Main Methods:

Literature review and critical analysis of existing hypotheses.
Comparative analysis of designability with structural and functional explanations for fold prevalence.

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Main Results:

The study critically reviews the designability hypothesis, which links fold success to a higher number of compatible sequences.
Designability is considered a contributing factor to fold fitness, but not the primary driver.
Structural and functional properties are likely more significant determinants of protein fold success.

Conclusions:

Protein fold success is multifactorial, with designability playing a role but not being the dominant explanation.
Further research should explore the interplay of structural, functional, and designability aspects in shaping the protein fold landscape.